Exhibit 4.2


 


 


NEITHER THIS SECURITY NOR THE SECURITIES FOR
WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION
OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES
ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES
ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS. THIS SECURITY AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS SECURITY
MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES.


 


PRE-FUNDED
COMMON STOCK PURCHASE WARRANT


 


OPGEN,
INC.


 


	Warrant Shares: [_______]	Issue Date: November [__] 2020


 


THIS PRE-FUNDED 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 hereof (the “Initial Exercise Date”) until this Warrant is exercised
in full (the “Termination Date”) but not thereafter, to subscribe for and purchase from OpGen, Inc., a Delaware
corporation (the “Company”), up to [______] shares of common stock, par value $0.01 per share (the “Common
Stock”) (as subject to adjustment hereunder, the “Warrant Shares”). 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.
In addition to the terms defined elsewhere in this Warrant, the following terms have the meanings indicated in this Section 1:


 


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


 


“Business Day”
means any day except any Saturday, any Sunday, any day which is a federal legal holiday in the United States or any day on which
banking institutions in the State of New York are authorized or required by law or other governmental action to close.


 


“Commission”
means the United States Securities and Exchange Commission.


 


“Common Stock
Equivalents” means any securities of the Company, which would entitle the holder thereof to acquire at any time shares
of Common Stock, including, without limitation, any debt, preferred stock, right, option, warrant or other instrument that is at
any time convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock.


 


“Exchange Act”
means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.


 


“Person”
means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.


 


“Securities Act”
means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.


 






    	  





    	 



    

 


 


“Trading Day”
means a day on which the principal Trading Market is open for trading.


 


“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,
OTCQB or OTCQX (or any successors to any of the foregoing).


 


“Transfer Agent”
means Philadelphia Stock Transfer, Inc., the current transfer agent of the Company, with a mailing address of 2320 Haverford Rd.,
Suite 230, Ardmore, PA 19003, and any successor transfer agent of the Company.


 


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 facsimile
copy (or.pdf copy via 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
unpaid portion of 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.


 


b)       Exercise
Price. The aggregate exercise price of this Warrant, except for a nominal exercise price of $0.01 per Warrant Share, was pre-funded
to the Company on or prior to the Initial Exercise Date and, consequently, no additional consideration (other than the nominal
exercise price of $0.01 per Warrant Share) shall be required to be paid by the Holder to any Person to effect any exercise of this
Warrant. The Holder shall not be entitled to the return or refund of all, or any portion, of such pre-paid aggregate exercise price
under any circumstance or for any reason whatsoever, including in the event this Warrant shall not have been exercised prior to
the Termination Date. The remaining unpaid exercise price per Warrant Share shall be $0.01, subject to adjustment hereunder (the
“Exercise Price”).


 


c)       Cashless
Exercise. If at any time after the Initial Exercise Date, there is no effective registration statement registering, or no current
prospectus available for, the issuance of the Warrant Shares to the Holder, then this Warrant may only 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:


 






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(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)(64) 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) = $0.01, 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 L.P. (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 Sheets” published by OTC Markets Group, Inc. (or a similar organization or agency succeeding
to its functions of reporting prices), the most recent bid price per share of 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 L.P. (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 Sheets” published by OTC Markets Group, Inc. (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.


 


Notwithstanding anything herein to the contrary,
on the Termination Date, this Warrant shall be automatically exercised via cashless exercise pursuant 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 earlier of (i) two (2) Trading Days and (ii) 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 such liquidated damages begin to accrue) 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 by 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 Securities Purchase Agreement, dated as of November [   
], 2020, between the Company and the Holder (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.


 


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.


 






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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.


 






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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 (1) Trading Days 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
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 the shares of 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.


 






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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 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)       [RESERVED]


 


c)       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, 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).


 


d)       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, 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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e)       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, 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 shares 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 shares of Common Stock, (iv) the Company, directly or indirectly, in one or more related
transactions effects any reclassification, reorganization or recapitalization of the shares of Common Stock or any compulsory share
exchange pursuant to which the shares of Common Stock are 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 or scheme
of arrangement) with another Person or group of Persons whereby such other Person or group acquires more than 50% of the outstanding
shares of Common Stock (not including any shares of Common Stock held by the other Person or other Persons making or party to,
or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business
combination) (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 shares 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 in accordance
with the provisions of this Section 3(e) pursuant to written agreements in form and substance reasonably satisfactory
to the Holder 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 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 with the same effect as if such Successor Entity had been named as the Company herein.


 






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f)        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.


 


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 shares of Common Stock, (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the
shares of Common Stock, (C) the Company shall authorize the granting to all holders of the shares of Common Stock rights or
warrants to subscribe for or purchase any 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 shares of Common Stock, any consolidation or merger
to which the Company 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 shares of Common Stock are 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 5 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 shares
of 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 stock exchange is expected to become
effective or close, and the date as of which it is expected that holders of the shares of Common Stock of record shall be entitled
to exchange their shares of Common Stock for securities, cash or other property deliverable upon such reclassification, consolidation,
merger, sale, transfer or stock 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 and provided, further that
no notice shall be required if the information is disseminated in a press release or document filed with the Commission . To the
extent that any notice provided in this Warrant constitutes, or contains, material, non-public information regarding the Company,
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 Issue
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. 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.


 


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 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 shares of 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 shares of 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).


 






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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 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, stockholders,
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 Agreement 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, notwithstanding the fact that the Holder's
right to exercise this Warrant terminates on the Termination Date. 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 notice, request or other document required or permitted to be given or delivered to the Holder by the Company shall be delivered
in accordance with the notice provisions of the Purchase Agreement.


 


 






    	11  





    	 



    

 


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 shares of 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)


 




    	12  





    	 



    


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.


 


OPGEN, INC.


 


	 	 	 
	 	 	 
	By:	 	 
	Name:	 	 
	Title:	 	 


 


 


 


 


 




    	  





    	 



    


 


EXHIBIT A


 


NOTICE OF EXERCISE


 


TO: OPGEN, 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: