Document:

EX-4.1

 Exhibit 4.1 

AMENDED AND RESTATED 

REGISTRATION RIGHTS AGREEMENT 

THIS AMENDED AND RESTATED REGISTRATION RIGHTS
AGREEMENT (this “Agreement”) is entered into as of the      day
of                    , 2018, by and among FORUM MERGER CORPORATION, a Delaware
corporation (the “Company”), and the parties set forth on Exhibit A hereto (collectively the “Investors”). 

WHEREAS, the Company, C1 Investment Corp., a Delaware corporation (“C1”), FMC
Merger Subsidiary Corp., a Delaware corporation and a wholly-owned subsidiary of the Company (“Merger Sub”), and the other parties named therein have entered into that certain Merger Agreement, dated as of November 30,
2017 (as amended from time to time in accordance with the terms thereof, the “Merger Agreement”), pursuant to which Merger Sub will merge with and into C1, with C1 continuing as the surviving entity (the
“Merger”); 
 WHEREAS, Forum Investors I, LLC (the
“Sponsor”) is a party to a Registration Rights Agreement dated as of April 6, 2017, by and between the Sponsor and the Company (the “Prior Agreement”), pursuant to which the Company provided the
Sponsor with certain rights relating to the registration of shares of Common Stock, Founders’ Units (as defined in the Prior Agreement) and Working Capital Units (as defined in the Prior Agreement) held by them; 

WHEREAS, as a condition to the willingness of C1 to enter into the Merger Agreement and to consummate the
Merger, the Company has agreed to amend and restate the Prior Agreement in order to provide rights relating to the registration of shares of Common Stock issued or issuable to the holders of C1’s Class A Common Stock pursuant to the
Merger; and 
 WHEREAS, the parties to the Prior Agreement desire to amend and restate the
Prior Agreement and accept the rights and covenants hereof in lieu of their rights and covenants under the Prior Agreement. 

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: 

A. The Prior Agreement is hereby amended in its entirety and restated herein. Such amendment and restatement is effective upon
the execution of this Agreement by the Company and the Sponsor, which holds sixty-six and two-thirds percent of all of the outstanding Registrable Securities (as defined
under the Prior Agreement) under the Prior Agreement as of the date of this Agreement. Upon such execution, all provisions of, rights granted and covenants made in the Prior Agreement are hereby waived, released and superseded in their entirety and
shall have no further force or effect, including, without limitation, all rights of first refusal and any notice period associated therewith otherwise applicable to the transactions contemplated by the Merger Agreement (provided, that for the
avoidance of doubt, the foregoing will not affect the rights of the Sponsor under the Sponsor Earnout Letter and Escrow Agreement Amendment (as defined in the Merger Agreement)). 

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. 

“Commission” means the U.S. Securities and Exchange Commission, or any other federal agency then administering the
Securities Act or the Exchange Act. 
 “Common Stock” means the Class A Common Stock, par value $0.0001 per
share, of the Company, including without limitation any shares of Class F Common Stock, par value $0.0001 per share, of the Company that converted into shares of Class A Common Stock, par value $0.0001 per share of the Company upon the
consummation of the Merger. 
 “Company” is defined in the preamble to this Agreement. 

  
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 “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. 

“Investor Indemnified Party” is defined in Section 4.1. 

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

“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 Warrants” means the warrants that were included as part of the units issued in a private placement to the
Sponsor at the time of the consummation of the Company’s initial public offering and any warrants underlying any units held by the Sponsor, or officers or directors of the Company, or their affiliates, which may have been issued in payment of
working capital loans made to the Company. 
 “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) shares of
Common Stock issued or issuable to Investors in exchange for shares of Class A Common Stock of C1 upon the closing of the Merger (including without limitation any shares of Common Stock to be issued after the closing of the Merger pursuant to
the Merger Agreement) and (ii) shares of Common Stock (including shares of Common Stock issuable upon exercise of Private Warrants) held by the Sponsor immediately after the closing of the Merger (including without limitation, giving effect to
the conversion of (x) any shares of Class F Common Stock of the Company in shares of Class A Common Stock of the Company upon the closing of the Company’s initial business combination, and (y) any rights that were included
as part of the units issued in a private placement to the Sponsor at the time of the consummation of the Company’s initial public offering into shares of Common Stock). 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 shares of Common Stock (including shares of Common Stock issuable upon exercise of Private Warrants). 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) such securities are freely
saleable under Rule 144 without volume limitations. 
 “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 Common Stock (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). 

  
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 “Rule 144” means Rule 144 promulgated under the Securities Act. 

“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. 
 “Sponsor” is defined in the preamble to
this Agreement. 
 “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. 
 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 of this Agreement, the holders of a majority-in-interest of the Registrable Securities, as the case may be, held by the Investors or their affiliates, or the permitted transferees of the Investors, may make a
written demand for registration under the Securities Act of all or part of the 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 within 10 days of the Company’s receipt of the Demand Registration 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 ten (10) 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. Notwithstanding the foregoing, the Company shall not be obligated to effect any such registration pursuant to
this Section 2.1 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 $1,000,000. 
 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 affirmatively elect to continue the offering and notify the Company in writing, but
in no event later than five (5) days of such election; 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 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. 

  
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 2.1.4 Reduction of Offering. If the managing Underwriter or Underwriters for a
Demand Registration that is to be an underwritten offering, in good faith, 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) 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 Demanding Holder has requested be included in such registration,
regardless of the number of shares held by each such Demanding Holder (such proportion is referred to herein as “Pro Rata”)) that can be sold without exceeding the Maximum Number of Shares; (ii) to the extent that the
Maximum Number of Shares has not been reached under the foregoing clause (i), the Registrable Securities of holders exercising their rights to register their Registrable Securities pursuant to Section 2.2; (iii) 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 that the Company desires to sell that can be sold without exceeding the Maximum Number of Shares; (iv) to the
extent that the Maximum Number of Shares has not been reached under the foregoing clauses (i), (ii) and (iii), the shares of Common Stock or other securities registrable pursuant to the terms of the Unit Purchase Option issued to EarlyBirdCapital,
Inc. or its designees in connection with the Company’s initial public offering (the “Unit Purchase Option” and such registrable securities, the “Option Securities”) as to which
“piggy-back” registration has been requested by the holders thereof, Pro Rata, that can be sold without exceeding the Maximum Number of Shares and (v) to the extent that the Maximum Number of Shares have not been reached
under the foregoing clauses (i), (ii), (iii) and (iv), 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. 
 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 this Section 2.1. 
 2.2 Piggy-Back Registration. 

