Exhibit
10.4


 


FORM
OF REGISTRATION RIGHTS AGREEMENT


 


THIS
REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [●], 2021, is made and entered into
by and among B. Riley Principal 250 Merger Corp., a Delaware corporation (the “Company”), B. Riley Principal
250 Sponsor Co., LLC, a Delaware limited liability company (the “Sponsor”) and each of the undersigned
individuals (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 has 4,312,500 shares of the Company’s Class B common stock, par value $0.0001 per share (the “Founder
Shares”), issued and outstanding, up to 562,500 of which will be forfeited to the Company for no consideration depending
on the extent to which the underwriters of the Company’s initial public offering exercise their over-allotment option;


 


WHEREAS,
the Founder Shares are convertible into shares of the Company’s Class A common stock, par value $0.0001 per share (the “Common
Stock”), on the terms and conditions provided in the Company’s second amended and restated certificate of
incorporation;


 


WHEREAS,
on [●], 2021, the Company and the Sponsor entered into that certain Private Placement Units Purchase Agreement (the “Private
Placement Units Purchase Agreement”), pursuant to which the Sponsor agreed to purchase an aggregate of 555,000 private
placement units (or up to 600,000 units to the extent that the over-allotment option in connection with the Company’s initial
public offering is exercised) (the “Private Placement Units”) in a private placement transaction occurring
simultaneously with the closing of the Company’s initial public offering;


 


WHEREAS,
in order to finance the Company’s transaction costs in connection with its search for and consummation of an initial Business
Combination, the Sponsor or an affiliate of the Sponsor or certain of the Company’s officers and directors may loan to the
Company funds as the Company may require, of which up to $1,500,000 of such loans may be convertible into private placement-equivalent
units (“Working Capital Units”) at a price of $10.00 per unit at the option of the lender; 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
Shares” shall have the meaning given in the Recitals hereto and shall be deemed to include the shares of Common
Stock issuable upon conversion thereof.


 


“Founder
Shares Lock-up Period” shall mean, with respect to the Founder Shares, the period ending on the earlier of (A) one
year after the completion of the Company’s initial Business Combination or (B) subsequent to the Business Combination,
(x) if the last sale price of the Common Stock 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 on which the Company completes a liquidation,
merger, capital stock exchange, reorganization 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.


 


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


 


“Insider
Letter” shall mean that certain letter agreement, dated as of [●], 2021, by and among the Company, the Sponsor
and each of the Company’s officers, directors and director nominees.


 


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


 






    2


     


    

 


“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 any person or entity to whom a Holder of Registrable Securities is permitted to transfer
such Registrable Securities prior to the expiration of the Founder Shares Lock-up Period, Private Placement Lock-up Period or
any other lock-up period, as the case may be, under the Insider Letter, the Private Placement Units Purchase Agreement, this Agreement
and any other applicable agreement between such Holder and the Company, and to any transferee thereafter.


 


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


 


“Private
Placement Lock-up Period” shall mean, with respect to Private Placement Units that are held by the initial purchasers
of such Private Placement Units or their Permitted Transferees, the private placement shares, private placement warrants and shares
of Common Stock issuable upon the exercise of the private placement warrants, and that are held by the initial purchasers of the
Private Placement Units or their Permitted Transferees, the period ending 30 days after the completion of the Company’s
initial Business Combination.


 


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


 


“Private
Placement Units Purchase Agreement” shall have the meaning given in the Recitals hereto.


 


“Pro
Rata” shall have the meaning given in subsection 2.1.4.


 


“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.


 


“Registrable
Security” shall mean (a) the Founder Shares and the shares of Common Stock issued or issuable upon the conversion
of the Founder Shares, (b) the Private Placement Units (including any shares of Common Stock and private placement warrants
included in such Private Placement Units and any shares of Common Stock issued or issuable upon the exercise of the private placement
warrants underlying the Private Placement Units), (c)  any outstanding shares of Common Stock or any other equity security
(including the shares of 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, (d) 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 in an amount
up to $1,500,000 made to the Company by a Holder (including the Working Capital Units, any shares of Common Stock underlying the
Working Capital Units, the private placement warrants underlying the Working Capital Units and shares of Common Stock issued or
issuable upon the exercise of the private placement warrants underlying the Working Capital Units) and (e) any other equity
security of the Company issued or issuable with respect to any such share of 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 to Rule 144 promulgated under the Securities Act (or any successor rule promulgated
thereafter by the Commission) (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.


 






    3


     


    

 


“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, Inc.) 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


 


(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.


 


“Working
Capital Units” 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.


