Exhibit 4.2


 


[SERIES A/SERIES B] COMMON STOCK PURCHASE WARRANT


 


CHECKPOINT
THERAPEUTICS, INC.


 


	Warrant Shares: [_______]	Issue Date:______, 2022
	 	 
	 	Initial Exercise Date:______, 2022


 


THIS [SERIES A/SERIES B] COMMON
STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, _____________ or its assigns (the “Holder”)
is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after
the date set forth above (the “Initial Exercise Date”) and on or prior to 5:00 p.m. (New York City time) on [______________]1
2 (the “Termination Date”) but not thereafter, to subscribe for and purchase from Checkpoint Therapeutics, Inc.,
a Delaware corporation (the “Company”), up to ______ shares (as subject to adjustment hereunder, the “Warrant
Shares”) of Common Stock. The purchase price of one share of Common Stock under this Warrant shall be equal to the Exercise
Price, as defined in Section 2(b).


 


Section 1.              Definitions.
Capitalized terms used and not otherwise defined herein shall have the meanings set forth in that certain Securities Purchase Agreement
(the “Purchase Agreement”), dated December 14, 2022, among the Company and the purchasers signatory thereto.


 


Section 2.              Exercise.


 


a)            Exercise
of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at any time or times on
or after the Initial Exercise Date and on or before the Termination Date by delivery to the Company of a duly executed PDF copy submitted
by e-mail (or e-mail attachment) of the Notice of Exercise in the form annexed hereto (the “Notice of Exercise”).
Within the earlier of (i) two (2) Trading Days and (ii) the number of Trading Days comprising the Standard Settlement
Period (as defined in Section 2(d)(i) herein) following the date of exercise as aforesaid, the Holder shall deliver the aggregate
Exercise Price for the Warrant Shares specified in the applicable Notice of Exercise by wire transfer or cashier’s check drawn
on a United States bank unless the cashless exercise procedure specified in Section 2(c) below is specified in the applicable
Notice of Exercise. No ink-original Notice of Exercise shall be required, nor shall any medallion guarantee (or other type of guarantee
or notarization) of any Notice of Exercise be required. Notwithstanding anything herein to the contrary, the Holder shall not be required
to physically surrender this Warrant to the Company until the Holder has purchased all of the Warrant Shares available hereunder and
the Warrant has been exercised in full, in which case, the Holder shall surrender this Warrant to the Company for cancellation within
three (3) Trading Days of the date on which the final Notice of Exercise is delivered to the Company. Partial exercises of this
Warrant resulting in purchases of a portion of the total number of Warrant Shares available hereunder shall have the effect of lowering
the outstanding number of Warrant Shares purchasable hereunder in an amount equal to the applicable number of Warrant Shares purchased.
The Holder and the Company shall maintain records showing the number of Warrant Shares purchased and the date of such purchases. The
Company shall deliver any objection to any Notice of Exercise within one (1) Business Day of receipt of such notice. The Holder
and any assignee, by acceptance of this Warrant, acknowledge and agree that, by reason of the provisions of this paragraph, following
the purchase of a portion of the Warrant Shares hereunder, the number of Warrant Shares available for purchase hereunder at any given
time may be less than the amount stated on the face hereof.


 





 











1
Series A Warrant: Insert the date that is the five (5) year anniversary of the Issue Date, provided that, if such date is
not a Trading Day, insert the immediately following Trading Day.


2
Series B Warrant: Insert the date that is the eighteen (18) month anniversary of the Issue Date, provided that, if such
date is not a Trading Day, insert the immediately following Trading Day.


 






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b)           Exercise
Price. The exercise price per share of Common Stock under this Warrant shall be $4.075, subject to adjustment hereunder (the
 “Exercise Price”).


 


c)           Cashless
Exercise. If at the time of exercise hereof there is no effective registration statement registering, or the prospectus contained
therein is not available for the issuance of the Warrant Shares to the Holder, then this Warrant may also be exercised, in whole or in
part, at such time by means of a “cashless exercise” in which the Holder shall be entitled to receive a number of Warrant
Shares equal to the quotient obtained by dividing [(A-B) (X)] by (A), where:


 


		(A)	= as applicable: (i) the VWAP on the Trading Day immediately
preceding the date of the applicable Notice of Exercise if such Notice of Exercise is (1) both executed and delivered pursuant to
Section 2(a) hereof on a day that is not a Trading Day or (2) both executed and delivered pursuant to Section 2(a) hereof
on a Trading Day prior to the opening of “regular trading hours” (as defined in Rule 600(b) of Regulation NMS promulgated
under the federal securities laws) on such Trading Day, (ii) at the option of the Holder, either (y) the VWAP on the Trading
Day immediately preceding the date of the applicable Notice of Exercise or (z) the Bid Price of the Common Stock on the principal
Trading Market as reported by Bloomberg L.P. as of the time of the Holder’s execution of the applicable Notice of Exercise if such
Notice of Exercise is executed during “regular trading hours” on a Trading Day and is delivered within two (2) hours
thereafter (including until two (2) hours after the close of “regular trading hours” on a Trading Day) pursuant to Section 2(a) hereof
or (iii) the VWAP on the date of the applicable Notice of Exercise if the date of such Notice of Exercise is a Trading Day and such
Notice of Exercise is both executed and delivered pursuant to Section 2(a) hereof after the close of “regular trading
hours” on such Trading Day;



 


		(B)	= the Exercise Price of this Warrant, as adjusted hereunder;
and



 


		(X)	= the number of Warrant Shares that would be issuable upon exercise
of this Warrant in accordance with the terms of this Warrant if such exercise were by means of a cash exercise rather than a cashless
exercise.



