Document:

EX-10.22

 Exhibit 10.22 

September 15, 2019 
 Mosaic Acquisition
Corp. 
 375 Park Avenue 
 New York, NY 10152 

Re:    Sponsor Agreement 

Ladies and Gentlemen: 
 This letter (this “Sponsor
Agreement”) is being delivered to you in accordance with that Agreement and Plan of Merger, dated as of the date hereof, by and among Mosaic Acquisition Corp., a Delaware corporation (the “Acquiror”), Vivint
Smart Home, Inc., a Delaware corporation (the “Company”), and the other parties thereto (the “Merger Agreement”) and hereby amends and restates in its entirety with respect to the Sponsors (as defined
below) that certain letter, dated October 18, 2017, from, inter alia, Eugene I. Davis, Mosaic Sponsor, LLC, a Delaware limited liability company (“Mosaic Sponsor”), and Fortress Mosaic Sponsor LLC, a Delaware limited
liability company (“Fortress Sponsor” and, together with Eugene I. Davis and Mosaic Sponsor, each a “Sponsor” and collectively, the “Sponsors”) to the Acquiror (the
“Prior Letter Agreement”). Certain capitalized terms used herein are defined in paragraph 8 hereof. Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the
Merger Agreement. 
 The Sponsors are currently, and as of the Closing will be, the record owners of all of the outstanding Founder Shares and outstanding
Private Placement Warrants, with each Sponsor’s ownership as of the date hereof detailed on Schedule A hereto (the Founder Shares owned by such Sponsor, together with any additional shares of Common Stock or Founder Shares (or any securities
convertible into or exercisable or exchangeable for Common Stock or Founder Shares) in which such Sponsor acquires record or beneficial ownership after the date hereof, including by purchase, as a result of a stock dividend, stock split,
recapitalization, combination, reclassification, exchange or change of such shares, or upon exercise or conversion of any securities, the “Covered Shares”). 

In order to induce the Company and Acquiror to enter into the Merger Agreement and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, each Sponsor hereby agrees with the Acquiror and, at all times prior to any valid termination of the Merger Agreement, the Company as follows: 

1.    Prior to the valid termination of the Merger Agreement, each Sponsor, in its capacity as a stockholder of Acquiror, agrees
irrevocably and unconditionally agrees that, at the Special Meeting, at any other meeting of the stockholders of Acquiror (whether annual or special and whether or not an adjourned or postponed meeting, however called and including any adjournment
or postponement thereof) and in connection with any written consent of stockholders of Acquiror (the date of the taking of any such action being an applicable “Determination Date”), the Sponsor shall, and shall cause any
other holder of record of any of the Sponsor’s Covered Shares to: 
  

	 	a.	 when such meeting is held, appear at such meeting or otherwise cause the Sponsor’s Covered Shares to be
counted as present thereat for the purpose of establishing a quorum; 

  

	 	b.	 vote (or execute and return an action by written consent), or cause to be voted at such meeting (or validly
execute and return and cause such consent to be granted with respect to), all of the Sponsor’s Covered Shares owned as of the record date for such meeting (or the date that any written consent is executed by the Sponsor) in favor of each
Proposal and any other matters necessary or reasonably requested by the Company for consummation of the Merger and the other transactions contemplated by the Merger Agreement; and 

	 	c.	 vote (or execute and return an action by written consent), or cause to be voted at such meeting, or validly
execute and return and cause such consent to be granted with respect to, all of the Sponsor’s Covered Shares against any Acquiror Business Combination Proposal (as defined below) and any other action that would reasonably be expected to
materially impede, interfere with, delay, postpone or adversely affect the Merger or any of the other transactions contemplated by the Merger Agreement or result in a breach of any covenant, representation or warranty or other obligation or
agreement of Acquiror under the Merger Agreement or result in a breach of any covenant, representation or warranty or other obligation or agreement of the Sponsor contained in this Sponsor Agreement. 

The obligations of the Sponsor specified in this paragraph 1 shall apply whether or not the Merger or any action described above is recommended by the
Acquiror Board or the Acquiror Board has effected an Acquiror Change in Recommendation. 
 2.    Prior to the valid termination of the
Merger Agreement, each Sponsor shall not, and each Sponsor shall instruct and use its reasonable best efforts to cause its Representatives not to, directly or indirectly, (i) solicit, initiate or knowingly encourage or knowingly facilitate any
inquiry, proposal or offer which constitutes, or could reasonably be expected to lead to, a Business Combination Proposal other than with the Company, its shareholders and their respective Affiliates and Representatives, in each case, in their
capacity as such (such Business Combination Proposal, a “Acquiror Business Combination Proposal”), (ii) participate in any discussions or negotiations regarding, or furnish to any Person (other than Merger Sub, the Company, the
Company’s Affiliates and their respective Representatives) any nonpublic information relating to Acquiror and its Subsidiaries, in connection with any Acquiror Business Combination Proposal, (iii) approve or recommend, or make any public
statement approving or recommending, a Acquiror Business Combination Proposal, (iv) enter into any letter of intent, merger agreement or other similar agreement providing for a Acquiror Business Combination Proposal, (v) make, or in any
manner participate in a “solicitation” (as such term is used in the rules of the SEC) of proxies or powers of attorney or similar rights to vote, or seek to advise or influence any Person with respect to the voting of Common Stock or
Founder Shares intending to facilitate any Acquiror Business Combination Proposal or cause any holder of shares of Common Stock or Founder Shares not to vote to adopt the Merger Agreement and approve the Merger or any of the other transactions
contemplated thereby, (vi) become a member of a “group” (as such term is used in Section 13(d) of the Exchange Act) with respect to any voting securities of Acquiror that takes any action in support of a Acquiror Business
Combination Proposal or (vii) otherwise resolve or agree to do any of the foregoing. A Sponsor shall promptly (and in any event within 48 hours) notify the Company after receipt by such Sponsor of any Acquiror Business Combination Proposal, any
inquiry or proposal that would reasonably be expected to lead to a Acquiror Business Combination Proposal or any inquiry or request for nonpublic information relating to Acquiror and its Subsidiaries by any Person who has made or would reasonably be
expected to make a Acquiror Business Combination Proposal and provide to the Company copies of all material correspondence and written materials sent or provided to such Sponsor (or, if applicable, any of its Subsidiaries) relating to such Acquiror
Business Combination Proposal or such inquiry or proposal. Such notice shall indicate the identity of the Person making the proposal or offer, the material terms and conditions of any such proposal or offer and any related financing and, if
applicable, the nature of the information requested pursuant to such inquiry or request. Thereafter, such Sponsor shall keep the Company reasonably informed, on a prompt basis (and in any event within 48 hours), regarding any material changes to the
status and material terms of any such proposal or offer (including any material amendments thereto or any material change to the scope or material terms or conditions thereof), and provide to the Company copies of all material correspondence and
written materials sent or provided to such Sponsor (or, if applicable, any of its Subsidiaries relating to such proposal or offer). Each Sponsor agrees that, following the date hereof, it and its Representatives shall cease and cause to be
terminated any existing activities, solicitations, discussions or negotiations by such Sponsor or its Representatives with any parties conducted heretofore with respect to any Acquiror Business Combination Proposal. Notwithstanding anything in this
Sponsor Agreement to the contrary, (i) each Sponsor shall not be responsible for the actions of Acquiror or its Board of Directors (or any committee thereof), any Subsidiary of Acquiror, or any officers, directors (in their capacity as such),
employees and professional advisors of any of the foregoing (the “Acquiror Related Parties”), including with respect to any of the matters contemplated by this paragraph 2, (ii) each Sponsor makes no representations or

