Document:

EX-10.2

 Exhibit 10.2 

Execution Version 

SUBSCRIPTION AGREEMENT 

This SUBSCRIPTION AGREEMENT (this “Subscription Agreement”) is entered into this 8th day of August, 2018, by and among Kayne Anderson Acquisition Corp., a Delaware corporation (the “Issuer”), and the subscriber party set forth on the signature page hereto
(“Subscriber”). 
 WHEREAS, the Issuer intends to enter into a Contribution Agreement (the “Contribution
Agreement”) with (a) Apache Midstream LLC, a Delaware limited liability company (“Apache”), (b) Altus Midstream LP, a Delaware limited partnership (“OpCo”), (c)(i) Alpine High Gathering LP, a Delaware
limited partnership (f/k/a Alpine High Gathering LLC) (“Alpine High Gathering”), (ii) Alpine High Pipeline LP, a Delaware limited partnership (f/k/a Alpine High Pipeline LLC) (“Alpine High Pipeline”), (iii) Alpine
High Processing LP, a Delaware limited partnership (f/k/a Alpine High Processing LLC) (“Alpine High Processing”), and (iv) Alpine High NGL Pipeline LP, a Delaware limited partnership (f/k/a Alpine High NGL Pipeline LLC)
(together with Alpine High Gathering, Alpine High Pipeline, and Alpine High Processing, the “Contributed Companies”), and (d) Alpine High Subsidiary GP LLC, a Delaware limited liability company, pursuant to which, among other
things, (i) the Issuer will contribute to OpCo cash in exchange for common units representing limited partner interests in OpCo (the “Common Units”); and (ii) Apache will contribute to OpCo, among other things, all of the
equity interests of the Contributed Companies, in exchange for Common Units and shares of the Issuer’s Class C common stock, par value $0.0001 per share (the foregoing transactions being referred to herein as the
“Transactions”); 
 WHEREAS, as of July 27, 2018, to finance a portion of the Transactions, the Issuer entered into
separate subscription agreements (the “Private PIPE Subscription Agreements”) with certain “accredited investors” (as such term is defined in Rule 501 under the Securities Act of 1933, as amended (the “Securities
Act”)), on terms substantially similar to those set forth in this Subscription Agreement, pursuant to which such investors have agreed to purchase an aggregate of 33,155,123 shares of the Issuer’s Class A common stock, par value
$0.0001 per share (the “Class A Shares”), on the Closing Date (the “Private PIPE Transactions”); 

WHEREAS, to finance a portion of the Transactions, Subscriber desires to subscribe for and purchase from the Issuer that number of
Class A Shares set forth on the signature page hereto (the “Acquired Shares”) for a purchase price of $10.00 per share and an aggregate purchase price set forth on the signature page hereto (the “Purchase
Price”), and the Issuer desires to issue and sell to Subscriber the Acquired Shares in consideration of the payment of the Purchase Price by or on behalf of Subscriber to the Issuer on or prior to the Closing (as defined below); and 

WHEREAS, to finance a portion of the Transactions, certain other “accredited investors” or “qualified institutional
buyers” (as defined in Rule 144A under the Securities Act), have (severally and not jointly) entered into separate subscription agreements (the “Other Subscription Agreements”) with the Issuer on terms and conditions
substantially the same as set forth in this Subscription Agreement, pursuant to which such investors have agreed to purchase Class A Shares on the Closing Date (as defined below) (collectively and, together with the Subscription (as defined
below) and one or more other private placements for the purpose of funding the Transactions, the “Marketed PIPE Transactions” and, together with the Private PIPE Transactions, the “PIPE Transactions”). 

 NOW, THEREFORE, in consideration of the foregoing and the mutual representations, warranties
and covenants, and subject to the conditions, herein contained, and intending to be legally bound hereby, the parties hereto hereby agree as follows: 

1.    Subscription. Subject to the terms and conditions hereof, Subscriber hereby agrees to subscribe for and
purchase, and the Issuer hereby agrees to issue and sell to Subscriber, upon the payment of the Purchase Price, the Acquired Shares (such subscription and issuance, the “Subscription”). 

2.    Closing. 

(a)    Subject to the satisfaction or waiver of the conditions set forth in Section 3, the
closing of the purchase and sale of the Acquired Shares contemplated hereby (the “Closing”) shall occur on the date of (the “Closing Date”) and substantially concurrently with the closing of the Transactions. Not
less than three (3) business days prior to the scheduled Closing Date (the “Scheduled Closing Date”), the Issuer shall deliver written notice to Subscriber specifying the Scheduled Closing Date (the “Closing
Notice”). 
 (b)    Subject to the satisfaction or waiver of the conditions set forth in
Section 3 (other than those conditions that by their nature are to be satisfied at Closing, but without affecting the requirement that such conditions be satisfied or waived at Closing), Subscriber shall deliver to the
Issuer on or prior to 8:00 A.M. eastern time (or as soon as practicable after the Issuer or its transfer agent provides a screenshot evidencing the issuance to Subscriber of the Acquired Shares on and as of the Closing Date) on the Closing Date
specified in the Closing Notice to Subscriber the Purchase Price for the Acquired Shares by wire transfer of United States dollars in immediately available funds to the account specified by the Issuer in the Closing Notice against delivery by the
Issuer to Subscriber of (i) the Acquired Shares in book entry form or to a custodian designated by Subscriber, as applicable, and (ii) written notice from the Issuer or its transfer agent evidencing the issuance to Subscriber of the
Acquired Shares on and as of the Closing Date. In the event that the Closing does not occur within one (1) business day after the Scheduled Closing Date specified in the Closing Notice, the Issuer shall promptly (but in no event later than two
(2) business days after the Scheduled Closing Date specified in the Closing Notice) return the funds so delivered by Subscriber to the Issuer by wire transfer of United States dollars in immediately available funds to the account specified by
Subscriber. 
 (c)    On the Closing Date, subject to the satisfaction or waiver of the conditions set forth in
Section 3, the Issuer shall deliver (or cause to be delivered) to Subscriber the Acquired Shares in book-entry form against payment by Subscriber to the Issuer of the Purchase Price as provided in
Section 2(b). 

  
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 (d)    Each book entry for the Acquired Shares shall contain a notation,
and each certificate (if any) evidencing the Acquired Shares shall be stamped or otherwise imprinted with a legend, in substantially the following form: 

“THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY
STATE OR OTHER JURISDICTION, AND MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM.” 

(e)    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 Closing as contemplated by this Subscription Agreement. 

3.    Closing Conditions 

(a)    The obligations of each of the Issuer and Subscriber to consummate the Closing are subject to the satisfaction on
the Closing Date, or the waiver by each of the Issuer and Subscriber, of each of the following conditions: 

(i)    all conditions precedent to the closing of the Transactions provided for in the Contribution Agreement shall have
been satisfied or waived (other than those conditions that by their nature may only be satisfied at the closing of the Transactions, but subject to satisfaction of such conditions as of the closing of the Transactions and provided that any such
waiver does not materially adversely affect Subscriber; provided, however, the Parties agree that for the purposes of this Agreement, Available Funds (as defined in the Contribution Agreement) of at least $400 million shall not be deemed to
materially adversely affect Subscriber) by the applicable party or parties thereto, and the closing of the Transactions shall occur, in accordance with the terms of the Contribution Agreement; and 

(ii)    there shall not be any law or order of any governmental authority having jurisdiction (except for any such order
issued in connection with a proceeding action instituted by Subscriber or any of its affiliates) restraining, enjoining or otherwise prohibiting or making illegal the consummation of the transactions contemplated by this Subscription Agreement. 

(b)    In addition to the conditions set forth in Section 3(a), the obligation of Subscriber to
consummate the Closing is subject to the satisfaction on the Closing Date, or the waiver by Subscriber, of the following conditions: 

(i)     the representations and warranties of the Issuer set forth in Section 4 shall be true
and correct in all material respects at and as of the Closing Date (other than those representations and warranties expressly made as of an earlier date, which shall be true and correct in all material respects as of such earlier date); 

(ii)    the Issuer shall have performed and complied in all material respects with all covenants, taken as a whole,
required by this Subscription Agreement to be performed or complied with by it prior to the Closing, except where the failure of such performance or compliance would not or would not reasonably be expected to prevent, materially delay, or materially
impair the ability of Issuer to consummate the Closing; and 

  
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 (iii)    the Contribution Agreement shall not have been amended to
materially adversely affect Subscriber; it being acknowledged that any amendment to increase the Contribution Price (as defined in the Contribution Agreement) shall be deemed to materially adversely affect Subscriber. 

(c)    In addition to the conditions set forth in Section 3(a), the obligation of the Issuer to
consummate the Closing is subject to the satisfaction on the Closing Date, or the waiver by the Issuer, of the following condition: the representations and warranties of Subscriber set forth in Section 5 shall be true and
correct in all material respects at and as of the Closing Date (other than those representations and warranties expressly made as of an earlier date, which shall be true and correct in all material respects as of such earlier date). 

4.     Issuer Representations and Warranties. The Issuer represents and warrants to Subscriber that: 

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

(b)    The Acquired Shares have been duly authorized and, when issued and delivered to Subscriber against full payment for
the Acquired Shares in accordance with the terms of this Subscription Agreement and registered with the Transfer Agent, the Acquired 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 Issuer’s certificate of incorporation (the “Certificate of Incorporation”) and bylaws (“Bylaws”) or under the
laws of the State of Delaware. 
 (c)    This Subscription Agreement has been duly authorized, executed and delivered by
the Issuer and is enforceable against it in accordance with its terms, except as may be limited or otherwise affected by (i) bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the
rights of creditors generally, and (ii) principles of equity, whether considered at law or equity. 
 (d)    The
execution, delivery and performance of this Subscription Agreement, including the issuance and sale of the Acquired Shares and the consummation of the other transactions contemplated hereby, 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 properties or assets of the Issuer pursuant to the terms of (i) any indenture,
mortgage, deed of trust, loan agreement, lease, license or other agreement or instrument to which the Issuer is a party or by which the Issuer is bound or to which any of its property or assets is subject; (ii) the organizational documents of
the Issuer; or (iii) any statute or any judgment, order, rule or regulation of any court or governmental agency or body, domestic or foreign, having jurisdiction over the Issuer or any of its properties that, in the case of clauses (i) and
(iii), would reasonably be expected to have a material adverse effect on the business, properties, assets, liabilities, operations, condition (including financial condition), stockholders’ equity or results of operations of the Issuer or
materially and adversely affect the validity of the Acquired Shares or the legal authority or ability of the Issuer to perform in any material respects its obligations hereunder (a “Material Adverse Effect”). 

  
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 (e)    Other than rights relating to the Issuer’s Class B
common stock, par value $0.0001 per share (the “Class B Shares”), all of which have been or will be waived with respect to the Transactions, pursuant to the terms of the Certificate of Incorporation, there are no
securities or instruments issued by or to which the Issuer is a party containing anti-dilution or similar provisions that will be triggered by the issuance of (i) the Acquired Shares or (ii) the Class A Shares to be issued in
connection with the PIPE Transactions. 
 (f)    The Issuer is not in default or violation (and no event has occurred
which, with notice or the lapse of time or both, would constitute a default or violation) of any term, condition or provision of (i) the organizational documents of the Issuer, (ii) any loan or credit agreement, note, bond, mortgage,
indenture, lease or other agreement, permit, franchise or license to which, as of the date of this Subscription Agreement, the Issuer is a party or by which the Issuer’s properties or assets are bound or (iii) any statute or any judgment,
order, rule or regulation of any court or governmental agency or body, domestic or foreign, having jurisdiction over the Issuer or any of its properties, except, in the case of clauses (ii) and (iii), for defaults or violations that have not
had and would not be reasonably likely to have, individually or in the aggregate, a Material Adverse Effect. 

(g)    The Issuer is not required to obtain any consent, waiver, authorization or order of, give any notice to, or make
any filing or registration with, any court or other federal, state, local or other governmental authority, self-regulatory organization or other person in connection with the execution, delivery and performance by the Issuer of this Subscription
Agreement (including, without limitation, the issuance of the Acquired Shares), other than (i) the filing with the Securities and Exchange Commission (the “Commission”) of the Registration Statement (as defined below), (ii)
filings required by applicable state securities laws, (iii) the filing of a Notice of Exempt Offering of Securities on Form D with the Commission under Regulation D of the Securities Act, (iv) those required by NASDAQ, including with
respect to obtaining approval of the Issuer’s stockholders, and (v) the failure of which to obtain would not be reasonably likely to have, individually or in the aggregate, a Material Adverse Effect. 

(h)    As of the date of this Subscription Agreement, the authorized capital stock of the Issuer consists of 220,000,000
shares of common stock of the Issuer, par value $0.0001 per share (“Common Stock”), including (x) 200,000,000 Class A Shares and (y) 20,000,000 Class B Shares, and 1,000,000 shares of preferred stock of the Issuer,
par value $0.0001 per share (“Preferred Stock”). As of August 6, 2018: (i) 37,732,112 Class A Shares, 9,433,028 Class B Shares, and no shares of Preferred Stock were issued and outstanding; (ii) 18,941,651
warrants (the “Warrants”), each entitling the holder thereof to purchase one Class A Share at an exercise price of $11.50 per Class A Share were issued and outstanding; and (iii) no shares of Common Stock were subject
to issuance upon exercise of outstanding options.
 (i)    The Issuer has not received any written communication from a
governmental entity that alleges that the Issuer is not in compliance with or is in default or violation of any applicable law, except where such non-compliance, default or violation would not, individually or
in the aggregate, be reasonably likely to have a Material Adverse Effect. 

  
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 (j)    The issued and outstanding Class A Shares are registered
pursuant to Section 12(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and are listed for trading on NASDAQ under the symbol “KAAC.” There is no suit, action, proceeding or investigation
pending or, to the Issuer’s knowledge, threatened against the Issuer by NASDAQ or the Commission with respect to any intention by such entity to deregister the Class A Shares or prohibit or terminate the listing of the Class A Shares
on NASDAQ. The Issuer has taken no action that is designed to terminate the registration of the Class A Shares under the Exchange Act. 

(k)    Assuming the accuracy of Subscriber’s representations and warranties set forth in
Section 5 of this Subscription Agreement, no registration under the Securities Act is required for the offer and sale of the Acquired Shares by the Issuer to Subscriber. 

(l)    Neither the Issuer nor any person acting on its behalf has engaged or will engage in any form of general
solicitation or general advertising (within the meaning of Regulation D of the Securities Act) in connection with any offer or sale of the Acquired Shares. 

(m)    The Issuer has made available to Subscriber (including via the Commission’s EDGAR system) a copy of each form,
report, statement, schedule, prospectus, proxy, registration statement and other document, if any, filed by the Issuer with the Commission since its initial registration of the Class A Shares (the “SEC Documents”). As of their
respective filing dates, the SEC Documents complied in all material respects with the requirements of the Exchange Act applicable to the Issuer and the rules and regulations of the Commission promulgated thereunder applicable to the SEC Documents.
None of the SEC Documents filed under the Exchange Act contained, when filed or, if amended, as of the date of such amendment with respect to those disclosures that are amended, any untrue statement of a material fact or omitted to state a material
fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading; provided, that the Issuer makes no such representation or warranty with respect to any
information relating to the Contributed Companies or any of its affiliates included in any SEC Document or filed as an exhibit thereto. The Issuer has timely filed each report, statement, schedule, prospectus, and registration statement that the
Issuer was required to file with the Commission since its inception. There are no material outstanding or unresolved comments in comment letters from the Commission Staff with respect to any of the SEC Documents. 

(n)    Except for such matters as have not had and would not be reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect, there is no proceeding pending, or, to the Issuer’s knowledge, threatened against the Issuer or any judgment, decree, injunction, ruling or order of any governmental entity or arbitrator outstanding against
the Issuer. 
 (o)    Except for placement fees payable to each Financial Advisor (as defined herein), the Issuer has
not paid, and is not obligated to pay, any brokerage, finder’s or other fee or commission in connection with its issuance and sale of the Acquired Shares, including, for the avoidance of doubt, any fee or commission payable to any stockholder
or affiliate of the Issuer. 
 (p)    Except as provided in this Subscription Agreement, the Other Subscription
Agreements and the Private PIPE Subscription Agreements, none of the Issuer, its subsidiaries or 

  
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any of their affiliates, nor any person acting on their behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, under
circumstances that would require registration of the issuance of any of the Acquired Shares under the Securities Act, whether through integration with prior offerings or otherwise. 

(q)    The Issuer and its board of directors (the “Board”) have taken all necessary action, if any, in
order to render inapplicable any control share acquisition, interested shareholder, business combination, poison pill (including, without limitation, any distribution under a rights agreement) or other similar anti-takeover provision under the
Certificate of Incorporation, Bylaws or other organizational documents or the laws of the jurisdiction of its formation which is or could become applicable to Subscriber as a result of the Issuer’s issuance of the Acquired Shares and
Subscriber’s ownership of the Acquired Shares. The Issuer has not adopted a shareholder rights plan or similar arrangement relating to accumulations of beneficial ownership of shares of Common Stock or a change in control of the Issuer or any
of its subsidiaries. 
 (r)    Neither the Issuer nor any of its subsidiaries has taken any steps to seek protection
pursuant to any law or statute relating to bankruptcy, insolvency, reorganization, receivership, liquidation or winding up, nor does the Issuer or any subsidiary have any knowledge or reason to believe that any of their respective creditors intend
to initiate involuntary bankruptcy proceedings or any actual knowledge of any fact which would reasonably lead a creditor to do so. The Issuer and its subsidiaries, individually and on a consolidated basis, are not as of the date hereof, and after
giving effect to the transactions contemplated hereby to occur at the Closing, will not be Insolvent (as defined below). For purposes hereof, “Insolvent” means, with respect to any person, (i) the present fair saleable value of
such person’s assets is less than the amount required to pay such person’s total indebtedness, (ii) such person is unable to pay its debts and liabilities, subordinated, contingent or otherwise, as such debts and liabilities become
absolute and matured, (iii) such person intends to incur or believes that it will incur debts that would be beyond its ability to pay as such debts mature or (iv) such person has unreasonably small capital with which to conduct the
business in which it is engaged as such business is now conducted and is proposed to be conducted. 
 (s)    The
operations and activities of the Issuer and its subsidiaries, affiliates, or agents are and have been conducted at all times in compliance with, as applicable to the Issuer or its subsidiaries, affiliates, or agents: (i) anti-money laundering
compliance requirements, including relevant recordkeeping and reporting requirements, such as, in the United States, the Currency and Foreign Transactions Reporting Act of 1970 (also known as the Bank Secrecy Act), as amended, and the regulations of
the U.S. Treasury Department’s Financial Crimes Enforcement Network; (ii) criminal and other prohibitions on engaging in money laundering or terrorism financing; and (iii) any related or similar rules, regulations or guidelines
issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering Laws”). No action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving
the Issuer or any of its subsidiaries, affiliates, or agents with respect to the Anti-Money Laundering Laws is pending or, to the actual knowledge of the Issuer or any of its subsidiaries, affiliates, or agents, the subject of investigation or
threatened. 

  
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 (t)    None of the Issuer nor any of its subsidiaries, affiliates, or
agents, or to the actual knowledge of the Issuer, the directors, officers, agents, employees or affiliates of the Issuer, is currently the target of, or otherwise subject to restrictions under, any sanctions administered or enforced by the United
States, including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”) or the U.S. Department of State; the United Nations Security Council; Canada; the European Union; the United
Kingdom; or other government authority with jurisdiction over the parties (collectively, “Sanctions”). None of the Issuer or any of its subsidiaries, affiliates, or agents is located, organized or resident in a country or territory
that is the subject or target of country- or territory-wide Sanctions, including, without limitation, Crimea, Cuba, Iran, North Korea or Syria (each, a “Sanctioned Country”). The Issuer and its subsidiaries, affiliates, or agents
will not directly or indirectly use the proceeds from the Acquired Shares, or lend, or knowingly contribute or otherwise make available such proceeds: (i) to fund or facilitate any activities of or business with any person that is the target
of, or otherwise subject to restrictions under, any Sanctions; (ii) to fund or facilitate any activities of or business in any Sanctioned Country; or (iii) in any other manner that will result in a violation by any person (including any
person participating in the transaction, whether as underwriter, initial purchaser, advisor, investor or otherwise) of Sanctions. In the past five years, none of the Issuer nor any of its subsidiaries, affiliates, or agents have engaged in or are
now engaged in any dealings or transactions: (i) with, or involving the interests or property of, any person that, at the time of the dealing or transaction, was or is subject to restrictions imposed by any Sanctions or located, organized or
resident in a Sanctioned Country; or (ii) that are otherwise prohibited by Sanctions. 
 (u)    The Issuer has not
entered into any side letter or similar agreement with any investor in connection with such investor’s direct or indirect investment in the Issuer other than (i) the Contribution Agreement and the other agreements contemplated thereby,
(ii) the Other Subscription Agreements and (iii) the Private PIPE Subscription Agreements, and, in the case of clauses (ii) and (iii), such agreements have not been amended in any material respect following the date of this Agreement.

 5.    Subscriber Representations and Warranties. Subscriber represents and warrants that: 

(a)    Subscriber has been duly formed or incorporated and is validly existing in good standing under the laws of its
jurisdiction of incorporation or formation, with power and authority to enter into, deliver and perform its obligations under this Subscription Agreement. 

(b)    This Subscription Agreement has been duly authorized, executed and delivered by Subscriber and is enforceable
against it in accordance with its terms, except as may be limited or otherwise affected by (i) bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the rights of creditors generally,
and (ii) principles of equity, whether considered at law or equity. 
 (c)    The execution, delivery and
performance by Subscriber of this Subscription Agreement, including the consummation of the transactions contemplated hereby, 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 

  
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encumbrance upon any of the property or assets of Subscriber 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 Subscriber or any of its subsidiaries is a party or by which Subscriber or any of its subsidiaries is bound or to which any of the property or assets of Subscriber or any of its subsidiaries is subject;
(ii) the organizational documents of Subscriber; or (iii) any statute or any judgment, order, rule or regulation of any court or governmental agency or body, domestic or foreign, having jurisdiction over Subscriber or any of its
subsidiaries or any of their respective properties that, in the case of clauses (i) and (iii), would reasonably be expected to have a material adverse effect on the legal authority or ability of the Subscriber to perform in any material
respects its obligations hereunder. 
 (d)    Subscriber (i) is a “qualified institutional buyer” (as
defined in Rule 144A under the Securities Act) or an institutional “accredited investor” (within the meaning of Rule 501(a) under the Securities Act) satisfying the applicable requirements set forth on Schedule A, (ii) is
acquiring the Acquired Shares only for its own account and not for the account of others, or if Subscriber is subscribing for the Acquired Shares as a fiduciary or agent for one or more investor accounts, each owner of such account is a
“qualified institutional buyer” (as defined in Rule 144A under the Securities Act) or an institutional “accredited investor” (within the meaning of Rule 501(a) under the Securities Act) and Subscriber has full investment
discretion with respect to each such account, and the full power and authority to make the acknowledgements, representations and agreements herein on behalf of each owner of each such account, and (iii) is not acquiring the Acquired Shares 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). Subscriber is not an entity
formed for the specific purpose of acquiring the Acquired Shares, unless such newly formed entity is an entity in which all of the equity owners are “accredited investors” (within the meaning of Rule 501(a) under the Securities Act. 

(e)    Subscriber understands that the Acquired Shares are being offered in a transaction not involving any public
offering within the meaning of the Securities Act and that the Acquired Shares have not been registered under the Securities Act. Subscriber understands that the Acquired Shares may not be resold, transferred, pledged or otherwise disposed of by
Subscriber absent an effective registration statement under the Securities Act, except (i) to the Issuer or a subsidiary thereof, (ii) to non-U.S. persons pursuant to offers and sales that occur
outside the United States within the meaning of Regulation S under the Securities Act or (iii) pursuant to another applicable exemption from the registration requirements of the Securities Act, and, in each of cases (i) and (iii), in
accordance with any applicable securities laws of the states and other jurisdictions of the United States, and that any certificates or book entry notation representing the Acquired Shares shall contain a legend to such effect. Subscriber
acknowledges that the Acquired Shares will not be eligible for resale pursuant to Rule 144A promulgated under the Securities Act. Subscriber understands and agrees that the Acquired Shares will be subject to transfer restrictions and, as a result of
these transfer restrictions, Subscriber may not be able to readily resell the Acquired Shares and may be required to bear the financial risk of an investment in the Acquired Shares for an indefinite period of time. Subscriber understands that it has
been advised to consult legal counsel prior to making any offer, resale, pledge or transfer of any of the Acquired Shares. 

  
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 (f)    Subscriber understands and agrees that Subscriber is purchasing
the Acquired Shares directly from the Issuer. Subscriber further acknowledges that there have been no representations, warranties, covenants and agreements made to Subscriber by the Issuer or any of its officers, directors or representatives,
expressly or by implication, other than those representations, warranties, covenants and agreements included in this Subscription Agreement. 

(g)    Subscriber represents and warrants that its acquisition and holding of the Acquired Shares will not constitute or
result in a non-exempt prohibited transaction under Section 406 of the Employee Retirement Income Security Act of 1974, as amended, Section 4975 of the Internal Revenue Code of 1986, as amended (the
“Code”), or any applicable similar law. 
 (h)    In making its decision to purchase the Acquired
Shares, Subscriber represents that it has relied solely upon independent investigation made by Subscriber. Subscriber acknowledges and agrees that Subscriber has received such information as Subscriber deems necessary in order to make an investment
decision with respect to the Acquired Shares, including with respect to the Issuer and the Transactions. Subscriber represents and agrees that Subscriber and Subscriber’s professional advisor(s), if any, have had the full opportunity to ask
such questions, receive such answers and obtain such information as Subscriber and such Subscriber’s professional advisor(s), if any, have deemed necessary to make an investment decision with respect to the Acquired Shares. Subscriber
acknowledges and agrees that it has not relied on any Financial Advisor or any Financial Advisor’s affiliates with respect to its decision to purchase the Acquired Shares. 

(i)    Subscriber became aware of this offering of the Acquired Shares solely by means of direct contact between
Subscriber and the Issuer or by means of contact from Citigroup Global Markets Inc., Barclays Capital Inc. or Credit Suisse Securities (USA) LLC, each acting as financial advisor for the Issuer (each, a “Financial Advisor”), and the
Acquired Shares were offered to Subscriber solely by direct contact between Subscriber and the Issuer or by contact between Subscriber and a Financial Advisor. Subscriber did not become aware of this offering of the Acquired Shares, nor were the
Acquired Shares offered to Subscriber, by any other means. Subscriber acknowledges that the Issuer represents and warrants that the Acquired Shares (i) were not offered by any form of general advertising or, to its knowledge, general
solicitation and (ii) to its knowledge, 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. 

(j)    Subscriber acknowledges that it is aware that there are substantial risks incident to the purchase and ownership of
the Acquired Shares. 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 Acquired Shares, and Subscriber has sought such accounting, legal and tax
advice as Subscriber has considered necessary to make an informed investment decision. 
 (k)    Subscriber represents
and acknowledges that Subscriber has adequately analyzed and fully considered the risks of an investment in the Acquired Shares and determined that the Acquired Shares are a suitable investment for Subscriber and that Subscriber is able at this time
and in the foreseeable future to bear the economic risk of a total loss of Subscriber’s investment in the Issuer. Subscriber acknowledges specifically that a possibility of total loss exists. 

  
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 (l)    Subscriber understands and agrees that no federal or state agency
has passed upon or endorsed the merits of the offering of the Acquired Shares or made any findings or determination as to the fairness of this investment. 

(m)    Subscriber represents and warrants that Subscriber is not (i) a person or entity named on the List of
Specially Designated Nationals and Blocked Persons, the Executive Order 13599 List, the Foreign Sanctions Evaders List, or the Sectoral Sanctions Identification List, each of which is administered by OFAC, or any other Executive Order issued by the
President of the United States and administered by OFAC (collectively “OFAC Lists”), (ii) owned or controlled by, or acting on behalf of, a person, that is named on an OFAC List; (iii) organized, incorporated, established,
located, resident or born in, or a citizen, national, or the government, including any political subdivision, agency, or instrumentality thereof, of any Sanctioned Country, or any other country or territory embargoed or subject to substantial trade
restrictions by the United States, (iv) a Designated National as defined in the Cuban Assets Control Regulations, 31 C.F.R. Part 515, or (v) a non-U.S. shell bank or providing banking services
indirectly to a non-U.S. shell bank. Subscriber agrees to provide law enforcement agencies, if requested thereby, such records as required by applicable law, provided that Subscriber is permitted to do so
under applicable law. Subscriber represents that if it is a financial institution subject to the Bank Secrecy Act (31 U.S.C. section 5311 et seq.) (the “BSA”), as amended by the USA PATRIOT Act of 2001 (the “PATRIOT
Act”), and its implementing regulations (collectively, the “BSA/PATRIOT Act”), that Subscriber maintains policies and procedures reasonably designed to comply with applicable obligations under the BSA/PATRIOT Act.
Subscriber also represents that, to the extent required, it maintains policies and procedures reasonably designed to ensure compliance with OFAC-administered sanctions programs, including for the screening of its investors against the OFAC Lists.
Subscriber further represents and warrants that, to the extent required, it maintains policies and procedures reasonably designed to ensure that the funds held by Subscriber and used to purchase the Acquired Shares were legally derived. 

(n)    If Subscriber is an employee benefit plan that is subject to Title I of the Employee Retirement Income Security Act
of 1974, as amended (“ERISA”), a plan, an individual retirement account or other arrangement that is subject to section 4975 of the Code or an employee benefit plan that is a governmental plan (as defined in section 3(32) of ERISA),
a church plan (as defined in section 3(33) of ERISA), a non-U.S. plan (as described in section 4(b)(4) of ERISA) or other plan that is not subject to the foregoing but may be subject to provisions under any
other federal, state, local, non-U.S. or other laws or regulations that are similar to such provisions of ERISA or the Code (collectively, “Similar Laws”), or an entity whose underlying assets
are considered to include “plan assets” of any such plan, account or arrangement (each, a “Plan”) subject to the fiduciary or prohibited transaction provisions of ERISA or section 4975 of the Code, Subscriber represents
and warrants that (i) neither Issuer, nor any of its respective affiliates (the “Transaction Parties”) has acted as the Plan’s fiduciary, or has been relied on for advice, with respect to its decision to acquire and
hold the Acquired Shares, and none of the Transaction Parties shall at any time be relied upon as the Plan’s fiduciary with respect to any decision to acquire, continue to hold or transfer the Acquired

  
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Shares; (ii) the decision to invest in the Acquired Shares has been made at the recommendation or direction of an “independent fiduciary” (“Independent Fiduciary”)
within the meaning of US Code of Federal Regulations 29 C.F.R. section 2510.3 21(c), as amended from time to time (the “Fiduciary Rule”) who is (1) independent of the Transaction Parties; (2) is capable of evaluating
investment risks independently, both in general and with respect to particular transactions and investment strategies (within the meaning of the Fiduciary Rule); (3) is a fiduciary (under ERISA and/or section 4975 of the Code) with respect to
Subscriber’s investment in the Acquired Shares and is responsible for exercising independent judgment in evaluating the investment in the Acquired Shares; and (4) is aware of and acknowledges that (A) none of the Transaction Parties
is undertaking to provide impartial investment advice, or to give advice in a fiduciary capacity, in connection with the purchaser’s or transferee’s investment in the Acquired Shares, and (B) the Transaction Parties have a financial
interest in the purchaser’s investment in the Acquired Shares on account of the fees and other remuneration they expect to receive in connection with transactions contemplated by this Subscription Agreement. 

(o)    Subscriber has, and at the Closing will have, sufficient funds to pay the Purchase Price pursuant to
Section 2(b). 
 6.    Registration Rights. 

(a)    The Issuer agrees that, within thirty (30) calendar days after the closing of the Contribution Agreement (the
“Filing Date”), the Issuer will file with the Commission (at the Issuer’s sole cost and expense) a registration statement registering the resale of the Acquired Shares (the “Registration Statement”), and the
Issuer shall use its commercially reasonable efforts to have the Registration Statement declared effective as soon as practicable after the filing thereof, but no later than the earlier of (i) the 90th calendar day (or 120th calendar day if the
Commission notifies the Issuer that it will “review” the Registration Statement) following the Closing and (ii) the tenth (10th) business day after the date the Issuer is notified
(orally or in writing, whichever is earlier) by the Commission that the Registration Statement will not be “reviewed” or will not be subject to further review (such earlier date, the “Effectiveness Date”); provided,
however, that the Issuer’s obligations to include the Acquired Shares in the Registration Statement are contingent upon Subscriber furnishing in writing to the Issuer such information regarding Subscriber, the securities of the Issuer held
by Subscriber and the intended method of disposition of the Acquired Shares as shall be reasonably requested by the Issuer to effect the registration of the Acquired Shares, and Subscriber shall execute such documents in connection with such
registration as the Issuer may reasonably request that are customary of a selling stockholder in similar situations, including providing that the Issuer shall be entitled to postpone and suspend the effectiveness or use of the Registration Statement
during any customary blackout or similar period or as permitted hereunder; provided that Subscriber shall not in connection with the foregoing be required to execute any lock-up or similar agreement or
otherwise be subject to any contractual restriction with the Issuer on the ability to transfer the Acquired Shares. Any failure by the Issuer to file the Registration Statement by the Filing Date or to effect such Registration Statement by the
Effectiveness Date shall not otherwise relieve the Issuer of its obligations to file or effect the Registration Statement as set forth above in this Section 6. 

  
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 (b)    The Issuer further agrees that, in the event that (i) the
Registration Statement has not been declared effective by the Commission by the Effectiveness Date due to the Issuer failing to use commercially reasonable efforts, (ii) after such Registration Statement is declared effective by the Commission,
(A) such Registration Statement ceases for any reason (including by reason of a stop order, or the Issuer’s failure to update the Registration Statement) to remain continuously effective as to all Acquired Shares for which it is required
to be effective or (B) Subscriber is not permitted to utilize the Registration Statement to resell the Acquired Shares (in each case of (A) and (B), (x) other than within the time period(s) permitted by this Subscription Agreement and
(y) excluding by reason of a post-effective amendment required in connection with the Issuer’s filing of an amendment thereto (a “Special Grace Period”) (which Special Grace Period shall not be treated as a Registration
Default (as defined below)), or (iii) after the date one year following the Closing Date, and only in the event the Registration Statement is not effective or available to sell all Acquired Shares, the Issuer fails to file with the Commission
any required reports under Section 13 or Section 15(d) of the Exchange Act such that it is not in compliance with Rule 144(c)(1) (or Rule 144(i)(2), if applicable), as a result of which Subscribers who are not affiliates of the Issuer are
unable to sell the Acquired Shares without restriction under Rule 144 (“Rule 144”) (or any successor thereto) (each such event referred to in clauses (i) through (ii), a “Registration Default” and, for purposes
of such clauses, the date on which such Registration Default occurs, a “Default Date”), then in addition to any other rights Subscriber may have hereunder or under applicable law, on each such Default Date and on each monthly
anniversary of each such Default Date (if the applicable Registration Default shall not have been cured by such anniversary date) until the applicable Registration Default is cured the Issuer shall pay to each Subscriber an amount in cash, as
liquidated damages and not as a penalty (“Liquidated Damages”), equal to 0.50% of the aggregate Purchase Price paid by Subscriber pursuant to this Subscription Agreement for any Acquired Shares which may not be disposed by
Subscriber without restriction on the Default Date; provided, however, that if Subscriber fails to provide the Issuer with any information requested by the Issuer that is required to be provided in such Registration Statement with
respect to Subscriber as set forth herein, then, for purposes of this Section 6, the Filing Date for a Registration Statement with respect to Subscriber shall be extended until two (2) business days following the date
of receipt by the Issuer of such required information from Subscriber; and in no event shall the Issuer be required hereunder to pay to Subscriber pursuant to this Subscription Agreement an aggregate amount that exceeds 5.0% of the aggregate
Purchase Price paid by Subscriber for any Acquired Shares which may not be disposed by Subscriber without restriction as of the Effectiveness Date. The Liquidated Damages pursuant to the terms hereof shall apply on a daily pro-rata basis for any portion of a month prior to the cure of a Registration Default following the Effectiveness Date. The Issuer shall deliver the cash payment to Subscriber with respect to any Liquidated Damages
by the fifth (5th) business day after the date payable. If the Issuer fails to pay said cash payment to Subscriber in full by the fifth business day after the date payable, the Issuer will pay
interest thereon at a rate of 5.0% per annum (or such lesser maximum amount that is permitted to be paid by applicable law, and calculated on the basis of a year consisting of 360 days) to such Subscriber, accruing daily from the date such
Liquidated Damages are due until such amounts, plus all such interest thereon, are paid in full. Notwithstanding the foregoing, nothing shall preclude any Subscriber from pursuing or obtaining any available remedies at law, specific performance or
other equitable relief with respect to this Section 6 in accordance with applicable law. The parties agree that notwithstanding anything to the contrary herein, no Liquidated

  
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Damages shall be payable to Subscriber with respect to any period during which all of such Subscriber’s Acquired Shares may be sold by Subscriber without volume or manner of sale
restrictions under Rule 144 and the Issuer is in compliance with the current public information requirements under Rule 144(c)(1) (or Rule 144(i)(2), if applicable). 

(c)    In the case of the registration, qualification, exemption or compliance effected by the Issuer pursuant to this
Subscription Agreement, the Issuer shall, upon reasonable request, inform Subscriber as to the status of such registration, qualification, exemption and compliance. At its expense the Issuer shall: 

(i)    except for such times as the Issuer is permitted hereunder to suspend the use of the prospectus forming part of a
Registration Statement, use its commercially reasonable efforts to keep such registration, and any qualification, exemption or compliance under state securities laws which the Issuer determines to obtain, continuously effective with respect to
Subscriber, and to keep the applicable Registration Statement or any subsequent shelf registration statement free of any material misstatements or omissions, until the earlier of the following: (i) Subscriber ceases to hold any Acquired Shares,
(ii) the date all Acquired Shares held by Subscriber may be sold without restriction under Rule 144, including without limitation, any volume and manner of sale restrictions which may be applicable to affiliates under Rule 144 and without the
requirement for the Issuer to be in compliance with the current public information required under Rule 144(c)(1) (or Rule 144(i)(2), if applicable), or (iii) two (2) years from the Effective Date of the Registration Statement. The period
of time during which the Issuer is required hereunder to keep a Registration Statement effective is referred to herein as the “Registration Period”; 

(ii)    advise Subscriber within five (5) business days: 

(1)    when a Registration Statement or any amendment thereto has been filed with the Commission and when such
Registration Statement or any post-effective amendment thereto has become effective; 
 (2)    of any request by the
Commission for amendments or supplements to any Registration Statement or the prospectus included therein or for additional information; 

(3)    of the issuance by the Commission of any stop order suspending the effectiveness of any Registration Statement or
the initiation of any proceedings for such purpose; 
 (4)    of the receipt by the Issuer of any notification with
respect to the suspension of the qualification of the Acquired Shares included therein for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and 

(5)    subject to the provisions in this Subscription Agreement, of the occurrence of any event that requires the making
of any changes in any Registration Statement or prospectus so that, as of such date, the statements therein are not misleading and do not omit to state a material fact required to be stated therein or necessary to make the statements therein (in the
case of a prospectus, in the light of the circumstances under which they were made) not misleading. 

  
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 Notwithstanding anything to the contrary set forth herein, the Issuer shall not, when so advising Subscriber
of such events, provide Subscriber with any material, nonpublic information regarding the Issuer other than to the extent that providing notice to Subscriber of the occurrence of the events listed in (1) through (5) above constitutes
material, nonpublic information regarding the Issuer; 
 (iii)    use its commercially reasonable efforts to obtain the
withdrawal of any order suspending the effectiveness of any Registration Statement as soon as reasonably practicable; 

(iv)    upon the occurrence of any event contemplated above, except for such times as the Issuer is permitted hereunder
to suspend, and has suspended, the use of a prospectus forming part of a Registration Statement, the Issuer shall use its commercially reasonable efforts to as soon as reasonably practicable prepare a post-effective amendment to such Registration
Statement or a supplement to the related prospectus, or file any other required document so that, as thereafter delivered to purchasers of the Acquired Shares included therein, such prospectus will not include any untrue statement of a material fact
or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; 

(v)    use its commercially reasonable efforts to cause all Acquired Shares to be listed on each securities exchange or
market, if any, on which the Class A Shares issued by the Issuer have been listed; and 
 (vi)    use its
commercially reasonable efforts to take all other steps necessary to effect the registration of the Acquired Shares contemplated hereby and to enable Subscriber to sell the Acquired Shares under Rule 144. 

(d)    Notwithstanding anything to the contrary in this Subscription Agreement, the Issuer shall be entitled to delay or
postpone the effectiveness of the Registration Statement, and from time to time to require Subscriber not to sell under the Registration Statement or to suspend the effectiveness thereof, if the negotiation or consummation of a transaction by the
Issuer or its subsidiaries is pending or an event has occurred, which negotiation, consummation or event that the Board reasonably believes, upon the advice of legal counsel, would require additional disclosure by the Issuer in the Registration
Statement of material information that the Issuer has a bona fide business purpose for keeping confidential and the non-disclosure of which in the Registration Statement would be expected, in the reasonable
determination of the Board, upon the advice of legal counsel, to cause the Registration Statement to fail to comply with applicable disclosure requirements (each such circumstance, a “Suspension Event”); provided,
however, that the Issuer may not delay or suspend the Registration Statement on more than two occasions or for more than sixty (60) consecutive calendar days, or more than one hundred and twenty (120) total calendar days, in each
case during any twelve-month period. Upon receipt of any written notice from the Issuer of the happening of any Suspension Event during the period that the Registration Statement is effective or if as a result of a Suspension Event the Registration

  
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Statement or related prospectus contains any untrue statement of a material fact or omits to state any material fact required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they were made (in the case of the prospectus) not misleading, Subscriber agrees that (i) it will immediately discontinue offers and sales of the Acquired Shares under the Registration Statement
(excluding, for the avoidance of doubt, sales conducted pursuant to Rule 144) until Subscriber receives copies of a supplemental or amended prospectus (which the Issuer agrees to promptly prepare) that corrects the misstatement(s) or omission(s)
referred to above and receives notice that any post-effective amendment has become effective or unless otherwise notified by the Issuer that it may resume such offers and sales, and (ii) it will maintain the confidentiality of any information
included in such written notice delivered by the Issuer unless otherwise required by law or subpoena. If so directed by the Issuer, Subscriber will deliver to the Issuer or, in Subscriber’s sole discretion destroy, all copies of the prospectus
covering the Acquired Shares in Subscriber’s possession; provided, however, that this obligation to deliver or destroy all copies of the prospectus covering the Acquired Shares shall not apply (i) to the extent Subscriber is
required to retain a copy of such prospectus (a) in order to comply with applicable legal, regulatory, self-regulatory or professional requirements or (b) in accordance with a bona fide pre-existing
document retention policy or (ii) to copies stored electronically on archival servers as a result of automatic data back-up. 

(e)    Indemnification. 

(i)    The Issuer agrees to indemnify, except if such transaction is consummated during a Suspension Event, to the extent
permitted by law the Subscriber, its directors and officers and agents and each person who controls the Subscriber (within the meaning of the Securities Act) against all losses, claims, damages, liabilities, and expenses (including attorneys’
fees) caused by any untrue or alleged untrue statement of material fact contained in any Registration Statement, prospectus included in any Registration Statement (“Prospectus”) or preliminary Prospectus or any amendment thereof or
supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, except insofar as the same are caused by or contained in any information furnished in
writing to the Issuer by such Subscriber expressly for use therein. 
 (ii)    In connection with any Registration
Statement in which a Subscriber is participating, such Subscriber shall furnish to the Issuer in writing such information and affidavits as the Issuer reasonably requests for use in connection with any such Registration Statement or Prospectus and,
to the extent permitted by law, shall indemnify the Issuer, its directors and officers and agents and each person who controls the Issuer (within the meaning of the Securities Act) against any losses, claims, damages, liabilities, and expenses
(including without limitation reasonable attorneys’ fees) resulting from any untrue statement of material fact contained in the Registration Statement, Prospectus, preliminary Prospectus, or any amendment thereof or supplement thereto or any
omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished in writing
by such Subscriber expressly for use therein; provided, however, that the liability of each such Subscriber shall be several and not joint and shall be in proportion to and limited to the net proceeds received by such Subscriber from
the sale of Acquired Shares pursuant to such Registration Statement. 

  
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 (iii)    Any person entitled to indemnification herein shall
(1) give prompt written notice to the indemnifying party of any claim with respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s right to indemnification hereunder to the
extent such failure has not prejudiced the indemnifying party) and (2) permit such indemnifying party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the
indemnifying party shall not be subject to any liability for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld). An indemnifying party who elects not to assume the defense of a
claim shall not be obligated to pay the fees and expenses of more than one (1) counsel for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of
interest may exist between such indemnified party and any other of such indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party, consent to the entry of any judgment or enter into any
settlement which cannot be settled in all respects by the payment of money (and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include as an unconditional term thereof the
giving by the claimant or plaintiff to such indemnified party of a release from all liability in respect to such claim or litigation. 

(iv)    The indemnification provided for under this Subscription Agreement shall remain in full force and effect
regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of securities. The Issuer and each Subscriber participating in an
offering also agrees to make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Issuer’s or such Subscriber’s indemnification is unavailable for any reason. 

(v)    If the indemnification provided under this Section 6(e) from the indemnifying party is
unavailable to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid
or payable by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other
relevant equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a
material fact or omission or alleged omission to state a material fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent,
knowledge, access to information and opportunity to correct or prevent such action. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set
forth in Sections 6(e)(i), (ii) and (iii) above, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to indemnification pursuant to this Section 6(e) from any person who was not guilty of such fraudulent misrepresentation.

  
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 7.    Termination. This Subscription Agreement shall terminate
and be void and of no further force and effect, and all rights and obligations of the parties hereunder shall terminate without any further liability on the part of any party in respect thereof, upon the earlier to occur of (a) such date and
time as the Contribution Agreement is terminated in accordance with its terms, (b) if any of the conditions to Closing set forth in Section 3 of this Subscription Agreement are not satisfied or waived on or prior to
the Closing and, as a result thereof, the transactions contemplated by this Subscription Agreement are not consummated at the Closing, or (c) the Outside Date (as defined in the Contribution Agreement); provided, that nothing herein will
relieve any party from liability for any willful breach hereof prior to the time of termination, and each party will be entitled to any remedies at law or in equity to recover losses, liabilities or damages arising from such breach. The Issuer shall
notify Subscriber of the termination of the Contribution Agreement promptly after the termination of such agreement. 

8.    Trust Account Waiver. Reference is made to the final prospectus of the Issuer, filed with the Commission
(File No. 333-216514) (the “IPO Prospectus”), and dated as of March 29, 2017. Subscriber hereby acknowledges that it has read the IPO Prospectus and understands that the Issuer has
established a trust account (the “Trust Account”) containing the proceeds of its initial public offering (the “IPO”) and from certain private placements occurring simultaneously with the IPO (including interest
accrued from time to time thereon) for the benefit of the Issuer’s public stockholders (the “Public Stockholders”) and certain other parties (including the underwriters of the IPO), and that, except as otherwise described in
the IPO Prospectus, the Issuer may disburse monies from the Trust Account only: (a) to the Public Stockholders in the event they elect to redeem their Issuer shares in connection with the consummation of the Issuer’s initial business
combination (as such term is used in the IPO Prospectus) (the “Business Combination”), (b) to the Public Stockholders if the Issuer fails to consummate a Business Combination within twenty-four (24) months after the
closing of the IPO, (c) with respect to any interest earned on the amounts held in the Trust Account, as necessary to pay taxes, if any, or (d) to the Issuer after or concurrently with the consummation of a Business Combination. For and in
consideration of the Issuer entering into this Subscription Agreement, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Subscriber hereby agrees on behalf of itself and its Representatives
that, notwithstanding anything to the contrary in this Subscription Agreement, it and its Representatives do not now and shall not at any time hereafter have any right, title, interest or claim of any kind in or to any monies in the Trust Account or
distributions therefrom, and shall not make any claim against the Trust Account (including any distributions therefrom), regardless of whether such claim arises as a result of, in connection with or relating in any way to this Subscription Agreement
or any other matter, and regardless of whether such claim arises based on contract, tort, equity or any other theory of legal liability (any and all such claims are collectively referred to hereafter as the “Released Claims”).
Subscriber, on behalf of itself and its Representatives, hereby irrevocably waives any Released Claims that Subscriber or its Representatives may have against the Trust Account now (including any distributions therefrom) or in the future as a result
of, or arising out of, any negotiations, contracts or agreements with the Issuer or its Representatives and will not seek recourse against the Trust Account (including any distributions therefrom) for any reason whatsoever (including for an alleged
breach of any agreement with the Issuer or its affiliates). Subscriber agrees and acknowledges that such irrevocable waiver is material to this Subscription Agreement and specifically relied upon by the Issuer and its affiliates to induce the Issuer
to enter in this Subscription Agreement, and 

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

9.    Issuer’s Covenants. 

(a)    Except as contemplated herein, Issuer, its subsidiaries, their respective affiliates shall not, and shall cause any
person acting on behalf of any of the foregoing to not, take any action or steps that would require registration of the issuance of any of the Acquired Shares under the Securities Act. 

(b)    With a view to making available to Subscriber the benefits of Rule 144 or any other similar rule or regulation of
the Commission that may at any time permit Subscriber to sell securities of the Issuer to the public without registration, the Issuer agrees, until the Acquired Shares are registered for resale under the Securities Act, to: 

(i)    make and keep public information available, as those terms are understood and defined in Rule 144; 

(ii)    file with the Commission in a timely manner all reports and other documents required of the Issuer under the
Securities Act and the Exchange Act so long as the Issuer remains subject to such requirements and the filing of such reports and other documents is required for the applicable provisions of Rule 144; and 

(iii)    furnish to Subscriber so long as it owns Acquired Shares, promptly upon request, (x) an electronic
statement by the Issuer, if true, that it has complied with the reporting requirements of Rule 144, the Securities Act and the Exchange Act, (y) an electronic copy of the most recent annual or quarterly report of the Issuer and such other
reports and documents so filed by the Issuer (if not available via the Commission’s EDGAR) and (z) such other information as may be reasonably requested to permit Subscriber to sell such securities pursuant to Rule 144 without
registration. 

  
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 (c)    The Issuer will use the proceeds from the sale of the Acquired
Shares and the shares issued and sold pursuant to the Other Subscription Agreements and the Private PIPE Subscription Agreements solely to finance the Transactions. 

(d)    The legend described in Section 2(d) shall be removed and the Issuer shall issue a
certificate without such legend to the holder of the Acquired Shares upon which it is stamped or issue to such holder by electronic delivery at the applicable balance account at The Depository Trust Company (“DTC”), if (i) such
Acquired Shares are registered for resale under the Securities Act, (ii) in connection with a sale, assignment or other transfer, such holder provides the Issuer with an opinion of counsel, in a form reasonably acceptable to the Issuer, to the
effect that such sale, assignment or transfer of the Acquired Shares may be made without registration under the applicable requirements of the Securities Act, or (iii) the Acquired Shares can be sold, assigned or transferred pursuant to Rule
144. The Issuer shall be responsible for the fees of its transfer agent and all DTC fees associated with such issuance. 

10.    Additional Subscriber Agreements. Subscriber hereby agrees that neither it, nor any person or entity acting
on its behalf or pursuant to any understanding with it, will engage in any Short Sales with respect to securities of the Issuer prior to the Closing. For purposes of this Section 10, “Short Sales” shall
include, without limitation, all “short sales” as defined in Rule 200 promulgated under Regulation SHO under the Exchange Act, and all types of direct and indirect stock pledges (other than pledges in the ordinary course of business as
part of prime brokerage arrangements), forward sale contracts, options, puts, calls, swaps, and similar arrangements (including on a total return basis), and sales and other transactions through non-U.S.
broker dealers or foreign regulated brokers. 
 11.    Miscellaneous. 

(a)    Subscriber acknowledges that the Issuer and others will rely on the acknowledgments, understandings, agreements,
representations and warranties contained in this Subscription Agreement. Prior to the Closing, Subscriber agrees to promptly notify the Issuer if any of the acknowledgments, understandings, agreements, representations and warranties of Subscriber
set forth herein are no longer accurate in all material respects. 
 (b)    Each of the Issuer and Subscriber is
entitled to rely upon this Subscription Agreement and is irrevocably authorized to produce this Subscription Agreement or a copy hereof to any interested party in any administrative or legal proceeding or official inquiry with respect to the matters
covered hereby. The Financial Advisors are entitled to rely upon the representations and warranties made by Subscriber in this Subscription Agreement. 

(c)    This Subscription Agreement and any of Subscriber’s rights and obligations hereunder may be assigned to any
fund or account managed by the same investment manager as the Subscriber, without the prior consent of the Issuer, provided that such assignee(s) agrees to be bound by the terms hereof. Upon such assignment by a Subscriber, the assignee(s) shall
become Subscriber hereunder and have the rights and obligations provided for herein to the extent of such assignment. Neither this Subscription Agreement nor any rights that may accrue to the Issuer hereunder or any of Issuer’s obligations may
be transferred or assigned. 

  
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 (d)    All the agreements made by each party hereto in this Subscription
Agreement shall survive only until the Closing; provided, that representations and warranties made by each party hereto in this Subscription Agreement shall survive for six (6) months following the Closing; and provided,
further, that the covenants in this Subscription Agreement that contemplate performance after the Closing or expressly by their terms survive the Closing shall survive the Closing in accordance with their respective terms or until fully
performed. 
 (e)    The Issuer may request from Subscriber such additional information as the Issuer may deem
reasonably necessary to evaluate the eligibility of Subscriber to acquire the Acquired Shares, and Subscriber shall provide such information as may be reasonably requested, to the extent readily available and to the extent consistent with its
internal policies and procedures. 
 (f)    This Subscription Agreement may not be modified, waived or terminated except
by an instrument in writing, signed by the party against whom enforcement of such modification, waiver, or termination is sought. 

(g)    This Subscription Agreement constitutes the entire agreement, and supersedes all other prior agreements,
understandings, representations and warranties, both written and oral, among the parties with respect to the subject matter hereof. This Subscription Agreement shall not confer any rights or remedies upon any person other than the parties hereto,
and their respective successor and assigns. 
 (h)    Except as otherwise provided herein, this Subscription Agreement
shall be binding upon, and inure to the benefit of the parties hereto and their heirs, executors, administrators, successors, legal representatives, and permitted assigns, and the agreements, representations, warranties, covenants and
acknowledgments contained herein shall be deemed to be made by, and be binding upon, such heirs, executors, administrators, successors, legal representatives and permitted assigns. 

(i)    If any provision of this Subscription Agreement shall be invalid, illegal or unenforceable, the validity, legality
or enforceability of the remaining provisions of this Subscription Agreement shall not in any way be affected or impaired thereby and shall continue in full force and effect. 

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

  
 21 

 (l)    Any notice or communication required or permitted hereunder shall
be in writing and either delivered personally, emailed or telecopied, sent by overnight mail via a reputable overnight carrier, or sent by certified or registered mail, postage prepaid, and shall be deemed to be given and received (a) when so
delivered personally, (b) upon receipt of an appropriate electronic answerback or confirmation when so delivered by telecopy (to such number specified below or another number or numbers as such person may subsequently designate by notice given
hereunder), (c) when sent, with no mail undeliverable or other rejection notice, if sent by email, or (d) five (5) business days after the date of mailing to the address below or to such other address or addresses as such person may
hereafter designate by notice given hereunder: 
 if to Subscriber, to such address or addresses set forth on the signature page hereto; 

if to the Issuer, to: 
 Kayne
Anderson Acquisition Corp 
 811 Main Street, Suite 1400 

Houston, Texas 77002 
 Attention:
Terry Hart 
 Facsimile: (713) 655-7359 

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

Latham & Watkins LLP 

811 Main Street, Suite 3700 

Houston, Texas 77002 
 Attention:
William N. Finnegan IV 
 Telephone: (713) 546-7410 

Facsimile: (713) 546-5401 

E-mail: bill.finnegan@lw.com 

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

(n)    This Subscription Agreement, and any claim or cause of action hereunder based upon, arising out of or related to
this Subscription Agreement (whether based on law, in equity, in contract, in tort or any other theory) or the negotiation, execution, performance or enforcement of this Subscription Agreement, shall be governed by and construed in accordance with
the Laws of the State of New York, without giving effect to the principles of conflicts of laws thereof. 

  
 22 

 THE PARTIES HERETO IRREVOCABLY SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE UNITED STATES
DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK, THE SUPREME COURT OF THE STATE OF NEW YORK AND THE FEDERAL COURTS OF THE UNITED STATES OF AMERICA LOCATED IN THE STATE OF NEW YORK SOLELY IN RESPECT OF THE INTERPRETATION AND ENFORCEMENT OF THE
PROVISIONS OF THIS SUBSCRIPTION AGREEMENT AND THE DOCUMENTS REFERRED TO IN THIS SUBSCRIPTION AGREEMENT AND IN RESPECT OF THE TRANSACTIONS CONTEMPLATED HEREBY, AND HEREBY WAIVE, AND AGREE NOT TO ASSERT, AS A DEFENSE IN ANY ACTION, SUIT OR PROCEEDING
FOR INTERPRETATION OR ENFORCEMENT HEREOF OR ANY SUCH DOCUMENT THAT IS NOT SUBJECT THERETO OR THAT SUCH ACTION, SUIT OR PROCEEDING MAY NOT BE BROUGHT OR IS NOT MAINTAINABLE IN SAID COURTS OR THAT VENUE THEREOF MAY NOT BE APPROPRIATE OR THAT THIS
SUBSCRIPTION AGREEMENT OR ANY SUCH DOCUMENT MAY NOT BE ENFORCED IN OR BY SUCH COURTS, AND THE PARTIES HERETO IRREVOCABLY AGREE THAT ALL CLAIMS WITH RESPECT TO SUCH ACTION, SUIT OR PROCEEDING SHALL BE HEARD AND DETERMINED BY SUCH A NEW YORK STATE OR
FEDERAL COURT. THE PARTIES HEREBY CONSENT TO AND GRANT ANY SUCH COURT JURISDICTION OVER THE PERSON OF SUCH PARTIES AND OVER THE SUBJECT MATTER OF SUCH DISPUTE AND AGREE THAT MAILING OF PROCESS OR OTHER PAPERS IN CONNECTION WITH SUCH ACTION, SUIT OR
PROCEEDING IN THE MANNER PROVIDED IN SECTION 11(l) OR IN SUCH OTHER MANNER AS MAY BE PERMITTED BY LAW SHALL BE VALID AND SUFFICIENT SERVICE THEREOF. 

EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS SUBSCRIPTION AGREEMENT OR THE TRANSACTIONS CONTEMPLATED
HEREBY IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING
OUT OF OR RELATING TO THIS SUBSCRIPTION AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS SUBSCRIPTION AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (I) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY
OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER; (II) SUCH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THE FOREGOING WAIVER; (III) SUCH PARTY MAKES THE FOREGOING
WAIVER VOLUNTARILY AND (IV) SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS SUBSCRIPTION AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVER AND CERTIFICATIONS IN THIS SECTION 11(n). 

  
 23 

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

					
	KAYNE ANDERSON ACQUISITION CORP.
		
	By:	 	
                     
                                         
   

		 	Name:	 	Terry Hart                    
		 	Title:	 	Chief Financial Officer and Secretary

 Date:    August 8, 2018 

  
 Signature Page to

 Subscription Agreement 
  

									
	SUBSCRIBER:	 		 	
			
	Signature of Subscriber:	 		 	Signature of Joint Subscriber, if applicable:
					
	By:	 	
                     
                                         
                               
	 		 	By:	 	
                     
                                         
                                   

	Name:	 		 		 	Name:	 	
	Title:	 		 		 	Title:	 	

 Date:             , 2018 

 

					
	Signature of Subscriber:	 		 	Signature of Joint Subscriber, if applicable:
			
	  
	 		 	  

	 (Please print. Please indicate name and

capacity of person signing above)
	 		 	 (Please print. Please indicate name and

capacity of person signing above)

			
	  
	 		 	
	 Name in which securities are to be registered

(if different)
	 		 	
			
	Email Address:	 		 	
			
	If there are joint investors, please check one:	 		 	
			
	 ☐   Joint Tenants with Rights of Survivorship
	 		 	
			
	
☐   Tenants-in-Common

	 		 	
			
	 ☐   Community Property
	 		 	
			
	Subscriber’s EIN:                                 
                                         
            	 		 	Joint Subscriber’s EIN:
			
		 		 	  

	Business Address-Street:	 		 	Mailing Address-Street (if different):
			
	  
	 		 	  

			
	  
	 		 	  

	City, State, Zip:	 		 	City, State, Zip:
			
	Attn:	 		 	Attn:
			
	Telephone No.:                                   
                                         
              	 		 	Telephone No.:                                  
                                         
                    
			
	Facsimile No.:                                   
                                         
                	 		 	Facsimile No.:                                  
                                         
                     

  
 Signature Page to

 Subscription Agreement 
  

	
	Aggregate Number of Acquired Shares subscribed for:
	
	  

	
	 Aggregate Purchase Price:
 $
            .

 You must pay the Purchase Price by wire transfer of United States dollars in immediately available funds to the account
specified by the Issuer in the Closing Notice. 

  
 Signature Page to

 Subscription Agreement 
  

 SCHEDULE A 

ELIGIBILITY REPRESENTATIONS OF 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 (a
“QIB”)). 

  

	 	2.	 ☐ We are subscribing for the Acquired Shares as a fiduciary or agent for one or more investor accounts,
and each owner of such account is a QIB. 

 *** OR *** 
  

	B.	 INSTITUTIONAL ACCREDITED INVESTOR STATUS 

(Please check the applicable subparagraphs): 
  

	 	1.	 ☐ We are an “accredited investor” (within the meaning of Rule 501(a) under the Securities Act)
or an entity in which all of the equity holders are accredited investors within the meaning of Rule 501(a) under the Securities Act, and have marked and initialed the appropriate box on the following page indicating the provision under which we
qualify as an “accredited investor.” 

  

	 	2.	 ☐ We are not a natural person. 

 

	***	 AND *** 

  

	C.	 AFFILIATE STATUS 

(Please check the applicable box) 

SUBSCRIBER: 
  

	 	☐	 is: 

  

	 	☐	 is not: 

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

 Schedule A should be completed by Subscriber 

and constitutes a part of the Subscription Agreement. 

  
 Schedule A 

 Schedule A-1 

Rule 501(a), in relevant part, states that an “accredited investor” shall mean any person who comes within any of the below listed categories, or
who the issuer reasonably believes comes within any of the below listed categories, at the time of the sale of the securities to that person. Subscriber has indicated, by marking and initialing the appropriate box below, the provision(s) below which
apply to Subscriber and under which Subscriber accordingly qualifies as an “accredited investor.” 
 ☐ Any 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 its individual or fiduciary capacity; 

☐ Any broker or dealer registered pursuant to section 15 of the Securities Exchange Act of 1934; 

☐ Any insurance company as defined in section 2(a)(13) of the Securities Act; 

☐ Any 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; 
 ☐ Any 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; 
 ☐ Any 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 such plan has total assets in excess of $5,000,000; 

☐ Any employee benefit plan within the meaning of the Employee Retirement Income Security Act of 1974 if the investment decision is made
by a plan fiduciary, as defined in section 3(21) of such act, which is either a bank, savings and loan association, insurance company, or registered investment adviser, or if the employee benefit plan has total assets in excess of $5,000,000 or, if
a self-directed plan, with investment decisions made solely by persons that are accredited investors; 
 ☐ Any private business
development company as defined in section 202(a)(22) of the Investment Advisers Act of 1940; 
 ☐ Any organization described in section
501(c)(3) of the Internal Revenue Code, corporation, Massachusetts or similar business trust, or partnership, not formed for the specific purpose of acquiring the securities offered, with total assets in excess of $5,000,000; or 

☐ Any trust, with total assets in excess of $5,000,000, not formed for the specific purpose of acquiring the securities offered, whose
purchase is directed by a sophisticated person as described in § 230.506(b)(2)(ii). 
 Schedule
A-1 should be completed by Subscriber 
 and constitutes a part of the Subscription
Agreement. 

  
 Schedule A-1 

 Schedule A-2 

☐ Any natural person whose individual net worth, or joint net worth with that person’s spouse, at the time of his purchase exceeds
$1,000,000. For purposes of calculating a natural person’s net worth: (a) the person’s primary residence must not be included as an asset; (b) indebtedness secured by the person’s primary residence up to the estimated
fair market value of the primary residence must not be included as a liability (except that if the amount of such indebtedness outstanding at the time of calculation exceeds the amount outstanding 60 days before such time, other than as a result of
the acquisition of the primary residence, the amount of such excess must be included as a liability); and (c) indebtedness that is secured by the person’s primary residence in excess of the estimated fair market value of the residence must
be included as a liability; 
 ☐ Any natural person who had an individual income in excess of $200,000 in each of the two most
recent years or joint income with that person’s spouse in excess of $300,000 in each of those years and has a reasonable expectation of reaching the same income level in the current year; 

☐ Any entity in which all of the equity owners are accredited investors meeting one or more of the above tests. 

Schedule A-2 should be completed by Subscriber 

and constitutes a part of the Subscription Agreement. 

  
 Schedule A-2EX-10.3

 Exhibit 10.3

Execution Version 

SPONSOR FORFEITURE AGREEMENT 

August 8, 2018 
 Kayne Anderson Acquisition
Corp. 
 811 Main Street, 14th Floor 

Houston, Texas 77002 
 Apache Midstream LLC 

2000 Post Oak Boulevard, Suite 100 
 Houston, Texas 77056 

Re: Forfeiture of Founder Shares and Private Placement Warrants 

Ladies and Gentlemen: 
 Reference is made to
that certain Contribution Agreement (the “Contribution Agreement”), dated as of the date hereof, by and among Kayne Anderson Acquisition Corp., a Delaware corporation (the “Company”), Apache Midstream
LLC, a Delaware limited liability company (the “Contributor”), and the other parties thereto. Capitalized terms used but not defined herein shall have the meanings ascribed to them in the Contribution Agreement. 

In order to induce the Contributor and the Company to enter into the Contribution Agreement and to proceed with the transactions contemplated
therein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Contributor, the Company, and Kayne Anderson Sponsor, LLC, a Delaware limited liability company (the
“Sponsor”), hereby agree, pursuant to this letter agreement (this “Letter Agreement”), for the benefit of the Company, as follows: 

 

	 	1.	 Immediately prior to (and contingent upon) the Closing, the Sponsor shall forfeit to the Company 3,182,140 of
the whole warrants the Sponsor acquired in connection with the Company’s initial public offering pursuant to that certain Sponsor Warrants Purchase Agreement, dated as of January 4, 2017 between the Sponsor and the Company (such warrants,
the “Forfeited Private Placement Warrants”, and such forfeiture, the “Warrant Forfeiture”). 

  

	 	2.	 Immediately prior to (and contingent upon) the Closing, the Sponsor shall forfeit to the Company (a) 1,862,606
shares of Buyer Class B Common Stock plus (b) a number of shares of Buyer Class B Common Stock equal to the product of (i) the number of shares of Buyer Class A Common Stock redeemed pursuant to exercise of the Buyer
Stockholder Redemption Right minus 2,000,000 and (ii) 26.6% (such shares described in (a) and (b) together, the “Forfeited Founder Shares”, and such forfeiture, the “Share Forfeiture”); provided,
however, that the number of Forfeited Founder Shares shall in no event be less than zero nor greater than 5,450,422. 

  

	 	3.	 To effect the Warrant Forfeiture and the Share Forfeiture (together, the
“Forfeitures”), immediately prior to (and contingent upon) the Closing: (a) the Sponsor shall surrender the Forfeited Private Placement Warrants and the Forfeited Founder Shares (together, the “Forfeited
Interests”) to the Company for cancellation and in exchange for no consideration; (b) the Company shall immediately retire and cancel all of the Forfeited Interests (and shall direct the Company’s transfer agent (or such other
intermediaries as appropriate) to take any and all such actions incident thereto); and (c) the Sponsor and the Company each shall take such actions as are necessary to cause the Forfeited Interests to be retired and canceled, after which
the Forfeited Interests shall no longer be issued, outstanding, convertible, or exercisable, and the Sponsor shall provide the Company and the Contributor with evidence that such retirement and cancellation has occurred. 

  
 1 

	 	4.	 At the Closing, the Company shall issue and contribute to Altus Midstream LP, a Delaware limited partnership
(the “KAAC Partnership”), (a) such number of shares of Buyer Class A Common Stock equal to the number of Forfeited Founder Shares and (b) the Contribution Warrants, all of which will immediately thereafter be
distributed by the KAAC Partnership to the Contributor in accordance with, and subject to, the terms and conditions of the Contribution Agreement and the A&R LP Agreement. 

 

	 	5.	 Prior to the Closing, the Sponsor shall not, directly or indirectly, transfer or otherwise dispose of any of
the shares of Buyer Class B Common Stock or the Forfeited Private Placement Warrants held by it, other than pursuant to the Forfeitures. 

  

	 	6.	 The Sponsor hereby represents and warrants to the Company and the Contributor, as of the date hereof and as of
the Closing, that the Sponsor owns, and holds of record, all of the Forfeited Interests, free and clear of all Liens and other obligations in respect of the Forfeited Interests. 

 

	 	7.	 No party hereto may assign either this Letter Agreement or any of its rights, interests, or obligations
hereunder without the prior written consent of each of the other parties hereto. 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 Letter Agreement shall be binding on the Sponsor, the Company, and Contributor and their respective successors and assigns. 

  

	 	8.	 Any notice, consent, or request to be given in connection with any of the terms or provisions of this Letter
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 facsimile transmission. 

 

	 	9.	 This Letter Agreement shall immediately terminate, without any further action by the parties hereto, at such
time, if at all, that the Contribution Agreement is terminated in accordance with its terms. 

  

	 	10.	 Section 10.3 (Entire Agreement), Section 10.4 (Waiver), Section 10.6 (Governing
Law; Consent to Jurisdiction; Severability; Waiver of Jury Trial), Section 10.7 (Amendments), Section 10.8 (Further Assurances), and Section 10.11 (Counterparts) of the Contribution Agreement are hereby
incorporated into this Letter Agreement, mutatis mutandis, as though set out in their entirety in this Paragraph 10. 

[Signature pages follow] 

  
 2 

 IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by each Party as of
the date first above written. 
  

					
	SPONSOR:
		
		 	KAYNE ANDERSON SPONSOR, LLC
			
		 		 	By: Kayne Anderson Capital Advisors, L.P.,
		 		 	Managing Member
			
		 	By:	 	 /s/ David Shladovsky

		 	Name:	 	David Shladovsky
		 	Title:	 	General Counsel
	
	COMPANY:
		
		 	KAYNE ANDERSON ACQUISITION CORP.
			
		 	By:	 	 /s/ Terry A. Hart

		 	Name:	 	 Terry A. Hart

		 	Title:	 	Chief Financial Officer

 (signature pages continue) 

  
 [Signature Page to
Sponsor Forfeiture Agreement] 

					
	CONTRIBUTOR:
		
		 	APACHE MIDSTREAM LLC
			
		 	By:	 	 /s/ Brian W. Freed

		 	Name:	 	Brian W. Freed
		 	Title:	 	Senior Vice President

  
 [Signature Page to
Sponsor Forfeiture Agreement]

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