Exhibit
10.4


 


REGISTRATION
RIGHTS AGREEMENT


 


THIS
REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [_____], 2017, is made and entered into
by and among KBL Merger Corp. IV, a Delaware corporation (the “Company”), KBL IV Sponsor LLC, a Delaware
limited liability company (the “Sponsor”), Ladenburg Thalmann & Co. Inc. (“LT &
Co.”) and the undersigned parties listed under Holders on the signature page hereto (each such party, together with
the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2 of
this Agreement, a “Holder” and collectively the “Holders”).


 


RECITALS


 


WHEREAS,
the Company and the Sponsor have entered into that certain Securities Purchase Agreement (the “Founder Shares Purchase
Agreement”), dated as of September 7, 2016, pursuant to which the Sponsor purchased an aggregate of 2,875,000 shares
(the “Founder Shares”) of the Company’s common stock, par value $0.0001 per share (the “Common
Stock”); and


 


WHEREAS,
on May 25, 2017, the Company and the Sponsor entered into that certain Second Amended and Restated Unit Subscription
Agreement (the “Sponsor Agreement”), and the Company and LT & Co. entered into that certain
Second Amended and Restated Unit Subscription Agreement (the “LT & Co. Agreement”), pursuant to
which the Sponsor and LT & Co. agreed to purchase an aggregate of 450,000 units (or up to 502,500 units if the
underwriters’ over-allotment option is exercised in full), each unit consisting of one share of Common Stock (the
“Private Placement Shares”), one right to receive one-tenth of one share of Common Stock (the
“Private Placement Rights”) and one warrant to purchase one-half of one share of Common Stock (the
“Private Placement Warrants”), in a private placement transaction occurring simultaneously with the
closing of the Company’s initial public offering; and


 


WHEREAS,
the Company and the Holders desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain
registration rights with respect to certain securities of the Company, as set forth in this Agreement.


 


NOW, THEREFORE,
in consideration of the representations, covenants and agreements contained herein, and certain other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree
as follows:


 


ARTICLE
I


DEFINITIONS


 


1.1 Definitions.
The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set
forth below:


 


“Adverse
Disclosure” shall mean any public disclosure of material non-public information, which disclosure, in the good faith
judgment of the Chief Executive Officer or principal financial officer of the Company, after consultation with counsel to the
Company, (i) would be required to be made in any Registration Statement or Prospectus in order for the applicable Registration
Statement or Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make
the statements contained therein (in the case of any prospectus and any preliminary prospectus, in the light of the circumstances
under which they were made) not misleading, (ii) would not be required to be made at such time if the Registration Statement
were not being filed, and (iii) the Company has a bona fide business purpose for not making such information public.


 


“Agreement”
shall have the meaning given in the Preamble.


 


“Board”
shall mean the Board of Directors of the Company.


  


“Business
Combination” shall mean any merger, capital stock exchange, asset acquisition, stock purchase, reorganization or
other similar business combination with one or more businesses, involving the Company.


 


“Commission”
shall mean the Securities and Exchange Commission.


  






     

     


    

 


“Common
Stock” shall have the meaning given in the Recitals hereto.


 


“Company”
shall have the meaning given in the Preamble.


 


“Demand
Registration” shall have the meaning given in subsection 2.1.1.


 


“Demanding
Holder” shall have the meaning given in subsection 2.1.1.


 


“Exchange
Act” shall mean the Securities Exchange Act of 1934, as it may be amended from time to time.


 


“Form
S-1” shall have the meaning given in subsection 2.1.1.


 


“Form
S-3” shall have the meaning given in subsection 2.3.


 


“Founder
Lock-up Period” shall mean, with respect to the Founder Shares, the period ending on the earlier of one year after the
completion of the Company’s initial Business Combination or earlier if, subsequent to the Business Combination, the last
sale price of the Common Stock (x) equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations,
recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the
Company’s initial Business Combination or (y) the date following the completion of the Company’s initial Business
Combination on which the Company completes a liquidation, merger, stock exchange or other similar transaction that results in
all of the Company’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other
property, except in each case for transfers to Permitted Transferees.


 


“Founder
Shares” shall have the meaning given in the Recitals hereto.


 


“Founder
Shares Purchase Agreement” shall have the meaning given in the Recitals hereto.


 


“Holders”
shall have the meaning given in the Preamble.


 


“Insider
Letter” shall mean the letter agreement that the Holders (other than LT & Co.) are executing simultaneously
with the Company’s initial public offering addressing certain agreements of the Holders including the transfer restrictions
applicable to the Registrable Securities.


 


“LT
& Co.” shall have the meaning given in the Preamble.


 


“LT
& Co. Agreement” shall have the meaning given in the Recitals hereto.


 


“Maximum
Number of Securities” shall have the meaning given in subsection 2.1.4.


 


“Misstatement”
shall mean an untrue statement of a material fact or an omission to state a material fact required to be stated in a Registration
Statement or Prospectus or necessary to make the statements in a Registration Statement or Prospectus in the light of the circumstances
under which they were made not misleading.


