Document:

EX-10.3

 Exhibit 10.3 

INVESTMENT MANAGEMENT TRUST AGREEMENT 

This Investment Management Trust Agreement (this “Agreement”) is made effective as of [●], 2017, by and between
Mosaic Acquisition Corp., a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”). 

WHEREAS, the Company’s registration statement on Form S-1, Registration Statement No. 333-[●] (the “Registration Statement”) and prospectus (the “Prospectus”) for the initial public offering of the Company’s units (the
“Units”), each of which consists of one share of the Company’s Class A ordinary shares, par value $0.0001 per Ordinary Share (the “Ordinary Shares”), and
one-third of one warrant, each whole warrant entitling the holder thereof to purchase one Ordinary Share (such initial public offering hereinafter referred to as the “Offering”), has
been declared effective as of the date hereof by the U.S. Securities and Exchange Commission; and 
 WHEREAS, the Company has entered
into an Underwriting Agreement (the “Underwriting Agreement”) with Deutsche Bank Securities Inc., RBC Capital Markets, LLC and J.P. Morgan Securities LLC, as representatives (the “Representatives”) of
the several underwriters (the “Underwriters”) named therein; and 
 WHEREAS, as described in the Registration
Statement, an aggregate of $300,000,000 from the proceeds of the Offering and sale of the Private Placement Warrants (as defined in the Underwriting Agreement) (or $345,000,000 if the Underwriters’ over-allotment option is exercised in full)
will be delivered to the Trustee to be deposited and held in a segregated trust account located at all times in the United States (the “Trust Account”) for the benefit of the Company and the holders of Ordinary Shares
included in the Units issued in the Offering as hereinafter provided (the amount to be delivered to the Trustee (and any interest subsequently earned thereon) is referred to herein as the “Property,” the shareholders for
whose benefit the Trustee shall hold the Property will be referred to as the “Public Shareholders,” and the Public Shareholders and the Company will be referred to together as the “Beneficiaries”); and

 WHEREAS, pursuant to the Underwriting Agreement, a portion of the Property equal to $10,500,000, or $12,075,000 if the
Underwriters’ over-allotment option is exercised in full is attributable to deferred underwriting discounts and commissions that may be payable by the Company to the Underwriters upon the consummation of the Business Combination (as defined
below) (the “Deferred Discount”); and 
 WHEREAS, the Company and the Trustee desire to enter into this
Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold the Property. 
 NOW THEREFORE, IT IS AGREED: 

1.    Agreements and Covenants of Trustee. The Trustee hereby agrees and covenants to: 

(a)    Hold the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust
Account established by the Trustee at a branch office of J.P. Morgan Chase Bank, N.A. located in the United States and at a brokerage institution selected by the Trustee that is reasonably satisfactory to the Company; 

 (b)    Manage, supervise and administer the Trust Account subject to the
terms and conditions set forth herein; 
 (c)    In a timely manner, but only after the written instruction of the
Company, invest and reinvest the Property in United States government securities within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of 180 days or less, or in money market funds meeting
the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under the Investment Company Act of 1940, as amended, which invest only in direct U.S. government treasury obligations,
as determined by the Company; the Trustee may not invest in any other securities or assets, it being understood that the Trust Account will earn no interest while account funds are uninvested awaiting the Company’s instructions hereunder; 

(d)    Collect and receive, when due, all interest or other income arising from the Property, which shall become part of
the “Property,” as such term is used herein; 
 (e)    Promptly notify the Company and the Representatives of
all communications received by the Trustee with respect to any Property requiring action by the Company; 

(f)    Supply any necessary information or documents as may be requested by the Company (or its authorized agents) in
connection with the Company’s preparation of the tax returns relating to assets held in the Trust Account; 

(g)    Participate in any plan or proceeding for protecting or enforcing any right or interest arising from the Property
if, as and when instructed by the Company to do so; 
 (h)    Render to the Company monthly written statements of the
activities of, and amounts in, the Trust Account reflecting all receipts and disbursements of the Trust Account; 

(i)    Commence liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance
with, the terms of a letter from the Company (“Termination Letter”) in a form substantially similar to that attached hereto as either Exhibit A or Exhibit B signed on behalf of the Company by its Chief Executive Officer,
Chief Financial Officer or Chairman of the board of directors (the “Board”) or other authorized officer of the Company, and complete the liquidation of the Trust Account and distribute the Property in the Trust Account,
including interest earned on the funds held in the Trust Account and not previously released to the Company to fund its working capital requirements, subject to an annual limit of $750,000, and/or to pay its taxes (less up to $100,000 of interest
that may be released to the Company to pay dissolution expenses), only as directed in the Termination Letter and the other documents referred to therein; or (y) upon the date which is 24 months after the closing of the Offering (or 27 months
from the closing of the Offering if the Company has executed a letter of intent, agreement in principle or definitive agreement for an initial Business Combination before the 24-month period ends), if a
Termination Letter has not been received by 

  
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 the Trustee prior to such date, in which case the Trust Account shall be liquidated in accordance with the
procedures set forth in the Termination Letter attached as Exhibit B and the Property in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Company to fund its working capital
requirements, subject to an annual limit of $750,000, and/or to pay its taxes (less up to $100,000 of interest that may be released to the Company to pay dissolution expenses), shall be distributed to the Public Shareholders of record as of such
date; provided, however, that in the event the Trustee receives a Termination Letter in a form substantially similar to Exhibit B hereto, or if the Trustee begins to liquidate the Property because it has received no such Termination
Letter by the date specified in clause (y) of this Section 1(i), the Trustee shall keep the Trust Account open until twelve (12) months following the date the Property has been distributed to the Public Shareholders; 