 






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“Bid Price” means, for any
date, the price determined by the first of the following clauses that applies: (a) if the Common Stock is then listed or quoted
on a Trading Market, the bid price of the Common Stock for the time in question (or the nearest preceding date) on the Trading Market
on which the Common Stock is then listed or quoted as reported by Bloomberg (based on a Trading Day from 9:30 a.m. (New York City
time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading Market, the volume weighted average price
of the Common Stock for such date (or the nearest preceding date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not
then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common Stock are then reported on The Pink Open Market (or
a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common
Stock so reported, or (d) in all other cases, the fair market value of a share of Common Stock as determined by an independent appraiser
selected in good faith by the Holders of a majority in interest of the Securities then outstanding and reasonably acceptable to the Company,
the fees and expenses of which shall be paid by the Company.


 


“VWAP” means, for any date,
the price determined by the first of the following clauses that applies: (a) if the Common Stock is then listed or quoted on a Trading
Market, the daily volume weighted average price of the Common Stock for such date (or the nearest preceding date) on the Trading Market
on which the Common Stock is then listed or quoted as reported by Bloomberg (based on a Trading Day from 9:30 a.m. (New York City
time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading Market, the volume weighted average price
of the Common Stock for such date (or the nearest preceding date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not
then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common Stock are then reported on The Pink Open Market (or
a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common
Stock so reported, or (d) in all other cases, the fair market value of a share of Common Stock as determined by an independent appraiser
selected in good faith by the holders of a majority in interest of the Securities then outstanding and reasonably acceptable to the Company,
the fees and expenses of which shall be paid by the Company.


 


If Warrant Shares
are issued in such a cashless exercise, the parties acknowledge and agree that in accordance with Section 3(a)(9) of the Securities
Act, the Warrant Shares shall take on the registered characteristics of the Warrants being exercised.  The Company agrees not
to take any position contrary to this Section 2(c).


 






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		d)	Mechanics of Exercise.



 


i.            Delivery
of Warrant Shares Upon Exercise. The Company shall cause the Warrant Shares purchased hereunder to be transmitted by the Transfer
Agent to the Holder by crediting the account of the Holder’s or its designee’s balance account with The Depository Trust
Company through its Deposit or Withdrawal at Custodian system (“DWAC”) if the Company is then a participant in such
system and either (A) there is an effective registration statement permitting the issuance of the Warrant Shares to or resale of
the Warrant Shares by Holder or (B) this Warrant is being exercised via cashless exercise, and otherwise by physical delivery of
a certificate, registered in the Company’s share register in the name of the Holder or its designee, for the number of Warrant
Shares to which the Holder is entitled pursuant to such exercise to the address specified by the Holder in the Notice of Exercise by
the date that is the earliest of (i) two (2) Trading Days after the delivery to the Company of the Notice of Exercise, (ii) one
(1) Trading Day after delivery of the aggregate Exercise Price to the Company and (iii) the number of Trading Days comprising
the Standard Settlement Period after the delivery to the Company of the Notice of Exercise (such date, the “Warrant Share Delivery
Date”). Upon delivery of the Notice of Exercise, 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 of delivery of the Warrant
Shares, provided that payment of the aggregate Exercise Price (other than in the case of a cashless exercise) is received within the
earlier of (i) two (2) Trading Days and (ii) the number of Trading Days comprising the Standard Settlement Period following
delivery of the Notice of Exercise. If the Company fails for any reason to deliver to the Holder the Warrant Shares subject to a Notice
of Exercise by the Warrant Share Delivery Date, the Company shall pay to the Holder, in cash, as liquidated damages and not as a penalty,
for each $1,000 of Warrant Shares subject to such exercise (based on the VWAP of the Common Stock on the date of the applicable Notice
of Exercise), $10 per Trading Day (increasing to $20 per Trading Day on the third Trading Day after the Warrant Share Delivery Date)
for each Trading Day after such Warrant Share Delivery Date until such Warrant Shares are delivered or Holder rescinds such exercise.
The Company agrees to maintain a transfer agent that is a participant in the FAST program so long as this Warrant remains outstanding
and exercisable. As used herein, “Standard Settlement Period” means the standard settlement period, expressed in a
number of Trading Days, on the Company’s primary Trading Market with respect to the Common Stock as in effect on the date of delivery
of the Notice of Exercise. Notwithstanding the foregoing, with respect to any Notice(s) of Exercise delivered on or prior to 12:00
p.m. (New York City time) on the Initial Exercise Date, which may be delivered at any time after the time of execution of the Purchase
Agreement, the Company agrees to deliver the Warrant Shares subject to such notice(s) by 4:00 p.m. (New York City time) on
the Initial Exercise Date and the Initial Exercise Date shall be the Warrant Share Delivery Date for purposes hereunder, provided that
payment of the aggregate Exercise Price (other than in the case of a cashless exercise) is received by such Warrant Share Delivery Date.