 


“Permitted
Transferees” shall mean a person or entity to whom a Holder of Registrable Securities is permitted to transfer such
Registrable Securities prior to the expiration of the Founder Lock-up Period or Private Placement Lock-up Period, as the case
may be, under the Insider Letter or the LT & Co. Agreement, as the case may be.


 


“Piggyback
Registration” shall have the meaning given in subsection 2.2.1.


  


“Private
Placement Lock-up Period” shall mean, with respect to Private Placement Shares, Private Placement Rights and
Private Placement Warrants that are held by the initial purchasers of such Private Placement Shares, Private Placement Rights
and Private Placement Warrants or their Permitted Transferees, and any of the Common Stock issued or issuable upon
the exercise or conversion of the Private Placement Warrants or Private Placement Rights, respectively, and that are held
by the initial purchasers of the Private Placement Warrants or Private Placement Rights, respectively, or their Permitted
Transferees, the period ending 30 days after the completion of the Company’s initial Business Combination except in
each case for transfers to Permitted Transferees.


 






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“Private
Placement Rights” shall have the meaning given in the Recitals hereto.


 


“Private
Placement Shares” shall have the meaning given in the Recitals hereto.


  


“Private
Placement Warrants” shall have the meaning given in the Recitals hereto.


 


“Pro
Rata” shall have the meaning given in Section 2.4.1.


 


“Prospectus”
shall mean the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements and as
amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus.


 


“Prospectus
Date” shall mean the date of the final prospectus filed with the Commission and relating to the Company’s
initial public offering.


 


“Registrable
Security” shall mean (a) the Founder Shares, (b) the Private Placement Shares, (c) the Private Placement
Rights (including any shares of Common Stock issued or issuable upon conversion of any such Private Placement Rights),
(d) the Private Placement Warrants (including any shares of Common Stock issued or issuable upon the exercise of any
such Private Placement Warrants), (e) any outstanding share of the Common Stock or any other equity security (including
the shares of the Common Stock issued or issuable upon the exercise of any other equity security) of the Company held by a
Holder as of the date of this Agreement, (f) any equity securities (including the shares of Common Stock issued or
issuable upon the exercise of any such equity security) of the Company issuable upon conversion of any working capital loans
made, or to be made, to the Company by a Holder, and (g) any other equity security of the Company issued or issuable
with respect to any such share of the Common Stock by way of a stock dividend or stock split or in connection with a
combination of shares, recapitalization, merger, consolidation or reorganization; provided, however,
that, as to any particular Registrable Security, such securities shall cease to be Registrable Securities when:
(A) a Registration Statement with respect to the sale of such securities shall have become effective under the
Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance with such
Registration Statement; (B) such securities shall have been otherwise transferred, new certificates for such securities
not bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution
of such securities shall not require registration under the Securities Act; (C) such securities shall have ceased to
be outstanding; (D) such securities may be sold without registration pursuant Rule 144 promulgated under the Securities
Act (but with no volume or other restrictions or limitations); or (E) such securities have been sold to, or through,
a broker, dealer or underwriter in a public distribution or other public securities transaction.


 


“Registration”
shall mean a registration effected by preparing and filing a registration statement or similar document in compliance with the
requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and such registration statement
becoming effective.


   


“Registration
Expenses” shall mean the out-of-pocket expenses of a Registration, including, without limitation, the following:


 


(A)
all registration and filing fees (including fees with respect to filings required to be made with the Financial Industry Regulatory
Authority) and any securities exchange on which the Common Stock is then listed;


 


(B)
fees and expenses of compliance with securities or blue sky laws (including reasonable fees and disbursements of counsel for the
Underwriters in connection with blue sky qualifications of Registrable Securities);


 


(C) printing,
messenger, telephone and delivery expenses;


 


(D) reasonable
fees and disbursements of counsel for the Company;


 


(E)
reasonable fees and disbursements of all independent registered public accountants of the Company incurred specifically in connection
with such Registration; and


 






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(F)
reasonable fees and expenses of one (1) legal counsel selected by the majority-in-interest of the Demanding Holders initiating
a Demand Registration to be registered for offer and sale in the applicable Registration.


 


“Registration
Statement” shall mean any registration statement that covers the Registrable Securities pursuant to the provisions
of this Agreement, including the Prospectus included in such registration statement, amendments (including post-effective amendments)
and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such registration
statement.


 


“Requesting
Holder” shall have the meaning given in subsection 2.1.1.


 


“Securities
Act” shall mean the Securities Act of 1933, as amended from time to time.


 


“Sponsor”
shall have the meaning given in the Recitals hereto.


 


“Sponsor
Agreement” shall have the meaning given in the Recitals hereto.


 


“Underwriter”
shall mean a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as part
of such dealer’s market-making activities.


 


“Underwritten
Registration” or “Underwritten Offering” shall mean a Registration in which securities
of the Company are sold to an Underwriter in a firm commitment underwriting for distribution to the public.