(j)    Upon written request from the Company, which may be given from time to time in a form substantially similar to that
attached hereto as Exhibit C (a “Tax Payment Withdrawal Instruction”), withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property requested by the Company to cover any tax
obligation owed by the Company as a result of assets of the Company or interest or other income earned on the Property, which amount shall be delivered directly to the Company by electronic funds transfer or other method of prompt payment, and the
Company shall forward such payment to the relevant taxing authority; provided, however, that to the extent there is not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall liquidate such assets held in
the Trust Account as shall be designated by the Company in writing to make such distribution, so long as there is no reduction in the principal amount initially deposited in the Trust Account; provided, further, that if the tax to be
paid is a franchise tax, the written request by the Company to make such distribution shall be accompanied by a copy of the franchise tax bill for the Company and a written statement from the principal financial officer of the Company setting forth
the actual amount payable (it being acknowledged and agreed that any such amount in excess of interest income earned on the Property shall not be payable from the Trust Account). The written request of the Company referenced above shall constitute
presumptive evidence that the Company is entitled to said funds, and the Trustee shall have no responsibility to look beyond said request; 

(k)    Upon written request from the Company, which may be given from time to time in a form substantially similar to that
attached hereto as Exhibit D (a “Shareholder Redemption Withdrawal Instruction”), the Trustee shall distribute on behalf of the Company the amount requested by the Company to be used to redeem Ordinary Shares from Public
Shareholders properly submitted in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association to modify the substance or timing of the Company’s obligation to
redeem 100% of its Ordinary Shares if the Company has not consummated an initial Business Combination within such time as is described in the Company’s amended and restated memorandum and articles of association. The written request of the
Company referenced above shall constitute presumptive evidence that the Company is entitled to distribute said funds, and the Trustee shall have no responsibility to look beyond said request; and 

(l)    Not make any withdrawals or distributions from the Trust Account other than pursuant to Section 1(i), (j) or
(k) above. 

  
 3 

 2.    Agreements and Covenants of the Company. The Company hereby
agrees and covenants to: 
 (a)    Give all instructions to the Trustee hereunder in writing, signed by the
Company’s Chairman of the Board, Chief Executive Officer or Chief Financial Officer. In addition, except with respect to its duties under Sections 1(i), 1(j) and 1(k) hereof, the Trustee shall be entitled to rely on, and
shall be protected in relying on, any verbal or telephonic advice or instruction which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized above to give written instructions, provided that the
Company shall promptly confirm such instructions in writing; 
 (b)    Subject to Section 4
hereof, hold the Trustee harmless and indemnify the Trustee from and against any and all expenses, including reasonable counsel fees and disbursements, or losses suffered by the Trustee in connection with any action taken by it hereunder and in
connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with any claim or demand, which in any way arises out of or relates to this Agreement, the services of the Trustee hereunder, or
the Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s gross negligence, fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the
commencement of any action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), it shall notify the Company in writing of such claim (hereinafter referred to as the
“Indemnified Claim”). The Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided that the Trustee shall obtain the consent of the Company with respect to the selection
of counsel, which consent shall not be unreasonably withheld. The Trustee may not agree to settle any Indemnified Claim without the prior written consent of the Company, which such consent shall not be unreasonably withheld. The Company may
participate in such action with its own counsel; 
 (c)    Pay the Trustee the fees set forth on Schedule A hereto,
including an initial acceptance fee, annual administration fee, and transaction processing fee which fees shall be subject to modification by the parties from time to time. It is expressly understood that the Property shall not be used to pay such
fees unless and until it is distributed to the Company pursuant to Sections 1(i) through 1(j) hereof. The Company shall pay the Trustee the initial acceptance fee and the first annual administration fee at the consummation of the
Offering. The Trustee shall refund to the Company the annual administration fee (on a pro rata basis) with respect to any period after the liquidation of the Trust Account. The Company shall not be responsible for any other fees or charges of the
Trustee except as set forth in this Section 2(c), Schedule A and as may be provided in Section 2(b) hereof; 

(d)    In connection with any vote of the Company’s shareholders regarding a merger, share exchange, asset
acquisition, share purchase, reorganization or similar business combination involving the Company and one or more businesses (a “Business Combination”), provide to the Trustee an affidavit or certificate of the inspector of
elections for the shareholder meeting verifying the vote of such shareholders regarding such Business Combination; 

  
 4 

 (e)    Provide the Representatives with a copy of any Termination Letter(s)
and/or any other correspondence that is sent to the Trustee with respect to any proposed withdrawal from the Trust Account promptly after it issues the same; 

(f)    Instruct the Trustee to make only those distributions that are permitted under this Agreement, and refrain from
instructing the Trustee to make any distributions that are not permitted under this Agreement; and 
 (g)    Within four
(4) business days after the Underwriters exercise the over-allotment option (or any unexercised portion thereof) or such over-allotment expires, provide the Trustee with a notice in writing of the total amount of the Deferred Discount, which
shall in no event be less than $10,500,000, or $12,075,000 if the Underwriters’ over-allotment option is exercised in full. 

3.    Limitations of Liability. The Trustee shall have no responsibility or liability to: 

(a)    Imply obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document
other than this Agreement and that which is expressly set forth herein; 
 (b)    Take any action with respect to the
Property, other than as directed in Section 1 hereof, and the Trustee shall have no liability to any party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct; 

(c)    Institute any proceeding for the collection of any principal and income arising from, or institute, appear in or
defend any proceeding of any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided herein to do so and the Company shall have advanced or guaranteed to it funds sufficient
to pay any expenses incident thereto; 
 (d)    Refund any depreciation in principal of any Property; 

(e)    Assume that the authority of any person designated by the Company to give instructions hereunder shall not be
continuing unless provided otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee; 

(f)    The other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to
be taken or omitted, in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct. The Trustee may rely conclusively and shall be protected in acting upon any order, notice,
demand, certificate, opinion or advice of counsel (including counsel chosen by the Trustee, which counsel may be the Company’s counsel), statement, instrument, report or other paper or document (not only as to its due execution and the validity
and effectiveness of its provisions, but also as to the truth and acceptability of any information therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be signed or presented by the proper
person or persons. The Trustee shall not be bound by any notice or demand, or any waiver, modification, termination or rescission of this Agreement or any of the terms hereof, unless 

  
 5 

 evidenced by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the
duties or rights of the Trustee are affected, unless it shall give its prior written consent thereto; 
 (g)    Verify
the accuracy of the information contained in the Registration Statement; 
 (h)    Provide any assurance that any
Business Combination entered into by the Company or any other action taken by the Company is as contemplated by the Registration Statement; 

(i)    File information returns with respect to the Trust Account with any local, state or federal taxing authority or
provide periodic written statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property; 

(j)    Prepare, execute and file tax reports, income or other tax returns and pay any taxes with respect to any income
generated by, and activities relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, but not limited to, franchise and income tax obligations, except pursuant to
Section 1(j) hereof; or 
 (k)    Verify calculations, qualify or otherwise approve the
Company’s written requests for distributions pursuant to Sections 1(i), 1(j) and 1(k) hereof. 