 






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ii.            Delivery
of New Warrants Upon Exercise. If this Warrant shall have been exercised in part, the Company shall, at the request of a Holder and
upon surrender of this Warrant certificate, at the time of delivery of the Warrant Shares, deliver to the Holder a new Warrant evidencing
the rights of the Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which new Warrant shall in all other
respects be identical with this Warrant.


 


iii.            Rescission
Rights. If the Company fails to cause the Transfer Agent to transmit to the Holder the Warrant Shares pursuant to Section 2(d)(i) by
the Warrant Share Delivery Date, then the Holder will have the right to rescind such exercise.


 


iv.           Compensation
for Buy-In on Failure to Timely Deliver Warrant Shares Upon Exercise. In addition to any other rights available to the Holder, if
the Company fails to cause the Transfer Agent to transmit to the Holder the Warrant Shares in accordance with the provisions of Section 2(d)(i) above
pursuant to an exercise on or before the Warrant Share Delivery Date, and if after such date the Holder is required by its broker to
purchase (in an open market transaction or otherwise) or the Holder’s brokerage firm otherwise purchases, shares of Common Stock
to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise (a
 “Buy-In”), then the Company shall (A) pay in cash to the Holder the amount, if any, by which (x) the Holder’s
total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased exceeds (y) the amount
obtained by multiplying (1) the number of Warrant Shares that the Company was required to deliver to the Holder in connection with
the exercise at issue times (2) the price at which the sell order giving rise to such purchase obligation was executed, and (B) at
the option of the Holder, either reinstate the portion of the Warrant and equivalent number of Warrant Shares for which such exercise
was not honored (in which case such exercise shall be deemed rescinded) or deliver to the Holder the number of shares of Common Stock
that would have been issued had the Company timely complied with its exercise and delivery obligations hereunder. For example, if the
Holder purchases Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to an attempted exercise of shares
of Common Stock with an aggregate sale price giving rise to such purchase obligation of $10,000, under clause (A) of the immediately
preceding sentence the Company shall be required to pay the Holder $1,000. The Holder shall provide the Company written notice indicating
the amounts payable to the Holder in respect of the Buy-In and, upon request of the Company, evidence of the amount of such loss. Nothing
herein shall limit a Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including, without
limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver shares
of Common Stock upon exercise of the Warrant as required pursuant to the terms hereof.


 






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v.            No
Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this
Warrant. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such exercise, the Company shall,
at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the
Exercise Price or round up to the next whole share.


 


vi.           Charges,
Taxes and Expenses. Issuance of Warrant Shares shall be made without charge to the Holder for any issue or transfer tax or other
incidental expense in respect of the issuance of such Warrant Shares, all of which taxes and expenses shall be paid by the Company, and
such Warrant Shares shall be issued in the name of the Holder or in such name or names as may be directed by the Holder; provided,
however, that, in the event that Warrant Shares are to be issued in a name other than the name of the Holder, this Warrant when
surrendered for exercise shall be accompanied by the Assignment Form attached hereto duly executed by the Holder and the Company
may require, as a condition thereto, the payment of a sum sufficient to reimburse it for any transfer tax incidental thereto. The Company
shall pay all Transfer Agent fees required for same-day processing of any Notice of Exercise and all fees to the Depository Trust Company
(or another established clearing corporation performing similar functions) required for same-day electronic delivery of the Warrant Shares.


 


vii.          Closing
of Books. The Company will not close its stockholder books or records in any manner which prevents the timely exercise of this Warrant,
pursuant to the terms hereof.


 