2.2.1 Piggy-Back Rights. If at any time on or after the date the date hereof 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 stockholders of the Company for
their account (or by the Company and by stockholders 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 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 (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, in good faith, cause such Registrable Securities to be included in such 

  
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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. 
 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 separate written contractual arrangements with persons or entities 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
stockholders 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) 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) 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 and Option 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) 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; and 
 (b) If the registration is a “demand”
registration undertaken at the demand of holders of Option Securities, (A) 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) 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) 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) 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. 

(c) If the registration is a “demand” registration undertaken at the demand of persons or entities other than the holders of
Registrable Securities or Option Securities, (A) 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) 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) 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 and Option Securities, Pro Rata, as to which registration has been
requested pursuant to the terms hereof and the Unit Purchase Option, as applicable, that can be sold without exceeding the Maximum Number of Shares; and (D) 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 

  
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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 the 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. 

2.2.4 Unlimited Piggy-Back 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 a majority-in-interest of the 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”). 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 each
holder of Registrable Securities who thereafter wishes to include all or a portion of such holder’s Registrable Securities in such registration shall so notify the Company, in writing, within ten (10) days after the receipt by the holder
of the notice from the Company, and, 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, 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; provided, however, that the Company shall not be obligated to effect any such registration pursuant to this Section 2.3 if: (i) Form S-3 is not available for such offering; or (ii) 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 2.3.1 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, as expeditiously as possible and in any event within
sixty (60) days 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 and remain 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 Chairman of the Board of
Directors or Chief Executive Officer 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 stockholders for such Registration Statement to be
effected at such time; provided further, however, that the Company shall not have the right to 

  
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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. 

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 (which period shall not exceed the
sum of one hundred eighty (180) days plus any period during which any such disposition is interfered with by any stop order or injunction of the Commission or any governmental agency or court) 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 reasonably object. 

3.1.5 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 or
securities exchanges 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 

  
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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 as reasonably requested by the Underwriters and, 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. 

3.1.9 Earnings Statement. The Company shall comply with all applicable rules and regulations of the Commission and the Securities
Act, and make available to its stockholders, as soon as reasonably practicable, an earnings statement covering a period of twelve (12) months, beginning within three (3) months after the effective date of the registration statement, which
earnings statement shall satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder. 
 3.1.10
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. 

3.1.11 Transfer Agent. The Company shall provide a transfer agent or warrant agent, as applicable, and registrar for all such
Registrable Securities no later than the effective date of the registration statement. 
 3.1.12 Misstatements. The Company
shall 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 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 therein in the light of the
circumstances under which they were made not misleading (a “Misstatement”), and then to correct such Misstatement. 

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 

  
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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 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. 

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 and fees of any securities exchange on which the Common
Stock is then listed; (ii) fees and expenses of compliance with securities or “blue sky” laws (including fees and disbursements of counsel for the Underwriters in connection with blue sky qualifications of the
Registrable Securities); (iii) printing, messenger, telephone and delivery 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 stockholders 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 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. 
 3.6 Suspension of Sales; Adverse Disclosure. Upon receipt of written notice from
the Company that a registration statement or prospectus contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received copies of a supplemented or amended prospectus correcting
the Misstatement (it being understood that the Company hereby covenants to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until it is advised in writing by the Company that the use of the
prospectus may be resumed. If the filing, initial effectiveness or continued use of a registration statement in respect of any registration at any time would require the Company to make an Adverse Disclosure (as defined below) or would require the
inclusion in such registration statement of financial 

  
 9 

 
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 3.6. “Adverse Disclosure” shall mean any public
disclosure of material non-public information, which disclosure, in the good faith judgment of the principal 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. 

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

  
 10 

 4.2 Indemnification by Holders of Registrable Securities. 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. Each selling holder of Registrable Securities shall indemnify any Underwriter of
the Registrable Securities, their officers, affiliates, directors, partners, members and agents and each person who controls such Underwriter to the same extent as provided in the foregoing with respect to indemnification of the Company. 

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 opinion 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 

  
 11 

 
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. 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) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. 

4.5 Survival. 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. 

5. RESERVED. 

6. MISCELLANEOUS. 

6.1 Other Registration Rights. The Company represents and warrants that no person, other than a holder of the Registrable
Securities and EarlyBirdCapital, Inc. pursuant to the Unit Purchase Option and the Underwriting Agreement, dated as of April 6, 2017, by and between EarlyBirdCapital, Inc. and the Company, 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.
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. 
 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 a holder of Registrable Securities to a transferee or assignee of Registrable Securities (for so long as such shares remain Registrable Securities) that (a) is a subsidiary, parent, general partner, limited partner,
retired partner, member or retired member, or stockholder of a Holder that is a corporation, partnership or limited liability company, (b) is a Holder’s family member or trust for the benefit of an individual Holder, or (c) acquires
at least 400,000 shares of Registrable Securities (as adjusted for stock splits and combinations) (including shares of Common Stock issuable upon exercise of Private Warrants); or (d) is an entity affiliated by common control (or other related
entity) with such Holder; provided, however, (i) the transferor shall, within ten (10) days after such transfer, furnish to the Company written notice of the name and address of such transferee or assignee and the securities with
respect to which such registration rights are being assigned and (ii) such transferee shall agree to be subject to all restrictions set forth in this Agreement in conjunction with and to the extent of any transfer of

  
 12 

 
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 and the permitted assigns of the
Investor or holder of Registrable Securities or of any assignee of the Investor 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. 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 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). 
 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 (with respect to the Company) or on Exhibit A hereto (with respect to the Investors), 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: 

ConvergeOne, Inc. 
 3344 Highway
149 
 Eagan, MN 55121 
 Attn:
Board of Directors 
 with a copy to: 

Cooley LLP 3175 Hanover Street 

Palo Alto, CA 94304-1130 
 Attn:
Mehdi Khodadad, Esq. 
           John T. McKenna, Esq. 