4.    Trust Account Waiver. The Trustee has no right of set-off or any
right, title, interest or claim of any kind (“Claim”) to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have now or in the future. In
the event the Trustee has any Claim against the Company under this Agreement, including, without limitation, under Section 2(b) or Section 2(c) hereof, the Trustee shall pursue such Claim solely
against the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account. 

5.    Termination. This Agreement shall terminate as follows: 

(a)    If the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company
shall use its reasonable efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such time that the Company notifies the Trustee that a successor trustee has been appointed and has
agreed to become subject to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee, including but not limited to the transfer of copies of the reports and statements relating to the Trust
Account, whereupon this Agreement shall terminate; provided, however, that in the event that the Company does not locate a successor trustee within ninety (90) days of receipt of the resignation notice from the Trustee, the
Trustee may submit an application to have the Property deposited with any court in the State of New York or with the United States District Court for the Southern District of New York and upon such deposit, the Trustee shall be immune from any
liability whatsoever; or 

  
 6 

 (b)    At such time that the Trustee has completed the liquidation of the
Trust Account and its obligations in accordance with the provisions of Section 1(i) hereof and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement shall terminate except with
respect to Section 2(b). 
 6.    Miscellaneous. 

(a)    The Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below
with respect to funds transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating to such security procedures to authorized persons. Each party must notify the other party
immediately if it has reason to believe unauthorized persons may have obtained access to such confidential information, or of any change in its authorized personnel. In executing funds transfers, the Trustee shall rely upon all information supplied
to it by the Company, including, account names, account numbers, and all other identifying information relating to a Beneficiary, Beneficiary’s bank or intermediary bank. Except for any liability arising out of the Trustee’s gross
negligence, fraud or willful misconduct, the Trustee shall not be liable for any loss, liability or expense resulting from any error in the information or transmission of the funds. 

(b)    This Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New
York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. This Agreement may be executed in several original or facsimile counterparts, each one of which shall
constitute an original, and together shall constitute but one instrument. 
 (c)    This Agreement contains the entire
agreement and understanding of the parties hereto with respect to the subject matter hereof. Except for Sections 1(i) and 1(k) hereof (which sections may not be modified, amended or deleted without the affirmative vote of sixty five
percent (65%) or more of the then issued and outstanding Ordinary Shares and Class F ordinary shares, par value $0.0001 per share, of the Company voting together as a single class; provided that no such amendment will affect any Public
Shareholder who has otherwise indicated his election to redeem his Ordinary Shares in connection with a shareholder vote sought to amend this Agreement), this Agreement or any provision hereof may only be changed, amended or modified (other than to
correct a typographical error) by a writing signed by each of the parties hereto. 
 (d)    The parties hereto consent
to the jurisdiction and venue of any state or federal court located in the City of New York, State of New York, for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS AGREEMENT,
EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY. 
 (e)    Any notice, consent or request to be given in connection with
any of the terms or provisions of this Agreement shall be in writing and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery or by facsimile transmission: 

  
 7 

 if to the Trustee, to: 

Continental Stock Transfer & Trust Company 

One State Street, 
 30th Floor

 New York, New York 10004 

Attn: Sharmin Carter 
 E-mail:
scarter@continentalstock.com 
 if to the Company, to: 

Mosaic Acquisition Corp. 
 375
Park Avenue 
 New York, NY 10152 

Attn: Chief Financial Officer 

E-mail: whmitchell79@gmail.com 

in each case, with copies to: 

Paul, Weiss, Rifkind, Wharton & Garrison LLP 

1285 Avenue of the Americas 
 New
York, NY 10019 
 Attn: Jeffrey D. Marell, Esq. 

Raphael M. Russo, Esq. 
 Fax No.:
(212) 492-0309 
 E-mail: rrusso@paulweiss.com 

and 
 Deutsche Bank Securities
Inc. 
 60 Wall Street 
 New
York, NY 10005 
 Attn: Ravi Raghunathan 

Fax No.: (646) 666-3375 

E-mail: ravi.raghunathan@db.com 

and 
 RBC Capital Markets, LLC

 200 Vesey Street 
 New York,
NY 10281 
 Attn.: Erwin Van Der Voort 

Tel: (212) 301-1526 

E-mail: erwin.vandervoort@rbccm.com 

  
 8 

 and 

J.P. Morgan Securities LLC 
 383
Madison Avenue 
 New York, New York 10179 

Attn: Goksu Yolac 
 Tel: (212)
622-5583 
 Fax No.: (212) 622-6036 

E-mail: goksu.yolac@jpmorgan.com 

and 
 Skadden, Arps, Slate,
Meagher & Flom LLP 
 525 University Avenue 

Palo Alto, CA 94301 
 Attn: Gregg
Noel, Esq. 
 Jonathan Ko, Esq. 

Fax No.: (213) 621-5234 

E-mail: jonathan.ko@skadden.com 

and 
 Weil, Gotshal & Manges
LLP 
 767 Fifth Avenue 
 New
York, New York 10153 
 Attn: Alexander Lynch, Esq. 

Fax No.: (212) 310-8007 
 E-mail:
alex.lynch@weil.com 
 (f)    This Agreement may not be assigned by the Trustee without the prior consent of the Company.

 (g)    Each of the Company and the Trustee hereby represents that it has the full right and power and has been duly
authorized to enter into this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any funds in the Trust Account under any circumstance. 

(h)    This Agreement is the joint product of the Trustee and the Company and each provision hereof has been subject to
the mutual consultation, negotiation and agreement of such parties and shall not be construed for or against any party hereto. 

(i)    This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but
all such counterparts shall together constitute one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic transmission shall constitute valid and sufficient delivery thereof. 

(j)    Each of the Company and the Trustee hereby acknowledges and agrees that the Representatives, on behalf of the
Underwriters, are third party beneficiaries of this Agreement. 
 (k)    Except as specified herein, no party to this
Agreement may assign its rights or delegate its obligations hereunder to any other person or entity. 
 [Signature Page Follows] 

  
 9 

 IN WITNESS WHEREOF, the parties have duly executed this Investment Management Trust
Agreement as of the date first written above. 
  

									
		 		 	 Continental Stock Transfer & Trust Company, as Trustee

				
		 		 	By:	 	  

		 		 		 	Name:	 	
		 		 		 	Title:	 	
			
		 		 	Mosaic Acquisition Corp.
				
		 		 	By:	 	  

		 		 		 	Name:	 	
		 		 		 	Title:	 	

 [Signature Page to Investment Management Trust Agreement] 

 SCHEDULE A 
  

							
	 Fee Item
	  	 Time and method of payment
	  	Amount	 
	Initial acceptance fee	  	Initial closing of Offering by wire transfer.	  	$	2,000.00	 
			
	Annual fee	  	First year, initial closing of Offering by wire transfer, thereafter on the anniversary of the effective date of the Offering by wire transfer or check.	  	$	10,000.00	 
			
	Transaction processing fee for disbursements to Company under Sections 1(i), 1(k) and 1(j)	  	Deduction by Trustee from accumulated income following disbursement made to Company under Section 1	  	$	250.00	 
			
	Paying Agent services as required pursuant to Section 1(i)	  	Billed to Company upon delivery of service pursuant to Section 1(i)	  	 	Prevailing rates	 

 Sched. A-1 

 EXHIBIT A 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 17 Battery Place 
 New
York, New York 10004 
 Attn:
[                        ] 
  

	 	Re:	Trust Account No. [    ] Termination Letter 

 Gentlemen: 

Pursuant to Section 1(i) of the Investment Management Trust Agreement between Mosaic Acquisition Corp.
(“Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2017 (the “Trust Agreement”), this is to advise you that the Company
has entered into an agreement with [ ] (the “Target Business”) to consummate a business combination with Target Business (the “Business Combination”) on or about [insert date]. The Company shall
notify you at least forty-eight (48) hours in advance of the actual date of the consummation of the Business Combination (the “Consummation Date”). Capitalized terms used but not defined herein shall have the meanings
set forth in the Trust Agreement. 
 In accordance with the terms of the Trust Agreement, we hereby authorize you to commence to liquidate
all of the assets of the Trust Account on [insert date], and to transfer the proceeds to the above-referenced trust checking account at J.P. Morgan Chase Bank, N.A. to the effect that, on the Consummation Date, all of the funds held in the
Trust Account will be immediately available for transfer to the account or accounts that the Company and the Representatives (with respect to the Deferred Discount) shall direct on the Consummation Date. It is acknowledged and agreed that while the
funds are on deposit in the trust checking account at J.P. Morgan Chase Bank, N.A. awaiting distribution, neither the Company nor the Representatives will earn any interest or dividends. 

On the Consummation Date (i) counsel for the Company shall deliver to you written notification that the Business Combination has been
consummated, or will be consummated substantially concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”) and (ii) the Company shall deliver to you (a) [an affidavit]
[a certificate] of the Chief Executive Officer, which verifies that the Business Combination has been approved by a vote of the Company’s shareholders, if a vote is held and (b) joint written instruction signed by the Company and the
Representatives with respect to the transfer of the funds held in the Trust Account, including express instruction to pay the Deferred Discount from the Trust Account directly to the account or accounts directed by the Representatives (the
“Instruction Letter”). You are hereby directed and authorized to transfer the funds held in the Trust Account immediately upon your receipt of the Notification and the Instruction Letter, in accordance with the terms of the
Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by the Consummation Date without penalty, you will notify the Company in writing of the same and the Company shall direct you as to whether such
funds should remain 

  
 A-1 

 
in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses
related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated. 
 In the event that the Business
Combination is not consummated on the Consummation Date described in the notice thereof and we have not notified you on or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions
from the Company, the funds held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the business day immediately following the Consummation Date as set forth in such written
instruction as soon thereafter as possible. 
  

			
	Very truly yours,
	
	Mosaic Acquisition Corp.
		
	By:	 	  

		 	Name:
		 	Title:

  

	cc:	Deutsche Bank Securities Inc. 

	    	RBC Capital Markets, LLC 

	    	J.P. Morgan Securities LLC 

  
 A-2 

 EXHIBIT B 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 17 Battery Place 
 New
York, New York 10004 
 Attn:
[                        ] 
  

	 	Re:	Trust Account No. [    ] Termination Letter 

 Gentlemen: 

Pursuant to Section 1(i) of the Investment Management Trust Agreement between Mosaic Acquisition Corp.
(“Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2017 (the “Trust Agreement”), this is to advise you that the Company
has been unable to effect a business combination with a Target Business the time frame specified in the Company’s Amended and Restated Memorandum and Articles of Association, as described in the Company’s Prospectus relating to the
Offering. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement. 
 In accordance with the
terms of the Trust Agreement, we hereby authorize you to liquidate all of the assets in the Trust Account on                     , 20 , and to
transfer the total proceeds to the trust checking account at J.P. Morgan Chase Bank, N.A. to await distribution to the Public Shareholders. The Company has selected [●] as the record date for the purpose of determining the Public Shareholders
entitled to receive their share of the liquidation proceeds. You agree to be the Paying Agent of record and, in your separate capacity as Paying Agent, agree to distribute said funds directly to the Company’s Public Shareholders in accordance
with the terms of the Trust Agreement and the amended and restated memorandum and articles of association of the Company. Upon the distribution of all the funds, your obligations under the Trust Agreement shall be terminated, except to the extent
otherwise provided in Section 1(j) of the Trust Agreement. 
  

			
	Very truly yours,
	
	Mosaic Acquisition Corp.
		
	By:	 	  

		 	Name:
		 	Title:

  

	cc:	Deutsche Bank Securities Inc. 

	    	RBC Capital Markets, LLC 

	    	J.P. Morgan Securities LLC 

  
 B-1 

 EXHIBIT C 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 17 Battery Place 
 New
York, New York 10004 
 Attn:
[                        ] 
  

	 	Re:	Trust Account No. [    ] Tax Payment Withdrawal Instruction 

Gentlemen: 
 Pursuant to
Section 1(j) of the Investment Management Trust Agreement between Mosaic Acquisition Corp. (the “Company”) and Continental Stock Transfer & Trust Company (the
“Trustee”), dated as of [●], 2017 (the “Trust Agreement”), the Company hereby requests that you deliver to the Company $[●] of the interest income earned on the Property as of the date
hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement. 
 The Company needs such
funds to pay for the tax obligations as set forth on the attached tax return or tax statement. In accordance with the terms of the Trust Agreement, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your
receipt of this letter to the Company’s operating account at: 
 [WIRE INSTRUCTION INFORMATION] 

 

			
	Very truly yours,
	
	Mosaic Acquisition Corp.
		
	 By:
	 	  

		 	 Name:

		 	 Title:

  

	cc:	Deutsche Bank Securities Inc. 

	    	RBC Capital Markets, LLC 

	    	J.P. Morgan Securities LLC 

  
 C-1 

 EXHIBIT D 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 17 Battery Place 
 New
York, New York 10004 
 Attn:
[                        ] 
  

	 	Re:	Trust Account No. Shareholder Redemption Withdrawal Instruction 

 Gentlemen: 

Pursuant to Section 1(k) of the Investment Management Trust Agreement between Mosaic Acquisition Corp. (the
“Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2017 (the “Trust Agreement”), the Company hereby requests that you
deliver to the redeeming Public Shareholders of the Company $[●] of the principal and interest income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust
Agreement. 
 The Company needs such funds to pay its Public Shareholders who have properly elected to have their Ordinary Shares redeemed
by the Company in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association to modify the substance or timing of the Company’s obligation to redeem 100% of its
Ordinary Shares if the Company has not consummated an initial Business Combination within such time as is described in the Company’s amended and restated memorandum and articles of association. As such, you are hereby directed and authorized to
transfer (via wire transfer) such funds promptly upon your receipt of this letter to the redeeming Public Shareholders in accordance with your customary procedures. 

 

			
	Very truly yours,
	
	Mosaic Acquisition Corp.
		
	By:	 	  

		 	Name:
		 	Title:

  

	cc:	Deutsche Bank Securities Inc. 

	    	RBC Capital Markets, LLC 

	    	J.P. Morgan Securities LLC 

  
 D-1EX-10.5

 Exhibit 10.5 

Mosaic Acquisition Corp. 
 375 Park
Avenue 
 New York, NY 10152 
  

			
	 [SUBSCRIBER]
 [SUBSCRIBER’S ADDRESS]

[SUBSCRIBER’S ADDRESS]
	  	[•], 2017

 RE: Securities Subscription Agreement

Ladies and Gentlemen: 
 Mosaic Acquisition Corp., a Cayman
Islands exempted company (the “Company”), is pleased to accept the offer [SUBCRIBER], a Delaware limited liability company (the “Subscriber” or “you”) has made to purchase 4,312,500 of the
Company’s Class F ordinary shares (the “Shares”), $0.0001 par value per share (the “Class F Shares”), up to 562,500 of which are subject to complete or partial forfeiture by you if the underwriters of the
Company’s initial public offering (“IPO”) of units do not fully exercise their over-allotment option (the “Over-allotment Option”). For the purposes of this Agreement, references to “Ordinary
Shares” are to, collectively, the Class F Shares and the Company’s Class A ordinary shares, $0.0001 par value per share (the “Class A Shares”). Pursuant to the Company’s memorandum and articles of
association, as amended to the date hereof (the “Articles”), Class F Shares will convert into Class A Shares on a one-for-one basis, subject to adjustment, upon the terms and conditions set forth in the Articles. Unless the
context otherwise requires, as used herein “Shares” shall be deemed to include any Class A Shares issued upon conversion of the Class F Shares comprising the Shares. The terms (this “Agreement”) on which the Company
is willing to sell the Shares to the Subscriber, and the Company and the Subscriber’s agreements regarding such Shares, are as follows: 
 1.
Purchase of Shares. 
 For the sum of $12,500 (the “Purchase Price”), which the Company acknowledges receiving in cash, the Company
hereby sells and issues the Shares to the Subscriber, and the Subscriber hereby purchases the Shares from the Company, subject to forfeiture, on the terms and subject to the conditions set forth in this Agreement. Concurrently with the
Subscriber’s execution of this Agreement, the Company shall, at its option, deliver to the Subscriber a certificate registered in the Subscriber’s name representing the Shares (the “Original Certificate”) or effect such
delivery in book-entry form. All references in this Agreement to shares of the Company being forfeited shall take effect as surrenders for no consideration of such shares as a matter of Cayman Islands law. 

2. Representations, Warranties and Agreements. 
 2.1
Subscriber’s Representations, Warranties and Agreements. To induce the Company to issue the Shares to the Subscriber, the Subscriber hereby represents and warrants to the Company and agrees with the Company as follows: 

2.1.1 No Government Recommendation or Approval. The Subscriber understands that no federal or state agency has passed upon or made any recommendation or
endorsement of the offering of the Shares. 
 2.1.2 No Conflicts. The execution, delivery and performance of this Agreement and the consummation by
the Subscriber of the transactions contemplated hereby do not violate, conflict with or constitute a default under (i) the formation and governing documents of the Subscriber, (ii) any agreement, indenture or instrument to which the
Subscriber is a party or (iii) any law, statute, rule or regulation to which the Subscriber is subject, or any agreement, order, judgment or decree to which the Subscriber is subject. 

2.1.3 Organization and Authority. The Subscriber is a Delaware limited liability company, validly existing and in good standing under the laws of the
Delaware and possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement. Upon execution and delivery by you, this Agreement is a legal, valid and binding agreement of Subscriber, enforceable
against Subscriber in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, fraudulent conveyance or similar laws affecting the enforcement of creditors’ rights generally and subject to
general principles of equity (regardless of whether enforcement is sought in a proceeding at law or in equity). 
 2.1.4 Experience, Financial Capability
and Suitability. Subscriber is: (i) sophisticated in financial matters and is able to evaluate the risks and benefits of the investment in the Shares and (ii) able to bear the economic risk of its investment in the Shares for an
indefinite period of time because the Shares have not been registered under the Securities Act (as defined below) and therefore cannot be sold unless subsequently registered under the Securities Act or an exemption from such registration is
available. Subscriber is capable of evaluating the merits and risks of its investment in the Company and has the capacity to protect its own interests. Subscriber must bear the economic risk of this investment until the Shares are sold pursuant to:
(i) an effective registration statement under the Securities Act or (ii) an exemption from registration available with respect to such sale. Subscriber is able to bear the economic risks of an investment in the Shares and to afford a
complete loss of Subscriber’s investment in the Shares. 
 2.1.5 Access to Information; Independent Investigation. Prior to the execution of this
Agreement, the Subscriber has had the opportunity to ask questions of and receive answers from representatives of the Company concerning an investment in the Company, as well as the finances, operations, business and prospects of the Company, and
the opportunity to obtain additional information to verify the accuracy of all information so obtained. In determining whether to make this investment, Subscriber has relied solely on Subscriber’s own knowledge and understanding of the Company
and its business based upon Subscriber’s own due diligence investigation and the information furnished pursuant to this paragraph. Subscriber understands that no person has been authorized to give any information or to make any representations
which were not furnished pursuant to this Section 2 and Subscriber has not relied on any other representations or information in making its investment decision, whether written or oral, relating to the Company, its operations and/or its
prospects. 

 2.1.6 Regulation D Offering. Subscriber represents that it is an “accredited investor” as such
term is defined in Rule 501(a) of Regulation D under the Securities Act of 1933, as amended (the “Securities Act”) and acknowledges the sale contemplated hereby is being made in reliance on a private placement exemption to
“accredited investors” within the meaning of Section 501(a) of Regulation D under the Securities Act or similar exemptions under state law. 

2.1.7 Investment Purposes. The Subscriber is purchasing the Shares solely for investment purposes, for the Subscriber’s own account and not for the
account or benefit of any other person, and not with a view towards the distribution or dissemination thereof. The Subscriber did not decide to enter into this Agreement as a result of any general solicitation or general advertising within the
meaning of Rule 502 under the Securities Act. 
 2.1.8 Restrictions on Transfer; Shell Company. Subscriber understands the Shares are being offered in
a transaction not involving a public offering within the meaning of the Securities Act. Subscriber understands the Shares will be “restricted securities” within the meaning of Rule 144(a)(3) under the Securities Act and Subscriber
understands that the certificates or book-entries representing the Shares will contain a legend in respect of such restrictions. If in the future the Subscriber decides to offer, resell, pledge or otherwise transfer the Shares, such Shares may be
offered, resold, pledged or otherwise transferred only pursuant to: (i) registration under the Securities Act, or (ii) an available exemption from registration. Subscriber agrees that if any transfer of its Shares or any interest therein
is proposed to be made, as a condition precedent to any such transfer, Subscriber may be required to deliver to the Company an opinion of counsel satisfactory to the Company. Absent registration or an exemption, the Subscriber agrees not to resell
the Shares. Subscriber further acknowledges that because the Company is a shell company, Rule 144 may not be available to the Subscriber for the resale of the Shares until one year following consummation of the initial business combination of the
Company, despite technical compliance with the requirements of Rule 144 and the release or waiver of any contractual transfer restrictions. 
 2.1.9 No
Governmental Consents. No governmental, administrative or other third party consents or approvals are required, necessary or appropriate on the part of Subscriber in connection with the transactions contemplated by this Agreement. 

2.2 Company’s Representations, Warranties and Agreements. To induce the Subscriber to purchase the Shares, the Company hereby represents and
warrants to the Subscriber and agrees with the Subscriber as follows: 
 2.2.1 Organization and Corporate Power. The Company is a Cayman Islands
exempted company and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating results or assets of the Company. The
Company possesses all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement. 
 2.2.2 No
Conflicts. The execution, delivery and performance of this Agreement and the consummation by the Company of the transactions contemplated hereby do not violate, conflict with or constitute a default under (i) the Memorandum and Articles of
Association of the Company, (ii) any agreement, indenture or instrument to which the Company is a party or (iii) any law, statute, rule or regulation to which the Company is subject, or any agreement, order, judgment or decree to which the
Company is subject. 
 2.2.3 Title to Shares. Upon issuance in accordance with, and payment pursuant to, the terms hereof, and registration on the
register of members of the Company, the Shares will be duly and validly issued, fully paid and nonassessable. Upon issuance in accordance with, and payment pursuant to, the terms hereof the Subscriber will have or receive good title to the Shares,
free and clear of all liens, claims and encumbrances of any kind, other than (a) transfer restrictions hereunder and under the other agreements to which the Shares may be subject, (b) transfer restrictions under federal and state
securities laws, and (c) liens, claims or encumbrances imposed due to the actions of the Subscriber. 
 2.2.4 No Adverse Actions. There are no
actions, suits, investigations or proceedings pending, threatened against or affecting the Company which: (i) seek to restrain, enjoin, prevent the consummation of or otherwise affect the transactions contemplated by this Agreement or
(ii) question the validity or legality of any transactions or seeks to recover damages or to obtain other relief in connection with any transactions. 

2.2.5 Authorization. The Class A Shares issuable upon conversion of the Class F Shares have been duly authorized and reserved for issuance upon
such conversion. 
 3. Forfeiture of Shares. 
 3.1
Partial or No Exercise of the Over-allotment Option. In the event the Over-allotment Option granted to the underwriters of the IPO is not exercised in full, the Subscriber acknowledges and agrees that it (and, if applicable, any transferee of
Shares) shall forfeit any and all rights to such number of Shares (up to an aggregate of 562,500 Shares and pro rata based upon the percentage of the Over-allotment Option exercised) such that immediately following such forfeiture, the Subscriber
(and any such transferees) will own an aggregate number of Shares (not including Class A Shares issuable upon exercise of any warrants or any securities purchased by Subscriber in the IPO or in the aftermarket) equal to 10% of the issued and
outstanding Ordinary Shares immediately following the IPO. 
 3.2 Termination of Rights as Shareholder. If any of the Shares are forfeited in
accordance with this Section 3, then after such time the Subscriber (or successor in interest), shall no longer have any rights as a holder of such forfeited Shares, and the Company shall take such action as is appropriate to cancel such
forfeited Shares. 
 3.3 Share Certificates. In the event an adjustment to the Original Certificate, if any, is required pursuant to this
Section 3, then the Subscriber shall return such Original Certificate to the Company or its designated agent as soon as practicable upon its receipt of notice from the Company advising Subscriber of such adjustment, following which a new
certificate (the “New Certificate”), if any, shall be issued in such amount representing the adjusted number of Shares held by the Subscriber. The New Certificate, if any, shall be returned to the Subscriber as soon as practicable.
Any such adjustment for any uncertificated securities held by the Subscriber shall be made in book-entry form. 
 4. Waiver of Liquidation Distributions;
Redemption Rights. In connection with the Shares purchased pursuant to this Agreement, the Subscriber hereby waives any and all right, title, interest or claim of any kind in or to any distributions by the Company from the trust account which
will be established for the benefit of the Company’s public shareholders and into which substantially all of the proceeds of the IPO will be deposited (the “Trust Account”), in the event of a liquidation of the Company upon the
Company’s failure to timely complete an initial business combination. For purposes of clarity, in the event the Subscriber purchases securities in the IPO or in the aftermarket, any Class A Shares so purchased shall be eligible to receive
any liquidating distributions by the Company. However, in no event will the Subscriber have the right to redeem any Ordinary Shares held by it into funds held in the Trust Account upon the successful completion of an initial business combination.

 5. Restrictions on Transfer. 

5.1 Securities Law Restrictions. In addition to any restrictions to be contained in that certain letter agreement (commonly known as an “Insider
Letter”) to be dated on or prior to the closing of the IPO by and between Subscriber and the Company, Subscriber agrees not to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Shares unless, prior thereto
(a) a registration statement on the appropriate form under the Securities Act and applicable state securities laws with respect to the Shares proposed to be transferred shall then be effective or (b) the Company has received an opinion
from counsel reasonably satisfactory to the Company, that such registration is not required because such transaction is exempt from registration under the Securities Act and the rules promulgated by the Securities and Exchange Commission thereunder
and with all applicable state securities laws. 
 5.2 Lock-up. Subscriber acknowledges that the Shares will be subject to lock-up provisions (the
“Lock-up”) contained in the Insider Letter. 
 5.3 Restrictive Legends. All certificates representing the Shares shall have endorsed
thereon legends substantially as follows: 
 “THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES LAWS AND NEITHER THE SECURITIES NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR SUCH LAWS OR AN
EXEMPTION FROM REGISTRATION UNDER SUCH ACT AND SUCH LAWS WHICH, IN THE OPINION OF COUNSEL, IS AVAILABLE.” 
 “THE SECURITIES REPRESENTED BY
THIS CERTIFICATE ARE SUBJECT TO A LOCKUP AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED DURING THE TERM OF THE LOCKUP.” 

5.4 Additional Shares or Substituted Securities. In the event of the declaration of a share dividend, the declaration of an extraordinary dividend
payable in a form other than shares, a spin-off, a share split, an adjustment in conversion ratio, a recapitalization or a similar transaction affecting the Company’s outstanding Ordinary Shares without receipt of consideration, any new,
substituted or additional securities or other property which are by reason of such transaction distributed with respect to any Shares subject to this Section 5 or into which such Shares thereby become convertible shall immediately be subject to
this Section 5 and Section 3. Appropriate adjustments to reflect the distribution of such securities or property shall be made to the number and/or class of Shares subject to this Section 5 and Section 3. 

5.5 Registration Rights. Subscriber acknowledges that the Shares are being purchased pursuant to an exemption from the registration requirements of the
Securities Act and will become freely tradable only after certain conditions are met or they are registered pursuant to a registration rights agreement to be entered into with the Company prior to the closing of the IPO (the “Registration
Rights Agreement”). 
 6. Other Agreements. 
 6.1
Further Assurances. Subscriber agrees to execute such further instruments and to take such further action as may reasonably be necessary to carry out the intent of this Agreement. 

6.2 Notices. All notices, statements or other documents which are required or contemplated by this Agreement shall be in writing and delivered
(i) personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in writing, (ii) by facsimile to the number most recently provided to such
party or such other address or fax number as may be designated in writing by such party or (iii) by electronic mail, to the electronic mail address most recently provided to such party or such other electronic mail address as may be designated
in writing by such party. Any notice or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the day of receipt of written confirmation, if sent by facsimile or electronic
transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent by mail. 
 6.3 Entire
Agreement. This Agreement, the Insider Letter and the Registration Rights Agreement each, substantially in the form to be filed as an exhibit to the Registration Statement, embodies the entire agreement and understanding between the Subscriber
and the Company with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating to the subject matter hereof. No statement, representation, warranty, covenant or agreement of any kind not
expressly set forth in this Agreement shall affect, or be used to interpret, change or restrict, the express terms and provisions of this Agreement. 
 6.4
Modifications and Amendments. The terms and provisions of this Agreement may be modified or amended only by written agreement executed by all parties hereto. 

6.5 Waivers and Consents. The terms and provisions of this Agreement may be waived, or consent for the departure therefrom granted, only by written
document executed by the party entitled to the benefits of such terms or provisions. No such waiver or consent shall be deemed to be or shall constitute a waiver or consent with respect to any other terms or provisions of this Agreement, whether or
not similar. Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was given, and shall not constitute a continuing waiver or consent. 

6.6 Assignment. The rights and obligations under this Agreement may not be assigned by either party hereto without the prior written consent of the
other party. 
 6.7 Benefit. All statements, representations, warranties, covenants and agreements in this Agreement shall be binding on the parties
hereto and shall inure to the benefit of the respective successors and permitted assigns of each party hereto. Nothing in this Agreement shall be construed to create any rights or obligations except among the parties hereto, and no person or entity
shall be regarded as a third-party beneficiary of this Agreement. 
 6.8 Governing Law. This Agreement and the rights and obligations of the parties
hereunder shall be construed in accordance with and governed by the laws of New York applicable to contracts wholly performed within the borders of such state, without giving effect to the conflict of law principles thereof. 

6.9 Severability. In the event that any court of competent jurisdiction shall determine that any provision, or any portion thereof, contained in this
Agreement shall be unreasonable or unenforceable in any respect, then such provision shall be deemed limited to the extent that such court deems it reasonable and enforceable, and as so limited shall remain in full force and effect. In the event
that such court shall deem any such provision, or portion thereof, wholly unenforceable, the remaining provisions of this Agreement shall nevertheless remain in full force and effect. 

 6.10 No Waiver of Rights, Powers and Remedies. No failure or delay by a party hereto in exercising any
right, power or remedy under this Agreement, and no course of dealing between the parties hereto, shall operate as a waiver of any such right, power or remedy of such party. No single or partial exercise of any right, power or remedy under this
Agreement by a party hereto, nor any abandonment or discontinuance of steps to enforce any such right, power or remedy, shall preclude such party from any other or further exercise thereof or the exercise of any other right, power or remedy
hereunder. The election of any remedy by a party hereto shall not constitute a waiver of the right of such party to pursue other available remedies. No notice to or demand on a party not expressly required under this Agreement shall entitle the
party receiving such notice or demand to any other or further notice or demand in similar or other circumstances or constitute a waiver of the rights of the party giving such notice or demand to any other or further action in any circumstances
without such notice or demand. 
 6.11 Survival of Representations and Warranties. All representations and warranties made by the parties hereto in
this Agreement or in any other agreement, certificate or instrument provided for or contemplated hereby, shall survive the execution and delivery hereof and any investigations made by or on behalf of the parties. 

6.12 No Broker or Finder. Each of the parties hereto represents and warrants to the other that no broker, finder or other financial consultant has acted
on its behalf in connection with this Agreement or the transactions contemplated hereby in such a way as to create any liability on the other. Each of the parties hereto agrees to indemnify and save the other harmless from any claim or demand for
commission or other compensation by any broker, finder, financial consultant or similar agent claiming to have been employed by or on behalf of such party and to bear the cost of legal expenses incurred in defending against any such claim. 

6.13 Headings and Captions. The headings and captions of the various subdivisions of this Agreement are for convenience of reference only and shall in
no way modify or affect the meaning or construction of any of the terms or provisions hereof. 
 6.14 Counterparts. This Agreement may be executed in
one or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both
parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission or any other form of electronic delivery, such signature shall create a valid and binding obligation of the party executing (or on
whose behalf such signature is executed) with the same force and effect as if such signature page were an original thereof. 
 6.15 Construction. The
parties hereto have participated jointly in the negotiation and drafting of this Agreement. If an ambiguity or question of intent or interpretation arises, this Agreement will be construed as if drafted jointly by the parties hereto and no
presumption or burden of proof will arise favoring or disfavoring any party hereto because of the authorship of any provision of this Agreement. The words “include,” “includes,” and “including” will
be deemed to be followed by “without limitation.” Pronouns in masculine, feminine, and neuter genders will be construed to include any other gender, and words in the singular form will be construed to include the plural and vice
versa, unless the context otherwise requires. The words “this Agreement,” “herein,” “hereof,” “hereby,” “hereunder,” and words of similar import refer to this
Agreement as a whole and not to any particular subdivision unless expressly so limited. The parties hereto intend that each representation, warranty, and covenant contained herein will have independent significance. If any party hereto has breached
any representation, warranty, or covenant contained herein in any respect, the fact that there exists another representation, warranty or covenant relating to the same subject matter (regardless of the relative levels of specificity) which such
party hereto has not breached will not detract from or mitigate the fact that such party hereto is in breach of the first representation, warranty, or covenant. 

7. Voting and Tender of Shares. Subscriber agrees to vote the Shares in favor of an initial business combination that the Company negotiates and
submits for approval to the Company’s shareholders and shall not seek redemption with respect to such Shares. Additionally, the Subscriber agrees not to tender any Shares in connection with a tender offer presented to the Company’s
shareholders in connection with an initial business combination negotiated by the Company. 
 8. Indemnification. Each party shall indemnify the
other against any loss, cost or damages (including reasonable attorney’s fees and expenses) incurred as a result of such party’s breach of any representation, warranty, covenant or agreement in this Agreement. 

[Signature Page Follows] 

 If the foregoing accurately sets forth our understanding and agreement, please sign the enclosed copy of the
Agreement and return it to us. 
  

			
	Very truly yours,
	
	MOSAIC ACQUISITION CORP.

 
			
		
	By:	 	 /s/

	Name:	 	
	Title:	 	

 Accepted and agreed this              day of
            , 2017 
  

			
	
	[SUBSCRIBER]

			
		
	By:	 	 /s/

	Name:	 	
	Title:	 	

 [Signature page to Subscription Agreement]

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