		e)	Holder’s Exercise Limitations.
                                            The Company shall not effect any exercise of this Warrant, and a Holder shall not have the
                                            right to exercise any portion of this Warrant, pursuant to Section 2 or otherwise, to
                                            the extent that after giving effect to such issuance after exercise as set forth on the applicable
                                            Notice of Exercise, the Holder (together with the Holder’s Affiliates, and any other
                                            Persons acting as a group together with the Holder or any of the Holder’s Affiliates
                                            (such Persons, “Attribution Parties”)), would beneficially own in excess
                                            of the Beneficial Ownership Limitation (as defined below).  For purposes of the foregoing
                                            sentence, the number of shares of Common Stock beneficially owned by the Holder and its Affiliates
                                            and Attribution Parties shall include the number of shares of Common Stock issuable upon
                                            exercise of this Warrant with respect to which such determination is being made, but shall
                                            exclude the number of shares of Common Stock which would be issuable upon (i) exercise
                                            of the remaining, nonexercised portion of this Warrant beneficially owned by the Holder or
                                            any of its Affiliates or Attribution Parties and (ii) exercise or conversion of the
                                            unexercised or nonconverted portion of any other securities of the Company (including, without
                                            limitation, any other Common Stock Equivalents) subject to a limitation on conversion or
                                            exercise analogous to the limitation contained herein beneficially owned by the Holder or
                                            any of its Affiliates or Attribution Parties.  Except as set forth in the preceding
                                            sentence, for purposes of this Section 2(e), beneficial ownership shall be calculated
                                            in accordance with Section 13(d) of the Exchange Act and the rules and regulations
                                            promulgated thereunder, it being acknowledged by the Holder that the Company is not representing
                                            to the Holder that such calculation is in compliance with Section 13(d) of the
                                            Exchange Act and the Holder is solely responsible for any schedules required to be filed
                                            in accordance therewith. To the extent that the limitation contained in this Section 2(e) applies,
                                            the determination of whether this Warrant is exercisable (in relation to other securities
                                            owned by the Holder together with any Affiliates and Attribution Parties) and of which portion
                                            of this Warrant is exercisable shall be in the sole discretion of the Holder, and the submission
                                            of a Notice of Exercise shall be deemed to be the Holder’s determination of whether
                                            this Warrant is exercisable (in relation to other securities owned by the Holder together
                                            with any Affiliates and Attribution Parties) and of which portion of this Warrant is exercisable,
                                            in each case subject to the Beneficial Ownership Limitation, and the Company shall have no
                                            obligation to verify or confirm the accuracy of such determination. In addition, a determination
                                            as to any group status as contemplated above shall be determined in accordance with Section 13(d) of
                                            the Exchange Act and the rules and regulations promulgated thereunder. For purposes
                                            of this Section 2(e), in determining the number of outstanding shares of Common Stock,
                                            a Holder may rely on the number of outstanding shares of Common Stock as reflected in (A) the
                                            Company’s most recent periodic or annual report filed with the Commission, as the case
                                            may be, (B) a more recent public announcement by the Company or (C) a more recent
                                            written notice by the Company or the Transfer Agent setting forth the number of shares of
                                            Common Stock outstanding.  Upon the written or oral request of a Holder, the Company
                                            shall within one Trading Day confirm orally and in writing to the Holder the number of shares
                                            of Common Stock then outstanding.  In any case, the number of outstanding shares of
                                            Common Stock shall be determined after giving effect to the conversion or exercise of securities
                                            of the Company, including this Warrant, by the Holder or its Affiliates or Attribution Parties
                                            since the date as of which such number of outstanding shares of Common Stock was reported.
                                            The “Beneficial Ownership Limitation” shall be [9.99/4.99%] of the number
                                            of shares of the Common Stock outstanding immediately after giving effect to the issuance
                                            of shares of Common Stock issuable upon exercise of this Warrant. The Holder, upon notice
                                            to the Company, may increase or decrease the Beneficial Ownership Limitation provisions of
                                            this Section 2(e), provided that the Beneficial Ownership Limitation in no event exceeds
                                            9.99% of the number of shares of the Common Stock outstanding immediately after giving effect
                                            to the issuance of shares of Common Stock upon exercise of this Warrant held by the Holder
                                            and the provisions of this Section 2(e) shall continue to apply. Any increase in
                                            the Beneficial Ownership Limitation will not be effective until the 61st day after
                                            such notice is delivered to the Company. The provisions of this Section 2(e) shall
                                            be construed and implemented in a manner otherwise than in strict conformity with the terms
                                            of this Section 2(e) to correct this Section 2(e) (or any portion hereof)
                                            which may be defective or inconsistent with the intended Beneficial Ownership Limitation
                                            herein contained or to make changes or supplements necessary or desirable to properly give
                                            effect to such limitation. The limitations contained in this Section 2(e) shall
                                            apply to a successor holder of this Warrant.



 






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Section 3.              Certain
Adjustments.


 


a)            Stock
Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (i) pays a stock dividend or otherwise
makes a distribution or distributions on shares of its Common Stock or any other equity or equity equivalent securities payable in shares
of Common Stock (which, for avoidance of doubt, shall not include any shares of Common Stock issued by the Company upon exercise of this
Warrant), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way
of reverse stock split) outstanding shares of Common Stock into a smaller number of shares, or (iv) issues by reclassification of
shares of the Common Stock any shares of capital stock of the Company, then in each case the Exercise Price shall be multiplied by a
fraction of which the numerator shall be the number of shares of Common Stock (excluding treasury shares, if any) outstanding immediately
before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event,
and the number of shares issuable upon exercise of this Warrant shall be proportionately adjusted such that the aggregate Exercise Price
of this Warrant shall remain unchanged. Any adjustment made pursuant to this Section 3(a) shall become effective immediately
after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective
immediately after the effective date in the case of a subdivision, combination or re-classification.


 


b)           Subsequent
Rights Offerings. In addition to any adjustments pursuant to Section 3(a) above, if at any time the Company grants, issues
or sells any Common Stock Equivalents or rights to purchase stock, warrants, securities or other property pro rata to the record holders
of any class of shares of Common Stock (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 Common Stock acquirable upon complete exercise of this Warrant (without regard to any limitations on exercise
hereof, including without limitation, the Beneficial Ownership Limitation) 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 Common Stock are to be determined for the grant, issue or sale of such Purchase Rights (provided, however, that, to
the extent that the Holder’s right to participate in any such Purchase Right would result in the Holder exceeding the Beneficial
Ownership Limitation, then the Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership
of such shares of Common Stock as a result of such Purchase Right to such extent) and such Purchase Right to such extent shall be held
in abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership
Limitation).


 


c)           Pro
Rata Distributions. During such time as this Warrant is outstanding, 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 Common Stock, 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 Common Stock acquirable upon complete
exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation, the Beneficial Ownership
Limitation) immediately before the date of 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 Common Stock are to be determined for the participation in such Distribution (provided,
however, that, to the extent that the Holder's right to participate in any such Distribution would result in the Holder exceeding
the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Distribution to such extent (or in
the beneficial ownership of any shares of Common Stock as a result of such Distribution to such extent) and the portion of such Distribution
shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would not result in the Holder
exceeding the Beneficial Ownership Limitation).


 






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d)           Fundamental
Transaction. If, at any time while this Warrant is outstanding, (i) the Company, directly or indirectly, in one or more related
transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company or any Subsidiary,
directly or indirectly, effects any sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially
all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange
offer (whether by the Company or another Person) is completed pursuant to which holders of Common Stock are permitted to sell, tender
or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of the outstanding
Common Stock or 50% or more of the voting power of the common equity of the Company, (iv) the Company, directly or indirectly, in
one or more related transactions effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory
share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities, cash or property,
or (v) the Company, directly or indirectly, in one or more related transactions consummates a stock or share purchase agreement
or other business combination (including, without limitation, a reorganization, recapitalization, spin-off, merger or scheme of arrangement)
with another Person or group of Persons whereby such other Person or group acquires 50% or more of the outstanding shares of Common Stock
or 50% or more of the voting power of the common equity of the Company (each a “Fundamental Transaction”), then, upon
any subsequent exercise of this Warrant, the Holder shall have the right to receive, for each Warrant Share that would have been issuable
upon such exercise immediately prior to the occurrence of such Fundamental Transaction, at the option of the Holder (without regard to
any limitation in Section 2(e) on the exercise of this Warrant), the number of shares of Common Stock of the successor or acquiring
corporation or of the Company, if it is the surviving corporation, and any additional consideration (the “Alternate Consideration”)
receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which this Warrant is
exercisable immediately prior to such Fundamental Transaction (without regard to any limitation in Section 2(e) on the exercise
of this Warrant). For purposes of any such exercise, the determination of the Exercise Price shall be appropriately adjusted to apply
to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such
Fundamental Transaction, and the Company shall apportion the Exercise Price among the Alternate Consideration in a reasonable manner
reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock are given any choice
as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder shall be given the same choice as
to the Alternate Consideration it receives upon any exercise of this Warrant following such Fundamental Transaction. Notwithstanding
anything to the contrary, in the event of a Fundamental Transaction, the Company or any Successor Entity (as defined below) shall, at
the Holder’s option, exercisable at any time concurrently with, or within 30 days after, the consummation of the Fundamental Transaction
(or, if later, the date of the public announcement of the applicable Fundamental Transaction), purchase this Warrant from the Holder
by paying to the Holder an amount of cash equal to the Black Scholes Value (as defined below) of the remaining unexercised portion of
this Warrant on the date of the consummation of such Fundamental Transaction; provided, however, that, if the Fundamental
Transaction is not within the Company's control, including not approved by the Company's Board of Directors, the Holder shall only be
entitled to receive from the Company or any Successor Entity the same type or form of consideration (and in the same proportion), at
the Black Scholes Value of the unexercised portion of this Warrant, that is being offered and paid to the holders of Common Stock of
the Company in connection with the Fundamental Transaction, whether that consideration be in the form of cash, stock or any combination
thereof, or whether the holders of Common Stock are given the choice to receive from among alternative forms of consideration in connection
with the Fundamental Transaction; provided, further, that if holders of Common Stock of the Company are not offered or
paid any consideration in such Fundamental Transaction, such holders of Common Stock will be deemed to have received common stock of
the Successor Entity (which Entity may be the Company following such Fundamental Transaction) in such Fundamental Transaction. “Black
Scholes Value” means the value of this Warrant based on the Black-Scholes Option Pricing Model obtained from the “OV”
function on Bloomberg determined as of the day of consummation of the applicable Fundamental Transaction for pricing purposes and reflecting
(A) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the time between the date of the public
announcement of the applicable contemplated Fundamental Transaction and the Termination Date, (B) an expected volatility equal to
the greater of 100% and the 100 day volatility obtained from the HVT function on Bloomberg (determined utilizing a 365 day annualization
factor) as of the Trading Day immediately following the public announcement of the applicable contemplated Fundamental Transaction, (C) the
underlying price per share used in such calculation shall be the greater of (i) the sum of the price per share being offered in
cash, if any, plus the value of any non-cash consideration, if any, being offered in such Fundamental Transaction and (ii) the highest
VWAP during the period beginning on the Trading Day immediately preceding the public announcement of the applicable contemplated Fundamental
Transaction (or the consummation of the applicable Fundamental Transaction, if earlier) and ending on the Trading Day of the Holder’s
request pursuant to this Section 3(d) and (D) a remaining option time equal to the time between the date of the public
announcement of the applicable contemplated Fundamental Transaction and the Termination Date and (E) a zero cost of borrow. The
payment of the Black Scholes Value will be made by wire transfer of immediately available funds (or such other consideration) within
the later of (i) five Business Days of the Holder’s election and (ii) the date of consummation of the Fundamental Transaction.
The Company shall cause any successor entity in a Fundamental Transaction in which the Company is not the survivor (the “Successor
Entity”) to assume in writing all of the obligations of the Company under this Warrant and the other Transaction Documents
in accordance with the provisions of this Section 3(d) pursuant to written agreements in form and substance reasonably satisfactory
to the Holder and approved by the Holder (without unreasonable delay) prior to such Fundamental Transaction and shall, at the option
of the Holder, 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 which is exercisable for a corresponding number of shares of capital stock
of such Successor Entity (or its parent entity) equivalent to the shares of Common Stock 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 Common Stock pursuant to such Fundamental Transaction and the value of such shares of capital stock, such 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 which is reasonably satisfactory in form and substance to the Holder. Upon the occurrence of any
such Fundamental Transaction, the Successor Entity shall be added to the term “Company” under this Warrant (so that from
and after the occurrence or consummation of such Fundamental Transaction, each and every provision of this Warrant and the other Transaction
Documents referring to the “Company” shall refer instead to each of the Company and the Successor Entity or Successor Entities,
jointly and severally), and the Successor Entity or Successor Entities, jointly and severally with the Company, may exercise every right
and power of the Company prior thereto and the Successor Entity or Successor Entities shall assume all of the obligations of the Company
prior thereto under this Warrant and the other Transaction Documents with the same effect as if the Company and such Successor Entity
or Successor Entities, jointly and severally, had been named as the Company herein.


 






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e)            Calculations.
All calculations under this Section 3 shall be made to the nearest cent or the nearest 1/100th of a share, as the case may be. For
purposes of this Section 3, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be
the sum of the number of shares of Common Stock (excluding treasury shares, if any) issued and outstanding.


 


f)            Notice
to Holder.


 


i.             Adjustment
to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of this Section 3, the Company shall promptly
deliver to the Holder by email a notice setting forth the Exercise Price after such adjustment and any resulting adjustment to the number
of Warrant Shares and setting forth a brief statement of the facts requiring such adjustment.


 


ii.            Notice
to Allow Exercise by Holder. If (A) the Company shall declare a dividend (or any other distribution in whatever form) on the
Common Stock, (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the Common Stock, (C) the
Company shall authorize the granting to all holders of the Common Stock rights or warrants to subscribe for or purchase any shares of
capital stock of any class or of any rights, (D) the approval of any stockholders of the Company shall be required in connection
with any reclassification of the Common Stock, any consolidation or merger to which the Company (or any of its Subsidiaries) is a party,
any sale or transfer of all or substantially all of its assets, or any compulsory share exchange whereby the Common Stock is converted
into other securities, cash or property, or (E) the Company shall authorize the voluntary or involuntary dissolution, liquidation
or winding up of the affairs of the Company, then, in each case, the Company shall cause to be delivered by email to the Holder at its
last email address as it shall appear upon the Warrant Register of the Company, at least 20 calendar days prior to the applicable record
or effective date hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of such
dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the holders of the Common
Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date
on which such reclassification, consolidation, merger, sale, transfer or share exchange is expected to become effective or close, and
the date as of which it is expected that holders of the Common Stock of record shall be entitled to exchange their shares of the Common
Stock for securities, cash or other property deliverable upon such reclassification, consolidation, merger, sale, transfer or share exchange;
provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the
corporate action required to be specified in such notice. To the extent that any notice provided in this Warrant constitutes, or contains,
material, non-public information regarding the Company or any of the Subsidiaries, the Company shall simultaneously file such notice
with the Commission pursuant to a Current Report on Form 8-K. The Holder shall remain entitled to exercise this Warrant during the
period commencing on the date of such notice to the effective date of the event triggering such notice except as may otherwise be expressly
set forth herein.


 






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Section 4.             Transfer
of Warrant.


 


a)           Transferability.
This Warrant and all rights hereunder (including, without limitation, any registration rights) are transferable, in whole or in part,
upon surrender of this Warrant at the principal office of the Company or its designated agent, together with a written assignment of
this Warrant substantially in the form attached hereto duly executed by the Holder or its agent or attorney and funds sufficient to pay
any transfer taxes payable upon the making of such transfer. Upon such surrender and, if required, such payment, the Company shall execute
and deliver a new Warrant or Warrants in the name of the assignee or assignees, as applicable, and in the denomination or denominations
specified in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant not
so assigned, and this Warrant shall promptly be cancelled. Notwithstanding anything herein to the contrary, the Holder shall not be required
to physically surrender this Warrant to the Company unless the Holder has assigned this Warrant in full, in which case, the Holder shall
surrender this Warrant to the Company within three (3) Trading Days of the date on which the Holder delivers an assignment form
to the Company assigning this Warrant in full. The Warrant, if properly assigned in accordance herewith, may be exercised by a new holder
for the purchase of Warrant Shares without having a new Warrant issued.


 


b)           New
Warrants. This Warrant may be divided or combined with other Warrants upon presentation hereof at the aforesaid office of the Company,
together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the Holder or
its agent or attorney. Subject to compliance with Section 4(a), as to any transfer which may be involved in such division or combination,
the Company shall execute and deliver a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided or combined in
accordance with such notice. All Warrants issued on transfers or exchanges shall be dated the initial issuance date of this Warrant and
shall be identical with this Warrant except as to the number of Warrant Shares issuable pursuant thereto.


