Exhibit
4.1


 


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.


 


COMMON
STOCK PURCHASE WARRANT


 


Pulmatrix,
Inc.


 


	Warrant Shares:
_______		Issue
Date:______, 2020
	 	 	 
	 	 	Initial
Exercise Date: _______, 2020



 


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 date set forth above (the “Initial Exercise Date”) and on or prior to
5:00 p.m. (New York City time) on ______________1 (the “Termination Date”) but not thereafter,
to subscribe for and purchase from Pulmatrix, Inc., a Delaware corporation (the “Company”), up to ______ shares
(as subject to adjustment hereunder, the “Warrant Shares”) of the Company’s 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. 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.


 







 



1
Insert the date that is the five (5) year anniversary of the Initial Exercise Date, provided that, if such date is not a
Trading Day, insert the immediately following Trading Day.


 




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“Business
Day” means any day other than Saturday, Sunday, any day which is a federal legal holiday in the United States, or other
day on which commercial banks in The City of New York are authorized or required by law to remain closed; provided, however, for
clarification, commercial banks shall not be deemed to be authorized or required by law to remain closed due to “stay at
home”, “shelter-in-place”, “non-essential employee” or any other similar orders or restrictions
or the closure of any physical branch locations at the direction of any governmental authority so long as the electronic funds
transfer systems (including for wire transfers) of commercial banks in The City of New York are generally are open for use by
customers on such day.


 


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


 


“Common
Stock” means the common stock of the Company, par value $0.0001 per share, and any other class of securities into which
such securities may hereafter be reclassified or changed.


 


“Common
Stock Equivalents” means any securities of the Company or the Subsidiaries which would entitle the holder thereof to
acquire at any time 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.


 


“Letter
Agreement” means that certain letter agreement between the initial Holder hereof and the Company, dated as of July [__],
2020, pursuant to which such initial Holder agreed to exercise one or more warrants to purchase shares of Common Stock and the
Company agreed to issue to the initial Holder this Warrant.


 


“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.


 


“Rule
144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended or interpreted
from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same purpose
and effect as such Rule.


 


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


 


“Subsidiary”
means the subsidiaries of the Company set forth on Exhibit 21.1 to the Company’s Annual Report on Form 10-K for the year
ended December 31, 2019 and shall, where applicable, also include any direct or indirect subsidiary of the Company formed or acquired
after the date hereof.


 




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“Trading
Day” means a day on which the Common Stock is traded on a Trading Market.


 


“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,
or the New York Stock Exchange (or any successors to any of the foregoing).


 


“Transfer
Agent” means Vstock Transfer, LLC, the current transfer agent of the Company, with a mailing address of 18 Lafayette
Place, Woodmere, NY 11598, and any successor transfer agent of the Company.


 


“Warrants”
means this Warrant and other Common Stock purchase warrants issued by the Company pursuant to the Letter Agreement.


 


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 submitted by e-mail (or e-mail attachment) of the Notice of Exercise in the form
annexed hereto (the “Notice of Exercise”). Within the earlier of (i) two (2) Trading Days and (ii) the
number of Trading Days comprising the Standard Settlement Period (as defined in Section 2(d)(i) herein) following the date of
exercise as aforesaid, the Holder shall deliver the aggregate Exercise Price for the Warrant Shares specified in the
applicable Notice of Exercise by wire transfer or cashier’s check drawn on a United States bank unless the cashless
exercise procedure specified in Section 2(c) below is specified in the applicable Notice of Exercise. No ink-original Notice
of Exercise shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice
of Exercise be required. Notwithstanding anything herein to the contrary, the Holder shall not be required to physically
surrender this Warrant to the Company until the Holder has purchased all of the Warrant Shares available hereunder and the
Warrant has been exercised in full, in which case, the Holder shall surrender this Warrant to the Company for cancellation
within three (3) Trading Days of the date on which the final Notice of Exercise is delivered to the Company. Partial
exercises of this Warrant resulting in purchases of a portion of the total number of Warrant Shares available hereunder shall
have the effect of lowering the outstanding number of Warrant Shares purchasable hereunder in an amount equal to the
applicable number of Warrant Shares purchased. The Holder and the Company shall maintain records showing the number of
Warrant Shares purchased and the date of such purchases. The Company shall deliver any objection to any Notice of Exercise
within one (1) Trading 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.


 




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b)
Exercise Price. The exercise price per share of Common Stock under this Warrant shall be $1.80, 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 resale of the Warrant Shares by 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)(68) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, (ii)
    at the option of the Holder, either (y) the VWAP on the Trading Day immediately preceding the date of the applicable Notice
    of Exercise or (z) the Bid Price of the Common Stock on the principal Trading Market as reported by Bloomberg L.P. as of the
    time of the Holder’s execution of the applicable Notice of Exercise if such Notice of Exercise is executed during “regular
    trading hours” on a Trading Day and is delivered within two (2) hours thereafter (including until two (2) hours after
    the close of “regular trading hours” on a Trading Day) pursuant to Section 2(a) hereof or (iii) the VWAP on the
    date of the applicable Notice of Exercise if the date of such Notice of Exercise is a Trading Day and such Notice of Exercise
    is both executed and delivered pursuant to Section 2(a) hereof after the close of “regular trading hours” on such
    Trading Day;
	 	 	 	 
	 	(B)	=	the
    Exercise Price of this Warrant, as adjusted hereunder; and
	 	 	 	 
	 	(X)	=	the
    number of Warrant Shares that would be issuable upon exercise of this Warrant in accordance with the terms of this Warrant
    if such exercise were by means of a cash exercise rather than a cashless exercise.



 


“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 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 Holder and reasonably acceptable to the Company, the fees and expenses of which shall be paid by the
Company.


 




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“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 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 Holder then outstanding and reasonably
acceptable to the Company, the fees and expenses of which shall be paid by the Company.


 


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


 


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 the Holder or (B) the Warrant Shares are eligible for resale by the
Holder without volume or manner-of-sale limitations pursuant to Rule 144 (assuming cashless exercise of the Warrants), 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 by the Warrant Share
Delivery Date. 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.


 


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.


 




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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 (1) 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%/9.99%] 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.


 




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Section
3. Certain Adjustments.


 


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


 


b) Subsequent
Rights Offerings. In addition to any adjustments pursuant to Section 3(a) above, if at any time the Company grants,
issues or sells any Common Stock Equivalents or rights to purchase stock, warrants, securities or other property pro rata to
the record holders of any class of shares of Common Stock (the “Purchase Rights”), then the Holder will be
entitled to acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which the Holder could
have acquired if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant
(without regard to any limitations on exercise hereof, including without limitation, the Beneficial Ownership Limitation)
immediately before the date on which a record is taken for the grant, issuance or sale of such Purchase Rights, or, if no
such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the grant,
issue or sale of such Purchase Rights (provided, however, that to the extent that the Holder’s right to
participate in any such Purchase Right would result in the Holder exceeding the Beneficial Ownership Limitation, then the
Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership of such shares of
Common Stock as a result of such Purchase Right to such extent) and such Purchase Right to such extent shall be held in
abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the
Beneficial Ownership Limitation).


 


c) Pro
Rata Distributions. During such time as this Warrant is outstanding, if the Company shall declare or make any dividend or
other distribution of its assets (or rights to acquire its assets) to holders of shares of Common Stock, by way of return of
capital or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options
by way of a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar
transaction) (a “Distribution”), at any time after the issuance of this Warrant, then, in each such case,
the Holder shall be entitled to participate in such Distribution to the same extent that the Holder would have participated
therein if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant
(without regard to any limitations on exercise hereof, including without limitation, the Beneficial Ownership Limitation)
immediately before the date of which a record is taken for such Distribution, or, if no such record is taken, the date as of
which the record holders of shares of Common Stock are to be determined for the participation in such Distribution
(provided, however, that to the extent that the Holder’s right to participate in any such Distribution
would result in the Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to
participate in such Distribution to such extent (or in the beneficial ownership of any shares of Common Stock as a result of
such Distribution to such extent) and the portion of such Distribution shall be held in abeyance for the benefit of the
Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership
Limitation).


 




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d) Fundamental
Transaction. If, at any time while this Warrant is outstanding, (i) the Company, directly or indirectly, in one or more
related transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company (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, (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 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 Common Stock are given any choice as to the securities, cash or property to be
received in a Fundamental Transaction, then the Holder shall be given the same choice as to the Alternate Consideration it
receives upon any exercise of this Warrant following such Fundamental Transaction. Notwithstanding anything to the contrary,
in the event of a Fundamental Transaction, the Company or any Successor Entity (as defined below) shall, at the
Holder’s option, exercisable at any time concurrently with, or within 30 days after, the consummation of the
Fundamental Transaction (or, if later, the date of the public announcement of the applicable Fundamental Transaction),
purchase this Warrant from the Holder by paying to the Holder an amount of cash equal to the Black Scholes Value of the
remaining unexercised portion of this Warrant on the date of the consummation of such Fundamental Transaction; provided, however,
if the Fundamental Transaction is not within the Company’s control, including not approved by the Company’s Board
of Directors, Holder shall only be entitled to receive from the Company or any Successor Entity, as of the date of
consummation of such Fundamental Transaction, the same type or form of consideration (and in the same proportion), at the
Black Scholes Value (as defined below) of the unexercised portion of this Warrant, that is being offered and paid to the
holders of Common Stock of the Company in connection with the Fundamental Transaction, whether that consideration be in the
form of cash, stock or any combination thereof, or whether the holders of Common Stock are given the choice to receive from
among alternative forms of consideration in connection with the Fundamental Transaction. “Black Scholes
Value” means the value of this Warrant based on the Black and Scholes Option Pricing Model obtained from the
“OV” function on Bloomberg, L.P. (“Bloomberg”) determined as of the day of consummation of the
applicable Fundamental Transaction for pricing purposes and reflecting (A) a risk-free interest rate corresponding to the
U.S. Treasury rate for a period equal to the time between the date of the public announcement of the applicable Fundamental
Transaction and the Termination Date, (B) an expected volatility equal to the greater of 100% and the 100 day volatility
obtained from the HVT function on Bloomberg as of the Trading Day immediately following the public announcement of the
applicable Fundamental Transaction, (C) the underlying price per share used in such calculation shall be the greater of (i)
the sum of the price per share being offered in cash, if any, plus the value of any non-cash consideration, if any, being
offered in such Fundamental Transaction and (ii) the greater of (x) the last VWAP immediately prior to the public
announcement of such Fundamental Transaction and (y) the last VWAP immediately prior to the consummation of such Fundamental
Transaction and (D) a remaining option time equal to the time between the date of the public announcement of the applicable
Fundamental Transaction and the Termination Date. The payment of the Black Scholes Value will be made by wire transfer of
immediately available funds within five Business Days of the Holder’s election (or, if later, on the effective date of
the Fundamental Transaction). The Company shall cause any successor entity in a Fundamental Transaction in which the Company
is not the survivor (the “Successor Entity”) to assume in writing all of the obligations of the Company
under this Warrant and the Letter Agreement 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
Letter Agreement 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 Letter
Agreement with the same effect as if such Successor Entity had been named as the Company herein.


 




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


 


f) Notice
to Holder.


 


i. Adjustment
to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of this Section 3, the Company shall
promptly deliver to the Holder by 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 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.


 




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Section
4. Transfer of Warrant.


 


a) Transferability.
Subject to compliance with any applicable securities laws and the conditions set forth in Section 4(d) hereof, 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.


 






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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.


 


d) Transfer
Restrictions. If, at the time of the surrender of this Warrant in connection with any transfer of this Warrant, the
transfer of this Warrant shall not be either (i) registered pursuant to an effective registration statement under the
Securities Act and under applicable state securities or blue sky laws or (ii) eligible for resale without volume or
manner-of-sale restrictions or current public information requirements pursuant to Rule 144, the Company may require, as a
condition of allowing such transfer, that the Holder or transferee of this Warrant, as the case may be, provide to the
Company an opinion of counsel, the form and substance of which opinion shall be reasonably satisfactory to the Company to the
effect that the transfer of this Warrant does not require registration under the Securities Act.


 


e) Representation
by the Holder. The Holder, by the acceptance hereof, represents and warrants that it is acquiring this Warrant and, upon
any exercise hereof, will acquire the Warrant Shares issuable upon such exercise, for its own account and not with a view to
or for distributing or reselling such Warrant Shares or any part thereof in violation of the Securities Act or any applicable
state securities law, except pursuant to sales registered or exempted under the Securities Act.


 


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 the rights of a Holder to receive Warrant Shares on a
“cashless exercise,” and to receive the cash payments contemplated pursuant to Sections 2(d)(i) and 2(d)(iv), in
no event will the Company be required to net cash settle an exercise of this Warrant.


 


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


 




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c) Saturdays,
Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required
or granted herein shall not be a 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.


 




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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, shareholders, partners, members, employees or agents) shall be commenced exclusively in the
state and federal courts sitting in the City of New York. Each party hereby irrevocably submits to the exclusive jurisdiction
of the state and federal courts sitting in the City of New York, Borough of Manhattan for the adjudication of any dispute
hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably
waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the
jurisdiction of any such court, that such suit, action or proceeding is improper or is an inconvenient venue for such
proceeding. Each party hereby irrevocably waives personal service of process and consents to process being served in any such
suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of
delivery) to such party at the address in effect for notices to it under this Warrant and agrees that such service shall
constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in
any way any right to serve process in any other manner permitted by law. If either party shall commence an action, suit or
proceeding to enforce any provisions of this Warrant, the prevailing party in such action, suit or proceeding shall be
reimbursed by the other party for their reasonable attorneys’ fees and other costs and expenses incurred with the
investigation, preparation and prosecution of such action or proceeding.


 


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


 


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


 




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h) Notices.
Any and all notices or other communications or deliveries to be provided by the holders hereunder including, without
limitation, any Notice of Exercise, shall be in writing and delivered personally, by facsimile or e-mail, or sent by a
nationally recognized overnight courier service, addressed to the Company, at 99 Hayden Avenue, Suite 390, Lexington, MA
02421, Attention: Teofilo Raad, email address: traad@pulmatrix.com, facsimile: N/A, or such other email address or address as
the Company may specify for such purposes by notice to the Holders. Any and all notices or other communications or deliveries
to be provided by the Company hereunder shall be in writing and delivered personally, by facsimile or e-mail, or sent by a
nationally recognized overnight courier service addressed to each Holder at the facsimile number, e-mail address or address
of such Holder appearing on the books of the Company. Any notice or other communication or deliveries hereunder shall be
deemed given and effective on the earliest of (i) the time of transmission, if such notice or communication is delivered via
facsimile at the facsimile number or via e-mail at the e-mail address set forth in this Section prior to 5:30 p.m. (New York
City time) on any date, (ii) the next Trading Day after the time of transmission, if such notice or communication is
delivered via facsimile at the facsimile number or via e-mail at the e-mail address set forth in this Section on a day that
is not a Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the second (2nd)
Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (iv) upon
actual receipt by the party to whom such notice is required to be given.


 


i)
Restrictions on Variable Rate Transactions. From
the Initial Exercise Date until April 8, 2021, the Company shall be prohibited from effecting or entering into an agreement to
effect any issuance by the Company or any of its Subsidiaries of Common Stock or Common Stock Equivalents (or a combination of
units thereof) involving a Variable Rate Transaction. “Variable Rate Transaction” means a transaction in which the
Company (i) issues or sells any debt or equity securities that are convertible into, exchangeable or exercisable for, or include
the right to receive additional shares of Common Stock either (A) at a conversion price, exercise price or exchange rate or other
price that is based upon and/or varies with the trading prices of or quotations for the shares of Common Stock at any time after
the initial issuance of such debt or equity securities, or (B) with a conversion, exercise or exchange price that is subject to
being reset at some future date after the initial issuance of such debt or equity security or upon the occurrence of specified
or contingent events directly or indirectly related to the business of the Company or the market for the Common Stock (other than
“full ratchet” or “weighted average” anti-dilution provisions that may be contained in any Common Stock
Equivalents issued after the Initial Exercise Date) or (ii) enters into, or effects a transaction under, any agreement, including,
but not limited to, an equity line of credit, whereby the Company may issue securities at a future determined price. The Holder
shall be entitled to obtain injunctive relief against the Company to preclude any such issuance, which remedy shall be in addition
to any right to collect damages.


 


j)
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.


 


k)
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.


 


l)
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.


 




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m)
Amendment. This Warrant may be modified or amended or
the provisions hereof waived with the written consent of the Company, on the one hand, and the Holder of this Warrant, on the
other hand.


 


n)
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.


 


o)
Acceptance. Receipt of this Warrant by the Holder shall
constitute acceptance of and agreement to all of the terms and conditions contained herein.


 


p)
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)


 




    	17



    	 



    




 


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.


 


	 	PULMATRIX,
    INC.
	 	 
	 	By:	            
	 	Name:	
	 	Title:	



 




    	18



    	 



    

 


NOTICE
OF EXERCISE


 


To: PULMATRIX,
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:


 


_______________________________


 


_______________________________


 


_______________________________


 


(4) Accredited
Investor. The undersigned is an “accredited investor” as defined in Regulation D promulgated under the
Securities Act of 1933, as amended.


 


[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 exercise the Warrant
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:_________________