 






    4


     


    

 


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 fifteen percent
(15%) of the then-outstanding number of Registrable Securities (the “Demanding Holders”) may make a
written demand for Registration 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 to such 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.


 


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.


 






    5


     


    

 


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 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 Registrable Securities of Holders (Pro
Rata, based on the respective number of Registrable Securities that each Holder has so requested) exercising their rights to register
their Registrable Securities pursuant to subsection 2.2.1 hereof, 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 that the Company desires to sell, which can be sold without exceeding the Maximum
Number of Securities; and (iv) fourth, to the extent that the Maximum Number of Securities has not been reached under the
foregoing clauses (i), (ii) and (iii), 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.


 






    6


     


    

 


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 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 to 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 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 Registration
and the aggregate number of Registrable Securities that the Holders have requested to be included in such Registration, 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 Common Stock or other equity securities that the Company desires
to sell, 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.


 






    7


     


    

 


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 $10,000,000.


 


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.


 






    8


     


    

 


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 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 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;


 






    9


     


    

 


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 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 and its counsel, including, without limitation,
providing copies promptly upon receipt of any comment letters received with respect to any such Registration Statement or Prospectus;


 


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 participating 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; and
provided further, the Company may not include the name of any Holder or Underwriter or any information regarding any Holder
or Underwriter in any Registration Statement or Prospectus, any amendment or supplement to such Registration Statement or Prospectus,
any document that is to be incorporated by reference into such Registration Statement or Prospectus, or any response to any comment
letter, without the prior written consent of such Holder or Underwriter and providing each such Holder or Underwriter a reasonable
amount of time to review and comment on such applicable document, which comments the Company shall include unless contrary to
applicable law;


 


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;


 






    10


     


    

 


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
(or any successor rule promulgated thereafter by the Commission);


 


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.


 


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
he, she or 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 he, she or 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.


 






    11


     


    

 


3.5
Reporting Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times while it shall
be a reporting company 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 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 (or any successor rule promulgated
thereafter by the Commission), 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) the Sponsor may not exercise
its rights under Section 2.1 and 2.2 hereunder after five (5) and seven (7) years, respectively, after the effective date of the
registration statement relating to the Company’s initial public offering and (ii) the Sponsor 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.


 






    12


     


    

 


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). 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 (plus local counsel) for all parties indemnified by such indemnifying party with respect
to such claim, 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.


 






    13


     


    

 


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,
electronic mail, telecopy, telegram 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,
electronic mail, telecopy, telegram 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, if to the Company, to: 299 Park Avenue, 21st Floor, New York, New York 10171, and, if
to any Holder, at such Holder’s address or contact information as set forth 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 Shares 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.


 


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.


 






    14


     


    

 


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 (I) THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK
AS APPLIED TO AGREEMENTS AMONG NEW YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK, WITHOUT REGARD TO
THE CONFLICT OF LAW PROVISIONS OF SUCH JURISDICTION AND (II) THE VENUE FOR ANY ACTION TAKEN WITH RESPECT TO THIS AGREEMENT
SHALL BE ANY STATE OR FEDERAL COURT IN NEW YORK COUNTY IN THE STATE OF NEW YORK.


 


5.5
Amendments and Modifications. Upon the written consent of the Company and the Holders of at least a majority in interest
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 his, her or 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(a)(3) of the Securities Act and Rule 174 thereunder (or
any successor rule promulgated thereafter by the Commission)) or (B) the Holders of all Registrable Securities are permitted
to sell the Registrable Securities without registration pursuant to Rule 144 (or any similar provision) under the Securities Act
with no volume or other restrictions or limitations. The provisions of Section 3.5 and Article IV shall survive
any termination.


 


[Signature
Page Follows]


 






    15


     


    

 


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


 


	 	COMPANY:
	 	 
	 	B.
    Riley Principal 250 Merger Corp., a Delaware corporation
	 	 	 
	 	By:	 
	 	 	Name:	Daniel
    Shribman
	 	 	Title:	Chief
    Financial Officer


 


	 	HOLDERS:
	 	 
	 	B.
    Riley Principal 250 Sponsor Co., LLC, a Delaware limited liability company
	 	 	 
	 	By:	 
	 	 	 
	 	By:	 
	 	 	Name:	 
	 	 	Title:
	 	 	 
	 	By:	 
	 	 	Name:  
	 	 	 
	 	By:	 
	 	 	Name:  
	 	 	 
	 	By:	 
	 	 	Name:  
	 	 	 
	 	By:	 
	 	 	Name:  


 


[Signature
Page to Registration Rights Agreement]


 


 


16