 


ARTICLE
II


REGISTRATIONS


 


2.1 Demand
Registration.


 


2.1.1 Request
for Registration. Subject to the provisions of subsection 2.1.4 and Section 2.4 hereof,
at any time and from time to time on or after the date the Company consummates the Business Combination, the Holders of at least
a majority in interest of the then outstanding number of Registrable Securities (the “Demanding Holders”)
may make a written demand for Registration under the Securities Act of all or part of their Registrable Securities, which written
demand shall describe the amount and type of securities to be included in such Registration and the intended method(s) of distribution
thereof (such written demand a “Demand Registration”). The Company shall, within ten (10) days
of the Company’s receipt of the Demand Registration, notify, in writing, all other Holders of Registrable Securities of
such demand, and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s
Registrable Securities in a Registration pursuant to a Demand Registration (each such Holder that includes all or a portion of
such Holder’s Registrable Securities in such Registration, a “Requesting Holder”) shall so notify
the Company, in writing, within five (5) days after the receipt by the Holder of the notice from the Company. Upon receipt
by the Company of any such written notification from a Requesting Holder(s) to the Company, such Requesting Holder(s) shall be
entitled to have their Registrable Securities included in a Registration pursuant to a Demand Registration and the Company shall
effect, as soon thereafter as practicable, but not more than forty five (45) days immediately after the Company’s receipt
of the Demand Registration, the Registration of all Registrable Securities requested by the Demanding Holders and Requesting Holders
pursuant such the Demand Registration. Under no circumstances shall the Company be obligated to effect more than an aggregate
of three (3) Registrations pursuant to a Demand Registration under this subsection 2.1.1 with respect to
any or all Registrable Securities; provided, however, that a Registration shall not be counted for such
purposes unless a Form S-1 or any similar long-form registration statement that may be available at such time (“Form
S-1”) has become effective and all of the Registrable Securities requested by the Requesting Holders to be registered
on behalf of the Requesting Holders in such Form S-1 Registration have been sold, in accordance with Section 3.1 of
this Agreement.


  






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2.1.2 Effective
Registration. Notwithstanding the provisions of subsection 2.1.1 above or any other part of this Agreement,
a Registration pursuant to a Demand Registration shall not count as a Registration unless and until (i) the Registration
Statement filed with the Commission with respect to a Registration pursuant to a Demand Registration has been declared effective
by the Commission and (ii) the Company has complied with all of its obligations under this Agreement with respect thereto; provided, further,
that if, after such Registration Statement has been declared effective, an offering of Registrable Securities in a Registration
pursuant to a Demand Registration is subsequently interfered with by any stop order or injunction of the Commission, federal or
state court or any other governmental agency the Registration Statement with respect to such Registration shall be deemed not
to have been declared effective, unless and until, (i) such stop order or injunction is removed, rescinded or otherwise terminated,
and (ii) a majority-in-interest of the Demanding Holders initiating such Demand Registration thereafter affirmatively elect
to continue with such Registration and accordingly notify the Company in writing, but in no event later than five (5) days,
of such election; and, provided, further, that the Company shall not be obligated or required to file
another Registration Statement until the Registration Statement that has been previously filed with respect to a Registration
pursuant to a Demand Registration becomes effective or is subsequently terminated.


 


2.1.3 Underwritten
Offering. Subject to the provisions of subsection 2.1.4 and Section 2.4 hereof, if a majority-in-interest
of the Demanding Holders so advise the Company as part of their Demand Registration that the offering of the Registrable Securities
pursuant to such Demand Registration shall be in the form of an Underwritten Offering, then the right of such Demanding Holder
or Requesting Holder (if any) to include its Registrable Securities in such Registration shall be conditioned upon such Holder’s
participation in such Underwritten Offering and the inclusion of such Holder’s Registrable Securities in such Underwritten
Offering to the extent provided herein. All such Holders proposing to distribute their Registrable Securities through an Underwritten
Offering under this subsection 2.1.3 shall enter into an underwriting agreement in customary form with the Underwriter(s)
selected for such Underwritten Offering by the majority-in-interest of the Demanding Holders initiating the Demand Registration.


 


2.1.4 Reduction
of Underwritten Offering. If the managing Underwriter or Underwriters in an Underwritten Registration pursuant to a Demand
Registration, in good faith, advises the Company, the Demanding Holders and the Requesting Holders (if any) in writing that the
dollar amount or number of Registrable Securities that the Demanding Holders and the Requesting Holders (if any) desire to sell,
taken together with all other Common Stock or other equity securities that the Company desires to sell and the Common Stock, if
any, as to which a Registration has been requested pursuant to separate written contractual piggy-back registration rights held
by any other stockholders who desire to sell, exceeds the maximum dollar amount or maximum number of equity securities that can
be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the distribution method,
or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable,
the “Maximum Number of Securities”), then the Company shall include in such Underwritten Offering, as
follows: (i) first, the Registrable Securities of the Demanding Holders and the Requesting Holders (if any) (pro rata based
on the respective number of Registrable Securities that each Demanding Holder and Requesting Holder (if any) has requested be
included in such Underwritten Registration and the aggregate number of Registrable Securities that the Demanding Holders and Requesting
Holders have collectively requested be included in such Underwritten Registration (such proportion is referred to herein as “Pro
Rata”)) that can be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent that
the Maximum Number of Securities has not been reached under the foregoing clause (i), the Common Stock or other equity securities
that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; and (iii) third,
to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), the Common
Stock or other equity securities of other persons or entities that the Company is obligated to register in a Registration pursuant
to separate written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number of Securities.


 


2.1.5 Demand
Registration Withdrawal. A majority-in-interest of the Demanding Holders initiating a Demand Registration or a majority-in-interest
of the Requesting Holders (if any), pursuant to a Registration under subsection 2.1.1 shall have the right to
withdraw from a Registration pursuant to such Demand Registration for any or no reason whatsoever upon written notification to
the Company and the Underwriter or Underwriters (if any) of their intention to withdraw from such Registration prior to the effectiveness
of the Registration Statement filed with the Commission with respect to the Registration of their Registrable Securities pursuant
to such Demand Registration. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for
the Registration Expenses incurred in connection with a Registration pursuant to a Demand Registration prior to its withdrawal
under this subsection 2.1.5.


 






    	 	5	 



     


    

 


2.2 Piggyback
Registration.


 


2.2.1 Piggyback
Rights. If, at any time on or after the date the Company consummates a Business Combination, the Company proposes to file
a Registration Statement under the Securities Act with respect to an offering of equity securities, or securities or other obligations
exercisable or exchangeable for, or convertible into equity securities, for its own account or for the account of stockholders
of the Company (or by the Company and by the stockholders of the Company including, without limitation, pursuant to Section 2.1 hereof),
other than a Registration Statement (i) filed in connection with any employee stock option or other benefit plan, (ii) for
an exchange offer or offering of securities solely to the Company’s existing stockholders, (iii) for an offering of
debt that is convertible into equity securities of the Company or (iv) for a dividend reinvestment plan, then the Company
shall give written notice of such proposed filing to all of the Holders of Registrable Securities as soon as practicable but not
less than ten (10) days before the anticipated filing date of such Registration Statement, which notice shall (A) describe
the amount and type of securities to be included in such offering, the intended method(s) of distribution, and the name of the
proposed managing Underwriter or Underwriters, if any, in such offering, and (B) offer to all of the Holders of Registrable
Securities the opportunity to register the sale of such number of Registrable Securities as such Holders may request in writing
within five (5) days after receipt of such written notice (such Registration a “ Piggyback Registration”).
The Company shall, in good faith, cause such Registrable Securities to be included in such Piggyback Registration and shall use
its reasonable best efforts to cause the managing Underwriter or Underwriters of a proposed Underwritten Offering to permit the
Registrable Securities requested by the Holders pursuant to this subsection 2.2.1 to be included in a Piggyback Registration on
the same terms and conditions as any similar securities of the Company included in such Registration and to permit the sale or
other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. All such Holders
proposing to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.2.1 shall
enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the
Company.


 


2.2.2 Reduction
of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten Registration that is to be a Piggyback
Registration, in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration
in writing that the dollar amount or number of the Common Stock that the Company desires to sell, taken together with (i) the
Common Stock, if any, as to which Registration has been demanded pursuant to separate written contractual arrangements with persons
or entities other than the Holders of Registrable Securities hereunder (ii) the Registrable Securities as to which registration
has been requested pursuant Section 2.2 hereof, and (iii) the Common Stock, if any, as to which Registration
has been requested pursuant to separate written contractual piggy-back registration rights of other stockholders of the Company,
exceeds the Maximum Number of Securities, then:


 


(a)
If the Registration is undertaken for the Company’s account, the Company shall include in any such Registration (A) first,
the Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum
Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing
clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection
2.2.1 hereof, Pro Rata, which can be sold without exceeding the Maximum Number of Securities; and (C) third, to
the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the Common
Stock, if any, as to which Registration has been requested pursuant to written contractual piggy-back registration rights of other
stockholders of the Company, which can be sold without exceeding the Maximum Number of Securities; 


 


(b)
If the Registration is pursuant to a request by persons or entities other than the Holders of Registrable Securities, then the
Company shall include in any such Registration (A) first, the Common Stock or other equity securities, if any, of such requesting
persons or entities, other than the Holders of Registrable Securities, which can be sold without exceeding the Maximum Number
of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause
(A), the Common Stock or other equity securities that the Company desires to sell , which can be sold without exceeding the Maximum
Number of Securities; (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing
clauses (A) and (B), the Registrable Securities of Holders exercising their rights to register their Registrable Securities
pursuant to subsection 2.2.1, pro rata based on the number of Registrable Securities that each Holder has requested
be included in such Underwritten Registration and the aggregate number of Registrable Securities that the Holders have requested
to be included in such Underwritten Registration, which can be sold without exceeding the Maximum Number of Securities; and (D) fourth,
to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C), the
Common Stock or other equity securities for the account of other persons or entities that the Company is obligated to register
pursuant to separate written contractual arrangements with such persons or entities, which can be sold without exceeding the Maximum
Number of Securities.


 






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2.2.3 Piggyback
Registration Withdrawal. Any Holder of Registrable Securities shall have the right to withdraw from a Piggyback Registration
for any or no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of his,
her or its intention to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed
with the Commission with respect to such Piggyback Registration. The Company (whether on its own good faith determination or as
the result of a request for withdrawal by persons pursuant to separate written contractual obligations) may withdraw a Registration
Statement filed with the Commission in connection with a Piggyback Registration at any time prior to the effectiveness of such
Registration Statement. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration
Expenses incurred in connection with the Piggyback Registration prior to its withdrawal under this subsection 2.2.3.


 


2.2.4 Unlimited
Piggyback Registration Rights. For purposes of clarity, any Registration effected pursuant to Section 2.2 hereof
shall not be counted as a Registration pursuant to a Demand Registration effected under Section 2.1 hereof.


  


2.3 Registrations
on Form S-3. The Holders of Registrable Securities may at any time, and from time to time, request in writing that the Company,
pursuant to Rule 415 under the Securities Act (or any successor rule promulgated thereafter by the Commission), register the resale
of any or all of their Registrable Securities on Form S-3 or any similar short-form registration statement that may be available
at such time (“Form S-3”); provided, however, that the Company shall not be
obligated to effect such request through an Underwritten Offering. Within five (5) days of the Company’s receipt of
a written request from a Holder or Holders of Registrable Securities for a Registration on Form S-3, the Company shall promptly
give written notice of the proposed Registration on Form S-3 to all other Holders of Registrable Securities, and each Holder of
Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such
Registration on Form S-3 shall so notify the Company, in writing, within ten (10) days after the receipt by the Holder of
the notice from the Company. As soon as practicable thereafter, but not more than twelve (12) days after the Company’s
initial receipt of such written request for a Registration on Form S-3, the Company shall register all or such portion of such
Holder’s Registrable Securities as are specified in such written request, together with all or such portion of Registrable
Securities of any other Holder or Holders joining in such request as are specified in the written notification given by such Holder
or Holders; provided, however, that the Company shall not be obligated to effect any such Registration
pursuant to Section 2.3 hereof if (i) a Form S-3 is not available for such offering; or (ii) the Holders
of Registrable Securities, together with the Holders of any other equity securities of the Company entitled to inclusion in such
Registration, propose to sell the Registrable Securities and such other equity securities (if any) at any aggregate price to the
public of less than $5,000,000.


 


2.4 Restrictions
on Registration Rights. If (A) during the period starting with the date sixty (60) days prior to the Company’s
good faith estimate of the date of the filing of, and ending on a date one hundred and twenty (120) days after the effective
date of, a Company initiated Registration and provided that the Company has delivered written notice to the Holders prior to receipt
of a Demand Registration pursuant to subsection 2.1.1 and it continues to actively employ, in good faith, all
reasonable efforts to cause the applicable Registration Statement to become effective; (B) the Holders have requested an
Underwritten Registration and the Company and the Holders are unable to obtain the commitment of underwriters to firmly underwrite
the offer; or (C) in the good faith judgment of the Board such Registration would be seriously detrimental to the Company
and the Board concludes as a result that it is essential to defer the filing of such Registration Statement at such time, then
in each case the Company shall furnish to such Holders a certificate signed by the Chairman of the Board stating that in the good
faith judgment of the Board it would be seriously detrimental to the Company for such Registration Statement to be filed in the
near future and that it is therefore essential to defer the filing of such Registration Statement. In such event, the Company
shall have the right to defer such filing for a period of not more than thirty (30) days; provided, however,
that the Company shall not defer its obligation in this manner more than once in any 12-month period.


 






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ARTICLE
III


COMPANY
PROCEDURES


 


3.1 General
Procedures. If at any time on or after the date the Company consummates a Business Combination the Company is required to
effect the Registration of Registrable Securities, the Company shall use its reasonable best efforts to effect such Registration
to permit the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto
the Company shall, as expeditiously as possible:


 


3.1.1
prepare and file with the Commission as soon as practicable a Registration Statement with respect to such Registrable Securities
and use its reasonable best efforts to cause such Registration Statement to become effective and remain effective until all Registrable
Securities covered by such Registration Statement have been sold;


 


3.1.2
prepare and file with the Commission such amendments and post-effective amendments to the Registration Statement, and such supplements
to the Prospectus, as may be requested by the Holders or any Underwriter of Registrable Securities or as may be required by the
rules, regulations or instructions applicable to the registration form used by the Company or by the Securities Act or rules and
regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration
Statement are sold in accordance with the intended plan of distribution set forth in such Registration Statement or supplement
to the Prospectus;


 


3.1.3
prior to filing a Registration Statement or prospectus, or any amendment or supplement thereto, furnish without charge to the
Underwriters, if any, and the Holders of Registrable Securities included in such Registration, and such Holders’ legal counsel,
copies of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement (in
each case including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration
Statement (including each preliminary Prospectus), and such other documents as the Underwriters and the Holders of Registrable
Securities included in such Registration or the legal counsel for any such Holders may request in order to facilitate the disposition
of the Registrable Securities owned by such Holders;


 


3.1.4
prior to any public offering of Registrable Securities, use its reasonable best efforts to (i) register or qualify the Registrable
Securities covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in
the United States as the Holders of Registrable Securities included in such Registration Statement (in light of their intended
plan of distribution) may request and (ii) take such action necessary to cause such Registrable Securities covered by the
Registration Statement to be registered with or approved by such other governmental authorities as may be necessary by virtue
of the business and operations of the Company and do any and all other acts and things that may be necessary or advisable to enable
the Holders of Registrable Securities included in such Registration Statement to consummate the disposition of such Registrable
Securities in such jurisdictions; provided, however, that the Company shall not be required to qualify
generally to do business in any jurisdiction where it would not otherwise be required to qualify or take any action to which it
would be subject to general service of process or taxation in any such jurisdiction where it is not then otherwise so subject; 


 


3.1.5
cause all such Registrable Securities to be listed on each securities exchange or automated quotation system on which similar
securities issued by the Company are then listed;


 


3.1.6
provide a transfer agent, rights agent or warrant agent, as applicable, and registrar for all such Registrable Securities no
later than the effective date of such Registration Statement;


 


3.1.7
advise each seller of such Registrable Securities, promptly after it shall receive notice or obtain knowledge thereof, of the
issuance of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or
threatening of any proceeding for such purpose and promptly use its reasonable best efforts to prevent the issuance of any stop
order or to obtain its withdrawal if such stop order should be issued;


 


3.1.8
at least five (5) days prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to
such Registration Statement or Prospectus or any document that is to be incorporated by reference into such Registration Statement
or Prospectus, furnish a copy thereof to each seller of such Registrable Securities or its counsel;


 






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3.1.9
notify the Holders at any time when a Prospectus relating to such Registration Statement is required to be delivered under the
Securities Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as
then in effect, includes a Misstatement, and then to correct such Misstatement as set forth in Section 3.4 hereof;


 


3.1.10
permit a representative of the Holders (such representative to be selected by a majority of the Holders), the Underwriters, if
any, and any attorney or accountant retained by such Holders or Underwriter to participate, at each such person’s own expense,
in the preparation of the Registration Statement, and cause the Company’s officers, directors and employees to supply all
information reasonably requested by any such representative, Underwriter, attorney or accountant in connection with the Registration; provided, however,
that such representatives or Underwriters enter into a confidentiality agreement, in form and substance reasonably satisfactory
to the Company, prior to the release or disclosure of any such information;


 


3.1.11
obtain a “cold comfort” letter from the Company’s independent registered public accountants in the event of
an Underwritten Registration which the participating Holders may rely on, in customary form and covering such matters of the type
customarily covered by “cold comfort” letters as the managing Underwriter may reasonably request, and reasonably satisfactory
to a majority-in-interest of the participating Holders;


 


3.1.12
on the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date,
of counsel representing the Company for the purposes of such Registration, addressed to the Holders, the placement agent or sales
agent, if any, and the Underwriters, if any, covering such legal matters with respect to the Registration in respect of which
such opinion is being given as the Holders, placement agent, sales agent, or Underwriter may reasonably request and as are customarily
included in such opinions and negative assurance letters, and reasonably satisfactory to a majority in interest of the participating
Holders;


 


3.1.13
in the event of any Underwritten Offering, enter into and perform its obligations under an underwriting agreement, in usual and
customary form, with the managing Underwriter of such offering;


 


3.1.14
make available to its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least
twelve (12) months beginning with the first day of the Company’s first full calendar quarter after the effective date
of the Registration Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder;


  


3.1.15
if the Registration involves the Registration of Registrable Securities involving gross proceeds in excess of $25,000,000, use
its reasonable efforts to make available senior executives of the Company to participate in customary “road show”
presentations that may be reasonably requested by the Underwriter in any Underwritten Offering; and


 


3.1.16
otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the Holders,
in connection with such Registration.


 


3.2 Registration
Expenses. The Registration Expenses of all Registrations shall be borne by the Company. It is acknowledged by the Holders
that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’
commissions and discounts, brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration
Expenses,” all reasonable fees and expenses of any legal counsel representing the Holders.


 


3.3 Requirements
for Participation in Underwritten Offerings. No person may participate in any Underwritten Offering for equity securities
of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s
securities on the basis provided in any underwriting arrangements approved by the Company and (ii) completes and executes
all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary
documents as may be reasonably required under the terms of such underwriting arrangements.


 






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3.4 Suspension
of Sales; Adverse Disclosure. Upon receipt of written notice from the Company that a Registration Statement or Prospectus
contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received
copies of a supplemented or amended Prospectus correcting the Misstatement (it being understood that the Company hereby covenants
to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until it is advised
in writing by the Company that the use of the Prospectus may be resumed. If the filing, initial effectiveness or continued use
of a Registration Statement in respect of any Registration at any time would require the Company to make an Adverse Disclosure
or would require the inclusion in such Registration Statement of financial statements that are unavailable to the Company for
reasons beyond the Company’s control, the Company may, upon giving prompt written notice of such action to the Holders,
delay the filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period of time,
but in no event more than thirty (30) days, determined in good faith by the Company to be necessary for such purpose. In
the event the Company exercises its rights under the preceding sentence, the Holders agree to suspend, immediately upon their
receipt of the notice referred to above, their use of the Prospectus relating to any Registration in connection with any sale
or offer to sell Registrable Securities. The Company shall immediately notify the Holders of the expiration of any period during
which it exercised its rights under this Section 3.4.


 


3.5 Reporting
Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times while it shall be reporting
under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace
period) all reports required to be filed by the Company after the date hereof pursuant to Sections 13(a) or 15(d) of the Exchange
Act and to promptly furnish the Holders with true and complete copies of all such filings. The Company further covenants that
it shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable
such Holder to sell shares of the Common Stock held by such Holder without registration under the Securities Act within the limitation
of the exemptions provided by Rule 144 promulgated under the Securities Act, including providing any legal opinions. Upon the
request of any Holder, the Company shall deliver to such Holder a written certification of a duly authorized officer as to whether
it has complied with such requirements.


 


3.6 Limitations
on Registration Rights. Notwithstanding anything herein to the contrary, (i) LT & Co. may not exercise its rights
under Sections 2.1 and 2.2 hereunder after five (5) and seven (7) years after the effective date of the registration statement
relating to the Company’s initial public offering, respectively, and (ii) LT & Co. may not exercise its rights under
Section 2.1 more than one time.


 


ARTICLE
IV


INDEMNIFICATION
AND CONTRIBUTION


 


4.1 Indemnification.


 


4.1.1
The Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers and directors
and each person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities
and expenses (including attorneys’ fees) caused by any untrue or alleged untrue statement of material fact contained in
any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission
or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading,
except insofar as the same are caused by or contained in any information furnished in writing to the Company by such Holder expressly
for use therein. The Company shall indemnify the Underwriters, their officers and directors and each person who controls such
Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to the indemnification
of the Holder.


 


4.1.2
In connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall
furnish to the Company in writing such information and affidavits as the Company reasonably requests for use in connection with
any such Registration Statement or Prospectus and, to the extent permitted by law, shall indemnify the Company, its directors
and officers and agents and each person who controls the Company (within the meaning of the Securities Act) against any losses,
claims, damages, liabilities and expenses (including without limitation reasonable attorneys’ fees) resulting from any untrue
statement of material fact contained in the Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof
or supplement thereto or any omission of a material fact required to be stated therein or necessary to make the statements therein
not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so
furnished in writing by such Holder expressly for use therein; provided, however, that the obligation
to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each
such Holder of Registrable Securities shall be in proportion to and limited to the net proceeds received by such Holder from the
sale of Registrable Securities pursuant to such Registration Statement. The Holders of Registrable Securities shall indemnify
the Underwriters, their officers, directors and each person who controls such Underwriters (within the meaning of the Securities
Act) to the same extent as provided in the foregoing with respect to indemnification of the Company.


 






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4.1.3
Any person entitled to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim
with respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s
right to indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party) and (ii) unless
in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties
may exist with respect to such claim, permit such indemnifying party to assume the defense of such claim with counsel reasonably
satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability
for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld or delayed).
An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the
fees and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect to such claim (other
than local counsel), unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such
indemnified party and any other of such indemnified parties with respect to such claim. No indemnifying party shall, without the
consent of the indemnified party, consent to the entry of any judgment or enter into any settlement which cannot be settled in
all respects by the payment of money (and such money is so paid by the indemnifying party pursuant to the terms of such settlement)
or which settlement does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified
party of a release from all liability in respect to such claim or litigation.


 


4.1.4
The indemnification provided for under this Agreement shall remain in full force and effect regardless of any investigation made
by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive
the transfer of securities. The Company and each Holder of Registrable Securities participating in an offering also agrees to
make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Company’s
or such Holder’s indemnification is unavailable for any reason.


   


4.1.5
If the indemnification provided under Section 4.1 hereof from the indemnifying party is unavailable or insufficient
to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein,
then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable by
the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate
to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations.
The relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether
any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to
state a material fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the
indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to
correct or prevent such action; provided, however, that the liability of any Holder under this subsection
4.1.5 shall be limited to the amount of the net proceeds received by such Holder in such offering giving rise to such
liability. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed
to include, subject to the limitations set forth in subsections 4.1.1, 4.1.2 and 4.1.3 above,
any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding.
The parties hereto agree that it would not be just and equitable if contribution pursuant to this subsection 4.1.5 were
determined by pro rata allocation or by any other method of allocation, which does not take account of the equitable considerations
referred to in this subsection 4.1.5. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f)
of the Securities Act) shall be entitled to contribution pursuant to this subsection 4.1.5 from any person who
was not guilty of such fraudulent misrepresentation.


 






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ARTICLE
V


MISCELLANEOUS


 


5.1 Notices.
Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed
to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in
person or by courier service providing evidence of delivery, or (iii) transmission by hand delivery or facsimile. Each notice
or communication that is mailed, delivered, or transmitted in the manner described above shall be deemed sufficiently given, served,
sent, and received, in the case of mailed notices, on the third business day following the date on which it is mailed and, in
the case of notices delivered by courier service, hand delivery or facsimile, at such time as it is delivered to the addressee
(with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation.
Any notice or communication under this Agreement must be addressed to the Company at 527 Stanton Christiana Rd., Newark, DE 19713,
Attn: Marlene Krauss, M.D. and to the Holder, at such Holder’s address as found in the Company’s books and records.
Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and
such change of address shall become effective thirty (30) days after delivery of such notice as provided in this Section
5.1.


 


5.2 Assignment;
No Third Party Beneficiaries.


 


5.2.1
This Agreement and the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company
in whole or in part.


 


5.2.2
Prior to the expiration of the Founder Lock-up Period or the Private Placement Lock-up Period, as the case may be, no Holder may
assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, except in connection
with a transfer of Registrable Securities by such Holder to a Permitted Transferee, but only if such Permitted Transferee agrees
to become bound by the transfer restrictions set forth in this Agreement and other applicable letter agreements.


 


5.2.3
This Agreement and the provisions hereof shall be binding upon and shall inure to the benefit of each of the parties and its successors
and the permitted assigns of the Holders; which shall include Permitted Transferees.


 


5.2.4
This Agreement shall not confer any rights or benefits on any persons that are not parties hereto, other than as expressly set
forth in this Agreement and Section 5.2 hereof.


 


5.2.5
No assignment by any party hereto of such party’s rights, duties and obligations hereunder shall be binding upon or obligate
the Company unless and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1 hereof
and (ii) the written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound by the terms
and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement). Any transfer
or assignment made other than as provided in this Section 5.2 shall be null and void.


 


5.3 Counterparts.
This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed
an original, and all of which together shall constitute the same instrument, but only one of which need be produced.


 


5.4 Governing
Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE PARTIES EXPRESSLY
AGREE THAT THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF DELAWARE AS APPLIED TO AGREEMENTS
AMONG DELAWARE RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN DELAWARE, WITHOUT REGARD TO THE CONFLICT OF LAW PROVISIONS
OF SUCH JURISDICTION. THE VENUE FOR ANY ACTION TAKEN WITH RESPECT TO THIS AGREEMENT SHALL BE ANY FORUM WITHIN THE STATE OF DELAWARE.


 






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5.5 Amendments
and Modifications. Upon the written consent of the Company and the Holders of at least a majority in interest (which
majority must include LT & Co. if such amendment or modification affects the rights of LT & Co.) of the Registrable Securities
at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived,
or any of such provisions, covenants or conditions may be amended or modified; provided, however, that
notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in its capacity
as a holder of the shares of capital stock of the Company, in a manner that is materially different from the other Holders (in
such capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and
any other party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under
this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise
of any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights
or remedies hereunder or thereunder by such party.


 


5.6 Other
Registration Rights. The Company represents and warrants that no person, other than a Holder of Registrable Securities, has
any right to require the Company to register any securities of the Company for sale or to include such securities of the Company
in any Registration filed by the Company for the sale of securities for its own account or for the account of any other person.
Further, the Company represents and warrants that this Agreement supersedes any other registration rights agreement or agreement
with similar terms and conditions and in the event of a conflict between any such agreement or agreements and this Agreement,
the terms of this Agreement shall prevail.


 


5.7 Term.
This Agreement shall terminate upon the earlier of (i) the tenth anniversary of the date of this Agreement or (ii) the
date as of which (A) all of the Registrable Securities have been sold pursuant to a Registration Statement (but in no event
prior to the applicable period referred to in Section 4(3) of the Securities Act and Rule 174 thereunder) or (B) the
Holders of all Registrable Securities are permitted to sell the Registrable Securities under Rule 144 (or any similar provision)
under the Securities Act without limitation on the amount of securities sold or the manner of sale. The provisions of Section 3.5 and Article
IV shall survive any termination.


 


[SIGNATURE
PAGE FOLLOWS]


 









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IN
WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of the date first written above.


 


	 	COMPANY:
	 	 
	 	KBL
    MERGER CORP. IV,
	 	a
    Delaware corporation
	 	 	 
	 	By:	 
	 	 	Name:
    Marlene Krauss, M.D.
	 	 	Title:  Chief
    Executive Officer


 


	 	HOLDERS:
	 	 	 
	 	KBL
    IV SPONSOR LLC
	 	a
    Delaware limited liability company
	 	 	 
	 	By:	 
	 	 	Name:
    Marlene Krauss, M.D.
	 	 	Title:
    Managing Member
	 	 	 
	 	Ladenburg
    Thalmann & Co., Inc.
	 	 
	 	By:	 
	 	 	Name:
    
	 	 	Title:
    


 


[Signature
Page to Registration Rights Agreement]


 


14