Facsimile No.: (650) 849-7400 

Telephone No.: (650) 843-5000 

Email: mkhodadad@cooley.com 

            jmckenna@cooley.com 

and 
 Ellenoff Grossman &
Schole LLP 
 1345 Avenue of the Americas, 11th Floor 

New York, New York 10105 
 Attn:
Douglas Ellenoff, Esq. 
          Tamar Donikyan, Esq. 

Facsimile No.: (212) 370-7889 

Telephone No.: (212) 370-1300 

Email: ellenoff@egsllp.com 

            tdonikyan@egsllp.com 

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. 

  
 13 

 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. 
 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. Upon the written consent of the Company and the holders of at least a majority 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 of Registrable Securities, solely in its capacity as a holder of the shares of Common Stock (including shares of Common Stock
issuable upon exercise of Private Warrants) of the Company, in a manner that is materially different from the other holders of Registrable Securities (in such capacity) shall require the consent of the holder so affected. No course of dealing
between any holders of Registrable Securities or the Company and any other party hereto or any failure or delay on the part of a holder of Registrable Securities 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 of Registrable Securities 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. 
 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. 
 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 Investors in the negotiation, administration, performance or enforcement hereof. 

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

  
 14 

 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. 

 

			
	 The Company:

	
	 FORUM MERGER CORPORATION

		
	 By:
	 	 /s/ David Boris

	 Name:
	 	David Boris
	 Title:
	 	Co-Chief Executive Officer
	
	 The Investors:

	
	 FORUM INVESTORS I, LLC

		
	 By:
	 	Forum Capital Management, LLC,
		 	its managing member
		
	 By:
	 	 /s/ David Boris

	 Name:
	 	David Boris
	 Title:
	 	Member
	  
 CLEARLAKE CAPITAL PARTNERS III (MASTER),
L.P.

		
		 	By: Clearlake Capital Partners III, GP, L.P.
		 	Its: General Partner
		 	By: Clearlake Capital Partners, LLC
		 	Its: General Partner
		 	 By: CCG Operations, LLC

		 	Its: Managing Member
		
	 By:  
	 	 /s/ Behdad Eghbali

		
	 Name:
	 	Behdad Eghbali
	 Title:
	 	Manager
	 Address:
	 	233 Wilshire Blvd., Suite 800
		 	Santa Monica, CA 90401

 [Signature Page to Registration Rights Agreement] 

  
 15 

 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. 

 

			
	The Investors (continued):
	
	Name of Investor:
[                                         
            ]
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	Address for Notice:
		
	Address:	 	  

		
	 	 	 
		
	 	 	 
		
	 	 	 
	Facsimile No.:	 	  

		
	Telephone No.:	 	  

		
	Email:	 	  

		 	

  
 16 

 EXHIBIT A 

INVESTORS 
  

	
	Name
	
Forum Investors I, LLC
 135 East 57th Street

8th Floor
 New York, New York 10022

Attn: Chief Executive Officer

	
Clearlake Capital Partners III (Master), L.P.
 c/o Clearlake
Capital Group
 233 Wilshire Blvd., Suite 800
 Santa Monica, CA
90401

	
John A. McKenna, Jr.
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
John Lyons
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Jeffrey Nachbor
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Paul Maier
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Gerald G. Pearce, Jr.
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Richard Scott Ford
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Adam Cooperman
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

	
Erik Cline
  

                          
                                         
                                         
                                         
                                         
                                       

 

                          
                                         
                                         
                                         
                                         
                                       

 

  
 17EX-10.1

 Exhibit 10.1 

SUBSCRIPTION AGREEMENT 
 Forum Merger
Corporation 
 c/o Forum Investors I, LLC 
 135 East 57th Street 
 8th Floor 

New York, New York 10022 
 November
[    ], 2017 
 Ladies and Gentlemen: 

In connection with the proposed business combination (the “Transaction”) between Forum Merger Corporation, a Delaware
corporation (the “Company”), and C1 Investment Corp., a Delaware corporation (“C1”), pursuant to a contemplated Agreement and Plan of Merger among the Company, C1 and the other parties thereto (as may be amended
and/or restated, the “Transaction Agreement”), the Company is seeking commitments to purchase shares (the “Shares”) of the Company’s Class A common stock, par value $0.0001 per share (the “Common
Stock”) for a purchase price of $8.00 per share (the “Purchase Price”). The Company is offering the Shares in a private placement in which the Company expects to raise an aggregate of up to $100 million (subject to
increase or decrease in the discretion of the Company) after consultation with the Placement Agents (as defined below)). In connection therewith, the undersigned and the Company agree as follows: 

1. Subscription. As of the date written above (the “Subscription Date”), the undersigned hereby
irrevocably subscribes for and agrees to purchase from the Company such number of Shares as is set forth on the signature page of this Subscription Agreement at the Purchase Price and on the terms provided for herein. The undersigned understands and
agrees that the Company reserves the right to accept or reject the undersigned’s subscription for the Shares for any reason or for no reason, in whole or in part, at any time prior to its acceptance by the Company, and the same shall be deemed
to be accepted by the Company, and this Subscription Agreement shall be effective and enforceable against the Company only upon the date (the “Effective Date”) this Subscription Agreement is signed by a duly authorized person by or
on behalf of the Company; the Company may do so in counterpart form. Notwithstanding the foregoing, in the event that the Company does not (i) accept the subscription, and (ii) consummate the closing of the Transaction, on or before
April 2, 2018, this Subscription Agreement shall be void and of no further effect and any monies paid by the undersigned to the Company in connection herewith shall immediately be returned to the undersigned. In the event of rejection of the
entire subscription by the Company or the termination of this Subscription Agreement in accordance with the terms hereof, the undersigned’s payment of the Purchase Price will be returned promptly to the undersigned along with this Subscription
Agreement, and this Subscription Agreement shall have no force or effect. In the event that the Company rejects the subscription in part, the undersigned may terminate this Subscription Agreement by providing notice to the Company within one
business day of receiving notification that its subscription was rejected in part. 