 


c)            Warrant
Register. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose (the “Warrant
Register”), in the name of the record Holder hereof from time to time. The Company may deem and treat the registered Holder
of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all other
purposes, absent actual notice to the contrary.


 


Section 5.             Miscellaneous.


 


a)           No
Rights as Stockholder Until Exercise; No Settlement in Cash. This Warrant does not entitle the Holder to any voting rights, dividends
or other rights as a stockholder of the Company prior to the exercise hereof as set forth in Section 2(d)(i), except as expressly
set forth in Section 3. Without limiting any rights of a Holder to receive Warrant Shares on a “cashless exercise” pursuant
to Section 2(c) or to receive cash payments pursuant to Section 2(d)(i) and Section 2(d)(iv) herein, in
no event shall the Company be required to net cash settle an exercise of this Warrant.


 


b)           Loss,
Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably satisfactory
to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to the Warrant Shares, and in case
of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case of the Warrant, shall not include
the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make
and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation, in lieu of such Warrant or stock certificate.


 






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c)           Saturdays,
Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required or
granted herein shall not be a Business Day, then such action may be taken or such right may be exercised on the next succeeding Business
Day.


 


d)           Authorized
Shares.


 


The Company covenants
that, during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a sufficient number
of shares to provide for the issuance of the Warrant Shares upon the exercise of any purchase rights under this Warrant. The Company
further covenants that its issuance of this Warrant shall constitute full authority to its officers who are charged with the duty of
issuing the necessary Warrant Shares upon the exercise of the purchase rights under this Warrant. The Company will take all such reasonable
action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law
or regulation, or of any requirements of the Trading Market upon which the Common Stock may be listed. The Company covenants that all
Warrant Shares which may be issued upon the exercise of the purchase rights represented by this Warrant will, upon exercise of the purchase
rights represented by this Warrant and payment for such Warrant Shares in accordance herewith, be duly authorized, validly issued, fully
paid and nonassessable and free from all taxes, liens and charges created by the Company in respect of the issue thereof (other than
taxes in respect of any transfer occurring contemporaneously with such issue).


 


Except and to the
extent as waived or consented to by the Holder, the Company shall not by any action, including, without limitation, amending its certificate
of incorporation or through any reorganization, transfer of assets, consolidation, merger, 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, but will at all
times in good faith assist in the carrying out of all such terms and in the taking of all such actions as may be necessary or appropriate
to protect the rights of Holder as set forth in this Warrant against impairment. Without limiting the generality of the foregoing, the
Company will (i) not increase the par value of any Warrant Shares above the amount payable therefor upon such exercise immediately
prior to such increase in par value, (ii) take all such action as may be necessary or appropriate in order that the Company may
validly and legally issue fully paid and nonassessable Warrant Shares upon the exercise of this Warrant and (iii) use commercially
reasonable efforts to obtain all such authorizations, exemptions or consents from any public regulatory body having jurisdiction thereof,
as may be, necessary to enable the Company to perform its obligations under this Warrant.


 


Before taking any
action which would result in an adjustment in the number of Warrant Shares for which this Warrant is exercisable or in the Exercise Price,
the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as may be necessary from any public regulatory
body or bodies having jurisdiction thereof.


 






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e)            Governing
Law. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed by and
construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflicts of
law thereof. Each party agrees that all legal proceedings concerning the interpretations, enforcement and defense of the transactions
contemplated by this Warrant (whether brought against a party hereto or their respective affiliates, directors, officers, shareholders,
partners, members, employees or agents) shall be commenced exclusively in the state and federal courts sitting in the City of New York.
Each party 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 improper or is an inconvenient
venue for such proceeding. Each party hereby irrevocably waives personal service of process and consents to process being served in any
such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery)
to such party at the address in effect for notices to it under this Warrant and agrees that such service shall constitute good and sufficient
service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any
other manner permitted by law. If either party shall commence an action, suit or proceeding to enforce any provisions of this Warrant,
the prevailing party in such action, suit or proceeding shall be reimbursed by the other party for their reasonable attorneys’
fees and other costs and expenses incurred with the investigation, preparation and prosecution of such action or proceeding.


 


f)            Restrictions.
The Holder acknowledges that the Warrant Shares acquired upon the exercise of this Warrant, if not registered, and the Holder does not
utilize cashless exercise, will have restrictions upon resale imposed by state and federal securities laws.


 


g)            Nonwaiver
and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder shall operate as
a waiver of such right or otherwise prejudice the Holder’s rights, powers or remedies. Without limiting any other provision of
this Warrant, if the Company willfully and knowingly fails to comply with any provision of this Warrant, which results in any material
damages to the Holder, the Company shall pay to the Holder such amounts as shall be sufficient to cover any costs and expenses including,
but not limited to, reasonable attorneys’ fees, including those of appellate proceedings, incurred by the Holder in collecting
any amounts due pursuant hereto or in otherwise enforcing any of its rights, powers or remedies hereunder.