  
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warranties with respect to the actions of any of the Acquiror Related Parties, and (iii) any breach by Acquiror of its obligations under Section 7.12 of the Merger Agreement shall not
be considered a breach of this paragraph 2 (it being understood for the avoidance of doubt that each Sponsor shall remain responsible for any breach by it or its Representatives (other than any such Representative that is a Acquiror Related Party)
of this paragraph 2). In furtherance of this Sponsor Agreement, each Sponsor hereby authorizes and will instruct Acquiror, promptly after the date hereof, to enter, or cause its transfer agent to enter, a stop transfer order with respect to all of
such Sponsor’s Covered Shares with respect to any Transfer not permitted hereunder and to include the following legend on any share certificates for such Sponsor’s Covered Shares: “THE SHARES OF STOCK REPRESENTED BY THIS CERTIFICATE
ARE SUBJECT TO CERTAIN VOTING AND TRANSFER RESTRICTIONS PURSUANT TO THAT CERTAIN SPONSOR AGREEMENT, DATED AS OF SEPTEMBER 15, 2019, BY AND AMONG MOSAIC ACQUISITION CORP., A DELAWARE CORPORATION, VIVINT SMART HOME, INC., A DELAWARE CORPORATION,
MOSAIC SPONSOR, LLC, FORTRESS MOSAIC SPONSOR LLC AND EUGENE I. DAVIS. ANY TRANSFER OF SUCH SHARES OF STOCK IN VIOLATION OF THE TERMS AND PROVISIONS OF SUCH SPONSOR AGREEMENT SHALL BE NULL AND VOID AND HAVE NO FORCE OR EFFECT WHATSOEVER.” The
delivery of such securities by the delivering party shall not in any way affect such party’s rights with respect to such securities. Each Sponsor hereby authorizes Acquiror to maintain a copy of this Sponsor Agreement at either the executive
office or the registered office of Acquiror. Prior to any valid termination of the Merger Agreement, each Sponsor shall use reasonable best efforts to take, or cause to be taken, all actions and to do, or cause to be done, all things reasonably
necessary to consummate the Merger and the other transactions contemplated by the Merger Agreement on the terms and subject to the conditions set forth therein and shall not take any action that would reasonably be expected to materially delay or
prevent the satisfaction of any of the conditions to the Merger set forth in Article IX of the Merger Agreement. In connection therewith, each Sponsor hereby irrevocably and unconditionally (but subject to the consummation of the Merger) (x)
agrees that pursuant to Section 5.3(b)(i)(A) of the Certificate of Incorporation the Founder Shares held by it shall convert into Common Stock at the Initial Conversion Ratio (as adjusted pursuant to Section 5.3(b)(ii)(y) of the
Certificate of Incorporation; it is acknowledged and agreed for purposes of the adjustment under Section 5.3(b)(ii)(y) of the Certificate of Incorporation that any shares of Common Stock issued pursuant to the exercise of, or otherwise in
accordance with, a right of first offer under a forward purchase agreement shall not constitute shares of Common Stock “issued pursuant to a forward purchase agreement”) immediately prior to the consummation of the Merger (and, for
purposes of this Sponsor Agreement, the shares of Common Stock issued upon such conversion shall be deemed to be “Founder Shares”) and (y) waives any adjustment to the Initial Conversion Ratio to which it would otherwise be entitled
pursuant to Section 5.3(b)(ii)(x) of the Certificate of Incorporation. Each Sponsor further agrees not to redeem any Shares owned by it in the Offer and not to commence or participate in, and to take all actions necessary to opt out of any
class in any class action with respect to, any claim, derivative or otherwise, against Acquiror, the Company, any affiliate or designee of a Sponsor acting in his or her capacity as director or any of their respective successors and assigns relating
to the negotiation, execution or delivery of this Sponsor Agreement, the Merger Agreement or the consummation of the transactions contemplated hereby and thereby. 

3.    Each Sponsor hereby agrees and acknowledges that (i) the underwriters of the Acquiror’s Public Offering, the Acquiror and,
prior to any valid termination of the Merger Agreement, the Company would be irreparably injured in the event of a breach by such Sponsor of its obligations under paragraphs 1, 4 and 5 of this Sponsor Agreement (with respect to such underwriters,
only such provisions as were contained in the Prior Letter Agreement), (ii) monetary damages may not be an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive
relief, in addition to any other remedy that such party may have in law or in equity, in the event of such breach. Notwithstanding the foregoing, or anything herein to the contrary, under no circumstances shall the Acquiror or the Sponsors be liable
for any costs or damages including, without limitation, any special, incidental, consequential, exemplary or punitive damages, to any Person, including the Company, in respect of this Sponsor Agreement, including any breach hereof, and the Company
hereby waives any claim it may have now or in the future for monetary costs or damages against the Acquiror or the Sponsors in respect of this Sponsor Agreement, including any breach hereof. 

  
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 4.    Subject to the Stockholders Agreement, (a) each Sponsor agrees that it shall
not Transfer any Founder Shares (or shares of Acquiror’s Class A common stock, par value $0.0001 per share (the “Common Stock”) issuable upon conversion thereof) or any Private Placement Warrants (or shares of
Common Stock issuable upon the exercise thereof) until the earlier of (A) one year after the completion of the Acquiror’s initial Business Combination, (B) subsequent to the initial Business Combination, if the last sale price of the
Common Stock equals or exceeds $12.00 per share (as adjusted for share splits, share dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period
commencing at least 150 days after the Acquiror’s initial Business Combination or (C) the date following the completion of the Acquiror’s initial Business Combination on which the Acquiror completes a liquidation, merger, share
exchange, reorganization or other similar transaction that results in all of the Acquiror’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other property (the “Lock-up Period”). 
 (b) Notwithstanding the provisions set forth in paragraph 4(a),
Transfers of the Founder Shares, Private Placement Warrants and shares of Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants or the Founder Shares that are held by any Sponsor or any of their permitted
transferees (that have complied with this paragraph 4(b)), are permitted (A) to the Acquiror’s officers or directors, any affiliates or family members of any of the Acquiror’s officers or directors, any members of any Sponsor, or any
affiliates of any Sponsor, which, for the avoidance of doubt, in the case of the Fortress Sponsor will include affiliates of funds managed by Fortress Investment Group LLC or its affiliates; (B) in the case of an individual, transfers by gift
to a member of the individual’s immediate family, to a trust, the beneficiary of which is a member of the individual’s immediate family or an affiliate of such person, or to a charitable organization; (C) in the case of an individual,
transfers by virtue of laws of descent and distribution upon death of the individual; (D) in the case of an individual, transfers pursuant to a qualified domestic relations order; (E) transfers made as part of the consummation of a
Business Combination (excluding the Merger and the Transactions) (including the entry into an agreement for such transfer); (F) transfers by virtue of the laws of the State of Delaware or any Sponsor’s limited liability company agreement upon
dissolution of such Sponsor; and (G) in the event of the Acquiror’s completion of a liquidation, merger, share exchange, reorganization or other similar transaction which results in all of the Acquiror’s stockholders having the right
to exchange their shares of Common Stock for cash, securities or other property subsequent to the completion of the Acquiror’s initial Business Combination (including the entry into an agreement in connection with such liquidation, merger,
share exchange, reorganization or other similar transaction)); provided, however, that in the case of clauses (A) through (D), these permitted transferees must enter into a written agreement agreeing to be bound by the
restrictions herein. 
 (c) Vesting Provisions. Each of the Sponsors agrees that, as of immediately prior to (but subject to) the
Closing, all of (i) the Founder Shares and (ii) the Private Placement Warrants, in each case, held by such Sponsor as of the Closing shall be unvested and shall be subject to the vesting and forfeiture provisions set forth in this
paragraph 4(c). Each of the Sponsors agrees that it shall not (and will cause its Affiliates not to) Transfer any unvested Founder Shares or any unvested Private Placement Warrants held by such Sponsor prior to the date such Founder Shares or
Private Placement Warrants become vested pursuant to this paragraph 4(c), except to the extent permitted by paragraph 4(b). 
  

	 	1.	 Vesting of Founder Shares. 

 

	 	I.	 Vesting of Shares at Closing. 50% of the unvested Founder Shares Beneficially Owned by each Sponsor (or
Affiliate thereof) as of the Closing shall vest at Closing. 

  

	 	II.	 Performance Vesting Shares. 

 

	 	A.	 25% of the unvested Founder Shares Beneficially Owned by each Sponsor (or Affiliate thereof) as of the Closing
shall vest at such time as a $12.50 Stock Price Level is achieved on or before the fifth 

  
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anniversary of the Closing Date. For the avoidance of doubt, if a $12.50 Stock Price Level is not achieved on or prior to the fifth anniversary of the Closing Date, the Founder Shares that were
eligible to vest pursuant to this paragraph 4(c)(1)(II)(A) shall not vest and shall be forfeited as provided in paragraph 4(c)(3). 

  

	 	B.	 25% of the unvested Founder Shares Beneficially Owned by each Sponsor (or Affiliate thereof) as of the Closing
shall vest at such time as a $15.00 Stock Price Level is achieved on or before the fifth anniversary of the Closing Date. For the avoidance of doubt, if a $15.00 Stock Price Level is not achieved on or prior to the fifth anniversary of the Closing
Date, the Founder Shares that were eligible to vest pursuant to this paragraph 4(c)(1)(II)(B) shall not vest and shall be forfeited as provided in paragraph 4(c)(3). 
	 

  

	 	2.    Vesting	 of Private Placement Warrants 

 

	 	I.	 Performance Vesting Warrants. 

 

	 	A.	 50% of the Private Placement Warrants Beneficially Owned by each Sponsor (or any Affiliate thereof) as of the
Closing shall vest at such time as a $12.50 Stock Price Level is achieved on or before the fifth anniversary of the Closing Date. For the avoidance of doubt, if a $12.50 Stock Price Level is not achieved on or prior to the fifth anniversary of the
Closing Date, the Private Placement Warrants that were eligible to vest pursuant to this paragraph 4(c)(2)(I)(A) shall not vest and shall be forfeited as provided in paragraph 4(c)(3). 

 

	 	B.	 50% of the Private Placement Warrants Beneficially Owned by each Sponsor (or any Affiliate thereof) as of the
Closing shall vest at such time as a $15.00 Stock Price Level is achieved on or before the fifth anniversary of the Closing Date. For the avoidance of doubt, if a $15.00 Stock Price Level is not achieved on or prior to the fifth anniversary of the
Closing Date, the Private Placement Warrants that were eligible to vest pursuant to this paragraph 4(c)(2)(I)(B) shall not vest and shall be forfeited as provided in paragraph 4(c)(3). 

 

	 	3.    Forfeiture	 of Unvested Founder Shares and Private Placement Warrants. 

 

	 	I.	 Unvested Founder Shares that are forfeited pursuant to paragraph 4(c)(1)(II) shall be transferred by the
forfeiting Sponsor (or Affiliate thereof) that Beneficially Owns such Founder Shares to the Acquiror, without any consideration for such Transfer. 

  
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	 	II.	 Unvested Private Placement Warrants that are forfeited by a Sponsor (or Affiliate thereof) pursuant to
paragraph 4(c)(2) shall be transferred by the forfeiting Sponsor (or Affiliate thereof) that Beneficially Owns such Private Placement Warrants to the Acquiror, without any consideration for such transfer. 
	 

 4.    Stock Price Level. For purposes of this paragraph
4(c), the applicable “Stock Price Level” will be considered achieved only (a) when the VWAP of Common Stock on the New York Stock Exchange is greater than or equal to the applicable threshold for any 20 Trading Days
within a 30 Trading Day period or (b) in an Acquiror Sale, the price paid per share of Common Stock in such Acquiror Sale is greater than or equal to the applicable threshold. The Stock Price Levels will be equitably adjusted on account of any
share split, reverse share split or similar equity restructuring transaction. 
 5.     Acquiror
Sale. Notwithstanding the foregoing, in the event the Acquiror enters into a binding agreement with respect to an Acquiror Sale on or before the fifth anniversary of the Closing Date, all unvested Founder Shares and unvested Private Placement
Warrants Beneficially Owned by each Sponsor (or any Affiliate thereof), if any, shall vest on the day prior to the closing of such Acquiror Sale if the price paid per share of Common Stock in such Acquiror Sale meets or exceeds the applicable Stock
Price Level (to the extent the price paid per share includes contingent consideration or property other than cash, the Acquiror Board shall determine the price paid per share of Common Stock in such Acquiror Sale in good faith); provided,
that in the event the price paid per share of Common Stock in such Acquiror Sale does not meet or exceed the applicable Stock Price Level, such unvested Founder Shares and unvested Private Placement Warrants shall be forfeited without any
consideration on the day prior to the closing of such Acquiror Sale. For avoidance of doubt, following a transaction or business combination that is not a “Acquiror Sale” hereunder, including a transaction or business combination in which
the equity securities of the surviving entity of such business combination or other transaction are registered under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and listed or quoted for trading on a
national securities exchange, the equitable adjustment provisions of paragraph 17 shall apply, including, without limitation, to the performance vesting criteria set forth in this paragraph 4(c). 

5.    Each Sponsor severally and not jointly, as to itself only, represents and warrants that it has never been suspended or expelled from
membership in any securities or commodities exchange or association or had a securities or commodities license or registration denied, suspended or revoked. 

6.    Except as disclosed in the Prospectus, neither any Sponsor nor any Affiliate of any Sponsor, nor any director or officer of the
Acquiror, shall receive from the Acquiror any finder’s fee, reimbursement, consulting fee, monies in respect of any repayment of a loan or other compensation prior to, or in connection with any services rendered in order to effectuate the
consummation of the Acquiror’s initial Business Combination (regardless of the type of transaction that it is, but including, for the avoidance of doubt, the Merger), other than the following, none of which will be made from the proceeds held
in the Trust Account prior to the completion of the initial Business Combination: repayment of a loan and advances of up to $300,000 made to the Acquiror by the Sponsors to cover expenses related to the organization of the Acquiror and the Public
Offering; payment to an affiliate of Mosaic Sponsor, LLC for office space and related support services for a total of $15,000 per month; reimbursement for any reasonable
out-of-pocket expenses related to identifying, investigating and consummating an initial Business Combination, and repayment of loans, if any, and on such terms as to be
determined by the Acquiror from time to time, made by the Sponsors or certain of the Acquiror’s officers and directors to finance transaction costs in connection with an intended initial Business Combination, provided, that, if the
Acquiror does not consummate an initial Business Combination, a portion of the working capital held outside the Trust Account may be used by the Acquiror to repay such loaned amounts so long as no proceeds from the Trust Account are used for such
repayment. Up to $1,500,000 of such loans may be convertible into warrants of the post Business Combination entity at a price of $1.50 per warrant at the option of the lender. Such warrants would be identical to the Private Placement Warrants.
During the 

  
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period commencing on the date hereof and ending on the earlier of (i) the consummation of the Closing and (ii) the valid termination of the Merger Agreement, each Sponsor agrees not to
enter into, modify or amend any Contract between or among any Sponsor or any Affiliate of any such Sponsor (other than Acquiror or any of its Subsidiaries), on the one hand, and Acquiror or any of its Subsidiaries, on the other hand, that would
contradict, limit, restrict or impair (x) any party’s ability to perform or satisfy any obligation under this Sponsor Agreement or (y) the Company’s or Acquiror’s ability to perform or satisfy any obligation under the Merger
Agreement. 
 7.    Each Sponsor has full right and power, without violating any agreement to which it is bound (including, without
limitation, any non-competition or non-solicitation agreement with any employer or former employer), to enter into this Sponsor Agreement. 

8.    As used herein, (i) “Beneficially Own” has the meaning ascribed to it in Section 13(d) of the
Securities Exchange Act; (ii) “Business Combination” shall mean a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination, involving the Acquiror and one or more businesses;
(iii) “Shares” shall mean, collectively, the shares of Common Stock and the Founder Shares; (iv) “Founder Shares” shall mean the shares of Class F Common Stock, par value $0.0001 per share, and
the shares of Common Stock issuable upon conversion of such shares in connection with the Closing; (v) “Private Placement Warrants” shall mean the warrants to purchase up to 5,933,334 shares of Common Stock
Beneficially Owned by the Sponsors in the aggregate; (vi) “Prospectus” shall mean the registration statement on Form S-1 and prospectus filed by Acquiror with the U.S. Securities and
Exchange Commission (the “Commission”) in connection with the Public Offering; (vii) “Public Offering” shall mean the underwritten initial public offering of 34,500,000 of Acquiror’s units (the
“Units”), each comprised of one share of Common Stock and one-third of one warrant to purchase shares of Common Stock; (viii) “Public Stockholders” shall mean
the holders of securities issued in the Public Offering; (ix) “Trust Account” shall mean the trust fund into which a portion of the net proceeds of the Public Offering and the sale of the Private Placement Warrants was
deposited; and (x) “Transfer” shall mean the (a) sale of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or
indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act and the rules and regulations of the Commission
promulgated thereunder with respect to, any security, (b) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to
be settled by delivery of such securities, in cash or otherwise, or (c) public announcement of any intention to effect any transaction specified in clause (a) or (b). 

9.    This Sponsor Agreement and the other agreements referenced herein constitute the entire agreement and understanding of the parties
hereto in respect of the subject matter hereof and supersede all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the
transactions contemplated hereby, including, without limitation, with respect to the Sponsors, the Prior Letter Agreement. This Sponsor Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as to any
particular provision, except by a written instrument executed by the Acquiror and the other parties charged with such change, amendment, modification or waiver, it being acknowledged and agreed that the Company’s execution of such an instrument
will not be required after any valid termination of the Merger Agreement. 
 10.    No party hereto may, except as set forth herein,
assign either this Sponsor Agreement or any of its rights, interests, or obligations hereunder without the prior written consent of the other parties (except that, following any valid termination of the Merger Agreement, no consent from the Company
shall be required). Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title to the purported assignee. This Sponsor Agreement shall be binding on the
Sponsors, the Acquiror and the Company and their respective successors, heirs, personal representatives and assigns and permitted transferees. 

  
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 11.    This Sponsor Agreement may be executed in any number of original, electronic or
facsimile counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. 

12.    This Sponsor 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 Sponsor 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 Sponsor Agreement a provision as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable. 

13.    This Sponsor Agreement, and all claims or causes of action based upon, arising out of, or related to this Sponsor Agreement or the
transactions contemplated hereby, shall be governed by, and construed in accordance with, the Laws of the State of New York, without giving effect to principles or rules of conflict of laws to the extent such principles or rules would require or
permit the application of Laws of another jurisdiction. Any Action based upon, arising out of or related to this Sponsor Agreement or the transactions contemplated hereby may be brought in federal and state courts located in the Borough of Manhattan
in the State of New York, and each of the parties irrevocably submits to the exclusive jurisdiction of each such court in any such Action, waives any objection it may now or hereafter have to personal jurisdiction, venue or convenience of forum,
agrees that all claims in respect of the Action shall be heard and determined only in any such court, and agrees not to bring any Action arising out of or relating to this Sponsor Agreement or the transactions contemplated hereby in any other court.
Nothing herein contained shall be deemed to affect the right of any party to serve process in any manner permitted by Law or to commence legal proceedings or otherwise proceed against any other party in any other jurisdiction, in each case, to
enforce judgments obtained in any Action brought pursuant to this paragraph. The prevailing party in any such Action (as determined by a court of competent jurisdiction) shall be entitled to be reimbursed by the
non-prevailing party for its reasonable expenses, including reasonable attorneys’ fees, incurred with respect to such Action. EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO
TRIAL BY JURY IN ANY ACTION BASED UPON, ARISING OUT OF OR RELATED TO THIS SPONSOR AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. 

14.    Any notice, consent or request to be given in connection with any of the terms or provisions of this Sponsor Agreement shall be in
writing and shall be sent or given in accordance with the terms of Section 11.02 of the Merger Agreement to the applicable party at its principal place of business. 

15.    This Sponsor Agreement shall terminate on the earlier of (a) the consummation of an Acquiror Sale and (b) the later of
(i) the earlier of (x) the achievement of a $15.00 Stock Price Level on or before the fifth anniversary of the Closing Date and (y) the fifth anniversary of the Closing Date and (ii) the expiration of the Lock-up Period. In the event of a valid termination of the Merger Agreement, this Sponsor Agreement shall be of no force and effect and shall revert to the Prior Letter Agreement. No such termination or reversion
shall relieve the Sponsors, the Acquiror or the Company from any liability resulting from a breach of this Sponsor Agreement occurring prior to such termination or reversion. 

16.    Each of the Sponsors hereby represents and warrants (severally and not jointly as to itself only) to Acquiror and the Company as
follows: (i) it is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is organized, and the execution, delivery and performance of this Sponsor Agreement and the consummation of the transactions
contemplated hereby are within such Sponsor’s limited liability company powers and have been duly authorized by all necessary limited liability company actions on the part of such Sponsor; (ii) this Sponsor Agreement has been duly executed
and delivered by such Sponsor and, assuming due authorization, execution and delivery by the other parties to this Sponsor Agreement, this Sponsor Agreement constitutes a legally valid and binding obligation of such Sponsor, enforceable against such
Sponsor in accordance with the terms hereof (except as enforceability may be limited by bankruptcy Laws, other similar Laws affecting creditors’ rights and general principles of equity affecting the availability of specific performance and
other equitable remedies); (iii) the execution and delivery of this Sponsor Agreement by such Sponsor does not, and the performance by such Sponsor of its obligations hereunder will not, (A) conflict with or result in a violation of the
organizational documents 

  
 8 

 
of such Sponsor, or (B) require any consent or approval that has not been given or other action that has not been taken by any third party (including under any Contract binding upon such
Sponsor or such Sponsor’s Founder Shares or Private Placement Warrants, as applicable), in each case, to the extent such consent, approval or other action would prevent, enjoin or materially delay the performance by such Sponsor of its
obligations under this Sponsor Agreement; (iv) there are no Actions pending against such Sponsor or, to the knowledge of such Sponsor, threatened against such Sponsor, before (or, in the case of threatened Actions, that would be before) any
arbitrator or any Governmental Authority, which in any manner challenges or seeks to prevent, enjoin or materially delay the performance by such Sponsor of its obligations under this Sponsor Agreement; (v) except for fees described on Schedule
5.10 of the Merger Agreement, no financial advisor, investment banker, broker, finder or other similar intermediary is entitled to any fee or commission from such Sponsor, Acquiror, any of its Subsidiaries or any of their respective Affiliates in
connection with the Merger Agreement or this Sponsor Agreement or any of the respective transactions contemplated thereby and hereby, in each case, based upon any arrangement or agreement made by or, to the knowledge of such Sponsor, on behalf of
such Sponsor, for which Acquiror, the Company or any of their respective Affiliates would have any obligations or liabilities of any kind or nature; (vi) such Sponsor has had the opportunity to read the Merger Agreement and this Sponsor
Agreement and has had the opportunity to consult with its tax and legal advisors; (vii) such Sponsor has not entered into, and shall not enter into, any agreement that would restrict, limit or interfere with the performance of such
Sponsor’s obligations hereunder; (viii) such Sponsor has good title to all such Founder Shares and Private Placement Warrants, and there exist no Liens or any other limitation or restriction (including, without limitation, any restriction
on the right to vote, sell or otherwise dispose of such Founder Shares or Private Placement Warrants (other than transfer restrictions under the Securities Act)) affecting any such Founder Shares or Private Placement Warrants, other than pursuant to
(A) this Sponsor Agreement, (B) the Acquiror’s certificate of incorporation, (C) the Merger Agreement, (D) the Registration Rights Agreement, dated as of October 18, 2017, by and among the Acquiror and the Sponsors, or
(E) any applicable securities laws; and (ix) the Founder Shares and Private Placement Warrants identified on Schedule A are the only Founder Shares or Private Placement Warrants owned of record or Beneficially Owned by such Sponsor as of
the date hereof, and none of such Founder Shares or Private Placement Warrants is subject to any proxy, voting trust or other agreement or arrangement with respect to the voting of such Founder Shares or Private Placement Warrants, except as
provided in this Sponsor Agreement. 
 17.    If, and as often as, there are any changes in the Acquiror, the Founder Shares or the
Private Placement Warrants by way of stock split, stock dividend, combination or reclassification, or through merger, consolidation, reorganization, recapitalization or business combination, or by any other means, equitable adjustment shall be made
to the provisions of this Sponsor Agreement as may be required so that the rights, privileges, duties and obligations hereunder shall continue with respect to Acquiror, Acquiror’s successor or the surviving entity of such transaction, the
Founder Shares and Private Placement Warrants, each as so changed. For avoidance of doubt, such equitable adjustment shall be made to the performance criteria set forth in paragraph 4(c). 

18.    Each of the parties hereto agrees to execute and deliver hereafter any further document, agreement or instrument of assignment,
transfer or conveyance as may be necessary or desirable to effectuate the purposes hereof and as may be reasonably requested in writing by another party hereto. 

[signature page follows] 

  
 9 

 
			
	Sincerely,
	
	MOSAIC SPONSOR, LLC
		
	By:	 	 /s/ David M. Maura

		 	Name: David M. Maura
		 	Title: Chief Executive Officer
	
	FORTRESS MOSAIC SPONSOR LLC
		
	By:	 	 /s/ Constantine M. Dakolias

		 	Name: Constantine M. Dakolias
		 	Title: President
	
	EUGENE I. DAVIS
	
	/s/ Eugene Davis

  
 10 

			
	Acknowledged and Agreed:
	
	MOSAIC ACQUISITION CORP.
		
	By:	 	 /s/ David M. Maura

		 	Name: David M. Maura
		 	Title: Chairman, President and Chief Executive Officer
	
	Acknowledged and Agreed:
	
	VIVINT SMART HOME, INC.
		
	By:	 	 /s/ Alex J. Dunn

	Name: Alex J. Dunn
	Title: President

  
 11 

 Schedule A 

Sponsor Ownership of Securities 
  

									
	 Sponsor
	 	Founder
Shares	 	 	Private
Placement
Warrants	 
	 Eugene I. Davis
	 	 	30,000	 	 	 	0	 
	 Mosaic Sponsor LLC
	 	 	4,297,500	 	 	 	2,966,667	 
	 Fortress Mosaic Sponsor LLC
	 	 	4,297,500	 	 	 	2,966,667	 
		 	  
	  
	 	 	  
	  
	 
	 Total
	 	 	8,625,000	 	 	 	5,933,334	 
		 	  
	  
	 	 	  
	  
	 

  
 12EX-10.23

 Exhibit 10.23 

Subscription Agreement 

September 15, 2019 
 Mosaic Acquisition Corp.

 375 Park Avenue 
 New York, NY 10152 

Vivint Smart Home, Inc. 
 4931 North 300 West 

Provo, UT 84604 
 Ladies and Gentlemen: 

WHEREAS, in connection with the proposed business combination (the “Transaction”) between Mosaic Acquisition Corp., a Delaware
corporation (the “Company”), Maiden Merger Sub, Inc., a Delaware corporation, and Vivint Smart Home, Inc., a Delaware corporation (“Voyager”), pursuant to an Agreement and Plan of Merger, dated as of
September 15, 2019, among the Company, Merger Sub and Voyager (as may be amended and/or restated, the “Transaction Agreement”), the Company proposes to issue and sell to Blackstone Capital Partners VI LP. (the
“Subscriber”) 9,934,500 shares of the Company’s Class A common stock, par value $0.0001 per share (the “Class A Common Stock”), in a private placement transaction (such transaction, the
“Subscription”). 
 NOW, THEREFORE, the Subscriber, the Company and Voyager agree as follows (this
“Agreement”): 
 1.    Subscription. Subject to the terms and conditions hereof, the Subscriber hereby agrees to
subscribe for and purchase, and the Company hereby agrees to issue and sell to the Subscriber, 9,934,500 shares of Class A Common Stock (the “Shares”) for an aggregate purchase price of $99,345,000.00 (the “Subscription
Amount”). Notwithstanding anything in this Agreement to the contrary but subject to the following proviso, in the event the Closing occurs and the Subscription Amount is funded in accordance with Section 2 below, the Subscriber shall
have no liability for any claims or losses arising out of this Agreement; provided, in the event the Subscription Amount is not funded in accordance with Section 2 below, the Subscriber’s liability for any claims or losses arising
out of this Agreement shall be limited to the Subscription Amount. 
 2.    Closing. The closing of the sale of Shares (the
“Closing”) contemplated under this Agreement 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) written notice from (or on behalf of) the Company to the Subscriber (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 two (2) Business Days from the date of the Closing Notice, the Subscriber shall deliver to the Company on or prior to the closing date specified in the Closing Notice (the “Expected Closing Date”; the date on which the
Closing actually occurs, the “Closing Date”) the Subscription Amount by wire transfer of United States dollars in immediately available funds to the account specified by the Company in the Closing Notice

  
 1 

 
against delivery of the Shares in certificated or book entry form to the Subscriber or to a custodian designated by the Subscriber, as applicable. In the event the closing of the Transaction does
not occur within ten (10) Business Days of the Expected Closing Date, the Company shall promptly (but no later than ten (10) Business Days thereafter) return the Subscription Amount to the Subscriber by wire transfer of United States
dollars in immediately available funds to the account specified by the Subscriber, and any book entries shall be deemed cancelled. Notwithstanding such return or cancellation, (A) a failure to close on the Expected Closing Date shall not, by
itself, be deemed to be a failure of any of the conditions to Closing set forth in Section 3 of this Agreement to be satisfied or waived on or prior to the Closing, and (B) the Subscriber shall still be obligated to consummate the Closing
upon (I) satisfaction of the conditions set forth in Section 3 below and (II) the Company’s delivery to the Subscriber of a new Closing Notice. 

3.    Closing Conditions. 

(a)    The obligation of the Subscriber, on the one hand, and the Company, on the other hand, to effect the Closing is
subject to the satisfaction or written waiver by the Subscriber and the Company prior to the Closing of the following conditions: 

(i)    there shall not have been enacted or promulgated any order, judgment, injunction, decree, writ, stipulation,
determination or award, in each case, entered by or with any court or governmental agency or body, domestic or foreign, nor any statute, rule or regulation, in either case, enjoining or prohibiting the consummation of the Subscription; and 

(ii)    the Transaction as set forth in the Transaction Agreement shall have been consummated substantially concurrently
with the Closing. 
 (b)    The obligation of the Subscriber to effect the Closing is also subject to the satisfaction
or written waiver by the Subscriber prior to the Closing of the following conditions: 
 (i)    all representations and
warranties of the Company contained in this Agreement shall be true and correct in all material respects (other than representations and warranties that are qualified as to materiality or Company Material Adverse Effect (as defined herein), which
representations and warranties shall be true in all respects) at and as of the date hereof and the Closing Date, and consummation of the Closing shall constitute a reaffirmation by the Company of each of the representations, warranties and
agreements of the Company contained in this Agreement as of the Closing Date, but in each case without giving effect to consummation of the Transaction; provided, in the event this condition would otherwise fail to be satisfied as a result of
a breach of one or more of the representations and warranties of the Company contained in this Agreement and the facts underlying such breach would also cause a condition to Voyager’s obligations under the Transaction Agreement to fail to be
satisfied, this condition shall nevertheless be deemed satisfied in the event Voyager waives such breach under the Transaction Agreement; and 

(ii)    no amendment or modification of the Transaction Agreement (as the same exists on the date hereof as provided to
the Subscriber) shall have occurred that would reasonably be expected to materially and adversely affect the economic benefits that the Subscriber would reasonably expect to receive under this Agreement, unless the Subscriber has consented in
writing to such amendment or modification. 

  
 2 

 (c)    The obligation of the Company to effect the Closing is also
subject to the satisfaction or written waiver by either the Company or Voyager prior to the Closing of the following condition: 

(i)    all representations and warranties of the Subscriber contained in this Agreement shall be true and correct in all
material respects at and as of the date hereof and the Closing Date, and consummation of the Closing shall constitute a reaffirmation by the Subscriber of each of the representations, warranties and agreements of the Subscriber contained in this
Agreement as of the Closing Date, but in each case without giving effect to consummation 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 Agreement. 
 5.    Company Representations and Warranties. The Company represents and warrants to the
Subscriber that: 
 (a)    The Company is duly incorporated and is validly existing as a corporation in good standing
under the laws of Delaware and has the corporate power and authority to own, lease or operate its assets and properties and to conduct its business as it is now being conducted. 

(b)    The Shares have been duly authorized and, when issued and delivered to the Subscriber against full payment therefor
in accordance with the terms of this 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 Certificate of Incorporation or under the laws of the State of Delaware. 
 (c)    This
Agreement has been duly authorized, executed and delivered by the Company and is enforceable in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws affecting
creditors’ rights generally and subject, as to enforceability, to general principles of equity. 
 (d)    The
issuance and sale of the Shares and the performance by the Company of this Agreement and the consummation of the transactions herein 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 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, lease, license or 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 ability of the Company to consummate the transactions herein (a “Company Material Adverse Effect”); (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 

  
 3 

 
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 Company
Material Adverse Effect. 
 (e)    There are no securities or instruments issued by or to which the Company is a party
containing anti-dilution or similar provisions that will be triggered by the issuance of (i) the Shares, or (ii) the securities to be issued pursuant to any other subscription agreement with investors that have agreed to purchase
securities in connection with the Transaction, that have not been or will be waived on or prior to the Closing Date. 

(f)    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 Agreement for which the Subscriber could become liable (it being understood
that the Subscriber will effectively bear its pro rata share of any such expenses indirectly as a result of its investment in the Company). 

(g)    As of the date of this Agreement, the authorized capital stock of the Company consists of 221,000,000 shares of
capital stock, consisting of (i) 200,000,000 shares of Class A Common Stock, (ii) 20,000,000 shares of Class F Common Stock, par value $0.0001 per share, and (iii) 1,000,000 shares of Preferred Stock. As of the date of this Agreement, the
issued and outstanding capital stock of the Company consists of 43,125,000 shares of capital stock, consisting of (A) 34,500,000 shares of Class A Common Stock, (B) 8,625,000 shares of Class F Common Stock, and (C) no shares of
Preferred Stock. As of the date of this Agreement, the Company has 17,433,334 warrants outstanding, each such warrant entitling the holder thereof to purchase one (1) share of Class A Common Stock. 

6.    Subscriber Representations and Warranties. The Subscriber represents and warrants to the Company that: 

(a)    The Subscriber is (i) a “qualified institutional buyer” (as defined in Rule 144A (“Rule
144A”) under the Securities Act of 1933 as amended (the “Securities Act”)) or (ii) an institutional “accredited investor” (within the meaning of Rule 501(a) under the Securities Act), in each case, satisfying
the requirements set forth on Schedule A, and is acquiring the Shares only for his, her or its own account and 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). 

(b)    The Subscriber 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 have not been registered under the Securities Act. The Subscriber understands that the Shares may not be resold, transferred, pledged or otherwise disposed of by the Subscriber 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

  
 4 

 
(iii), in accordance with any applicable securities laws of the states and other jurisdictions of the United States, and that any certificates or book entry account representing the Shares shall
contain a legend to such effect substantially consistent with the legend set forth in Section 7(b). The Subscriber acknowledges that the Shares will not be eligible for resale pursuant to Rule 144A. The Subscriber understands and agrees that
the Shares will be subject to transfer restrictions and, as a result of these transfer restrictions, the Subscriber 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 Subscriber 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 Subscriber understands and agrees that the Subscriber is purchasing Shares directly from the Company. The
Subscriber further acknowledges that there have been no representations, warranties, covenants and agreements made to the Subscriber with respect to the Shares by the Company, or its officers or directors, expressly or by implication, other than
those representations, warranties, covenants and agreements included in this Agreement. 
 (d)    The Subscriber
acknowledges and agrees that the Subscriber has received such information as the Subscriber deems necessary in order to make an investment decision with respect to the Shares. Without limiting the generality of the foregoing, the Subscriber
acknowledges that it has reviewed (i) the Company’s and APX Group Holdings, Inc.’s filings with the Securities and Exchange Commission (“SEC”); and (ii) certain business and legal due diligence materials with
respect to Voyager provided to the Subscriber by the Company. The Subscriber represents and agrees that the Subscriber and the Subscriber’s professional advisor(s), if any, have had the full opportunity to ask such questions, receive such
answers and obtain such information as the Subscriber and the Subscriber’s professional advisor(s), if any, have deemed necessary to make an investment decision with respect to the Shares. 

(e)    The Subscriber became aware of this offering of the Shares solely by means of direct contact between the Subscriber
and the Company or a representative of the Company, and the Shares were offered to the Subscriber solely by direct contact between the Subscriber and the Company or a representative of the Company. The Subscriber did not become aware of this
offering of the Shares, nor were the Shares offered to the Subscriber, by any other means. The Subscriber 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. 

(f)    The Subscriber 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 Company’s and APX Group Holdings, Inc.’s filings with the SEC. The Subscriber 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 Subscriber has sought such accounting, legal and tax advice as the Subscriber has considered necessary to make an informed investment decision. 

(g)    Alone, or together with any professional advisor(s), the Subscriber 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 Subscriber and that the Subscriber is able at this time and in the foreseeable future to bear the economic risk of a total loss of the
Subscriber’s investment in the Company. The Subscriber acknowledges specifically that a possibility of total loss exists. 

  
 5 

 (h)    In making its decision to purchase the Shares, the Subscriber has
relied solely upon independent investigation made by the Subscriber. Without limiting the generality of the foregoing, the Subscriber has not relied on any statements or other information provided by anyone other than the Company concerning the
Company or the Shares or the offer and sale of the Shares. 
 (i)    The Subscriber 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. 

(j)    The Subscriber has been duly formed or incorporated and is validly existing in good standing under the laws of its
jurisdiction of incorporation or formation. 
 (k)    The execution, delivery and performance by the Subscriber of this
Agreement are within the powers of the Subscriber, 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 Subscriber is a party or by which the Subscriber is bound, and will not violate any provisions of the Subscriber’s charter documents, including, without limitation, its
incorporation or formation papers, bylaws, indenture of trust or partnership or operating agreement, as may be applicable, or any other agreements to which it is party or to which its assets or business are subject. The signature of the Subscriber
on this Agreement is genuine, and the signatory has been duly authorized to execute the same, and this Agreement constitutes a legal, valid and binding obligation of the Subscriber, enforceable against the Subscriber in accordance with its terms,
subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws affecting creditors’ rights generally and subject, as to enforceability, to general principles of equity. 

(l)    Neither the due diligence investigation conducted by the Subscriber in connection with making its decision to
acquire the Shares nor any representations and warranties made by the Subscriber herein shall modify, amend or affect the Subscriber’s right to rely on the truth, accuracy and completeness of the Company’s representations and warranties
contained herein. 
 (m)    The Subscriber 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. The Subscriber agrees to provide law enforcement agencies, if requested thereby,
such records as required by applicable law, provided that the Subscriber is permitted to do so under applicable law. If the Subscriber 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, 

  
 6 

 
the “BSA/PATRIOT Act”), the Subscriber maintains policies and procedures reasonably designed to comply with applicable obligations under the BSA/PATRIOT Act. To the extent
required by law, 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 by law, it maintains policies and procedures reasonably
designed to ensure that the funds held by the Subscriber and used to purchase the Shares were legally derived. 

(n)    Subject to the satisfaction of the terms and conditions of this Agreement, the Subscriber will have sufficient
funds to pay the Subscription Amount pursuant to Section 2 at the Closing. 
 (o)    The Subscriber acknowledges
and agrees that this Agreement is being entered into in order to induce Voyager to enter into the Transaction Agreement and that Voyager is a third-party beneficiary of the Subscriber’s commitment hereunder. 

7.    Delivery of Securities. 

(a)    The Company shall register the Subscriber as the owner of the Shares purchased by the Subscriber hereunder
(individually or collectively, the “Securities”) in the appropriate books and records of the Company and with the Company’s transfer agent in certificated form or by book entry on or promptly after (but in no event more than
two (2) Business Days after) the date of the Closing. 
 (b)    Each register and book entry for the Securities
shall contain a notation, and each certificate (if any) evidencing the Securities shall be stamped or otherwise imprinted with a legend, in substantially the following form: 

“THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY
STATE OR OTHER JURISDICTION, AND MAY NOT BE TRANSFERRED IN VIOLATION OF SUCH ACT AND LAWS. 
 THE SALE, PLEDGE, HYPOTHECATION, OR TRANSFER OF
THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND CONDITIONS OF A CERTAIN SUBSCRIPTION AGREEMENT BY AND AMONG THE HOLDER AND THE OTHER PARTIES THERETO. COPIES OF SUCH AGREEMENT MAY BE OBTAINED UPON WRITTEN REQUEST TO THE SECRETARY OF
THE COMPANY. 
 (c)    If the Securities are eligible to be sold without restriction under, and without the Company
being in compliance with the current public information requirements of, Rule 144 under the Securities Act, then at the Subscriber’s request, the Company will cause the Company’s transfer agent to remove the legend set forth in
Section 7(b). In connection therewith, if required by the Company’s transfer agent, the Company will promptly cause an opinion of counsel to be delivered to and maintained with its transfer agent, together with any other authorizations,
certificates and directions required by the transfer agent that authorize and direct the transfer agent to issue such Securities without any such legend. 

  
 7 

 8.    Stockholders Agreement; Registration Rights Agreement. The Subscriber, the
Company and the other parties thereto have entered into a stockholders agreement concurrently with the execution of this Agreement attached hereto as Exhibit 1. The Subscriber, the Company and the other parties thereto have
entered into a registration rights agreement concurrently with the execution of this Agreement attached hereto as Exhibit 2. 

9.    Termination. This 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) the mutual written agreement of each of the parties hereto and Voyager to terminate this Agreement or (c) if any of the conditions to Closing set forth in Section 3 of this Agreement are not satisfied or waived on or prior to the
Closing and, as a result thereof, the transactions contemplated by this Agreement are not consummated at the Closing. The Company shall promptly notify the Subscriber of (i) the termination of the Transaction Agreement promptly after the
termination of such agreement, (ii) any amendment to the Transaction Agreement and (iii) any waiver of any of the conditions specified in Article IX of the Transaction Agreement. 

10.    Trust Account Waiver. The Subscriber acknowledges that the Company is a blank check company with the powers and privileges
necessary or convenient to the conduct, promotion or attainment of the business or purposes of the Company, including, but not limited to, effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar
business combination involving the Company and one or more businesses. The Subscriber hereby acknowledges that the Company established the trust account at J.P. Morgan Chase Bank, N.A. (the “Trust Account”), maintained by
Continental Stock Transfer & Trust Company, a New York corporation, acting as trustee, pursuant to the Investment Management Trust Agreement, dated October 18, 2017, by and between the Company and the trustee, for the benefit of its
public shareholders upon the closing of its initial public offering. For and in consideration of the Company entering into this Agreement, the receipt and sufficiency of which are hereby acknowledged, the Subscriber hereby irrevocably waives any and
all right, title and interest, or any claim of any kind it has or may have in the future, in or to any monies held in the Trust Account, and agrees not to seek recourse against the Trust Account as a result of, or arising out of, this Agreement.

 11.    Miscellaneous. 

(a)    The Company may not assign either this Agreement or any of its rights, interests or obligations hereunder without
the prior written consent of the Subscriber and Voyager. The Subscriber may assign this Agreement and any of its rights, interests or obligations hereunder (including the Subscriber’s rights to purchase the Shares) to (i) BCP Voyager
Holdings LP or (ii) any Person who is both (A) an accredited investor and (B) an equityholder of 313 Acquisition LLC (“313”) or an equityholder of Voyager (other than 313), in either case of clause (i) or clause
(ii), as of the date of this Agreement (such a Person (other than the Subscriber or Blackstone VNT Co-Invest, L.P.), an “Eligible Participant”); provided, however, that any such
assignment shall not relieve the Subscriber of its obligations under this Agreement in the event that such assignee of the Subscriber fails to perform its obligations hereunder and that, without the prior written consent of the Company and Voyager,
such assignee shall not be permitted to further 

  
 8 

 
assign any such rights, interests or obligations assigned to it; provided, further, that the aggregate amount of the Subscription Amount assigned to all Eligible Participants may
not exceed an amount equal to the Subscription Amount multiplied by the percentage of the beneficial ownership of Voyager owned by all Eligible Participants (for the avoidance of doubt, the Eligible Participants’ beneficial ownership of Voyager
shall be determined by combining the Eligible Participants’ direct ownership in Voyager and the Eligible Participants’ indirect ownership in Voyager through 313 (as determined based on their pro rata ownership of 313)). 

(b)    The Company may request from the Subscriber such additional information as the Company may deem necessary to
evaluate the eligibility of the Subscriber to acquire the Shares, and the Subscriber 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 Subscriber acknowledges that the Company will rely on the acknowledgments, understandings,
agreements, representations and warranties contained in this Agreement. Prior to the Closing, the Subscriber agrees to promptly notify the Company if any of the acknowledgments, understandings, agreements, representations and warranties set forth
herein are no longer accurate. The Subscriber further acknowledges and agrees that Voyager is a third-party beneficiary of the representations and warranties of the Subscriber contained in Section 6 of this Agreement. 

(d)    Each of the Company and Voyager is entitled to rely upon this Agreement and is irrevocably authorized to produce
this 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. 

(e)    All the agreements, representations and warranties made by each party hereto in this Agreement shall survive the
Closing. 
 (f)    This Agreement may not be modified or waived (i) except by an instrument in writing, signed by
the party against whom enforcement of such modification or waiver is sought and (ii) without the prior written consent of Voyager. 

(g)    This 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 Agreement shall not confer any rights or remedies upon any person other than the parties hereto, and their respective
successors and assigns; provided, that, subject to the terms and conditions of this Agreement and the Transaction Agreement, Voyager shall have the right, as a third party beneficiary of this Agreement, to obtain specific performance of the
Subscriber’s obligation to cause the Subscription Amount to be funded when due hereunder (including, to the extent necessary to cause such funding, to cause the Subscriber to use reasonable best efforts to enforce contractual commitments
available to the Subscriber), but solely to the extent the Company has the right hereunder to enforce such obligation pursuant to the terms, and subject to the conditions, hereof and solely to the extent required to give effect to a grant of
specific performance to Voyager under and in accordance with the terms and conditions of the Transaction Agreement (as in effect on the date hereof), and for no other purpose, which right of Voyager as third party beneficiary shall be the sole and
exclusive direct or indirect right and remedy (whether at law or in equity) available to Voyager 

  
 9 

 
and its security holders and affiliates (or available to any Person claiming by, through, or on behalf or for the benefit of any of them) against the Subscriber or any of its direct or indirect
equityholders, management companies, affiliates, agents, attorneys, or representatives, and any financial advisor or lender or any affiliate of any of the foregoing, with respect to any claim (whether sounding in contract or tort, under statute or
otherwise) arising under or related to the Transaction Agreement or this Agreement or the transactions contemplated hereby or thereby or related negotiations, including without limitation in connection with any beach or alleged breach by the Company
of any obligation under or related to the Transaction Agreement (whether or not any such breach or alleged breach is caused by the Subscriber’s breach of its obligations under this Agreement) and any breach or alleged breach by the Subscriber
of any obligation under or related to this Agreement. 
 (h)    Except as otherwise provided herein, this 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. 

(i)    If any provision of this 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. 

(j)    This 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.

 (k)    The parties hereto agree that irreparable damage would occur in the event that any of the provisions of this
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 Agreement and to enforce
specifically the terms and provisions of this 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. 

(l)    THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF DELAWARE,
WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAWS THAT WOULD OTHERWISE REQUIRE THE APPLICATION OF THE LAW OF ANY OTHER STATE. EACH PARTY HERETO HEREBY WAIVES ANY RIGHT TO A JURY TRIAL IN CONNECTION WITH ANY LITIGATION PURSUANT TO THIS AGREEMENT
AND THE TRANSACTIONS CONTEMPLATED HEREBY. 
 (m)    Each party hereto hereby, and any person asserting rights as a
third party beneficiary hereunder may do so only if he, she or it, irrevocably agrees that any claims shall be brought only to the exclusive jurisdiction of the courts of the State of Delaware located in New Castle County or, if such courts decline
to exercise jurisdiction, any federal or state court located 

  
 10 

 
in New York County, New York, and each party hereby consents to the jurisdiction of such courts (and of the appropriate appellate courts therefrom) in any such suit, action or proceeding and
irrevocably waives, to the fullest extent permitted by law, any objection that it may now or hereafter have to the laying of the venue of any such suit, action or proceeding in any such court or that any such suit, action or proceeding that is
brought in any such court has been brought in an inconvenient forum. During the period a claim that is filed in accordance with this Section 11(m) is pending before a court, all actions, suits or proceedings with respect to such claim or any
other claim, including any counterclaim, cross-claim or interpleader, shall be subject to the exclusive jurisdiction of such court. Each party and any person asserting rights as a third party beneficiary may do so only if he, she or it hereby
waives, and shall not assert as a defense in any claim, that (a) such party is not personally subject to the jurisdiction of the above named courts for any reason, (b) such action, suit or proceeding may not be brought or is not
maintainable in such court, (c) such party’s property is exempt or immune from execution, (d) such action, suit or proceeding is brought in an inconvenient forum, or (e) the venue of such action, suit or proceeding is improper. A
final judgment in any action, suit or proceeding described in this Section 11(m) following the expiration of any period permitted for appeal and subject to any stay during appeal shall be conclusive and may be enforced in other jurisdictions by
suit on the judgment or in any other manner provided by law. 
 12.    Non-Reliance and
Exculpation. The Subscriber 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, Voyager, any of its affiliates or
any of its or their control persons, officers, directors and employees), other than the statements, representations and warranties contained in this Agreement, in making its investment or decision to invest in the Company. The Subscriber agrees that
neither (i) any other purchaser pursuant to this Agreement or any other agreement related to the private placement of the Shares (including the respective controlling persons, officers, directors, partners, agents, or employees of any such
purchaser) nor (ii) Voyager, its affiliates or any of its or their affiliates’ control persons, officers, directors or employees, shall be liable to any other purchaser pursuant to this Agreement or any other 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] 

  
 11 

 IN WITNESS WHEREOF, the Subscriber has executed or caused this Agreement to be
executed by its duly authorized representative as of the date set forth above. 
  

			
	 Name of Subscriber:
  

BLACKSTONE CAPITAL PARTNERS VI LP.
  

By: BLACKSTONE MANAGEMENT
 ASSOCIATES VI L.L.C., its general
partner
  
 By:     BMA VI L.L.C., its sole
member

  

			
	By:	 	 /s/ Peter Wallace

	Name:	 	Peter Wallace 
	Its:	 	Senior Managing Director

 IN WITNESS WHEREOF, the Company has executed or caused this Agreement to be executed
by its duly authorized representative as of the date set forth above. 
  

			
	MOSAIC ACQUISITION CORP.
		
	By:	 	 /s/ David M. Maura

	Name:	 	David M. Maura
	Title:	 	Chairman, President and Chief Executive Officer

 IN WITNESS WHEREOF, Voyager has executed or caused this Agreement to be executed by
its duly authorized representative as of the date set forth above. 
  

			
	VIVINT SMART HOME, INC.
		
	By:	 	 /s/ Alex J. Dunn

	Name:	 	Alex J. Dunn 
	Title:	 	President

 SCHEDULE A 

ELIGIBILITY REPRESENTATIONS OF THE SUBSCRIBER 
  

	A.	 QUALIFIED INSTITUTIONAL BUYER STATUS 

(Please check the applicable subparagraphs): 
  

	 	1.	 ☐ We are a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act of
1933, as amended (the “Securities Act”)). 

  

	B.	 B. INSTITUTIONAL ACCREDITED INVESTOR STATUS 

(Please check the applicable subparagraphs): 
  

	 	1.	 X We are an “accredited investor” (within the meaning of Rule 501(a) under the Securities Act.) for
one or more of the following reasons (Please check the applicable subparagraphs): 

  

	 	☐	 We are a bank, as defined in Section 3(a)(2) of the Securities Act or any savings and loan association or
other institution as defined in Section 3(a)(5)(A) of the Securities Act, whether acting in an individual or a fiduciary capacity. 

  

	 	☐	 We are a broker or dealer registered under Section 15 of the Securities Exchange Act of 1934, as amended.

  

	 	☐	 We are an insurance company, as defined in Section 2(13) of the Securities Act. 

 

	 	☐	 We are an investment company registered under the Investment Company Act of 1940 or a business development
company, as defined in Section 2(a)(48) of that act. 

  

	 	☐	 We are a Small Business Investment Company licensed by the U.S. Small Business Administration under
Section 301(c) or (d) of the Small Business Investment Act of 1958. 

  

	 	☐	 We are a plan established and maintained by a state, its political subdivisions or any agency or
instrumentality of a state or its political subdivisions for the benefit of its employees, if the plan has total assets in excess of $5 million. 

  

	 	☐	 We are an employee benefit plan within the meaning of Title I of the Employee Retirement Income Security Act of
1974, if the investment decision is being made by a plan fiduciary, as defined in Section 3(21) of such act, and the plan fiduciary is either a bank, a savings and loan association, an insurance company, or a registered investment adviser, or
if the employee benefit plan has total assets in excess of $5 million. 

	 	☐	 We are a private business development company, as defined in Section 202(a)(22) of the Investment Advisers
Act of 1940. 

  

	 	X	 We are a corporation, Massachusetts or similar business trust, or partnership, or an organization described in
Section 501(c) (3) of the Internal Revenue Code of 1986, as amended, that was not formed for the specific purpose of acquiring the Securities, and that has total assets in excess of $5 million. 

 

	 	☐	 We are a trust with total assets in excess of $5 million not formed for the specific purpose of acquiring
the Securities, whose purchase is directed by a sophisticated person as described in Rule 506(b)(2)(ii) under the Securities Act. 

  

	 	☐	 We are an entity in which all of the equity owners are accredited investors. 

 

	C.	 AFFILIATE STATUS 

(Please check the applicable box) 

THE SUBSCRIBER: 
  

	 	☐	 is: 

  

	 	X	 is not: 

an “affiliate” (as defined in Rule 144 under the Securities Act) of the Company or acting on behalf of an affiliate of the Company.

 This page should be completed by the Subscriber and constitutes a part of the Agreement 

 EXHIBIT 1 

STOCKHOLDERS AGREEMENT 

[attached] 

 EXHIBIT 2 

REGISTRATION RIGHTS AGREEMENT 

[attached]

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