Exhibit 4.1


 


FORM OF WARRANT


 


COMMON STOCK PURCHASE WARRANT


 


SELLAS
Life Sciences Group, Inc.


 


	Warrant Shares: _______	Issue Date: April __, 2022


THIS 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 Issue
Date and on or prior to 5:00 p.m. (New York City time) on April [ ], 2027 (the “Termination Date”) but not thereafter,
to subscribe for and purchase from SELLAS Life Sciences Group, 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
Underwriting Agreement (the “Underwriting Agreement”), dated March 31, 2022, among the Company and SVB Securities LLC
and Cantor Fitzgerald & Co., as representatives of the underwriters named therein.


 


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 Issue Date and on or before the Termination Date by delivery to the Company of a duly executed facsimile copy or 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 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.


 


b) Exercise Price.
The exercise price per share of Common Stock under this Warrant shall be $[ ], 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. (“Bloomberg”) 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.


 


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).


 


“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 Purchasers 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.


 


“Trading
Market” means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date
in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock
Exchange, the OTCQB or the OTCQX (or any successors to any of the foregoing).


 


“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 in 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 Purchasers 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.


 






     


     


    

 


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 the 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 fifth 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.


 


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.


 


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 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 paragraph shall be construed and implemented in a manner otherwise than in
strict conformity with the terms of this Section 2(e) to correct this paragraph (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 paragraph shall apply to a successor holder of this Warrant.


 






     


     


    

 


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).


 






     


     


    

 


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 (and all of its Subsidiaries, taken as
a whole), 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 outstanding 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 outstanding 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. 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 succeed to, and
be substituted for (so that from and after the date of such 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. Notwithstanding the foregoing, in the event of a Change
of Control, that is approved by the Company's Board of Directors (and not for avoidance of doubt if the Change of Control is not within
the Company's control), the Holder shall be entitled to receive from the Company or any Successor Entity, as of the date of consummation
of such Change of Control, 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 Change of
Control, 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 Change of Control. As used herein, "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 immediately following the first public announcement of the applicable Change of Control,
or, if the Change of Control is not publicly announced, the date the Change of Control is consummated, for pricing purposes and reflecting
(i) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the remaining term of this Warrant as of such
date of request, (ii) an expected volatility equal to the lesser of (x) 100% and (y) the 30 day volatility obtained from the HVT function
on Bloomberg as of the Trading Day immediately following the public announcement of the applicable Change of Control, (iii) the underlying
price per share used in such calculation shall be the greater of (a) the highest Weighted Average Price during the five (5) Trading Days
prior to the closing of the Change of Control and (b) 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 Change of Control, (iv) a zero cost of borrow and (v) a 360 day annualization
factor. As used herein, "Change of Control" means any Fundamental Transaction other than (i) any reorganization, recapitalization
or reclassification of the Common Stock in which holders of the Company's voting power immediately prior to such reorganization, recapitalization
or reclassification continue after such reorganization, recapitalization or reclassification to hold publicly traded securities and, directly
or indirectly, are, in all material respects, the holders of the voting power of the surviving entity (or entities with the authority
or voting power to elect the members of the board of directors (or their equivalent if other than a corporation) of such entity or entities)
after such reorganization, recapitalization or reclassification, (ii) pursuant to a migratory merger effected solely for the purpose of
changing the jurisdiction of incorporation of the Company or (iii) a merger in connection with a bona fide acquisition by the Company
of any Person in which (x) the gross consideration paid, directly or indirectly, by the Company in such acquisition is not greater than
20% of the Company's market capitalization as calculated on the date of the consummation of such merger and (y) such merger does not contemplate
a change to the identity of a majority of the board of directors of the Company. Notwithstanding anything herein to the contrary, any
transaction or series of transactions that, directly or indirectly, results in the Company or the Successor Entity not having Common Stock
or common stock, as applicable, registered under the 1934 Act and listed on an Eligible Market shall be deemed a Change of Control. As
used herein, "Eligible Market" means The Nasdaq Capital Market, the NYSE American LLC, The Nasdaq Global Select Market, The
Nasdaq Global Market or The New York Stock Exchange, Inc.


 






     


     


    

 


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) Voluntary
Adjustment By Company. Subject to the rules and regulations of the Trading Market, the Company may at any time during the term of
this Warrant, subject to the prior written consent of the Holder, reduce the then current Exercise Price to any amount and for any period
of time deemed appropriate by the board of directors of the Company.


 


g) 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 facsimile or 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 (and all of its Subsidiaries, taken as a whole) is a party, any sale or
transfer of all or substantially all of the assets of the Company, 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 facsimile or email to the Holder at its
last facsimile number or 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.


 


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 original Issue Date 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.


 


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 Trading Day, then such action may be taken or such right may be exercised on the next succeeding Trading 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.


 


e) Jurisdiction.
All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be determined in accordance
with the provisions of the Underwriting Agreement.


 


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 or the Underwriting Agreement, 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 notices, consents, waivers or other document or communications required or permitted to be given or delivered under the terms of this
Warrant must be in writing and will be deemed to have been delivered: (i) upon receipt, if delivered personally; (ii) when sent,
if sent by facsimile (provided confirmation of transmission is mechanically or electronically generated and kept on file by the sending
party); (iii) when sent, if sent by e-mail (provided that such sent e-mail is kept on file (whether electronically
or otherwise) by the sending party and the sending party does not receive an automatically generated message from the recipient’s
e-mail server that such e-mail could not be delivered to such recipient) and (iv) if sent by overnight courier service, one (1) Trading
Day after deposit with an overnight courier service with next day delivery specified, in each case, properly addressed to the party to
receive the same. If notice is given by facsimile or email, a copy of such notice shall be dispatched no later than the next business
day by first class mail, postage prepaid. The addresses, facsimile numbers and e-mail addresses for such communications shall be:


 


	If to the Company:
	 
	
    SELLAS Life Sciences Group, Inc.

    7 Times Square, Suite 2503

    New York, NY 10036

	Attention: Angelos M. Stergiou, MD, ScD h.c.
	President and Chief Executive Officer 
	Email: []
	 
	With a copy (for informational purposes only) to:
	 
	Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
	666 Third Avenue
	New York, NY 10016
	E-mail: dabagliebter@mintz.com
	Attention: Daniel Bagliebter, Esq.


 


If to a Holder, to its address,
facsimile number or e-mail address set forth herein or on the books and records of the Company.


 


Or, in each
of the above instances, to such other address, facsimile number or e-mail address and/or to the attention of such other Person
as the recipient party has specified by written notice given to each other party at least five (5) days prior to the effectiveness
of such change. Written confirmation of receipt (A) given by the recipient of such notice, consent, waiver or other communication,
(B) mechanically or electronically generated by the sender’s facsimile machine containing the time, date and recipient facsimile
number or (C) provided by an overnight courier service shall be rebuttable evidence of personal service, receipt by facsimile or
receipt from an overnight courier service in accordance with clause (i), (ii) or (iv) above, respectively. A copy of the e-mail transmission
containing the time, date and recipient e- mail address shall be rebuttable evidence of receipt by e-mail in accordance
with clause (iii) above.


 






     


     


    

 


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.


 


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.


 


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


 


(Signature Page Follows)


 


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.


 


	SELLAS Life Sciences Group, Inc.
	 
	By:	 
	 	Name: Angelos M. Stergiou
	 	Title: President and Chief Executive Officer





 






     


     


    

 


NOTICE OF EXERCISE


 


	To:	SELLAS Life Sciences Group, 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: 	 





 






     


     


    

 


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: