Exhibit 10.2


 


REGISTRATION RIGHTS AGREEMENT


 


THIS REGISTRATION RIGHTS AGREEMENT (this
“Agreement”) is entered into as of the 2nd day of July, 2018, by and among Allegro Merger
Corp., a Delaware corporation (the “Company”) and the undersigned parties listed under Investor on the
signature page hereto (each, an “Investor” and collectively, the “Investors”).


 


WHEREAS, the Investors and the Company desire
to enter into this Agreement to provide the Investors with certain rights relating to the registration of the securities held by
them as of the date hereof;


 


NOW, THEREFORE, in consideration of the
mutual covenants and agreements set forth herein, and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto agree as follows:


 


1. DEFINITIONS. The following capitalized
terms used herein have the following meanings:


 


“Agreement” means
this Agreement, as amended, restated, supplemented, or otherwise modified from time to time.


 


“Business Combination”
means the acquisition of direct or indirect ownership through a merger, share exchange, asset acquisition, share purchase, recapitalization,
reorganization or other similar type of transaction, of one or more businesses or entities.


 


“Cantor” is defined
in Section 2.1.1.


 


“Chardan” is defined
in Section 2.1.1.


 


“Commission” means
the Securities and Exchange Commission, or any other Federal agency then administering the Securities Act or the Exchange Act.


 


“Common Stock”
means the common stock, par value $0.0001 per share, of the Company.


 


“Company” is defined
in the preamble to this Agreement.


 


“Demand Registration”
is defined in Section 2.1.1.


 


“Demanding Holder”
is defined in Section 2.1.1.


 


“Exchange Act”
means the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder,
all as the same shall be in effect at the time.


 






     


     


    

 


“Form S-3” is
defined in Section 2.3.


 


“Indemnified Party”
is defined in Section 4.3.


 


“Indemnifying Party”
is defined in Section 4.3.


 


“Initial Shares”
means all of the outstanding shares of Common Stock of the Company issued prior to the consummation of its initial public offering.


  


“Investor” is
defined in the preamble to this Agreement.


 


“Investor Indemnified Party”
is defined in Section 4.1.


 


“Maximum Number of Shares”
is defined in Section 2.1.4.


 


“Notices” is defined
in Section 6.3.


 


“Piggy-Back Registration”
is defined in Section 2.2.1.


 


“Private Units”
means the Units the Investors are privately purchasing simultaneously with the consummation of the Company’s initial public
offering.


 


“Pro Rata” is
defined in Section 2.1.4.


 


“Register,” “Registered”
and “Registration” 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.


 


“Registrable Securities”
means (i) the Initial Shares, (ii) the Private Units (and underlying securities), and (iii) the Working Capital Units (and underlying
securities), if any. Registrable Securities include any warrants, shares of capital stock or other securities of the Company issued
as a dividend or other distribution with respect to or in exchange for or in replacement of such Initial Shares, Private Units
(and underlying securities) and Working Capital Units (and underlying securities). As to any particular Registrable Securities,
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
them not bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution
of them shall not require registration under the Securities Act; (c) such securities shall have ceased to be outstanding, or (d)
the Registrable Securities are freely saleable under Rule 144 without volume limitations.


 






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“Registration Statement”
means a registration statement filed by the Company with the Commission in compliance with the Securities Act and the rules and
regulations promulgated thereunder for a public offering and sale of equity securities, or securities or other obligations exercisable
or exchangeable for, or convertible into, equity securities (other than a registration statement on Form S-4 or Form S-8, or their
successors, or any registration statement covering only securities proposed to be issued in exchange for securities or assets of
another entity).


 


“Securities Act”
means the Securities Act of 1933, as amended, and the rules and regulations of the Commission promulgated thereunder, all as the
same shall be in effect at the time.


 


“Underwriter”
means 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.


 


“Units” means
the units of the Company, each comprised of one share of Common Stock and one warrant to purchase one share of Common Stock.


 


“Working Capital Units”
means any Units held by Investors, officers or directors of the Company or their affiliates which may be issued in payment of working
capital loans made to the Company.


 


2. REGISTRATION RIGHTS.


 


2.1 Demand Registration.


 


2.1.1 Request for Registration.
At any time and from time to time on or after the date that the Company consummates a Business Combination, (i) the holders of
a majority-in-interest of the Private Units (or underlying securities), Working Capital Units (or underlying securities) or other
Registrable Securities, as the case may be, held by the Investors, officers or directors of the Company or their affiliates, or
the transferees of the Investors, or (ii) Cantor Fitzgerald & Co. (“Cantor”), Chardan Capital Markets,
LLC (“Chardan”) or their designees, may make a written demand for registration under the Securities Act
of all or part of their Private Units (or underlying securities), Working Capital Units (or underlying securities) or other Registrable
Securities, as the case may be (a “Demand Registration”). Any demand for a Demand Registration shall
specify the number of shares of Registrable Securities proposed to be sold and the intended method(s) of distribution thereof.
The Company will notify all holders of Registrable Securities of the demand, and each holder of Registrable Securities who wishes
to include all or a portion of such holder’s Registrable Securities in the Demand Registration (each such holder including
shares of Registrable Securities in such registration, a “Demanding Holder”) shall so notify the Company
within fifteen (15) days after the receipt by the holder of the notice from the Company. Upon any such request, the Demanding Holders
shall be entitled to have their Registrable Securities included in the Demand Registration, subject to Section 2.1.4 and the provisos
set forth in Section 3.1.1. The Company shall not be obligated to effect more than an aggregate of three (3) Demand Registrations
under this Section 2.1.1 in respect of all Registrable Securities including the one (1) Demand Registration on behalf of Cantor
and Chardan.


 






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2.1.2 Effective Registration. A
registration will not count as a Demand Registration until the Registration Statement filed with the Commission with respect to
such Demand Registration has been declared effective and the Company has complied with all of its obligations under this Agreement
with respect thereto; provided, however, that if, after such Registration Statement has been declared effective, the offering of
Registrable Securities pursuant to a Demand Registration is interfered with by any stop order or injunction of the Commission or
any other governmental agency or court, the Registration Statement with respect to such Demand Registration will 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 thereafter elect to continue the offering; provided, further, that the
Company shall not be obligated to file a second Registration Statement until a Registration Statement that has been filed is counted
as a Demand Registration or is terminated. 


 


2.1.3 Underwritten Offering. If
a majority-in-interest of the Demanding Holders so elect and such holders so advise the Company as part of their written demand
for a Demand Registration, the offering of such Registrable Securities pursuant to such Demand Registration shall be in the form
of an underwritten offering. In such event, the right of any holder to include its Registrable Securities in such registration
shall be conditioned upon such holder’s participation in such underwriting and the inclusion of such holder’s Registrable
Securities in the underwriting to the extent provided herein. All Demanding Holders proposing to distribute their Registrable Securities
through such underwriting shall enter into an underwriting agreement in customary form with the Underwriter or Underwriters selected
for such underwriting by a majority-in-interest of the holders initiating the Demand Registration.


 


2.1.4 Reduction of Offering. If
the managing Underwriter or Underwriters for a Demand Registration that is to be an underwritten offering advises the Company and
the Demanding Holders in writing that the dollar amount or number of shares of Registrable Securities which the Demanding Holders
desire to sell, taken together with all other shares of Common Stock or other securities which the Company desires to sell and
the shares of Common Stock, if any, as to which registration has been requested pursuant to written contractual piggy-back registration
rights held by other stockholders of the Company who desire to sell, exceeds the maximum dollar amount or maximum number of shares
that can be sold in such 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 shares, as applicable, the “Maximum
Number of Shares”), then the Company shall include in such registration: (i) first, the Registrable Securities as
to which Demand Registration has been requested by the Demanding Holders (pro rata in accordance with the number of shares that
each such Person has requested be included in such registration, regardless of the number of shares held by each such Person (such
proportion is referred to herein as “Pro Rata”)) that can be sold without exceeding the Maximum Number
of Shares; (ii) second, to the extent that the Maximum Number of Shares has not been reached under the foregoing clause (i), the
shares of Common Stock or other securities that the Company desires to sell that can be sold without exceeding the Maximum Number
of Shares; and (iii) third, to the extent that the Maximum Number of Shares has not been reached under the foregoing clauses (i)
and (ii), the shares of Common Stock or other securities for the account of other persons that the Company is obligated to register
pursuant to written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number of Shares.


 






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2.1.5 Withdrawal. If a majority-in-interest
of the Demanding Holders disapprove of the terms of any underwriting or are not entitled to include all of their Registrable Securities
in any offering, such majority-in-interest of the Demanding Holders may elect to withdraw from such offering by giving written
notice to the Company and the Underwriter or Underwriters of their request to withdraw prior to the effectiveness of the Registration
Statement filed with the Commission with respect to such Demand Registration. If the majority-in-interest of the Demanding Holders
withdraws from a proposed offering relating to a Demand Registration, then such registration shall not count as a Demand Registration
provided for in Section 2.1. 


 


2.2 Piggy-Back Registration.


 


2.2.1 Piggy-Back 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, by the Company for its own account or for shareholders of the Company for their account
(or by the Company and by shareholders of the Company including, without limitation, pursuant to Section 2.1), 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 shareholders, (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 (x) give written notice of such proposed
filing to the holders of Registrable Securities as soon as practicable but in no event less than ten (10) days before the anticipated
filing date, which notice shall 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, of the offering, and (y) offer to the
holders of Registrable Securities in such notice the opportunity to register the sale of such number of shares of Registrable Securities
as such holders may request in writing within five (5) days following receipt of such notice (a “Piggy-Back Registration”).
The Company shall cause such Registrable Securities to be included in such registration and shall use its best efforts to cause
the managing Underwriter or Underwriters of a proposed underwritten offering to permit the Registrable Securities requested to
be included in a Piggy-Back Registration on the same terms and conditions as any similar securities of the Company and to permit
the sale or other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof.
All holders of Registrable Securities proposing to distribute their securities through a Piggy-Back Registration that involves
an Underwriter or Underwriters shall enter into an underwriting agreement in customary form with the Underwriter or Underwriters
selected for such Piggy-Back Registration.


 






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2.2.2 Reduction of Offering. If
the managing Underwriter or Underwriters for a Piggy-Back Registration that is to be an underwritten offering advises the Company
and the holders of Registrable Securities in writing that the dollar amount or number of shares of Common Stock which the Company
desires to sell, taken together with shares of Common Stock, if any, as to which registration has been demanded pursuant to written
contractual arrangements with persons other than the holders of Registrable Securities hereunder, the Registrable Securities as
to which registration has been requested under this Section 2.2, and the shares of Common Stock, if any, as to which registration
has been requested pursuant to the written contractual piggy-back registration rights of other shareholders of the Company, exceeds
the Maximum Number of Shares, then the Company shall include in any such registration:


 


a) If the registration is undertaken
for the Company’s account: (A) first, the shares of Common Stock or other securities that the Company desires to sell that
can be sold without exceeding the Maximum Number of Shares; (B) second, to the extent that the Maximum Number of Shares has not
been reached under the foregoing clause (A), the shares of Common Stock or other securities, if any, comprised of Registrable Securities,
as to which registration has been requested pursuant to the applicable written contractual piggy-back registration rights of such
security holders, Pro Rata, that can be sold without exceeding the Maximum Number of Shares; and (C) third, to the extent that
the Maximum Number of Shares has not been reached under the foregoing clauses (A) and (B), the shares of Common Stock or other
securities for the account of other persons that the Company is obligated to register pursuant to written contractual piggy-back
registration rights with such persons and that can be sold without exceeding the Maximum Number of Shares;


  


b) If the registration is a “demand”
registration undertaken at the demand of persons other than any of the holders of Registrable Securities: (A) first, the shares
of Common Stock or other securities for the account of the demanding persons that can be sold without exceeding the Maximum Number
of Shares; (B) second, to the extent that the Maximum Number of Shares has not been reached under the foregoing clause (A), the
shares of Common Stock or other securities that the Company desires to sell that can be sold without exceeding the Maximum Number
of Shares; (C) third, to the extent that the Maximum Number of Shares has not been reached under the foregoing clauses (A) and
(B), the shares of Common Stock or other securities comprised of Registrable Securities, Pro Rata, as to which registration has
been requested pursuant to the terms hereof, that can be sold without exceeding the Maximum Number of Shares; and (D) fourth, to
the extent that the Maximum Number of Shares has not been reached under the foregoing clauses (A), (B) and (C), the shares of Common
Stock or other securities for the account of other persons that the Company is obligated to register pursuant to written contractual
arrangements with such persons, that can be sold without exceeding the Maximum Number of Shares.


 


2.2.3 Withdrawal. Any holder of
Registrable Securities may elect to withdraw such holder’s request for inclusion of Registrable Securities in any Piggy-Back
Registration by giving written notice to the Company of such request to withdraw prior to the effectiveness of the Registration
Statement. The Company (whether on its own determination or as the result of a withdrawal by persons making a demand pursuant to
written contractual obligations) may withdraw a Registration Statement at any time prior to the effectiveness of such Registration
Statement. Notwithstanding any such withdrawal, the Company shall pay all expenses incurred by the holders of Registrable Securities
in connection with such Piggy-Back Registration as provided in Section 3.3. 


 






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2.2.4 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 register the resale
of any or all of such Registrable Securities on Form S-3 or any similar short-form registration which 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. Upon receipt of such written request, the Company will promptly give written notice of the proposed
registration to all other holders of Registrable Securities, and, as soon as practicable thereafter, effect the registration of
all or such portion of such holder’s or holders’ Registrable Securities as are specified in such request, together
with all or such portion of the Registrable Securities or other securities of the Company, if any, of any other holder or holders
joining in such request as are specified in a written request given within fifteen (15) days after receipt of such written notice
from the Company; provided, however, that the Company shall not be obligated to effect any such registration pursuant to this Section
2.3: (i) if Form S-3 is not available for such offering; or (ii) if the holders of the Registrable Securities, together with the
holders of any other securities of the Company entitled to inclusion in such registration, propose to sell Registrable Securities
and such other securities (if any) at any aggregate price to the public of less than $500,000. Registrations effected pursuant
to this Section 2.3 shall not be counted as Demand Registrations effected pursuant to Section 2.1.


 


3. REGISTRATION PROCEDURES.


 


3.1 Filings; Information. Whenever
the Company is required to effect the registration of any Registrable Securities pursuant to Section 2, the Company shall use its
best efforts to effect the registration and sale of such Registrable Securities in accordance with the intended method(s) of distribution
thereof as expeditiously as practicable, and in connection with any such request:


 


3.1.1 Filing Registration Statement.
The Company shall use its best efforts to, as expeditiously as possible after receipt of a request for a Demand Registration pursuant
to Section 2.1, prepare and file with the Commission a Registration Statement on any form for which the Company then qualifies
or which counsel for the Company shall deem appropriate and which form shall be available for the sale of all Registrable Securities
to be registered thereunder in accordance with the intended method(s) of distribution thereof, and shall use its best efforts to
cause such Registration Statement to become effective and use its best efforts to keep it effective for the period required by
Section 3.1.3; provided, however, that the Company shall have the right to defer any Demand Registration for up to thirty (30)
days, and any Piggy-Back Registration for such period as may be applicable to deferment of any demand registration to which such
Piggy-Back Registration relates, in each case if the Company shall furnish to the holders a certificate signed by the President
or Chairman of the Company stating that, in the good faith judgment of the Board of Directors of the Company, it would be materially
detrimental to the Company and its shareholders for such Registration Statement to be effected at such time; provided further,
however, that the Company shall not have the right to exercise the right set forth in the immediately preceding proviso more than
once in any 365-day period in respect of a Demand Registration hereunder.


 






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3.1.2 Copies. The Company shall,
prior to filing a Registration Statement or prospectus, or any amendment or supplement thereto, furnish without charge to 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 holders of Registrable Securities included in such registration or legal counsel for
any such holders may request in order to facilitate the disposition of the Registrable Securities owned by such holders.


 


3.1.3 Amendments and Supplements.
The Company shall prepare and file with the Commission such amendments, including post-effective amendments, and supplements to
such Registration Statement and the prospectus used in connection therewith as may be necessary to keep such Registration Statement
effective and in compliance with the provisions of the Securities Act until all Registrable Securities and other securities covered
by such Registration Statement have been disposed of in accordance with the intended method(s) of distribution set forth in such
Registration Statement or such securities have been withdrawn.


 


3.1.4 Notification. After the filing
of a Registration Statement, the Company shall promptly, and in no event more than two (2) business days after such filing, notify
the holders of Registrable Securities included in such Registration Statement of such filing, and shall further notify such holders
promptly and confirm such advice in writing in all events within two (2) business days of the occurrence of any of the following:
(i) when such Registration Statement becomes effective; (ii) when any post-effective amendment to such Registration Statement becomes
effective; (iii) the issuance or threatened issuance by the Commission of any stop order (and the Company shall take all actions
required to prevent the entry of such stop order or to remove it if entered); and (iv) any request by the Commission for any amendment
or supplement to such Registration Statement or any prospectus relating thereto or for additional information or of the occurrence
of an event requiring the preparation of a supplement or amendment to such prospectus so that, as thereafter delivered to the purchasers
of the securities covered by such Registration Statement, such prospectus will not contain an untrue statement of a material fact
or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, and
promptly make available to the holders of Registrable Securities included in such Registration Statement any such supplement or
amendment; except that before filing with the Commission a Registration Statement or prospectus or any amendment or supplement
thereto, including documents incorporated by reference, the Company shall furnish to the holders of Registrable Securities included
in such Registration Statement and to the legal counsel for any such holders, copies of all such documents proposed to be filed
sufficiently in advance of filing to provide such holders and legal counsel with a reasonable opportunity to review such documents
and comment thereon, and the Company shall not file any Registration Statement or prospectus or amendment or supplement thereto,
including documents incorporated by reference, to which such holders or their legal counsel shall object.


 






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3.1.5 State Securities Laws Compliance.
The Company shall use its 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
but for this paragraph or subject itself to taxation in any such jurisdiction. 


 


3.1.6 Agreements for Disposition.
The Company shall enter into customary agreements (including, if applicable, an underwriting agreement in customary form) and take
such other actions as are reasonably required in order to expedite or facilitate the disposition of such Registrable Securities.
The representations, warranties and covenants of the Company in any underwriting agreement which are made to or for the benefit
of any Underwriters, to the extent applicable, shall also be made to and for the benefit of the holders of Registrable Securities
included in such registration statement. No holder of Registrable Securities included in such registration statement shall be required
to make any representations or warranties in the underwriting agreement except, if applicable, with respect to such holder’s
organization, good standing, authority, title to Registrable Securities, lack of conflict of such sale with such holder’s
material agreements and organizational documents, and with respect to written information relating to such holder that such holder
has furnished in writing expressly for inclusion in such Registration Statement.


 


3.1.7 Cooperation. The principal
executive officer of the Company, the principal financial officer of the Company, the principal accounting officer of the Company
and all other officers and members of the management of the Company shall cooperate fully in any offering of Registrable Securities
hereunder, which cooperation shall include, without limitation, the preparation of the Registration Statement with respect to such
offering and all other offering materials and related documents, and participation in meetings with Underwriters, attorneys, accountants
and potential investors.


 


3.1.8 Records. The Company shall
make available for inspection by the holders of Registrable Securities included in such Registration Statement, any Underwriter
participating in any disposition pursuant to such registration statement and any attorney, accountant or other professional retained
by any holder of Registrable Securities included in such Registration Statement or any Underwriter, all financial and other records,
pertinent corporate documents and properties of the Company, as shall be necessary to enable them to exercise their due diligence
responsibility, and cause the Company’s officers, directors and employees to supply all information requested by any of them
in connection with such Registration Statement.


 






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3.1.9 Opinions and Comfort Letters.
The Company shall furnish to each holder of Registrable Securities included in any Registration Statement a signed counterpart,
addressed to such holder, of (i) any opinion of counsel to the Company delivered to any Underwriter and (ii) any comfort letter
from the Company’s independent public accountants delivered to any Underwriter. In the event no legal opinion is delivered
to any Underwriter, the Company shall furnish to each holder of Registrable Securities included in such Registration Statement,
at any time that such holder elects to use a prospectus, an opinion of counsel to the Company to the effect that the Registration
Statement containing such prospectus has been declared effective and that no stop order is in effect.


 


3.1.10 Earnings Statement. The Company
shall comply with all applicable rules and regulations of the Commission and the Securities Act, and make available to its shareholders,
as soon as practicable, an earnings statement covering a period of twelve (12) months, which earnings statement shall satisfy the
provisions of Section 11(a) of the Securities Act and Rule 158 thereunder. 


 


3.1.11 Listing. The Company shall
use its best efforts to cause all Registrable Securities included in any registration to be listed on such exchanges or otherwise
designated for trading in the same manner as similar securities issued by the Company are then listed or designated or, if no such
similar securities are then listed or designated, in a manner satisfactory to the holders of a majority of the Registrable Securities
included in such registration.


 


3.1.12 Road Show. If the registration
involves the registration of Registrable Securities involving gross proceeds in excess of $25,000,000, the Company shall 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.


 


3.2 Obligation to Suspend Distribution.
Upon receipt of any notice from the Company of the happening of any event of the kind described in Section 3.1.4(iv), or, in the
case of a resale registration on Form S-3 pursuant to Section 2.3 hereof, upon any suspension by the Company, pursuant to a written
insider trading compliance program adopted by the Company’s Board of Directors, of the ability of all “insiders”
covered by such program to transact in the Company’s securities because of the existence of material non-public information,
each holder of Registrable Securities included in any registration shall immediately discontinue disposition of such Registrable
Securities pursuant to the Registration Statement covering such Registrable Securities until such holder receives the supplemented
or amended prospectus contemplated by Section 3.1.4(iv) or the restriction on the ability of “insiders” to transact
in the Company’s securities is removed, as applicable, and, if so directed by the Company, each such holder will deliver
to the Company all written copies, other than permanent file copies then in such holder’s possession, of the most recent
prospectus covering such Registrable Securities at the time of receipt of such notice.


 






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3.3 Registration Expenses. The Company
shall bear all costs and expenses incurred in connection with any Demand Registration pursuant to Section 2.1, any Piggy-Back Registration
pursuant to Section 2.2, and any registration on Form S-3 effected pursuant to Section 2.3, and all expenses incurred in performing
or complying with its other obligations under this Agreement, whether or not the Registration Statement becomes effective, including,
without limitation: (i) all registration and filing fees; (ii) fees and expenses of compliance with securities or “blue sky”
laws (including fees and disbursements of counsel in connection with blue sky qualifications of the Registrable Securities); (iii)
printing expenses; (iv) the Company’s internal expenses (including, without limitation, all salaries and expenses of its
officers and employees); (v) the fees and expenses incurred in connection with the listing of the Registrable Securities as required
by Section 3.1.11; (vi) Financial Industry Regulatory Authority fees; (vii) fees and disbursements of counsel for the Company and
fees and expenses for independent certified public accountants retained by the Company (including the expenses or costs associated
with the delivery of any opinions or comfort letters requested pursuant to Section 3.1.9); (viii) the fees and expenses of any
special experts retained by the Company in connection with such registration and (ix) the fees and expenses of one legal counsel
selected by the holders of a majority-in-interest of the Registrable Securities included in such registration. The Company shall
have no obligation to pay any underwriting discounts or selling commissions attributable to the Registrable Securities being sold
by the holders thereof, which underwriting discounts or selling commissions shall be borne by such holders. Additionally, in an
underwritten offering, all selling shareholders and the Company shall bear the expenses of the Underwriter pro rata in proportion
to the respective amount of shares each is selling in such offering. 


 


3.4 Information. The holders of Registrable
Securities shall provide such information as may reasonably be requested by the Company, or the managing Underwriter, if any, in
connection with the preparation of any Registration Statement, including amendments and supplements thereto, in order to effect
the registration of any Registrable Securities under the Securities Act pursuant to Section 2 and in connection with the Company’s
obligation to comply with federal and applicable state securities laws.


 


3.5 Limitations on Registration
Rights. Notwithstanding anything herein to the contrary, (i) Cantor and Chardan may not exercise its rights under Section 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) Cantor and Chardan may not exercise its rights under Section 2.1 more than one
time. 


 






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4. INDEMNIFICATION AND CONTRIBUTION.


 


4.1 Indemnification by the Company.
The Company agrees to indemnify and hold harmless each Investor and each other holder of Registrable Securities, and each of their
respective officers, employees, affiliates, directors, partners, members, attorneys and agents, and each person, if any, who controls
an Investor and each other holder of Registrable Securities (within the meaning of Section 15 of the Securities Act or Section
20 of the Exchange Act) (each, an “Investor Indemnified Party”), from and against any expenses, losses,
judgments, claims, damages or liabilities, whether joint or several, arising out of or based upon any untrue statement (or allegedly
untrue statement) of a material fact contained in any Registration Statement under which the sale of such Registrable Securities
was registered under the Securities Act, any preliminary prospectus, final prospectus or summary prospectus contained in the Registration
Statement, or any amendment or supplement to such Registration Statement, or arising out of or based upon any omission (or alleged
omission) to state a material fact required to be stated therein or necessary to make the statements therein not misleading, or
any violation by the Company of the Securities Act or any rule or regulation promulgated thereunder applicable to the Company and
relating to action or inaction required of the Company in connection with any such registration; and the Company shall promptly
reimburse the Investor Indemnified Party for any legal and any other expenses reasonably incurred by such Investor Indemnified
Party in connection with investigating and defending any such expense, loss, judgment, claim, damage, liability or action whether
or not any such person is a party to any such claim or action and including any and all legal and other expenses incurred in giving
testimony or furnishing documents in response to a subpoena or otherwise; provided, however, that the Company will not be liable
in any such case to the extent that any such expense, loss, claim, damage or liability arises out of or is based upon any untrue
statement or allegedly untrue statement or omission or alleged omission made in such Registration Statement, preliminary prospectus,
final prospectus, or summary prospectus, or any such amendment or supplement, in reliance upon and in conformity with information
furnished to the Company, in writing, by such selling holder expressly for use therein. The Company also shall indemnify any Underwriter
of the Registrable Securities, their officers, affiliates, directors, partners, members and agents and each person who controls
such Underwriter on substantially the same basis as that of the indemnification provided above in this Section 4.1. 


  


4.2 Indemnification by Holders of Registrable
Securities. Subject to the limitations set forth Section 4.4.3 hereof, each selling holder of Registrable Securities will,
in the event that any registration is being effected under the Securities Act pursuant to this Agreement of any Registrable Securities
held by such selling holder, indemnify and hold harmless the Company, each of its directors and officers and each Underwriter (if
any), and each other selling holder and each other person, if any, who controls another selling holder or such Underwriter within
the meaning of the Securities Act, against any losses, claims, judgments, damages or liabilities, whether joint or several, insofar
as such losses, claims, judgments, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue
statement or allegedly untrue statement of a material fact contained in any Registration Statement under which the sale of such
Registrable Securities was registered under the Securities Act, any preliminary prospectus, final prospectus or summary prospectus
contained in the Registration Statement, or any amendment or supplement to the Registration Statement, or arise out of or are based
upon any omission or the alleged omission to state a material fact required to be stated therein or necessary to make the statement
therein not misleading, if the statement or omission was made in reliance upon and in conformity with information furnished in
writing to the Company by such selling holder expressly for use therein, and shall reimburse the Company, its directors and officers,
and each other selling holder or controlling person for any legal or other expenses reasonably incurred by any of them in connection
with investigation or defending any such loss, claim, damage, liability or action. Each selling holder’s indemnification
obligations hereunder shall be several and not joint and shall be limited to the amount of any net proceeds actually received by
such selling holder.


 






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4.3 Conduct of Indemnification Proceedings.
Promptly after receipt by any person of any notice of any loss, claim, damage or liability or any action in respect of which indemnity
may be sought pursuant to Section 4.1 or 4.2, such person (the “Indemnified Party”) shall, if a claim
in respect thereof is to be made against any other person for indemnification hereunder, notify such other person (the “Indemnifying
Party”) in writing of the loss, claim, judgment, damage, liability or action; provided, however, that the failure
by the Indemnified Party to notify the Indemnifying Party shall not relieve the Indemnifying Party from any liability which the
Indemnifying Party may have to such Indemnified Party hereunder, except and solely to the extent the Indemnifying Party is actually
prejudiced by such failure. If the Indemnified Party is seeking indemnification with respect to any claim or action brought against
the Indemnified Party, then the Indemnifying Party shall be entitled to participate in such claim or action, and, to the extent
that it wishes, jointly with all other Indemnifying Parties, to assume control of the defense thereof with counsel satisfactory
to the Indemnified Party. After notice from the Indemnifying Party to the Indemnified Party of its election to assume control of
the defense of such claim or action, the Indemnifying Party shall not be liable to the Indemnified Party for any legal or other
expenses subsequently incurred by the Indemnified Party in connection with the defense thereof other than reasonable costs of investigation;
provided, however, that in any action in which both the Indemnified Party and the Indemnifying Party are named as defendants, the
Indemnified Party shall have the right to employ separate counsel (but no more than one such separate counsel) to represent the
Indemnified Party and its controlling persons who may be subject to liability arising out of any claim in respect of which indemnity
may be sought by the Indemnified Party against the Indemnifying Party, with the fees and expenses of such counsel to be paid by
such Indemnifying Party if, based upon the written advice of counsel of such Indemnified Party, representation of both parties
by the same counsel would be inappropriate due to actual or potential differing interests between them. No Indemnifying Party shall,
without the prior written consent of the Indemnified Party, consent to entry of judgment or effect any settlement of any claim
or pending or threatened proceeding in respect of which the Indemnified Party is or could have been a party and indemnity could
have been sought hereunder by such Indemnified Party, unless such judgment or settlement includes an unconditional release of such
Indemnified Party from all liability arising out of such claim or proceeding. 


 


4.4 Contribution.


 


4.4.1 If the indemnification provided for
in the foregoing Sections 4.1, 4.2 and 4.3 is unavailable to any Indemnified Party in respect of any loss, claim, damage, liability
or action referred to herein, then each such Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall contribute
to the amount paid or payable by such Indemnified Party as a result of such loss, claim, damage, liability or action in such proportion
as is appropriate to reflect the relative fault of the Indemnified Parties and the Indemnifying Parties in connection with the
actions or omissions which resulted in such loss, claim, damage, liability or action, as well as any other relevant equitable considerations.
The relative fault of any Indemnified Party and any Indemnifying Party shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact
relates to information supplied by such Indemnified Party or such Indemnifying Party and the parties’ relative intent, knowledge,
access to information and opportunity to correct or prevent such statement or omission.


 


4.4.2 The parties hereto agree that it
would not be just and equitable if contribution pursuant to this Section 4.4 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 the immediately preceding Section
4.4.1.


 






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4.4.3 The amount paid or payable by an
Indemnified Party as a result of any loss, claim, damage, liability or action referred to in the immediately preceding paragraph
shall be deemed to include, subject to the limitations set forth above, any legal or other expenses incurred by such Indemnified
Party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 4.4,
no holder of Registrable Securities shall be required to contribute any amount in excess of the dollar amount of the net proceeds
(after payment of any underwriting fees, discounts, commissions or taxes) actually received by such holder from the sale of Registrable
Securities which gave rise to such contribution obligation. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) with respect to any action shall be entitled to contribution in such action from any person
who was not guilty of such fraudulent misrepresentation.


 


5. UNDERWRITING AND DISTRIBUTION.


 


5.1 Rule 144. The Company covenants
that it shall file any reports required to be filed by it under the Securities Act and the Exchange Act and shall take such further
action as the holders of Registrable Securities may reasonably request, all to the extent required from time to time to enable
such holders to sell Registrable Securities without registration under the Securities Act within the limitation of the exemptions
provided by Rule 144 under the Securities Act, as such Rules may be amended from time to time, or any similar rule or regulation
hereafter adopted by the Commission. 


 


6. MISCELLANEOUS.


 


6.1 Other Registration Rights. The
Company represents and warrants that no person, other than the holders of the Registrable Securities, has any right to require
the Company to register any shares of the Company’s capital stock for sale or to include shares of the Company’s capital
stock in any registration filed by the Company for the sale of shares of capital stock for its own account or for the account of
any other person.


 


6.2 Assignment; No Third Party Beneficiaries.
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. This Agreement and the rights, duties and obligations of the holders of Registrable Securities hereunder may
be freely assigned or delegated by such holder of Registrable Securities in conjunction with and to the extent of any transfer
of Registrable Securities by any such holder. This Agreement and the provisions hereof shall be binding upon and shall inure to
the benefit of each of the parties, to the permitted assigns of the Investors or holder of Registrable Securities or of any assignee
of the Investors or holder of Registrable Securities. This Agreement is not intended to confer any rights or benefits on any persons
that are not party hereto other than as expressly set forth in Article 4 and this Section 6.2.


 






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6.3 Notices. All notices, demands,
requests, consents, approvals or other communications (collectively, “Notices”) required or permitted
to be given hereunder or which are given with respect to this Agreement shall be in writing and shall be personally served, delivered
by reputable air courier service with charges prepaid, or transmitted by hand delivery, telegram, telex or facsimile, addressed
as set forth below, or to such other address as such party shall have specified most recently by written notice. Notice shall be
deemed given on the date of service or transmission if personally served or transmitted by telegram, telex or facsimile; provided,
that if such service or transmission is not on a business day or is after normal business hours, then such notice shall be deemed
given on the next business day. Notice otherwise sent as provided herein shall be deemed given on the next business day following
timely delivery of such notice to a reputable air courier service with an order for next-day delivery.


 


To the Company:


 


Allegro Merger Corp.

777 Third Avenue, 37th Floor

New York, New York 10017

Attn: Chief Executive Officer


 


with a copy to:


 


Graubard Miller

The Chrysler Building

405 Lexington Avenue

New York NY 10174

Attn: David Alan Miller, Esq.


 


To an Investor, to the address set forth below such
Investor’s name on Exhibit A hereto. 


 


6.4 Severability. This Agreement
shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect the validity
or enforceability of this Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable
term or provision, the parties hereto intend that there shall be added as a part of this Agreement a provision as similar in terms
to such invalid or unenforceable provision as may be possible that is valid and enforceable.


 


6.5 Counterparts. This Agreement
may be executed in multiple counterparts, each of which shall be deemed an original, and all of which taken together shall constitute
one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or email/pdf transmission shall constitute
valid and sufficient delivery thereof.


 


6.6 Entire Agreement. This Agreement
(including all agreements entered into pursuant hereto and all certificates and instruments delivered pursuant hereto and thereto)
constitute the entire agreement of the parties with respect to the subject matter hereof and supersede all prior and contemporaneous
agreements, representations, understandings, negotiations and discussions between the parties, whether oral or written.


 


6.7 Modifications and Amendments.
No amendment, modification or termination of this Agreement shall be binding upon any party unless executed in writing by such
party.


 






    	 	15	 



     


    

 


6.8 Titles and Headings. Titles and
headings of sections of this Agreement are for convenience only and shall not affect the construction of any provision of this
Agreement.


 


6.9 Waivers and Extensions. Any party
to this Agreement may waive any right, breach or default which such party has the right to waive, provided that such waiver will
not be effective against the waiving party unless it is in writing, is signed by such party, and specifically refers to this Agreement.
Waivers may be made in advance or after the right waived has arisen or the breach or default waived has occurred. Any waiver may
be conditional. No waiver of any breach of any agreement or provision herein contained shall be deemed a waiver of any preceding
or succeeding breach thereof nor of any other agreement or provision herein contained. No waiver or extension of time for performance
of any obligations or acts shall be deemed a waiver or extension of the time for performance of any other obligations or acts.


 


6.10 Remedies Cumulative. In the
event that the Company fails to observe or perform any covenant or agreement to be observed or performed under this Agreement,
the Investor or any other holder of Registrable Securities may proceed to protect and enforce its rights by suit in equity or action
at law, whether for specific performance of any term contained in this Agreement or for an injunction against the breach of any
such term or in aid of the exercise of any power granted in this Agreement or to enforce any other legal or equitable right, or
to take any one or more of such actions, without being required to post a bond. None of the rights, powers or remedies conferred
under this Agreement shall be mutually exclusive, and each such right, power or remedy shall be cumulative and in addition to any
other right, power or remedy, whether conferred by this Agreement or now or hereafter available at law, in equity, by statute or
otherwise. 


 


6.11 Governing Law. This Agreement
shall be governed by, interpreted under, and construed in accordance with the internal laws of the State of New York applicable
to agreements made and to be performed within the State of New York, without giving effect to any choice-of-law provisions thereof
that would compel the application of the substantive laws of any other jurisdiction. The Company irrevocably submits to the nonexclusive
jurisdiction of any New York State or United States Federal court sitting in The City of New York, Borough of Manhattan, over any
suit, action or proceeding arising out of or relating to this Agreement. The Company irrevocably waives, to the fullest extent
permitted by law, any objection that they may now or hereafter have to the laying of venue of any such suit, action or proceeding
brought in such a court and any claim that any such suit, action or proceeding brought in such a court has been brought in an inconvenient
forum.


 


6.12 Waiver of Trial by Jury. Each
party hereby irrevocably and unconditionally waives the right to a trial by jury in any action, suit, counterclaim or other proceeding
(whether based on contract, tort or otherwise) arising out of, connected with or relating to this Agreement, the transactions contemplated
hereby, or the actions of the Investor in the negotiation, administration, performance or enforcement hereof.


 


[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


 




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IN WITNESS WHEREOF, the parties have caused
this Registration Rights Agreement to be executed and delivered by their duly authorized representatives as of the date first written
above.


 


	 	COMPANY:
	 	 
	 	ALLEGRO MERGER CORP.
	 	 	 
	 	By:	/s/ David Sgro
	 	 	Name: David Sgro
	 	 	Title: Chief Operating Officer
	 	 	 
	 	INVESTORS:


 


	 	ERIC ROSENFELD 2017 TRUST NO. 1
	 	 
	 	By: 	/s/ David Sgro
	 	 	Name: David Sgro
	 	 	Title: Trustee


 


	 	ERIC ROSENFELD 2017 TRUST NO. 2
	 	 
	 	By:	/s/ David Sgro
	 	 	Name: David Sgro
	 	 	Title: Trustee
	 	 	 
	 	GEDULD & CO., LLC
	 	 
	 	By:	/s/ Emanuel E. Geduld
	 	 	Name: Emanuel E. Geduld
	 	 	Title: Managing Member
	 	 	 
	 	TRIPLE J MILLS, II, LLC
	 	 
	 	By:	/s/ Adam J. Semler
	 	 	Name: Adam J. Semler
	 	 	Title: Manager



 






    	 	17	 



     


    




	 	 	 
	 	/s/ Robert Deluce
	 	Robert Deluce
	 	 
	 	/s/ Robert Michael Deluce
	 	Robert Michael Deluce
	 	 
	 	/s/ Adam Jaffe
	 	Adam Jaffe
	 	 
	 	/s/ Stephen Lack
	 	Stephen Lack
	 	 
	 	/s/ Gregory Monahan
	 	Gregory Monahan
	 	 
	 	/s/ Michael Price
	 	Michael Price
	 	 
	 	/s/ Eric Rosen
	 	Eric Rosen
	 	 
	 	/s/ Eric
    Rosenfeld
	 	Eric Rosenfeld
	 	 
	 	/s/ Daniel P.
    Ryan
	 	Daniel P. Ryan
	 	 
	 	/s/ Pamela S.
    Ryan
	 	Pamela S. Ryan
	 	 
	 	/s/ John P.
    Schauerman
	 	John P. Schauerman
	 	 
	 	/s/ Leonard B.
    Schlemm
	 	Leonard B. Schlemm
	 	 
	 	/s/ David
    Sgro
	 	David Sgro





 






    	 	18	 



     


    

 


	 	CANTOR FITZGERALD & CO.
	 	 	 
	 	By: 	/s/ Mark Kaplan
	 	 	Name: Mark Kaplan
	 	 	Title: Global Chief Operating Officer
	 	 	 
	 	CHARDAN CAPITAL MARKETS, LLC
	 	 	 
	 	By: 	/s/ George Kaufman
	 	 	Name: George Kaufman
	 	 	Title: Managing Director


 




    	 	19	 



     


    

 


EXHIBIT A


 


	
        Name and Address of 

        Investor 

	
        Robert Deluce

        [address]

         

	
        Robert Michael Deluce

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        Geduld & Co., LLC

        279 Central Park West,
        Apt 12A

        New York, NY 10024

        Attn: Emanuel E. Geduld

         

	
        Adam Jaffe

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        Stephen Lack

        55 W 10th, Suite 1130

        Houston, TX 77007

         

	
        Gregory Monahan

        43 Christie Hill Road

        Darien, CT 06820

         

	
        Michael F. Price

        c/o MFP Investors LLC

        909 Third Ave, 33rd Floor

        New York, NY 10022

         

	
        Eric Rosen

        1088 Park Ave #12C

        New York, NY 10128

         

	
        Eric Rosenfeld

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         




 






    	 	20	 



     


    

 


	
        Name and Address of 

        Investor 

	
        Dan & Pamela Ryan

        4640 Linwood Circle

        Greenwood, MN 55331

         

	
        John P. Schauerman

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        Leonard B. Schlemm

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        Triple J Holdings II, LLC

        Adam Semler

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        David Sgro

        c/o Allegro Merger Corp.

        777 Third Avenue, 37th Floor

        New York, NY 10017

        Attn: David Sgro

         

	
        Cantor Fitzgerald & Co.

        499 Park Avenue

        New York, New York 10022

         

	
        Chardan Capital Markets, LLC

        17 State Street, Suite 1600

        New York, NY 10004 



  








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