Exhibit 10.4


 


Support Agreement


 


THIS SUPPORT AGREEMENT
is entered into as of June 29, 2020 (this “Agreement”), by and among RareGen, LLC, a Delaware limited
liability company (“RareGen”), Liquidia Technologies, Inc., a Delaware corporation (“Liquidia”),
the undersigned stockholders of Liquidia (together, “Stockholder”) and Liquidia Corporation, a newly-formed
Delaware corporation and wholly-owned subsidiary of Liquidia (“HoldCo”). For purposes of this Agreement,
terms used and not otherwise defined herein shall have the respective meanings ascribed thereto in the Merger Agreement (as hereinafter
defined).


 


WHEREAS, concurrently
with the execution of this Agreement, Liquidia, HoldCo, RareGen, Gemini Merger Sub I, Inc., a Delaware corporation and a wholly-owned
subsidiary of Liquidia (“Liquidia Merger Sub”), Gemini Merger Sub II, Inc., a Delaware corporation and
a wholly-owned subsidiary of HoldCo (“RareGen Merger Sub”), and PBM RG Holdings, LLC, a Delaware limited
liability company, solely in its capacity as the Members’ Representative, will enter into an Agreement and Plan of Merger
(as the same may be amended from time to time, the “Merger Agreement”), providing for, among other things,
the merger (the “Merger”) of Merger Sub with and into Liquidia pursuant to the terms and conditions of
the Merger Agreement;


 


WHEREAS, as a condition
to its willingness to enter into the Merger Agreement, each of HoldCo, Liquidia and RareGen has required that Stockholder execute
and deliver this Agreement; and


 


WHEREAS, in order to
induce each of HoldCo, Liquidia and RareGen to enter into the Merger Agreement, Stockholder is willing to make certain representations,
warranties, covenants and agreements with respect to the shares of common stock, $0.001 par value per share, of Liquidia (the “Common
Stock”) beneficially owned by Stockholder and set forth on Exhibit A (the “Original Shares”
and, together with any additional shares of Common Stock acquired after the date of this Agreement pursuant to Section 5,
the “Shares”).


 


NOW, THEREFORE, in
consideration of the premises and for other good and valuable consideration, the receipt, sufficiency and adequacy of which are
hereby acknowledged, the parties hereto agree as follows:


 


1.         
Representations of Stockholder.   Stockholder represents and warrants to HoldCo, Liquidia and RareGen that,
as of the date hereof:


 


a.                   (i)
Stockholder (A) owns beneficially (as such term is defined in Rule 13d-3 under the Exchange Act) all of the Original Shares
set forth on Exhibit A, free and clear of all Encumbrances and (ii) except pursuant hereto, there (A) are no options,
warrants or other rights, agreements, arrangements or commitments of any character to which Stockholder is a party relating
to the (i) pledge, (ii) disposition, (iii) transfer, sale, offer, exchange, assignment, pledge, tender, grant of a security
interest in, hypothecation or other conveyance or disposition of or encumbrance (“Transfer”), or
(iv) voting of any of the Original Shares set forth on Exhibit A, and there are no voting trusts or voting agreements
with respect to such Original Shares, and (B) there will not be any options, warrants or other rights, agreements,
arrangements or commitments of any character to which Stockholder is a party relating to the pledge, disposition, Transfer or
voting of any of additional Shares acquired after the date of this Agreement, and there will not be any voting trusts or
voting agreements with respect to such additional Shares.


 






    


     


    

 


b.                 
Stockholder does not beneficially own any shares of Common Stock other than (i) the Original Shares set forth on Exhibit
A and (ii) any options, warrants or other securities, interests or rights to acquire any additional shares of Common Stock
or any security exchangeable or exercisable for or convertible into shares of Common Stock, in each instance, set forth on the
signature page of this Agreement (collectively, “Options”).


 


c.                  
Stockholder has full corporate power and authority and legal capacity to enter into, execute and deliver this Agreement
and to perform fully Stockholder’s obligations hereunder (including the proxy described in Section 2(b)). This Agreement
has been duly and validly executed and delivered by Stockholder and, assuming due authorization, execution and delivery by the
other parties hereto, constitutes the legal, valid and binding obligation of Stockholder, enforceable against Stockholder in accordance
with its terms.


 


d.                 
None of the execution and delivery of this Agreement by Stockholder, the consummation by Stockholder of the transactions
contemplated hereby or compliance by Stockholder with any of the provisions hereof will conflict with or result in a breach, or
constitute a default (with or without notice or lapse of time or both) under any provision of, any Contract, trust agreement, loan
or credit agreement, note, bond, mortgage, indenture, lease or other agreement, instrument or Law applicable to Stockholder or
to the Shares.


 


e.                  
No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity or other person
on the part of Stockholder is required in connection with the valid execution and delivery of this Agreement. No consent of Stockholder’s
spouse is necessary under any “community property” or other Laws in order for Stockholder to enter into and perform
its obligations under this Agreement.


 


f.                   
There is no litigation pending against or, to the knowledge of Stockholder, threatened against or affecting, Stockholder
or the Shares at law or in equity that could reasonably be expected to impair or adversely affect the ability of Stockholder to
fulfill Stockholder's obligations hereunder.


 


g.                 
Stockholder understands and acknowledges that HoldCo, Liquidia and RareGen are entering into the Merger Agreement in reliance
upon Stockholder’s execution and delivery of this Agreement and the representations and warranties of Stockholder contained
herein.


 






    


     


    

 


		2.	Agreement to Vote Shares; Irrevocable Proxy.



 


a.                  
In furtherance of the foregoing and to the extent permitted by applicable law, rule or regulation, (I) Stockholder agrees
during the term of this Agreement to vote the Shares, and to cause any holder of record of Shares to vote or to execute a written
consent or consents with respect to the Shares if stockholders of Liquidia are requested to vote their shares through the execution
of an action by written consent in lieu of any annual or special meeting of stockholders of Liquidia: (i) in favor of the adoption
and approval of the Merger Agreement and the consummation of the Merger and the other transactions contemplated by the Merger
Agreement and the other Ancillary Agreements (as defined in the Merger Agreement) at every meeting (or in connection with any
action by written consent) of the stockholders of Liquidia at which such matters are considered and at every adjournment or postponement
thereof; (ii) against (1) any Takeover Proposal, (2) any action, proposal, transaction or agreement which could reasonably be
expected to result in a breach of any covenant, representation or warranty or any other obligation or agreement of Liquidia under
the Merger Agreement or of Stockholder under this Agreement and (3) any action, proposal, transaction or agreement that could
reasonably be expected to impede, interfere with, delay, discourage, adversely affect or inhibit the timely consummation of the
Merger and the other transactions contemplated by the Merger Agreement or the other Ancillary Agreements or the fulfillment of
HoldCo’s, Liquidia’s or Liquidia Merger Sub’s conditions under the Merger Agreement or change in any manner
the voting rights of any class of shares of capital stock of Liquidia (including any amendments to Liquidia’s or HoldCo’s
organizational documents). In the event Stockholder executes a written consent conveying the Shares as contemplated above and
voting in favor of the adoption and approval of the Merger Agreement and the consummation of the Merger and the other transactions
contemplated by the Merger Agreement, (II) Stockholder (i) represents and warrants that any written consent shall, when executed
and delivered, be duly and validly executed and delivered and binding upon Stockholder, and (ii) covenants and agrees that such
written consent will be binding upon Stockholder and enforceable at the Effective Time. For purposes herein, “Takeover
Proposal” means with respect to Liquidia or Holdco, an inquiry, proposal, or offer from, or indication of interest
in making a proposal or offer by, any person or group relating to any transaction or series of related transactions (other than
the transactions contemplated by the Merger Agreement), involving any: (a) direct or indirect acquisition of assets of such party
hereto or its subsidiaries (including any voting equity interests of subsidiaries, but excluding sales of assets in the ordinary
course of business) equal to 15% or more of the fair market value of such party and its subsidiaries’ consolidated assets
or to which 15% or more of such party’s and its subsidiaries’ net revenues or net income on a consolidated basis are
attributable; (b) direct or indirect acquisition of 15% or more of the voting equity interests of such party hereto or any of
its subsidiaries whose business constitutes 15% or more of the consolidated net revenues, net income, or assets of such party
and its subsidiaries, taken as a whole; (c) tender offer or exchange offer that if consummated would result in any person or group
(as defined in Section 13(d) of the Exchange Act) beneficially owning (within the meaning of Section 13(d) of the Exchange Act)
15% or more of the voting power of such party hereto;


 






    


     


    

 


(d) merger, consolidation, other
business combination, or similar transaction involving such party hereto or any of its subsidiaries, pursuant to which such person
or group (as defined in Section 13(d) of the Exchange Act) would own 15% or more of the consolidated net revenues, net income,
or assets of such party and its subsidiaries, taken as a whole; (e) liquidation, dissolution (or the adoption of a plan of liquidation
or dissolution), or recapitalization or other significant corporate reorganization of such party hereto or one or more of its subsidiaries
which, individually or in the aggregate, generate or constitute 15% or more of the consolidated net revenues, net income, or assets
of such party and its subsidiaries, taken as a whole; or (f) any combination of the foregoing.


 


b.                 
Stockholder hereby appoints HoldCo or any officer of HoldCo, and each of them individually, its proxies and attorneys-in-fact,
with full power of substitution and resubstitution, to vote or act by written consent during the term of this Agreement with respect
to the Shares in accordance with Section 2(a), in the event that either (i) Stockholder breaches any of its obligations
under this Agreement, or (ii) Stockholder fails to vote or act by written consent with respect to the Shares in accordance with
Section 2(a) prior to or at the meeting of the stockholders of Liquidia at which the matters described in Section 2(a)
are considered or the last date by which written consents with respect to such matters are required to be delivered in order to
be effective. This proxy and power of attorney is given to secure the performance of the duties of Stockholder under this Agreement.
Stockholder shall take such further action or execute such other instruments as may be necessary to effectuate the intent of this
proxy. This proxy and power of attorney granted by Stockholder shall be irrevocable during the term of this Agreement, shall be
deemed to be coupled with an interest sufficient in law to support an irrevocable proxy and shall revoke any and all prior proxies
granted by Stockholder with respect to the Shares. The power of attorney granted by Stockholder herein is a durable power of attorney
and shall survive the dissolution, bankruptcy, death or incapacity of Stockholder. The proxy and power of attorney granted hereunder
shall terminate upon the termination of this Agreement.


 


3.   
No Voting Trusts or Other Arrangement. Stockholder agrees that Stockholder will not, and will not permit any entity
under Stockholder’s control to, deposit any of the Shares in a voting trust, grant any proxies with respect to the Shares
or subject any of the Shares to any arrangement with respect to the voting of the Shares other than agreements entered into with
HoldCo in accordance herewith.


 


4.   
Successors and Assigns. Stockholder agrees that this Agreement and the obligations hereunder shall attach to the
Shares and shall be binding upon any person to which legal or beneficial ownership shall pass, whether by operation of law or otherwise,
including, without limitation, Stockholder's successors, heirs, legal representatives, trustees, executors or assigns.


 


5.    Additional
Shares. Stockholder agrees that all shares of Common Stock that Stockholder purchases, acquires the right to vote or
otherwise acquires beneficial ownership (as defined in Rule 13d-3 under the Exchange Act) of after the execution of this
Agreement (including, for the avoidance of doubt, and shares of Common Stock that Stockholder purchases, acquires the right
to vote or otherwise acquires beneficial ownership of upon the exercise, exchange or conversion of any Options) shall be
subject to the terms of this Agreement and shall constitute Shares for all purposes of this Agreement.


 






    


     


    

 


6.   
Waiver of Appraisal and Dissenters’ Rights. To the extent applicable, Stockholder hereby (i) waives, and agrees
not to assert or perfect, any rights of appraisal or rights to dissent from the Merger that Stockholder may have by virtue of ownership
of the Shares (including under Section 262 of Delaware Law) and (ii) agrees (A) not to commence or participate in and (B) to take
all actions necessary to opt out of any class in any class action with respect to any claim, derivative or otherwise, against HoldCo,
Liquidia, Liquidia Merger Sub, RareGen, RareGen Merger Sub or any of their respective Affiliates relating to the negotiation, execution
or delivery of this Agreement or the Merger Agreement or the consummation of the Transactions, including any claim (1) challenging
the validity of, or seeking to enjoin the operation of, any provision of this Agreement or the Merger Agreement or (2) alleging
a breach of any fiduciary duty of the Board of Directors of Liquidia in connection with this Agreement, the Merger Agreement or
the Transactions (it being understood that nothing in this section shall restrict or prohibit the Stockholder from asserting counterclaims
or defenses in any proceeding brought or claims asserted against it by HoldCo, Liquidia, Liquidia Merger Sub, RareGen, RareGen
Merger Sub or any of their respective Affiliates relating to this Agreement or the Merger Agreement, or from enforcing its rights
under this Agreement or any Ancillary Agreement to which it is a party).


 


7.   
Documentation, Information and Communication. Stockholder (i) consents and authorizes Liquidia to (a) publish and
disclose in Liquidia’s Proxy Statement, any Current Report on Form 8-K and any other documents required to be filed with
the United States Securities and Exchange Commission or any regulatory filing to any Governmental Entity in connection with the
Merger, Stockholder's identity and ownership of the Shares and the nature of its commitments, arrangements and understandings under
this Agreement and (b) file this Agreement as an exhibit to any required filing with the United States Securities and Exchange
Commission or any regulatory authority relating to the Merger and (ii) agrees as promptly as practicable to give to Liquidia or
HoldCo any information that Liquidia or HoldCo may reasonably require for the preparation of any such disclosure documents. Stockholder
agrees to as promptly as practicable notify Liquidia and HoldCo of any required corrections with respect to any information supplied
by it specifically for use in any such disclosure document, if and to the extent that any shall become false or misleading in any
material respect.


 


8.    
Voting Restrictions.


 


a.                  
Stockholder understands and agrees that if Stockholder attempts to vote or provide any other person with the authority to
vote any of the Shares other than in compliance with this Agreement, Liquidia shall not, and Stockholder hereby unconditionally
and irrevocably instructs Liquidia to not, record such vote, in each case, unless and until Stockholder shall have complied with
the terms of this Agreement.


 


b.                  Except
as otherwise permitted by this Agreement, Stockholder will not commit any act that restricts Stockholder’s legal power,
authority and right to vote all of the Shares or otherwise prevent or disable Stockholder from performing any of
Stockholder’s obligations under this Agreement. Without limiting the generality of the foregoing, except for this
Agreement, Stockholder will not enter into any voting agreement with any person with respect to any of the Shares, grant any
person any proxy (revocable or irrevocable) or power of attorney with respect to any of the Shares, deposit any of the Shares
in a voting trust or otherwise enter into any agreement or arrangement with any person limiting or affecting
Stockholder’s legal power, authority or right to vote the Shares in accordance with this Agreement.


 






    


     


    

 


9.    
Representations of RareGen. RareGen represents and warrants to Stockholder that, as of the date hereof and as of
the Effective Time:


 


a.                  
RareGen has full corporate power and authority and legal capacity to enter into, execute and deliver this Agreement and
to perform fully RareGen’s obligations hereunder. This Agreement has been duly and validly executed and delivered by Liquidia
and, assuming due authorization, execution and delivery by the other parties hereto, constitutes the legal, valid and binding obligation
of RareGen, enforceable against RareGen in accordance with its terms, subject to (i) laws of general application relating to bankruptcy,
insolvency and the relief of debtors, and (ii) rules of law governing specific performance, injunctive relief and other equitable
remedies.


 


b.                 
None of the execution and delivery of this Agreement by RareGen, the consummation by RareGen of the transactions contemplated
hereby or compliance by RareGen with any of the provisions hereof will conflict with or result in a breach, or constitute a default
(with or without notice or lapse of time or both) under any provision of, any Contract, trust agreement, loan or credit agreement,
note, bond, mortgage, indenture, lease or other agreement, instrument or Law applicable to RareGen or to RareGen’s property
or assets.


 


c.                  
No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity or other person
on the part of RareGen is required in connection with the valid execution and delivery of this Agreement.


 


d.                 
There is no litigation pending against or, to the knowledge of RareGen, threatened against or affecting, RareGen at law
or in equity that could reasonably be expected to impair or adversely affect the ability of RareGen’s obligations hereunder.


 


10.   Representations
of HoldCo. HoldCo represents and warrants to RareGen and Stockholder that, as of the date hereof and as of the Effective Time:


 


a.                   HoldCo
has full corporate power and authority and legal capacity to enter into, execute and deliver this Agreement and to perform
fully HoldCo’s obligations hereunder. This Agreement has been duly and validly executed and delivered by HoldCo and,
assuming due authorization, execution and delivery by the other parties hereto, constitutes the legal, valid and binding
obligation of Liquidia, enforceable against HoldCo in accordance with its terms, subject to (i) laws of general application
relating to bankruptcy, insolvency and the relief of debtors, and (ii) rules of law governing specific performance,
injunctive relief and other equitable remedies.


 






    


     


    

 


b.                 
None of the execution and delivery of this Agreement by HoldCo, the consummation by HoldCo of the transactions contemplated
hereby or compliance by HoldCo with any of the provisions hereof will conflict with or result in a breach, or constitute a default
(with or without notice or lapse of time or both) under any provision of, any Contract, trust agreement, loan or credit agreement,
note, bond, mortgage, indenture, lease or other agreement, instrument or Law applicable to HoldCo or to HoldCo’s property
or assets.


 


c.                  
No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity or other person
on the part of HoldCo is required in connection with the valid execution and delivery of this Agreement.


 


d.                 
There is no litigation pending against or, to the knowledge of HoldCo, threatened against or affecting, HoldCo or the Shares
at law or in equity that could reasonably be expected to impair or adversely affect the ability of HoldCo’s or the Stockholder's
obligations hereunder.


 


11. 
Representations of Liquidia. Liquidia represents and warrants to RareGen and Stockholder that, as of the date hereof and
as of the Effective Time:


 


a.                  
Liquidia has full corporate power and authority and legal capacity to enter into, execute and deliver this Agreement and
to perform fully Liquidia’s obligations hereunder. This Agreement has been duly and validly executed and delivered by Liquidia
and, assuming due authorization, execution and delivery by the other parties hereto, constitutes the legal, valid and binding obligation
of Liquidia, enforceable against Liquidia in accordance with its terms, subject to (i) laws of general application relating to
bankruptcy, insolvency and the relief of debtors, and (ii) rules of law governing specific performance, injunctive relief and other
equitable remedies.


 


b.                 
None of the execution and delivery of this Agreement by Liquidia, the consummation by Liquidia of the transactions contemplated
hereby or compliance by Liquidia with any of the provisions hereof will conflict with or result in a breach, or constitute a default
(with or without notice or lapse of time or both) under any provision of, any Contract, trust agreement, loan or credit agreement,
note, bond, mortgage, indenture, lease or other agreement, instrument or Law applicable to Liquidia or to Liquidia’s property
or assets.


 


c.                  
No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity or other person
on the part of Liquidia is required in connection with the valid execution and delivery of this Agreement.


 






    


     


    

 


d.                 
 There is no litigation pending against or, to the knowledge of Liquidia, threatened against or affecting, Liquidia or the
Shares at law or in equity that could reasonably be expected to impair or adversely affect the ability of Liquidia’s or the
Stockholder's obligations hereunder.


 


12. 
Termination. This Agreement shall terminate upon the earliest to occur of (i) the Effective Time, and (ii) the date
on which the Merger Agreement is validly terminated in accordance with its terms. Upon the termination of this Agreement, neither
party hereto shall have any further obligations or liabilities hereunder; provided that neither the provisions of this Section
12 nor the termination of this Agreement shall (i) relieve any party hereto from any liability of such party to any other party
incurred prior to such termination or expiration, (ii) relieve any party hereto from any liability to any other party arising out
of or in connection with a breach of this Agreement or (iii) if this Agreement terminates because the Effective Time has occurred,
terminate the obligations under Section 6, Section 7, Section 13, Section 16 or Section 17,
in each case, except as such obligations specifically terminate in accordance with the terms of such Sections.


 


13. 
No Agreement as Director or Officer. Stockholder makes no agreement or understanding in this Agreement in Stockholder’s
capacity as a director or officer of Liquidia, HoldCo or any of their Subsidiaries (if Stockholder holds such office), and nothing
in this Agreement will be construed to prohibit, limit or restrict Stockholder from exercising Stockholder’s fiduciary duties
as an officer or director, but solely in such capacities if applicable, to Liquidia, HoldCo or their stockholders.


 


14.  
Specific Performance Each party hereto acknowledges that it will be impossible to measure in money the damage to
the other parties if a party hereto fails to comply with any of the obligations imposed by this Agreement, that every such obligation
is material and that, in the event of any such failure, the other parties will not have an adequate remedy at law or damages. Accordingly,
each party hereto agrees that injunctive relief or other equitable remedy, in addition to remedies at law or damages, is the appropriate
remedy for any such failure and will not oppose the seeking of such relief on the basis that the other party has an adequate remedy
at law. Each party hereto agrees that it will not seek, and agrees to waive any requirement for, the securing or posting of a bond
in connection with the other party’s seeking or obtaining such equitable relief.


 


15. 
Entire Agreement. This Agreement supersedes all prior agreements, written or oral, between the parties hereto with
respect to the subject matter hereof and contains the entire agreement between the parties with respect to the subject matter hereof.
This Agreement may not be amended or supplemented, and no provisions hereof may be modified or waived, except by an instrument
in writing signed by Liquidia, HoldCo, RareGen and the Stockholder. No waiver of any provisions hereof by any party shall be deemed
a waiver of any other provisions hereof by such party, nor shall any such waiver be deemed a continuing waiver of any provision
hereof by such party.


 


16.  Notices.
All notices, requests, claims, demands, and other communications hereunder shall be in writing and shall be deemed to have
been given (a) when delivered by hand, (b) on the first day after the date sent by a nationally recognized overnight courier,
(c) on the date sent by e-mail, if sent during normal business hours of the recipient, and on the next Business Day if sent
after normal business hours of the recipient, or (d) on the third day after the date mailed, by certified or registered mail,
return receipt requested, postage prepaid. Such communications must be sent to the respective parties at the following
addresses (or at such other address for a party as shall be specified in a notice given in accordance with this Section
16):


 






    


     


    

 


If to Liquidia or HoldCo, addressed to
it at:


 


Liquidia Technologies, Inc.


P.O. Box 110085


Research Triangle Park, NC 27709


Telephone: (919) 328-4400


Attention: Neal Fowler


E-mail: Neal.Fowler@liquidia.com


 


with a copy (which shall not constitute
notice) to:


 


DLA Piper LLP (US)


51 John F. Kennedy Parkway, Suite 120


Short Hills, NJ 07078


Telephone: (973) 520-2553


Facsimile: (973) 520-2573


E-mail: andrew.gilbert@us.dlapiper.com


Attention: Andrew P. Gilbert, Esq.


 


If to RareGen, addressed to
it at:


 


RareGen, LLC


200 Garrett Street, Suite S


Charlottesville, VA 22902


Attention: General Counsel


E-mail: legal@pbmcap.com


 


with a copy (which shall not constitute
notice) to:


 


Cooley LLP


55 Hudson Yards


New York, NY 10001-2157


Telephone: (212) 479-6474; (212) 479-6481


Facsimile: (212) 479-6275


E-mail: dgupta@cooley.com; inussbaum@cooley.com


Attention: Div Gupta, Esq.; Ian
A. Nussbaum, Esq


 


If to the Stockholder:


  


New Enterprise Associates 12,
Limited Partnership


NEA Ventures 2006 Limited Partnership


1954 Greenspring Drive, Suite
600


Timonium, MD 21093


 


Attention: Louis S. Citron,
Chief Legal Officer


 






    


     


    

 


17.  
Miscellaneous.


 


a.                  
This Agreement shall be governed by and construed in accordance with the internal laws of the State of Delaware without
giving effect to any choice or conflict of law provision or rule (whether of the State of Delaware or any other jurisdiction) that
would cause the application of Laws of any jurisdiction other than those of the State of Delaware.


 


b.                 
Each of the parties hereto irrevocably agrees that any legal action or proceeding with respect to this Agreement and the
rights and obligations arising hereunder, or for recognition and enforcement of any judgment in respect of this Agreement and the
rights and obligations arising hereunder brought by the other party hereto or its successors or assigns shall be brought and determined
exclusively in the Delaware State Court, or in the event (but only in the event) that such court does not have subject matter jurisdiction
over such action or proceeding, in any federal court located in the State of Delaware. Each of the parties hereto agrees that mailing
of process or other papers in connection with any such action or proceeding in the manner provided in Section 16
or in such other manner as may be permitted by applicable Laws, will be valid and sufficient service thereof. Each of the parties
hereto hereby irrevocably submits with regard to any such action or proceeding for itself and in respect of its property, generally
and unconditionally, to the personal jurisdiction of the aforesaid courts and agrees that it will not bring any action relating
to this Agreement or any of the transactions contemplated by this Agreement in any court or tribunal other than the aforesaid courts.
Each of the parties hereto hereby irrevocably waives, and agrees not to assert, by way of motion, as a defense, counterclaim or
otherwise, in any action or proceeding with respect to this Agreement and the rights and obligations arising hereunder, or for
recognition and enforcement of any judgment in respect of this Agreement and the rights and obligations arising hereunder (i) any
claim that it is not personally subject to the jurisdiction of the above named courts for any reason other than the failure to
serve process in accordance with this Section ‎17(b), (ii) any claim that it or its property is exempt or
immune from jurisdiction of any such court or from any legal process commenced in such courts (whether through service of notice,
attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise), and (iii) to the
fullest extent permitted by the applicable Law, any claim that (x) the suit, action or proceeding in such court is brought in an
inconvenient forum, (y) the venue of such suit, action or proceeding is improper, or (z) this Agreement, or the subject matter
hereof, may not be enforced in or by such courts.


 


c.                   EACH
PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND
DIFFICULT ISSUES AND, THEREFORE, EACH SUCH PARTY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY
JURY IN RESPECT OF ANY LEGAL ACTION ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS
AGREEMENT. EACH PARTY TO THIS AGREEMENT CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE OF ANY OTHER PARTY HAS
REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT SEEK TO ENFORCE THE FOREGOING WAIVER IN THE EVENT OF A
LEGAL ACTION, (B) SUCH PARTY HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) SUCH PARTY MAKES THIS WAIVER VOLUNTARILY,
AND (D) SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND
CERTIFICATIONS IN THIS SECTION ‎17(C).


 






    


     


    

 


d.                 
If any term or provision of this Agreement is invalid, illegal or unenforceable in any jurisdiction, such invalidity, illegality
or unenforceability shall not affect any other term or provision of this Agreement or invalidate or render unenforceable such term
or provision in any other jurisdiction. Upon such determination that any term or other provision is invalid, illegal or unenforceable,
the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as
closely as possible in a mutually acceptable manner in order that the transactions contemplated hereby be consummated as originally
contemplated to the greatest extent possible.


 


e.                  
This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which
together shall constitute one and the same instrument, and such execution may be done by original signature or by email of a PDF
document (with confirmation of transmission).


 


f.                   
Each party hereto agrees, from time to time, at the reasonable request of any other party hereto and without further consideration,
to execute and deliver such additional documents and to take such further actions as are necessary or reasonably requested to confirm
and assure the rights and obligations set forth in this Agreement.


 


g.                 
All Section headings herein are for convenience of reference only and are not part of this Agreement, and no construction
or reference shall be derived therefrom.


 


h.                 
Notwithstanding anything in this Agreement to the contrary, the obligations of Stockholder set forth in this Agreement shall
not be effective or binding upon Stockholder until after such time as the Merger Agreement is executed and delivered by the parties
to the Merger Agreement, and the parties hereto agree that there is not and has not been any other agreement, arrangement or understanding
between the parties hereto with respect to the matters set forth herein.


 


i.                    None
of the parties to this Agreement may assign any of its rights or obligations under this Agreement without the prior written
consent of the other parties hereto, except that each of Liquidia and HoldCo may assign, in its sole discretion, all or any
of its rights, interests and obligations hereunder to any of its Affiliates to which it assigns its rights under the Merger
Agreement in accordance with its terms. Any assignment contrary to the provisions of this Section ‎17(i)
shall be null and void.


 


[Signature Page Follows]


 






    


     


    

 


IN WITNESS WHEREOF,
the parties hereto have executed and delivered this Agreement as of the date first written above.


	 	 
	 	RAREGEN, LLC
	 	 
	 	By:	   /s/
    Damian deGoa
	 	Name:	Damian deGoa
	 	Title:	Chief Executive Officer
	 	 
	 	LIQUIDIA CORPORATION
	 	 
	 	By:	   /s/ Neal
    F. Fowler
	 	Name:	Neal F. Fowler
	 	Title:	Chief Executive Officer
	 	 
	 	LIQUIDIA TECHNOLOGIES, INC.
	 	 
	 	By:	   /s/ Neal
    F. Fowler
	 	Name:	Neal F. Fowler
	 	Title:	Chief Executive Officer




 
 






    


     


    

	 	 
	 	NEW ENTERPRISE ASSOCIATES 12, LIMITED PARTNERSHIP
	 	 
	 	By: NEA Partners 12, Limited Partnership, its general partner
	 	By: NEA 12 GP, LLC, its general partner
	 	 
	 	By:	   /s/ Louis Citron
	 	Name:	 Louis Citron
	 	Title:	Authorized Signatory
	 	 
	 	NEA VENTURES 2006 LIMITED PARTNERSHIP
	 	 
	 	By:	   /s/ Louis Citron
	 	Name:	Louis Citron
	 	Title:	Vice President




 






    


     


    

 


Exhibit A


 


Number of Shares of Common Stock: 2,486,062


Number of Options: None.


Warrant: 40,702