  
 1 

 2. Closing; Delivery of Shares. 

a. The closing of the sale of Shares contemplated hereby (the “Closing”) is contingent upon the substantially concurrent
consummation of the Transaction on the terms set forth in the Transaction Agreement. The Closing shall occur on the date of, and immediately prior to, the consummation of the Transaction. Upon (i) satisfaction of the conditions set forth in
Section 3 below and (ii) not less than five (5) business days’ written notice from (or on behalf of) the Company to the undersigned (the “Closing Notice”), that the Company reasonably expects all conditions to
the closing of the Transaction to be satisfied on a date that is not less than five (5) business days from the date of the Closing Notice, the undersigned shall deliver to the Company on the closing date specified in the Closing Notice (the
“Closing Date”) the Purchase Price for the Shares subscribed by wire transfer of United States dollars in immediately available funds to the account specified by the Company in the Closing Notice against delivery to the undersigned
of the Shares in certificated form as set forth in subsection 2(b) below. This Subscription Agreement shall terminate and be of no further force or effect, without any liability to either party hereto, if the Company notifies the undersigned in
writing that it has abandoned its plans to move forward with the Transaction and/or terminates the undersigned’s obligations without the delivery of the Shares having occurred. 

b. (i) Immediately upon the Closing, the Company shall deliver (or cause the delivery of) the Shares in certificated form with restrictive
legends in the amount as set forth on the signature page to each of the undersigned that elects the first delivery as indicated on the signature page or to a custodian designated by such undersigned, as applicable, as indicated below; and 

(ii) within five trading days of the effective date of the registration statement registering all the Shares, the Company shall deliver (or
cause the delivery of) the Shares in certificated form with restrictive legends in the amount as set forth in the signature page to each of the undersigned who elects the second delivery as indicated on the signature page, or to a custodian
designated by such undersigned, as applicable, as indicated below. 
 3. Closing Conditions. The Closing is also
subject to the conditions that, on the Closing Date: 
 a. no suspension of the qualification of the Shares for offering or sale or trading
in any jurisdiction, or initiation or threatening of any proceedings for any of such purposes, shall have occurred; 
 b. all
representations and warranties of the Company and the undersigned contained in this Subscription Agreement shall be true and correct in all material respects (other than representations and warranties that are qualified as to materiality or Material
Adverse Effect (as defined herein), which representations and warranties shall be true in all respects) at and as of the Closing Date, and consummation of the Closing shall constitute a reaffirmation by each of the Company and the undersigned of
each of the representations, warranties and agreements of each such party contained in this Subscription Agreement as of the Closing Date; 

  
 2 

 c. no applicable governmental authority shall have enacted, issued, promulgated, enforced or
entered any judgment, order, law, rule or regulation (whether temporary, preliminary or permanent) which is then in effect and has the effect of making consummation of the transactions contemplated hereby illegal or otherwise restraining or
prohibiting consummation of the transactions contemplated hereby, and no governmental authority shall have instituted or threatened in writing a proceeding seeking to impose any such restraint or prohibition; 

d. there is no Material Adverse Change (as defined in the Transaction Agreement) with respect to the Company or C1; and 

e. all conditions precedent to the closing of the Transaction, including the approval of the Company’s shareholders, shall have been
satisfied or waived (other than those conditions which, by their nature, are to be satisfied at the closing of the Transaction). 

4. Further Assurances. At the Closing, the parties hereto shall execute and deliver such additional documents and take
such additional actions as the parties reasonably may deem to be practical and necessary in order to consummate the subscription as contemplated by this Subscription Agreement. 

5. Company Representations and Warranties. The Company represents and warrants to the undersigned that: 

a. The Company has been duly incorporated, is validly existing and is in good standing under the laws of the State of Delaware, with corporate
power and authority to own, lease and operate its properties and conduct its business as presently conducted and to enter into, deliver and perform its obligations under this Subscription Agreement. 

b. The Shares have been duly authorized and, when issued and delivered to the undersigned against full payment therefor in accordance with the
terms of this Subscription Agreement, the Shares will be validly issued, fully paid and non-assessable and will not have been issued in violation of or subject to any preemptive or similar rights created under
the Company’s Amended and Restated Certificate of Incorporation (as amended) or under the laws of the State of Delaware. 
 c. This
Subscription Agreement have been duly authorized, executed and delivered by the Company and are enforceable against the Company in accordance with their respective terms, except as may be limited or otherwise affected by (i) bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the rights of creditors generally, and (ii) principles of equity, whether considered at law or equity. 

d. The issuance and sale of the Shares and the compliance by the Company with all of the provisions of this Subscription Agreement and the
consummation of the transactions herein will be done in accordance with the NASDAQ marketplace rules and will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, or result in the
creation or imposition of any lien, charge or encumbrance upon any of the 

  
 3 

 
property or assets of the Company or any of its subsidiaries pursuant to the terms of (i) any indenture, mortgage, deed of trust, loan agreement, license, lease or any other agreement or
instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company is subject, which would have a material adverse effect on the
business, properties, financial condition, stockholders’ equity or results of operations of the Company (a “Material Adverse Effect”) or materially affect the validity of the Shares or the legal authority of the Company to
comply in all material respects with the terms of this Subscription Agreement; (ii) result in any violation of the provisions of the organizational documents of the Company; or (iii) result in any violation of any statute or any judgment,
order, rule or regulation of any court or governmental agency or body, domestic or foreign, having jurisdiction over the Company or any of its properties that would have a Material Adverse Effect or materially affect the validity of the Shares or
the legal authority of the Company to comply with this Subscription Agreement; subject, in the case of the foregoing clauses (i) and (iii) with respect to the consummation of the transactions therein contemplated. 

e. The Company has not entered into any agreement or arrangement entitling any agent, broker, investment banker, financial advisor or other
person to any broker’s or finder’s fee or any other commission or similar fee in connection with the transactions contemplated by this Subscription Agreement for which the undersigned could become liable. Other than Evercore Group, L.L.C.,
Cowen and Company, LLC and EarlyBirdCapital, Inc. (collectively, the “Placement Agents”), the Company is not aware of any person that has been or will be paid (directly or indirectly) remuneration for solicitation of purchasers in
connection with the sale of any Shares. 
 f. The Company understands that the foregoing representations and warranties shall be deemed
material and to have been relied upon by the undersigned. 
 g. The Company is not, and immediately after receipt of payment for the Shares,
will not be, an “investment company” within the meaning of the Investment Company Act of 1940, as amended. 
 h. Assuming the
accuracy of the subscriber representations and warranties set forth in Section 6, in connection with the offer, sale and delivery of the Shares in the manner contemplated by this Agreement, it is not necessary to register the Shares under the
Securities Act. 
 i. The Company shall use its reasonable best efforts to cause the Transaction Agreement relating to the Transaction to
include (i) a provision naming the Placement Agents and any other placement agents engaged by the Company in connection with the Transaction and the subscribers named herein as third party beneficiaries of the representations and warranties of
C1 (including, without limitation, representations and warranties relating to the accuracy and completeness of the Investor Disclosure Package (as defined below)) contained therein and (ii) a provision naming the subscribers named herein as
third party beneficiaries of the covenants of C1 contained therein; provided, however, the subscribers named herein understand and agree that the Company may waive compliance with such covenants in its sole and absolute discretion. 

  
 4 

 6. Subscriber Representations and Warranties. The undersigned represents and
warrants to the Company that: 
 a. The undersigned is (i) an institutional “accredited investor” (within the meaning of Rule
501(a)(1), (2), (3) or (7) under the Securities Act of 1933, as amended (the “Securities Act”), in each case, satisfying the requirements set forth on Schedule A hereto, and (ii) is acquiring the Shares only for
his, her or its own account and (iii) not for the account of others, and not on behalf of any other account or person or with a view to, or for offer or sale in connection with, any distribution thereof in violation of the Securities Act (and
shall provide the requested information on Schedule A following the signature page hereto). The undersigned is not an entity formed for the specific purpose of acquiring the Shares. 

b. The undersigned understands that the Shares are being offered in a transaction not involving any public offering within the meaning of the
Securities Act and that the Shares delivered at the Closing have not been registered under the Securities Act. The undersigned understands that the Shares may not be resold, transferred, pledged or otherwise disposed of by the undersigned absent an
effective registration statement under the Securities Act except (i) to the Company or a subsidiary thereof, (ii) to non-U.S. persons pursuant to offers and sales that occur outside the United States
within the meaning of Regulation S under the Securities Act or (iii) pursuant to another applicable exemption from the registration requirements of the Securities Act, and in each of cases (i) and (iii) in accordance with any applicable
securities laws of the states and other jurisdictions of the United States, and that any certificates representing the Shares delivered at the Closing shall contain a legend to such effect. The undersigned acknowledges that the Shares will not be
eligible for resale pursuant to Rule 144A promulgated under the Securities Act. The undersigned understands and agrees that the Shares, until registered under an effective registration statement, will be subject to transfer restrictions and, as a
result of these transfer restrictions, the undersigned may not be able to readily resell the Shares and may be required to bear the financial risk of an investment in the Shares for an indefinite period of time. The undersigned understands that it
has been advised to consult legal counsel prior to making any offer, resale, pledge or transfer of any of the Shares. 
 c. The undersigned
understands and agrees that the undersigned is purchasing Shares directly from the Company. The undersigned further acknowledges that there have been no representations, warranties, covenants and agreements made to the undersigned by the Company, or
any of its officers or directors, expressly or by implication, other than those representations, warranties, covenants and agreements included in this Subscription Agreement. 

d. The undersigned’s acquisition and holding of the Shares will not constitute or result in a
non-exempt prohibited transaction under Section 406 of the Employee Retirement Income Security Act of 1974, as amended, Section 4975 of the Internal Revenue Code of 1986, as amended, or any
applicable similar law. 
 e. The undersigned acknowledges and agrees that the undersigned has received such information as the undersigned
deems necessary in order to make an investment decision with respect to the Shares. Without limiting the generality of the foregoing, the undersigned 

  
 5 

 
acknowledges that it has reviewed (i) the Company’s filings with the United States Securities and Exchange Commission (the “SEC”) and (ii) the investor disclosure
package provided to the undersigned, dated September 22, 2017 (the “Investor Disclosure Package”). The undersigned represents and agrees that the undersigned and the undersigned’s professional advisor(s), if any, have had
the full opportunity to ask the Company’s management questions, receive such answers and obtain such information as the undersigned and such undersigned’s professional advisor(s), if any, have deemed necessary to make an investment
decision with respect to the Shares. The undersigned further acknowledges that the information contained in the Investor Disclosure Package is preliminary and subject to change, and that any changes to the information contained in the Investor
Disclosure Package, including, without limitation, any changes based on updated information or changes in terms of the Transaction, shall in no way affect the undersigned’s obligation to purchase the Shares hereunder, except as otherwise
provided herein. 
 f. The undersigned became aware of this offering of the Shares solely by means of direct contact between the undersigned
and the Company, the Placement Agents or a representative of the Company or Placement Agents, and the Shares were offered to the undersigned solely by direct contact between the undersigned and the Company, the Placement Agents or a representative
of the Company or Placement Agents. The undersigned did not become aware of this offering of the Shares, nor were the Shares offered to the undersigned, by any other means. For the avoidance of doubt, the undersigned did not become aware of this
offering of the Securities by contact with any of C1’s representatives or any materials it received from C1 or its representatives. The undersigned acknowledges that the Company represents and warrants that the Shares (i) were not offered
by any form of general solicitation or general advertising and (ii) are not being offered in a manner involving a public offering under, or in a distribution in violation of, the Securities Act, or any state securities laws. 

g. The undersigned acknowledges that it is aware that there are substantial risks incident to the purchase and ownership of the Shares,
including those set forth in the Investor Disclosure Package and in the Company’s filings with the SEC. The undersigned has such knowledge and experience in financial and business matters as to be capable of evaluating the merits and risks of
an investment in the Shares, and the undersigned has sought such accounting, legal and tax advice as the undersigned has considered necessary to make an informed investment decision. 

h. Alone, or together with any professional advisor(s), the undersigned has adequately analyzed and fully considered the risks of an
investment in the Shares and determined that the Shares are a suitable investment for the undersigned and that the undersigned is able at this time and in the foreseeable future to bear the economic risk of a total loss of the undersigned’s
investment in the Company. The undersigned acknowledges specifically that a possibility of total loss exists. 
 i. In making its decision
to purchase the Shares, the undersigned has relied solely upon independent investigation made by the undersigned. Without limiting the generality of the foregoing, the undersigned has not relied on any statements or other information provided by the
Placement Agents concerning the Company or the Shares or the offer and sale of the Shares. 

  
 6 

 j. The undersigned understands and agrees that no federal or state agency has passed upon or
endorsed the merits of the offering of the Shares or made any findings or determination as to the fairness of this investment or the accuracy or adequacy of the Investor Disclosure Package. 

k. The undersigned has been duly formed or incorporated and is validly existing in good standing under the laws of its jurisdiction of
incorporation or formation. 
 l. The execution, delivery and performance by the undersigned of this Subscription Agreement are within the
powers of the undersigned, have been duly authorized and will not constitute or result in a breach or default under or conflict with any order, ruling or regulation of any court or other tribunal or of any governmental commission or agency, or any
agreement or other undertaking, to which the undersigned is a party or by which the undersigned is bound, and, if the undersigned is not an individual, will not violate any provisions of the undersigned’s charter documents, including, without
limitation, its incorporation or formation papers, bylaws, indenture of trust or partnership or operating agreement, as may be applicable. The signature on this Subscription Agreement is genuine, and the signatory, if the undersigned is an
individual, has legal competence and capacity to execute the same or, if the undersigned is not an individual the signatory has been duly authorized to execute the same, and this Subscription Agreement constitutes a legal, valid and binding
obligation of the undersigned, enforceable against the undersigned in accordance with its terms. 
 m. Neither the due diligence
investigation conducted by the undersigned in connection with making its decision to acquire the Shares nor any representations and warranties made by the undersigned herein shall modify, amend or affect the undersigned’s right to rely on the
truth, accuracy and completeness of the Company’s representations and warranties contained herein. 
 n. The undersigned is not
(i) a person or entity named on the List of Specially Designated Nationals and Blocked Persons administered by the U.S. Treasury Department’s Office of Foreign Assets Control (“OFAC”) or in any Executive Order issued by
the President of the United States and administered by OFAC (“OFAC List”), or a person or entity prohibited by any OFAC sanctions program, (ii) a Designated National as defined in the Cuban Assets Control Regulations, 31 C.F.R.
Part 515, or (iii) a non-U.S. shell bank or providing banking services indirectly to a non-U.S. shell bank (collectively, a “Prohibited Investor”).
The undersigned agrees to provide law enforcement agencies, if requested thereby, such records as required by applicable law, provided that the undersigned is permitted to do so under applicable law. If the undersigned is a financial institution
subject to the Bank Secrecy Act (31 U.S.C. Section 5311 et seq.) (the “BSA”), as amended by the USA PATRIOT Act of 2001 (the “PATRIOT Act”), and its implementing regulations (collectively, the
“BSA/PATRIOT Act”), the undersigned maintains policies and procedures reasonably designed to comply with applicable obligations under the BSA/PATRIOT Act. To the extent required, it maintains policies and procedures reasonably
designed for the screening of its investors against the OFAC sanctions programs, including the OFAC List. To the extent required, it maintains policies and procedures reasonably designed to ensure that the funds held by the undersigned and used to
purchase the Shares were legally derived. 

  
 7 

 o. No disclosure or offering document has been prepared by the Placement Agents in connection
with the offer and sale of the Shares. 
 p. The Placement Agents and each of their members, directors, officers, employees, representatives
and controlling persons have made no independent investigation with respect to the Company or the Shares or the accuracy, completeness or adequacy of any information supplied to the undersigned by the Company. 

q. In connection with the issue and purchase of the Shares, the Placement Agents have not acted as the undersigned’s financial advisor or
fiduciary. 
 7. Registration Rights. The Company agrees that, within thirty (30) calendar days after the
consummation of the Transaction, the Company (or its successor) will file with the SEC (at the Company’s sole cost and expense) a registration statement registering the resale of the Shares (the “Registration Statement”), and
the Company shall use its commercially reasonable efforts to have the Registration Statement declared effective as soon as practicable after the filing thereof. The Company agrees that the Company will cause such Registration Statement or another
registration statement (which may be a “shelf” registration statement) to remain effective until the earlier of (i) two years from the issuance of the Shares, or (ii) on the first date on which the undersigned can sell all of its
Shares (or shares received in exchange therefor) under Rule 144 of the Securities Act without limitation as to the manner of sale or the amount of such securities that may be sold. The undersigned agrees to disclose its beneficial ownership, as
determined in accordance with Rule 13d-3 of the Securities Exchange Act of 1934 (as amended, the “Exchange Act”), of Shares to the Company (or its successor) upon request to assist the Company
in making the determination described above. The Company’s obligations to include the Shares in the Registration Statement are contingent upon the undersigned furnishing in writing to the Company such information regarding the undersigned, the
securities of the Company held by the undersigned and the intended method of disposition of the Shares as shall be reasonably requested by the Company to effect the registration of the Shares, and shall execute such documents in connection with such
registration as the Company may reasonably request that are customary of a selling stockholder in similar situations. The Company may suspend the use of any such registration statement if it determines in the opinion of counsel for the Company that
in order for the registration statement to not contain a material misstatement or omission, an amendment thereto would be needed to include information that would at that time not otherwise be required in a current, quarterly, or annual report under
the Exchange Act, as amended; provided, that, the Company shall use commercially reasonable efforts to make such registration statement available for the sale by the undersigned of such securities as soon as practicable thereafter. 

8. Termination. This Subscription Agreement shall terminate and be void and of no further force and effect, and all
rights and obligations of the parties hereunder shall terminate without any further liability on the part of any party in respect thereof, upon the earlier to occur of (a) such date and time as the Transaction Agreement is terminated in
accordance with its terms, (b) upon the mutual written agreement of each of the parties hereto to terminate this Subscription Agreement or (c) if any of the conditions to Closing set forth in Section 3 of this

  
 8 

 
Subscription Agreement are not satisfied or waived on or prior to the Closing and, as a result thereof, the transactions contemplated by this Subscription Agreement are not consummated at the
Closing; provided that nothing herein will relieve any party from liability for any willful breach hereof prior to the time of termination, and each party will be entitled to any remedies at law or in equity to recover losses, liabilities or
damages arising from such breach. The Company shall promptly notify the undersigned of the termination of the Transaction Agreement promptly after the termination of such agreement. 

9. Trust Account Waiver. Reference is made to the final prospectus of the Company, filed with the SEC (File No. 333-216842) (the “Prospectus”), and dated as of April 6, 2017. The Company shall provide the undersigned with a copy of the Prospectus upon request and the undersigned hereby
represents and warrants that it has read the Prospectus and understands that the Company has established a trust account (the “Trust Account”) containing the proceeds of its initial public offering (the “IPO”) and
from certain private placements occurring simultaneously with the IPO (including interest accrued from time to time thereon) for the benefit of the Company’s public stockholders (including overallotment shares acquired by the Company’s
underwriters, the “Public Stockholders”), and that, except as otherwise described in the Prospectus, the Company may disburse monies from the Trust Account only: (a) to the Public Stockholders in the event they elect to redeem
their Company shares in connection with the consummation of the Company’s initial business combination (as such term is used in the Prospectus) (the “Business Combination”) or in connection with an extension of the deadline to
consummate a Business Combination, (b) to the Public Stockholders if the Company fails to consummate a Business Combination within twenty-four (24) months after the closing of the IPO, (c) with respect to any interest earned on the
amounts held in the Trust Account, as necessary to pay any franchise or income taxes or (d) to the Company after or concurrently with the consummation of a Business Combination. For and in consideration of the Company entering into this
Subscription Agreement, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the undersigned hereby agrees on behalf of itself and its respective affiliates that, notwithstanding anything to the
contrary in this Subscription Agreement, neither the Company nor any of its respective affiliates do now or shall at any time hereafter have any right, title, interest or claim of any kind in or to any monies in the Trust Account or distributions
therefrom, or make any claim against the Trust Account (including any distributions therefrom, regardless of whether such claim arises as a result of, in connection with or relating in any way to this Subscription Agreement between the Company or
its Representatives (as defined below), on the one hand, and the Company or its Representatives, on the other hand, this Subscription Agreement or any other matter, and regardless of whether such claim arises based on contract, tort, equity or any
other theory of legal liability (any and all such claims are collectively referred to hereafter as the “Released Claims”). The undersigned, on behalf of itself and its affiliates, hereby irrevocably waives any Released Claims that
the undersigned or its affiliates may have against the Trust Account now (including any distributions therefrom) or in the future as a result of, or arising out of, any negotiations, contracts or agreements with the Company or its Representatives
and will not seek recourse against the Trust Account (including any distributions therefrom) for any reason whatsoever (including for an alleged breach of any agreement with the Company or its affiliates). The undersigned agrees and acknowledges
that such irrevocable waiver is material to this Subscription Agreement and specifically relied upon by the Company and its affiliates to induce the Company to enter in this 

  
 9 

 
Subscription Agreement, and the Company further intends and understands such waiver to be valid, binding and enforceable against the undersigned and each of its affiliates under applicable law.
To the extent the undersigned or any of its affiliates commences any action or proceeding based upon, in connection with, relating to or arising out of any matter relating to the Company or its Representatives, which proceeding seeks, in whole or in
part, monetary relief against the Company or its Representatives, the undersigned hereby acknowledges and agrees that the Company’s and its affiliates’ sole remedy shall be against funds held outside of the Trust Account and that such
claim shall not permit the Company or its affiliates (or any person claiming on any of their behalves or in lieu of any of them) to have any claim against the Trust Account (including any distributions therefrom) or any amounts contained therein. In
the event the Company any of its affiliates commences any action or proceeding based upon, in connection with, relating to or arising out of any matter relating to the Company or its Representatives, which proceeding seeks, in whole or in part,
relief against the Trust Account (including any distributions therefrom) or the Public Stockholders, whether in the form of money damages or injunctive relief, the Company and its Representatives, as applicable, shall be entitled to recover from the
undersigned and its affiliates the associated legal fees and costs in connection with any such action, in the event the Company or its Representatives, as applicable, prevails in such action or proceeding. For purposes of this Subscription
Agreement, “Representatives” with respect to any person shall mean such person’s affiliates and its and its affiliate’s respective directors, officers, employees, consultants, advisors, agents and other representatives.

 10. Miscellaneous. 

a. Neither this Subscription Agreement nor any rights that may accrue to the undersigned hereunder (other than the Shares acquired hereunder,
if any) may be transferred or assigned. 
 b. The Company may request from the undersigned such additional information as the Company may
deem necessary to evaluate the eligibility of the undersigned to acquire the Shares, and the undersigned shall provide such information as may reasonably be requested, to the extent readily available and to the extent consistent with its internal
policies and procedures. 
 c. The undersigned acknowledges that the Company, the Placement Agents and others will rely on the
acknowledgments, understandings, agreements, representations and warranties contained in this Subscription Agreement. Prior to the Closing, the undersigned agrees to promptly notify the Company if any of the acknowledgments, understandings,
agreements, representations and warranties set forth herein are no longer accurate. The undersigned agrees that each purchase by the undersigned of Shares from the Company will constitute a reaffirmation of the acknowledgments, understandings,
agreements, representations and warranties herein (as modified by any such notice) by the undersigned as of the time of such purchase. The undersigned further acknowledges and agrees that the Placement Agents are a third-party beneficiary of the
representations and warranties of the undersigned contained in Section 6 of this Subscription Agreement. 
 d. The Company is entitled
to rely upon this Subscription Agreement and is irrevocably authorized to produce this Subscription Agreement or a copy hereof to any interested party in any administrative or legal proceeding or official inquiry with respect to the matters covered
hereby. 

  
 10 

 e. All the agreements, representations and warranties made by each party hereto in this
Subscription Agreement shall survive the Closing. 
 g. This Subscription Agreement may not be modified, waived or terminated except by an
instrument in writing, signed by the party against whom enforcement of such modification, waiver, or termination is sought. 
 h. This
Subscription Agreement constitutes the entire agreement, and supersedes all other prior agreements, understandings, representations and warranties, both written and oral, among the parties, with respect to the subject matter hereof. This
Subscription Agreement shall not confer any rights or remedies upon any person other than the parties hereto, and their respective successor and assigns. 

i. Except as otherwise provided herein, this Subscription Agreement shall be binding upon, and inure to the benefit of the parties hereto and
their heirs, executors, administrators, successors, legal representatives, and permitted assigns, and the agreements, representations, warranties, covenants and acknowledgments contained herein shall be deemed to be made by, and be binding upon,
such heirs, executors, administrators, successors, legal representatives and permitted assigns. 
 j. If any provision of this Subscription
Agreement shall be invalid, illegal or unenforceable, the validity, legality or enforceability of the remaining provisions of this Agreement shall not in any way be affected or impaired thereby and shall continue in full force and effect. 

k. This Subscription Agreement may be executed in one or more counterparts (including by facsimile or electronic mail or in .pdf) and by
different parties in separate counterparts, with the same effect as if all parties hereto had signed the same document. All counterparts so executed and delivered shall be construed together and shall constitute one and the same agreement. 

l. The parties hereto agree that irreparable damage would occur in the event that any of the provisions of this Subscription Agreement were
not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Subscription Agreement and to enforce
specifically the terms and provisions of this Subscription Agreement, this being in addition to any other remedy to which such party is entitled at law, in equity, in contract, in tort or otherwise. 

m. THIS SUBSCRIPTION AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO
THE PRINCIPLES OF CONFLICTS OF LAWS THAT WOULD OTHERWISE REQUIRE THE APPLICATION OF THE LAW OF ANY 

  
 11 

 
OTHER STATE. EACH PARTY HERETO HEREBY WAIVES ANY RIGHT TO A JURY TRIAL IN CONNECTION WITH ANY LITIGATION PURSUANT TO THIS SUBSCRIPTION AGREEMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY. 

n. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted and
confirmed by any standard form of telecommunication. 
 Notice to the Company shall be given to: 

Forum Merger Corporation 
 c/o
Forum Investors I, LLC 
 135 East 57th Street 

8th Floor 

New York, New York 10022 
 Attn.:
David Boris 
 with a copy to (which shall not constitute notice): 

Ellenoff Grossman & Schole LLP

1345 Avenue of the Americas 
 New
York, New York 10105 
 Attn.: Tamar Donikyan, Esq. 

Notice to the Placement Agents shall be given to: 

Evercore Group L.L.C. 
 55 East
52nd Street, 36th Floor 
 New York, NY 10055 

Attn.: Tejwantie Niranjan 
 Cowen
and Company, LLC 
 599 Lexington Avenue 

New York, NY 10022, 
 Attention:
General Counsel 
 EarlyBirdCapital, Inc. 

366 Madison Avenue, 8th Floor 

New York, NY 10017 
 Attention:
Steven Levine 
 with a copy to (which shall not constitute notice): 

Fried, Frank, Harris, Shriver & Jacobson LLP 

One New York Plaza 
 New York, New
York 10004 
 Attn.: Stuart Gelfond, Esq. 

  
 12 

 Notice to C1 shall be given to: 

C1 Investment Corp. 
 3344
Highway 149 
 Eagan, MN 55121 

Attn.: Chief Financial Officer 

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

Cooley LLP 
 3175 Hanover Street

 Palo Alto, CA 94304-1130 

Attn.: John T. McKenna, Esq. 

11. Non-Reliance and Exculpation. The undersigned acknowledges that it is not relying upon, and
has not relied upon, any statement, representation or warranty made by any person, firm or corporation (including, without limitation, the Placement Agents, any of their affiliates or any of its or their control persons, officers, directors and
employees), other than the statements, representations and warranties contained in this Subscription Agreement, in making its investment or decision to invest in the Company. The undersigned agrees that neither (i) any other purchaser pursuant
to this Subscription Agreement or any other Subscription Agreement related to the private placement of the Shares (including the respective controlling persons, members, officers, directors, partners, agents, or employees of any purchaser) nor
(ii) Placement Agents, their affiliates or any of its or their control persons, officers, directors or employees, shall be liable to any other purchaser pursuant to this Subscription Agreement or any other Subscription Agreement related to the
private placement of the Shares for any action heretofore or hereafter taken or omitted to be taken by any of them in connection with the purchase of the Shares. 

[SIGNATURE PAGES FOLLOW] 

  
 13 

 IN WITNESS WHEREOF, the parties hereto have caused this Subscription Agreement to be duly
executed by their respective authorized signatories as of the date first indicated above. 
  

					
	FORUM MERGER CORPORATION 	  	 Address for Notice:
  

Forum Merger Corporation
 c/o Forum Investors I, LLC

135 East 57th Street
 8th Floor

New York, New York 10022

		  		  	Email: david@forummerger.com                

			
	By:	 	  

	Name:	 	David Boris
	Title:	 	Co-Chief Executive Officer

  
 14 

 [PURCHASER SIGNATURE PAGES TO SUBSCRIPTION AGREEMENT] 

IN WITNESS WHEREOF, the undersigned have caused this Subscription Agreement to be duly executed by their respective authorized signatories as
of the date first indicated above. 

Name(s) of Subscriber:                    
                                         
                                         
                                         
                            

Signature of Authorized Signatory of Subscriber:            
                                         
                                         
                                    

Name of Authorized Signatory:                  
                                         
                                         
                                         
                 

Title of Authorized Signatory:                  
                                         
                                         
                                         
                   

Email Address of Authorized Signatory:                
                                         
                                         
                                         
     

Facsimile Number of Authorized Signatory:                
                                         
                                         
                                        

Address for Notice to Subscriber: 
 Address for Delivery of
Shares to Subscriber (if not same as address for notice): 
 [    ] First Delivery 

Subscription Amount: $                     

Shares:                      

EIN Number:                      

[    ] Second Delivery 
 Subscription
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