 


h)            Notices.
Any and all notices or other communications or deliveries to be provided by the holders hereunder including, without limitation, any
Notice of Exercise, shall be in writing and delivered personally, by e-mail, or sent by a nationally recognized overnight courier service,
addressed to the Company, at 95 Sawyer Road, Suite 110, Waltham, MA 02453, Attention: James Oliviero, email address: jfo@checkpointtx.com,
or such other number, email address or address as the Company may specify for such purposes by notice to the holders. Any and all notices
or other communications or deliveries to be provided by the Company hereunder shall be in writing and delivered personally, by e-mail,
or sent by a nationally recognized overnight courier service addressed to each Holder at the facsimile number, e-mail address or address
of such Holder appearing on the books of the Company. Any notice or other communication or deliveries hereunder shall be deemed given
and effective on the earliest of (i) the time of transmission, if such notice or communication is delivered via e-mail at the e-mail
address set forth in this Section prior to 5:30 p.m. (New York City time) on any date, (ii) the next Trading Day after
the time of transmission, if such notice or communication is delivered via e-mail at the e-mail address set forth in this Section on
a day that is not a Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the second Trading Day
following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (iv) upon actual receipt by the
party to whom such notice is required to be given. To the extent that any notice provided hereunder constitutes, or contains, material,
non-public information regarding the Company or any subsidiaries, the Company shall simultaneously file such notice with the Commission
pursuant to a Current Report on Form 8-K.


 






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i)            Limitation
of Liability. No provision hereof, in the absence of any affirmative action by the Holder to exercise this Warrant to purchase Warrant
Shares, and no enumeration herein of the rights or privileges of the Holder, shall give rise to any liability of the Holder for the purchase
price of any Common Stock or as a stockholder of the Company, whether such liability is asserted by the Company or by creditors of the
Company.


 


j)            Remedies.
The Holder, in addition to being entitled to exercise all rights granted by law, including recovery of damages, will be entitled to specific
performance of its rights under this Warrant. The Company agrees that monetary damages would not be adequate compensation for any loss
incurred by reason of a breach by it of the provisions of this Warrant and hereby agrees to waive and not to assert the defense in any
action for specific performance that a remedy at law would be adequate.


 


k)            Successors
and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced hereby shall inure to the
benefit of and be binding upon the successors and permitted assigns of the Company and the successors and permitted assigns of Holder.
The provisions of this Warrant are intended to be for the benefit of any Holder from time to time of this Warrant and shall be enforceable
by the Holder or holder of Warrant Shares.


 


l)            Amendment.
This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company and the Holder.


 


m)            Severability.
Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the
extent of such prohibition or invalidity, without invalidating the remainder of such provisions or the remaining provisions of this Warrant.


 






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n)            Headings.
The headings used in this Warrant are for the convenience of reference only and shall not, for any purpose, be deemed a part of this
Warrant.


 


o)            Execution.
This Warrant may be executed and delivered by e-mail delivery of a “.pdf” or similar format data file, in which case such
signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the
same force and effect as if such “.pdf” or similar format signature page were an original thereof.


 


********************


 


(Signature Page Follows)


 






    14


     


    

 


IN WITNESS WHEREOF, the Company
has caused this Warrant to be executed by its officer thereunto duly authorized as of the date first above indicated.


 


	 	Checkpoint
    Therapeutics, Inc.
	 	 
	 	 
	 	By:	 
	 	 	Name: James Oliviero
	 	 	Title: Chief Executive Officer and President





 






    15


     


    

 


NOTICE OF EXERCISE


 


To:         Checkpoint
Therapeutics, Inc.


 


(1)            The
undersigned hereby elects to purchase ________ Warrant Shares of the Company pursuant to the terms of the attached Warrant (only if exercised
in full), and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any.


 


(2)            Payment
shall take the form of (check applicable box):


 


 ̈
in lawful money of the United States; or


 


 ̈
if permitted the cancellation of such number of Warrant Shares as is necessary, in accordance with the formula set forth in subsection
2(c), to exercise this Warrant with respect to the maximum number of Warrant Shares purchasable pursuant to the cashless exercise procedure
set forth in subsection 2(c).


 


(3)            Please
issue said Warrant Shares in the name of the undersigned or in such other name as is specified below:


 


_______________________________


 


The Warrant Shares shall be delivered to the
following DWAC Account Number:


 


_______________________________


 


_______________________________


 


_______________________________


 


[SIGNATURE
OF HOLDER]


 


	Name of Investing Entity:	 
	Signature of Authorized Signatory of Investing Entity:	 
	Name of Authorized Signatory:	 
	Title of Authorized Signatory:	 
	Date:	 





 






    


     


    

 







	 	EXHIBIT B





 


ASSIGNMENT FORM


 


(To assign the foregoing
Warrant, execute this form and supply required information. Do not use this form to purchase shares.)


 


FOR VALUE RECEIVED, the
foregoing Warrant and all rights evidenced thereby are hereby assigned to
  


 





	Name:	 
	 	(Please Print)
	 	 
	Address:	 
	 	(Please Print)
	 	 
	Phone Number:	 
	 	 
	Email Address:	 





 


Dated: _______________ __, ______


 


	Holder’s Signature:	 	 
	 	 	 
	Holder’s Address: