Document:

EX-10.4

 Exhibit 10.4 

EXECUTION VERSION 

WARRANT EXCHANGE AGREEMENT 

This Warrant Exchange Agreement (this “Agreement”) is entered into as of July 15, 2020, by and between Fortress Value
Acquisition Corp., a Delaware corporation (the “Company”), and Fortress Acquisition Sponsor LLC (the “Sponsor”). The parties to this Agreement are referred to herein as the “Parties” or, each
individually, as a “Party.” Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Merger Agreement (as defined below). 

RECITALS 

WHEREAS, the Company was incorporated for the purpose of effecting a merger, share exchange, asset acquisition, share purchase,
reorganization or similar business combination with one or more businesses; 
 WHEREAS, substantially concurrently with the closing
of the Company’s initial public offering of the Company’s Class A ordinary shares, par value $0.0001 per share (“Class A Shares”), the Company issued to the Sponsor, 5,933,333 private placement
warrants for $1.50 per warrant, each of which is exercisable to purchase one Class A Share, at an exercise price of $11.50 per share (the “Private Placement Warrants”), pursuant to that certain Private Placement Warrants
Purchase Agreement, effective as of April 29, 2020, between the Sponsor and the Company (the “Private Placement Warrant Agreement”); 

WHEREAS, concurrently with the execution and delivery of this Agreement, the Company shall enter into that certain Merger Agreement
(the “Merger Agreement”), dated as of July 15, 2020, by and among the Company, FVAC Merger Corp. I, a Delaware corporation, FVAC Merger LLC II, a Delaware limited liability company, FVAC Merger LLC III, a Delaware limited
liability company, FVAC Merger LLC IV a Delaware limited liability company, MP Mine Operations LLC (“MPMO”), a Delaware limited liability company and Secure Natural Resources LLC (“SNR”), a Delaware limited
liability company, that, among other things, provides for a business combination transaction pursuant to which MPMO and SNR will, through a series of transactions, become indirect wholly-owned Subsidiaries of the Company; and 

WHEREAS, in connection with the transactions contemplated by the Merger Agreement, the Parties wish to enter into this Agreement,
pursuant to which immediately prior to, and contingent upon, the Initial Effective Times (the “Exchange Effective Time”), the Sponsor will exchange all of the 5,933,333 Private Placement Warrants held by the Sponsor with the Company
for newly issued shares of the Company’s Class F stock, par value $0.0001 per share (“Class F Shares”), at an exchange ratio of one (1) Private Placement Warrant for 0.15 of a Class F Share,
resulting in the exchange of 5,933,333 Private Placement Warrants into 890,000 Class F Shares (the “Acquired Shares”), on the terms and conditions set forth herein. 

NOW, THEREFORE, in consideration of the premises, representations, warranties and the mutual covenants contained in this Agreement, and
for other good and valuable consideration, the receipt, sufficiency and adequacy of which are hereby acknowledged, the Parties hereto agree as follows: 

 AGREEMENT 

1. Issuance and Exchange. 

a) At the Exchange Effective Time, and subject to the conditions set forth in this Agreement, (i) the Sponsor shall surrender for
cancellation to the Company all of the Sponsor’s 5,933,333 Private Placement Warrants, which shall be deemed automatically cancelled and retired in full, and the Private Placement Warrant Agreement shall be deemed automatically terminated and
all rights, liabilities and obligations thereunder discharged in full, and (ii) in consideration therefor, the Company shall issue to the Sponsor 890,000 Class F Shares (the “Warrant Exchange Closing”). 

b) At the Exchange Effective Time and simultaneous with the consummation of the Warrant Exchange Closing, the Company shall (i) issue to
the Sponsor the Acquired Shares, and (ii) authorize and instruct the Company’s transfer agent to record the issuance of the Acquired Shares, in uncertificated, book-entry form, on the stock transfer books of the Company as of the Exchange
Effective Time. 
 c) Notwithstanding anything to the contrary in the Private Placement Warrant Agreement, the Sponsor hereby (i) waives
its right to exercise such Private Placement Warrants to purchase one Class A Share at an exercise price of $11.50 per share and (ii) agrees to exchange each Private Placement Warrant held by the Sponsor for 0.15 of a Class F Share
pursuant to the terms and conditions of this Agreement. 
 2. Delivery of Acquired Shares. 

a) The Company shall register the Sponsor as the owner of the Acquired Shares with the Company’s transfer agent by book entry on the date
of the Warrant Exchange Closing. The rights, privileges and preferences of the Acquired Shares shall be those ascribed to the Company’s Class F Shares in the Company’s certificate of incorporation, bylaws or any other charter document
of the Company, as shall be in effect from time to time. 
 b) The Acquired Shares shall contain a notation evidencing that the Acquired
Shares have not been registered under the Securities Act of 1933, as amended (the “Securities Act”). 
 c) The Company and
the Sponsor are each party to that certain Registration Rights Agreement, dated as of April 29, 2020, by and among the Company, the Sponsor and the other parties signatory thereto (the “Existing Registration Rights Agreement”).
At or prior to the Closing, the Sponsor, the Company and the other parties signatory thereto shall amend and restate the Existing Registration Rights Agreement, in the form attached to the Merger Agreement, and the Company and the Sponsor agree that
the Acquired Shares will constitute “Registrable Securities” for purposes of such agreement (the “Registration Rights”). 

d) The Sponsor and the Company acknowledge and agree that the Acquired Shares shall be subject to the same terms and conditions applicable to
the Founder Shares (as defined in the Letter Agreement, dated as of the date hereof, by and among the Company, the Sponsor and the other parties signatory thereto (the “Letter Agreement”), including, without limitation, the
restrictions set forth in Sections 1, 3, 7 (excluding Section 7(b) thereof) and 17 of the Letter Agreement. 

  
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 e) Notwithstanding anything to the contrary contained in Section 7(b) of the Letter
Agreement, prior to the Warrant Exchange Closing, Sponsor shall not, directly or indirectly, sell, assign, transfer or otherwise dispose of or hypothecate, or otherwise grant any interest in or to, the Private Placement Warrants other than pursuant
to this Agreement. 
 3. Representations and Warranties of the Sponsor. The Sponsor represents and warrants to the Company as follows
as of the date hereof: 
  

	 	a)	 Organization and Requisite Authority. The Sponsor possesses all requisite power and authority necessary
to carry out the transactions contemplated by this Agreement. 

  

	 	b)	 Authorization; No Breach. 

 

	 	i)	 This Agreement constitutes a valid and binding obligation of the Sponsor, enforceable in accordance with its
terms, subject to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights and to general equitable principles (whether considered in a
proceeding in equity or law). 

  

	 	ii)	 The execution and delivery by the Sponsor of this Agreement and the fulfillment of and compliance with the
terms hereof by the Sponsor does not and shall not as of the Warrant Exchange Closing conflict with or result in a breach by the Sponsor of the terms, conditions or provisions of any agreement, instrument, order, judgment or decree to which the
Sponsor is subject. 

  

	 	c)	 Investment Representations. 

 

	 	i)	 The Sponsor is acquiring the Acquired Shares, for the Sponsor’s own account, for investment purposes only
and not with a view towards, or for resale in connection with, any public sale or distribution thereof. 

  

	 	ii)	 The Sponsor is an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D
under the Securities Act. 

  

	 	iii)	 The Sponsor understands that the Acquired Shares will be issued in reliance on specific exemptions from the
registration requirements of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the Sponsor’s compliance with, the representations and warranties of the Sponsor set forth
herein in order to determine the availability of such exemptions and the eligibility of the Sponsor to acquire the Acquired Shares. 

  

	 	iv)	 The Sponsor did not decide to enter into this Agreement as a result of any general solicitation or general
advertising within the meaning of Rule 502(c) under the Securities Act. 

  
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	 	v)	 The Sponsor has been furnished with all materials relating to the business, finances and operations of the
Company and materials relating to the transactions contemplated by this Agreement which have been requested by the Sponsor. The Sponsor has been afforded the opportunity to ask questions of the executive officers and directors of the Company.

  

	 	vi)	 The Sponsor understands that no United States federal or state agency or any other government or governmental
agency has passed on or made any recommendation or endorsement of the Acquired Shares or the fairness or suitability of the investment in the Acquired Shares by the Sponsor nor have such authorities passed upon or endorsed the merits of the offering
of the Acquired Shares. 

  

	 	vii)	 The Sponsor understands that: (A) the Acquired Shares have not been and are not being registered under the
Securities Act or any state securities laws, and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold in reliance on an exemption therefrom; and (B) except as
specifically set forth in the A&R Registration Rights Agreement, neither the Company nor any other person is under any obligation to register the Acquired Shares under the Securities Act or any state securities laws or to comply with the terms
and conditions of any exemption thereunder. In this regard, the Sponsor understands that the SEC has taken the position that promoters or affiliates of a blank check company and their transferees, both before and after a business combination
transaction, are deemed to be “underwriters” under the Securities Act when reselling the securities of a blank check company. Based on that position, Rule 144 adopted pursuant to the Securities Act would not be available for resale
transactions of the Acquired Shares despite technical compliance with the requirements of such Rule, and the Acquired Shares can be resold only through a registered offering or in reliance upon another exemption from the registration requirements of
the Securities Act. 

  

	 	viii)	 The Sponsor has such knowledge and experience in financial and business matters, and is capable of evaluating
the merits and risks of an investment in the Acquired Shares. The Sponsor has adequate means of providing for its current financial needs and contingencies and will have no current or anticipated future needs for liquidity which would be jeopardized
by the investment in the Acquired Shares. The Sponsor can afford a complete loss of its investment in the Acquired Shares. 

4. Representations and Warranties of the Company. The Company represents and warrants to the Sponsor as follows as of the date hereof.

  

	 	a)	 Organization and Corporate Power. The Company is a corporation duly incorporated, validly existing and
in good standing under the laws of the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating
results or assets of the Company. The Company possesses all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement. 

  
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	 	b)	 Authorization; No Breach. 

 

	 	i)	 The execution, delivery and performance of this Agreement has been duly authorized by the Company as of the
Warrant Exchange Closing. This Agreement constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of
general applicability relating to or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or law). 

 

	 	ii)	 The execution and delivery by the Company of this Agreement, the exchange of the Private Placement Warrants,
the issuance of the Acquired Shares and the fulfillment of, and compliance with, the respective terms hereof and thereof by the Company, do not and will not as of the Warrant Exchange Closing (A) conflict with or result in a breach of the
terms, conditions or provisions of, (B) constitute a default under, (C) result in the creation of any lien, security interest, charge or encumbrance upon the Company’s capital stock or assets under, (D) result in a violation of,
or (E) require any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental body or agency pursuant to the certificate of incorporation of the
Company or the bylaws of the Company, or any material law, statute, rule or regulation to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings required after the date
hereof under federal or state securities laws. 

  

	 	c)	 Title to Acquired Shares. Upon issuance in accordance with the terms hereof, the Acquired Shares will be
duly and validly issued, fully paid and nonassessable. Upon issuance in accordance with the terms hereof, the Sponsor will have good title to the Acquired Shares, free and clear of all liens, claims and encumbrances of any kind, other than
(i) transfer restrictions hereunder and under the other agreements contemplated hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due to the actions of the
Sponsor. 

  

	 	d)	 Governmental Consents. No permit, consent, approval or authorization of, or declaration to or filing
with, any Governmental Entity is required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions contemplated hereby. 

5. Conditions of the Sponsor’s Obligations. The obligations of the Sponsor to the Company under this Agreement are subject
to the fulfillment, on or before the Warrant Exchange Closing, of each of the following conditions: 
  

	 	a)	 Representations and Warranties. The representations and warranties of the Company contained in
Section 4 hereof shall be true and correct at and as of the Warrant Exchange Closing as though then made. 

  

	 	b)	 Performance. The Company shall have performed and complied with all agreements, obligations and
conditions contained in this Agreement that are required to be performed or complied with by it on or before the Warrant Exchange Closing. 

  
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	 	c)	 No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction
shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the
consummation of any of the transactions contemplated by this Agreement. 

  

	 	d)	 Merger Agreement. The Merger Agreement shall not have been terminated, and the Company shall have
satisfied or received a waiver of satisfaction of its respective conditions to the consummation of the Transactions as set forth in Article VIII of the Merger Agreement. 

6. Conditions of the Company’s Obligations. The obligations of the Company to the Sponsor under this Agreement are subject to the
fulfillment, on or before the Warrant Exchange Closing, of each of the following conditions: 
  

	 	a)	 Representations and Warranties. The representations and warranties of the Sponsor contained in
Section 3 hereof shall be true and correct at and as of the Warrant Exchange Closing as though then made. 

  

	 	b)	 Performance. The Sponsor shall have performed and complied with all agreements, obligations and
conditions contained in this Agreement that are required to be performed or complied with by the Sponsor on or before the Warrant Exchange Closing. 

  

	 	c)	 No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction
shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the
consummation of any of the transactions contemplated by this Agreement. 

  

	 	d)	 Merger Agreement. The Merger Agreement shall not have been terminated, and the Company shall have
satisfied or received a waiver of satisfaction of its conditions to the consummation of the Transactions as set forth in Article VIII of the Merger Agreement. 

7. Termination. This Agreement may be terminated only upon (a) by mutual written consent of the Company and the Sponsor or
(b) automatically upon the termination of the Merger Agreement in accordance with its terms. 
 8. Miscellaneous.  

 

	 	a)	 Successors and Assigns. Except as otherwise expressly provided herein, all covenants and agreements
contained in this Agreement by or on behalf of any of the Parties hereto shall bind and inure to the benefit of the respective successors of the Parties hereto whether so expressed or not. Notwithstanding the foregoing or anything to the contrary
herein, the Parties may not assign this Agreement, other than assignments by the Sponsor to affiliates thereof. 

  

	 	b)	 Severability. Whenever possible, each provision of this Agreement shall be interpreted in such manner as
to be effective and valid under applicable law, but if any provision of this 

  
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Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective only to the extent of such prohibition or invalidity, without invalidating the remainder
of this Agreement. 

  

	 	c)	 Counterparts. This Agreement may be executed simultaneously in two or more counterparts, none of which
need contain the signatures of more than one Party, but all such counterparts taken together shall constitute one and the same agreement. 

  

	 	d)	 Descriptive Headings; Interpretation. The descriptive headings of this Agreement are inserted for
convenience only and do not constitute a substantive part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by limitation. 

 

	 	e)	 Governing Law. This Agreement shall be deemed to be a contract made under the laws of the State of New
York and for all purposes shall be construed in accordance with the internal laws of the State of New York. 

  

	 	f)	 Amendments. This Agreement may not be amended, modified or waived as to any particular provision, except
by a written instrument executed by all Parties. 

 [Signature Page Follows] 

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

 

			
	SPONSOR:
	
	FORTRESS ACQUISITION SPONSOR LLC
		
	By:	 	 /s/ Alexander Gillette

		 	 Name: Alexander Gillette
 Title:
Secretary

  
  
  

			
	COMPANY:
	
	FORTRESS VALUE ACQUISITION CORP.
		
	By:	 	 /s/ Andrew A. McKnight

		 	 Name: Andrew A. McKnight
 Title: Chief Executive
Officer

 [Signature Page to Warrant Exchange Agreement]EX-10.5

 Exhibit 10.5 

Fortress Value Acquisition Corp. 
 1345 Avenue of the Americas,
46th Floor 
 New York, New York 10105 

July 15, 2020 
  

	Re:	 Parent Sponsor Letter Agreement  

Ladies and Gentlemen: 
 This letter agreement
(this “Letter Agreement”) is being delivered to you in connection with that certain Agreement and Plan of Merger (the “Merger Agreement”), dated as of the date hereof, by and among Fortress Value Acquisition Corp.,
a Delaware corporation (“Parent”), MP Mine Operations LLC, a Delaware limited liability company (“MPMO”), Secure Natural Resources LLC, a Delaware limited liability company (“SNR” and, together with
MPMO, the “Companies”), and the other parties thereto and hereby amends and restates in its entirety that certain Letter Agreement, dated as of April 29, 2020, from Fortress Acquisition Sponsor LLC (the
“Sponsor”) and each of the undersigned individuals, each of whom is a member of Parent’s board of directors and/or management team (each, an “Insider” and collectively, the “Insiders”) to
Parent. Certain capitalized terms used herein are defined in paragraph 11 hereof. Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Merger Agreement. 

In order to induce the Companies and Parent to enter into the Merger Agreement and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Sponsor and each of the Insiders hereby severally (and not jointly and severally) agree with Parent, as follows: 

1. The Sponsor and each Insider agrees with Parent that if Parent seeks Parent Stockholder Approval of a proposed Business Combination
(including, without limitation, the Transactions), then in connection with such proposed Business Combination, it, he or she shall: (i) appear at such meeting or otherwise cause any Covered Shares owned by it, him or her to be counted as
present thereat for the purpose of establishing a quorum, (ii) vote (or execute and return an action by written consent), or cause to be voted at such meeting (or validly execute and return and cause such consent to be granted with respect
thereto), all of its, his or her Covered Shares in favor of each Parent Stockholder Matter and any other matters necessary or reasonably requested by Parent in connection with a proposed Business Combination and (iii) not redeem any of its
Covered Shares owned by it, him or her for redemption in connection with such stockholder approval or proposed Business Combination. 
 2.
The Sponsor and each Insider hereby agrees with Parent that in the event that Parent fails to consummate a Business Combination within 24 months from the closing of the Public Offering, or such later period approved by Parent’s stockholders in
accordance with Parent’s amended and restated certificate of incorporation, the Sponsor and each Insider shall take all reasonable steps to cause Parent to (i) cease all operations except for the purpose of winding up, (ii) as
promptly as reasonably possible but not more than 10 business days thereafter, subject to lawfully available funds therefor, redeem 100% of the Common Stock sold as part of the Units in the Public Offering (the “Offering Shares”),
at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to Parent
to 

 
pay its taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Offering Shares, which redemption will completely extinguish all Public
Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), and (iii) as promptly as reasonably possible following such redemption, subject to the approval of Parent’s remaining
stockholders and Parent’s board of directors, dissolve and liquidate, subject in each case to Parent’s obligations under Delaware law to provide for claims of creditors and other requirements of other applicable law. The Sponsor and each
Insider agrees to not propose any amendment (i) to Parent’s amended and restated certificate of incorporation that would affect the substance or timing of Parent’s obligation to allow redemption in connection with Parent’s
initial Business Combination or to redeem 100% of the Offering Shares if Parent does not complete a Business Combination within 24 months from the closing of the Public Offering or (ii) with respect to any other provision of Parent’s
amended and restated certificate of incorporation relating to stockholders’ rights or pre-initial Business Combination activity, unless Parent provides its Public Stockholders with the opportunity to
redeem their shares of Common Stock upon approval of any such amendment at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on
the funds held in the Trust Account and not previously released to Parent to pay its taxes, divided by the number of then outstanding Offering Shares. 

The Sponsor and each Insider acknowledges that it, he or she has no right, title, interest or claim of any kind in or to any monies held in
the Trust Account or any other asset of Parent as a result of any liquidation of Parent with respect to the Founder Shares held by it, him or her. The Sponsor and each Insider hereby further waives, with respect to any shares of Common Stock held by
it, him or her, if any, any redemption rights it, he or she may have in connection with the consummation of a Business Combination, including, without limitation, any such rights available in the context of a stockholder vote to approve such
Business Combination or in the context of a tender offer made by Parent to purchase shares of Common Stock (although the Sponsor, the Insiders and their respective affiliates shall be entitled to redemption and liquidation rights with respect to any
Offering Shares they hold if Parent fails to consummate a Business Combination within 24 months from the date of the closing of the Public Offering). The Sponsor and each Insider hereby further waives, with respect to any shares of Common Stock held
by it, him or her, if any, any redemption rights it, he or she may have in connection with a stockholder vote to approve an amendment to Parent’s amended and restated certificate of incorporation (A) to modify the substance or timing of
Parent’s obligation to allow redemption in connection with Parent’s initial Business Combination or to redeem 100% of the Offering Shares if Parent does not complete a Business Combination within 24 months from the closing of the Public
Offering or (B) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination activity. 

3. Notwithstanding the provisions set forth in paragraph 7(a) below, during the period commencing on the effective date of the Underwriting
Agreement and ending 180 days after such date, the Sponsor and each Insider shall not, without the prior written consent of the Representatives, (i) sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to
purchase or otherwise dispose of or agree to dispose of, directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Securities Exchange
Act of 1934, as amended (the “Exchange Act”), and the rules and regulations of the Securities and Exchange Commission (the “Commission”) promulgated thereunder, with respect to any Units, shares of Common Stock,
Founder Shares, Parent Warrants or any securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by it, him or her, (ii) enter into any swap or 

  
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other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any Units, shares of Common Stock, Founder Shares, Parent Warrants or any
securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by it, him or her, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) publicly announce any
intention to effect any transaction, including the filing of a registration statement, specified in clause (i) or (ii). Each of the Insiders and the Sponsor acknowledges and agrees that, prior to the effective date of any release or waiver of
the restrictions set forth in this paragraph 3 or paragraph 7 below, Parent shall announce the impending release or waiver by press release through a major news service at least two business days before the effective date of the release or waiver.
Any release or waiver granted shall only be effective two business days after the publication date of such press release. The provisions of this paragraph will not apply if the release or waiver is effected solely to permit a transfer not for
consideration and the transferee has agreed in writing to be bound by the same terms described in this Letter Agreement to the extent and for the duration that such terms remain in effect at the time of the transfer. 

4. In the event of the liquidation of the Trust Account, the Sponsor (which for purposes of clarification shall not extend to any other
shareholders, members or managers of the Sponsor) agrees to indemnify and hold harmless Parent against any and all loss, liability, claim, damage and expense whatsoever (including, but not limited to, any and all legal or other expenses reasonably
incurred in investigating, preparing or defending against any litigation, whether pending or threatened, or any claim whatsoever) to which Parent may become subject as a result of any claim by (a) any third party for services rendered (other
than Parent’s independent public accountants) or products sold to Parent or (b) a prospective target business with which Parent has discussed entering into a transaction agreement (a “Target”); provided,
however, that such indemnification of Parent by the Sponsor shall apply only to the extent necessary to ensure that such claims by a third party for services rendered (other than Parent’s independent public accountants) or products sold
to Parent or a Target do not reduce the amount of funds in the Trust Account to below (i) $10.00 per Offering Share or (ii) such lesser amount per Offering Share held in the Trust Account due to reductions in the value of the trust assets as of
the date of the liquidation of the Trust Account, in each case, net of the amount of interest earned on the property in the Trust Account which may be withdrawn to pay its taxes, except as to any claims by a third party (including a Target) who
executed a waiver of any and all rights to seek access to the Trust Account and except as to any claims under Parent’s indemnity of the Public Offering underwriters against certain liabilities, including liabilities under the Securities Act of
1933, as amended. In the event that any such executed waiver is deemed to be unenforceable against such third party, the Sponsor shall not be responsible to the extent of any liability for such third party claims. The Sponsor shall have the right to
defend against any such claim with counsel of its choice reasonably satisfactory to Parent if, within 15 days following written receipt of notice of the claim to the Sponsor, the Sponsor notifies Parent in writing that it shall undertake such
defense. For the avoidance of doubt, none of Parent’s officers or directors will indemnify Parent for claims by third parties, including, without limitation, claims by vendors and prospective target businesses. 

5. The Sponsor and each Insider hereby agrees and acknowledges that: (a) the Public Offering underwriters would be irreparably injured in
the event of a breach by such Sponsor or Insider of its, his or her obligations under paragraphs 1, 2, 3, 4, 5, 7(a) and 9, as applicable, of this Letter Agreement, (b) the Companies would be irreparably injured in the event of a breach by such
Sponsor or Insider of its, his or her obligations under paragraphs 1, 5, 6, 7 and 9, as applicable, of this Letter Agreement, (c) monetary damages may not be an adequate remedy for such breach and (d) the
non-breaching party shall be entitled to injunctive relief, in addition to any other remedy that such party may have in law or in equity, in the event of such breach. 

  
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 6. The Sponsor and each Insider hereby agrees that, subject to the satisfaction or waiver of
each of the conditions to Closing set forth in Article VIII of the Merger Agreement, immediately prior to the Closing, (a)(i) if the amount of cash available in the Trust Account, less (ii) any amounts required to satisfy Parent’s
stockholder redemptions, plus (b) the PIPE Investment Amount, is less than $495 million, then Sponsor and each Insider shall surrender to Parent a number of Founder Shares (the “Surrendered Shares”) equal to their
pro rata share of the product of (x) 8,625,000 and (y) a fraction, the numerator of which is (1) $495 million, minus (2)(A) the cash available in the Trust Account after deducting the amount required to satisfy redemptions,
plus (B) the PIPE Investment Amount, and the denominator of which is $495 million. 
 7.
        (a) Notwithstanding the provisions set forth in paragraph 3, the Sponsor and each Insider agrees that it, he or she shall not Transfer any Founder Shares (or shares of Common Stock issuable upon
conversion thereof) or any Private Placement Warrants (or shares of Capital Stock issued or issuable upon the exchange, exercise or conversion of the Private Placement Warrants) until the earliest to occur of: (i) one year after the completion
of Parent’s initial Business Combination; (ii) subsequent to Parent’s initial Business Combination, if the last reported sale price of the shares of Common Stock equals or exceeds $12.00 per share for any 20 trading days within any 30-trading day period commencing at least 150 days after Parent’s initial Business Combination; and (iii) the date following the completion of Parent’s initial Business Combination on which Parent
completes a liquidation, merger, stock exchange, reorganization or other similar transaction that results in all of Parent’s Public Stockholders having the right to exchange their shares of common stock for cash, securities or other property
(the “Lock-up Period”). 
 (b) Notwithstanding the provisions set forth in
paragraphs 3 and 7(a), Transfers of the Founder Shares, Private Placement Warrants and shares of Capital Stock issued or issuable upon the exchange, exercise or conversion of the Private Placement Warrants or the Founder Shares and that are held by
the Sponsor, Insider or any of their permitted transferees (that have complied with this paragraph 7(b)), are permitted: (i) to Parent’s officers or directors, any affiliates or family members of any of Parent’s officers or directors,
any members of the Sponsor, or any affiliates of the Sponsor; (ii) in the case of an individual, by gift to a member of the individual’s immediate family, to a trust, the beneficiary of which is a member of the individual’s immediate
family or an affiliate of such person, or to a charitable organization; (iii) in the case of an individual, by virtue of laws of descent and distribution upon death of the individual; (iv) in the case of an individual, pursuant to a
qualified domestic relations order; (v) by private sales or transfers made in connection with the consummation of a Business Combination at prices no greater than the price at which the securities were originally purchased; (vi) transfers
in the event of Parent’s liquidation prior to the completion of an initial Business Combination; (vii) by virtue of the laws of the State of Delaware or the Sponsor’s limited liability company agreement upon dissolution of the
Sponsor; and (viii) in the event of Parent’s liquidation, merger, capital stock exchange, reorganization or other similar transaction which results in all of Parent’s stockholders having the right to exchange their shares of Common
Stock for cash, securities or other property subsequent to the completion of Parent’s initial Business Combination; provided, however, that in the case of clauses (i) through (v), any such permitted transferee must enter into
a written agreement agreeing to be bound by the restrictions herein. 

  
 4 

 (c) Vesting Provisions for Founder Shares. The Sponsor and each of the Insiders
agrees that, as of the Closing, all of the remaining shares of Common Stock issued or issuable upon the exercise or conversion of the Founder Shares following Sponsor’s surrender of the Surrendered Shares to Parent (the “Vesting
Shares”) shall be unvested and shall be subject to the vesting and forfeiture provisions set forth in this paragraph 7(c). The Sponsor and each of the Insiders agrees that it shall not (and will cause its Affiliates not to) Transfer any
unvested Vesting Shares prior to the later of (x) the expiration of the Lock-up Period and (y) the date such Vesting Shares become vested pursuant to this paragraph 7(c). 

(i) Vesting of Shares. 

(1) 50% of the Vesting Shares beneficially owned by Sponsor and each of the Insiders shall vest at such time as a $12.00 Stock Price Level is
achieved on or before the date that is ten years after the Closing Date. 
 (2) 25% of the Vesting Shares beneficially owned by Sponsor and
each of the Insiders shall vest at such time as a $14.00 Stock Price Level is achieved on or before the date that is ten years after the Closing Date. 

(3) 25% of the Vesting Shares beneficially owned by Sponsor and each of the Insiders shall vest at such time as a $16.00 Stock Price Level is
achieved on or before the date that is ten years after the Closing Date. 
 (4) Holders of Vesting Shares subject to the vesting provisions
of this paragraph 7(c) shall be entitled to vote such Vesting Shares and receive dividends and other distributions with respect to such Vesting Shares prior to vesting; provided, that dividends and other distributions with respect to Vesting
Shares that are subject to performance vesting pursuant to paragraph 7(c)(i) shall be set aside by Parent and shall be paid to such holders upon the vesting of such Vesting Shares (if at all). 

(ii) Acceleration of Vesting upon a Parent Sale. Notwithstanding the foregoing, in the event Parent enters into a binding agreement
with respect to a Parent Sale on or before the tenth (10th) anniversary of the Closing Date, all Vesting Shares that were eligible to vest pursuant to paragraph 7(c)(i) and remain unvested, if any, shall vest on the day immediately preceding the
closing of such Parent Sale. For the avoidance of doubt, following a transaction or business combination that is not a “Parent Sale” hereunder, including a transaction or business combination in which the equity securities of the surviving
entity of such business combination or other transaction are registered under the Exchange Act and listed or quoted for trading on a national securities exchange, the equitable adjustment provisions of paragraph 17 shall apply, including, without
limitation, to the performance vesting criteria set forth in paragraph 7(c)(i). 
 (iii) Forfeiture of Unvested Founder Shares.
Vesting Shares that remain unvested on the first Business Day after the tenth (10th) anniversary of the Closing Date shall be surrendered by Sponsor or the applicable Insider to Parent, without any consideration for such Transfer. 

  
 5 

 (iv) Stock Price Level. For purposes of this paragraph 7(c), the applicable
“Stock Price Level” will be considered achieved only when the VWAP of Common Stock on the New York Stock Exchange equals or exceeds the applicable threshold for any 20 trading days during a 30 consecutive trading day period. The
Stock Price Levels will be equitably adjusted on account of any share split, reverse share split or similar equity restructuring transaction in accordance with paragraph 17 hereof. 

(v) Waiver of Conversion Ratio Adjustment. (A) Section 4.3(b)(i) of Parent’s amended and restated certificate of
incorporation provides that each Founder Share shall automatically convert into one share of Common Stock (the “Initial Conversion Ratio”) at the time of the Business Combination, and (B) Section 4.3(b)(ii) of
Parent’s amended and restated certificate of incorporation provides that the Initial Conversion Ratio shall be adjusted (the “Adjustment”) in the event that additional shares of Common Stock are issued in excess of the amounts
offered in Parent’s initial public offering of securities such that the Sponsor and the Insiders shall continue to own 25% of the issued and outstanding shares of Capital Stock after giving effect to such issuance. 

(vi) As of and conditioned upon the Closing, the Sponsor and each Insider hereby irrevocably relinquishes and waives any and all rights the
Sponsor and each Insider has or will have under Section 4.3(b)(ii) of Parent’s amended and restated certificate of incorporation to receive shares of Common Stock in excess of the number issuable at the Initial Conversion Ratio upon
conversion of the existing Founder Shares held by him, her or it, as applicable, in connection with the Closing as a result of any Adjustment. 

8. The Sponsor and each Insider represents and warrants that (i) it, he or she has never been suspended or expelled from membership in any
securities or commodities exchange or association or had a securities or commodities license or registration denied, suspended or revoked and (ii) it, he or she has full right and power, without violating any Contract to which it, he or she is
bound, to enter into this Letter Agreement. Each Insider’s biographical information furnished to Parent (including any such information included in the Prospectus) is true and accurate in all respects and does not omit any material information
with respect to such Insider’s background. The Sponsor’s and each Insider’s questionnaire furnished to Parent is true and accurate in all respects. The Sponsor and each Insider represents and warrants that: it, he or she is not
subject to or a respondent in any legal action for, any injunction, cease-and-desist order or order or stipulation to desist or refrain from any act or practice relating
to the offering of securities in any jurisdiction; it, he or she has never been convicted of, or pleaded guilty to, any crime (i) involving fraud, (ii) relating to any financial transaction or handling of funds of another person, or
(iii) pertaining to any dealings in any securities and it, he or she is not currently a defendant in any such criminal proceeding. 
 9.
Except as disclosed in the Prospectus, neither the Sponsor nor any Insider nor any affiliate of the Sponsor or any Insider, shall receive from Parent any finder’s fee, reimbursement, consulting fee, monies in respect of any repayment of a loan
or other compensation prior to, or in connection with any services rendered in order to effectuate the consummation of Parent’s initial Business Combination (regardless of the type of transaction that it is), other than the following, none of
which will be made from the proceeds held in the Trust Account prior to the completion of the initial Business Combination: repayment of a loan and advances of up to an aggregate of $300,000 made to Parent by the Sponsor to cover offering related
and organizational expenses; payment to an affiliate of the Sponsor for office space, administrative support services for a total of $20,000 per month; reimbursement for any
out-of-pocket expenses related to identifying, investigating and consummating an initial Business 

  
 6 

 
Combination, and repayment of loans, if any, and on such terms as to be determined by Parent from time to time, made by the Sponsor or any of Parent’s officers or directors to finance
transaction costs in connection with an intended initial Business Combination, provided, that, if Parent does not consummate an initial Business Combination, a portion of the working capital held outside the Trust Account may be used by
Parent to repay such loaned amounts so long as no proceeds from the Trust Account are used for such repayment. In the event the Merger Agreement is terminated in accordance with its terms, up to $1,500,000 of such loans may be convertible into
warrants of the post Business Combination entity at a price of $1.50 per warrant at the option of the lender. Such warrants would be identical to the Private Placement Warrants. 

10. The Sponsor and each Insider has full right and power, without violating any agreement to which it, he or she is bound (including, without
limitation, any non-competition or non-solicitation agreement with any employer or former employer), to enter into this Letter Agreement and, as applicable, to serve as
a director on the board of directors of Parent and hereby consents to being named in the Prospectus as a director of Parent. 
 11. As used
herein, the following terms shall have the respective meanings set forth below:  
 (a)
“beneficially own,” “beneficial ownership” and “beneficial owner” shall have the meaning ascribed to it in Section 13(d) of the Exchange Act. 

(b) “Business Combination” shall mean a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or
similar business combination, involving Parent and one or more businesses. 
 (c) “Capital Stock” shall mean, collectively,
the Common Stock and the Founder Shares. 
 (d) “Common Stock” shall mean Parent’s Class A common stock, par value
$0.0001 per share. 
 (e) “Covered Shares” shall mean, in respect of any Sponsor or Insider, all shares of Capital Stock
owned (beneficially or of record) by such Sponsor or Insider as of the date hereof, together with any additional shares of Common Stock or Founder Shares (or any securities convertible into or exercisable or exchangeable for Common Stock or Founder
Shares) in which such Sponsor or Insider acquires record or beneficial ownership after the date hereof, including by purchase, as a result of a stock dividend, stock split, recapitalization, combination, reclassification, exchange or change of such
shares, or upon exchange, exercise or conversion of any such securities. 
 (f) “Founder Shares” shall mean the 8,625,000
shares of Parent’s Class F common stock, par value $0.0001 per share, initially issued to the Sponsor for an aggregate purchase price of $25,000, or approximately $0.003 per share, prior to the consummation of the Public Offering. 

(g) “Parent Sale” shall mean the occurrence of any of the following events: (i) any Person or any group of Persons acting
together which would constitute a “group” for purposes of Section 13(d) of the Exchange Act or any successor provisions thereto is or becomes the beneficial owner, directly or indirectly, of securities of Parent representing more

  
 7 

 
than 50% of the combined voting power of Parent’s then outstanding voting securities, (ii) there is consummated a merger or consolidation of Parent with any other corporation or other
entity, and, immediately after the consummation of such merger or consolidation, either (A) the board of directors of Parent immediately prior to the merger or consolidation does not constitute at least a majority of the board of directors of
the company surviving the merger or, if the surviving company is a Subsidiary, the ultimate parent thereof, or (B) the voting securities of Parent immediately prior to such merger or consolidation do not continue to represent or are not
converted into more than 50% of the combined voting power of the then outstanding voting securities of the Person resulting from such merger or consolidation or, if the surviving company is a Subsidiary, the ultimate parent thereof, or (ii) the
shareholders of Parent approve a plan of complete liquidation or dissolution of Parent or there is consummated an agreement or series of related agreements for the sale, lease or other disposition, directly or indirectly, by Parent of all or
substantially all of the assets of Parent and its Subsidiaries, taken as a whole, other than such sale or other disposition by Parent of all or substantially all of the assets of Parent and its Subsidiaries, taken as a whole, to an entity at least
50% of the combined voting power of the voting securities of which are owned by shareholders of Parent in substantially the same proportions as their ownership of Parent immediately prior to such sale. 

(h) “Private Placement Warrants” shall mean the warrants to purchase up to 5,933,333 shares of Common Stock of Parent that the
Sponsor purchased for an aggregate purchase price of $8,900,000 in the aggregate, or $1.50 per warrant, in a private placement that occurred substantially concurrently with the consummation of the Public Offering. 

(i) “Prospectus” shall mean the registration statement on Form S-1 and prospectus
filed by Parent with the Commission in connection with the Public Offering. 
 (j) “Public Offering” shall mean the
underwritten initial public offering of 34,500,000 of Parent’s units (the “Units”), including the issuance of 4,500,000 Units as a result of the Parent underwriters’ exercise of their over-allotment option in
full, each comprised of one share of Common Stock and one-third of one warrant. 
 (k)
“Public Stockholders” shall mean the holders of securities issued in the Public Offering. 
 (l) “Transfer”
shall mean the (a) sale or assignment of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or
increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended and the rules and regulations of the Commission
promulgated thereunder with respect to, any security, (b) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to
be settled by delivery of such securities, in cash or otherwise, or (c) public announcement of any intention to effect any transaction specified in clause (a) or (b). 

(m) “VWAP” shall mean, for any security as of any date(s), the dollar volume-weighted average price for such security on the
principal securities exchange or securities market on which such security is then traded during the period beginning at 9:30:01 a.m., New York time, and ending at 4:00:00 p.m., New York time, as reported by Bloomberg through its “HP”
function (set to weighted average) or, if the foregoing does not apply, the dollar volume-weighted average price of such security in
the over-the-counter market on the 

  
 8 

 
electronic bulletin board for such security during the period beginning at 9:30:01 a.m., New York time, and ending at 4:00:00 p.m., New York time, as reported by Bloomberg, or, if no dollar
volume-weighted average price is reported for such security by Bloomberg for such hours, the average of the highest closing bid price and the lowest closing ask price of any of the market makers for such security as reported by OTC Markets Group
Inc. If the VWAP cannot be calculated for such security on such date(s) on any of the foregoing bases, the VWAP of such security on such date(s) shall be the fair market value per share on such date(s) as reasonably determined by Parent. 

12. This Letter Agreement and, solely as between Parent and the Sponsor, the Parent Sponsor Warrant Exchange Agreement, constitutes the entire
agreement and understanding of the parties hereto in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way
to the subject matter hereof or the transactions contemplated hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as to any particular provision, except by a written instrument
executed by all parties hereto. 
 13. No party hereto may assign either this Letter Agreement or any of its rights, interests, or
obligations hereunder without the prior written consent of the other parties and the Companies, who are intended third party beneficiaries of paragraph 5 hereof (except that, following any valid termination of the Merger Agreement, no consent from
the Companies shall be required). Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title to the purported assignee. This Letter Agreement shall be
binding on Parent, Sponsor and each Insider and their respective successors, heirs and assigns and permitted transferees. 
 14. This Letter
Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another
jurisdiction. The parties hereto (i) all agree that any action, proceeding, claim or dispute arising out of, or relating in any way to, this Letter Agreement shall be brought and enforced in the courts of New York City, in the State of New
York, and irrevocably submit to such jurisdiction and venue, which jurisdiction and venue shall be exclusive and (ii) waive any objection to such exclusive jurisdiction and venue or that such courts represent an inconvenient forum. 

15. 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. 

16. This Letter Agreement shall terminate on the earlier of (i) the latest of (x) the expiration of the Lock-up Period or (y) the vesting in full and delivery of all Vesting Shares, or (ii) the liquidation of Parent. No such termination shall relieve the Sponsor, the Insiders or Parent from any liability
resulting from a breach of this Letter Agreement occurring prior to such termination. 
 17. If, and as often as, there are any changes in
Parent, the Founder Shares or Common Stock by way of stock split, stock dividend, combination or reclassification, or through merger, consolidation, reorganization, recapitalization or business combination, or by any other means, equitable
adjustment shall be made to the provisions of this Letter Agreement 

  
 9 

 
as may be required so that the rights, privileges, duties and obligations hereunder shall continue with respect to Parent, Parent’s successor or the surviving entity of such transaction, the
Founder Shares or Common Stock, each as so changed. For the avoidance of doubt, such equitable adjustment shall be made to the applicable Stock Price Levels set forth in paragraph 7(c). 

18. Each party hereto that is also a party to that certain Registration Rights Agreement, dated as of April 29, 2020, by and among Parent,
the Sponsor and the other parties signatory thereto (the “Existing Registration Rights Agreement”), hereby agrees to amend and restate the Existing Registration Rights Agreement, effective as of the Closing. At or prior to the
Closing, the Sponsor and each Insider contemplated to become a party to the Registration Rights Agreement shall deliver to Parent such agreement, duly executed by such Person, in the form attached to the Merger Agreement. 

[Signature Page Follows] 

  
 10 

 
					
	Sincerely,
	
	SPONSOR:
	
	FORTRESS ACQUISITION SPONSOR LLC
		
	By:	 	 /s/ Alexander Gillette

		 	Name: Alexander Gillette
		 	Title:   Secretary
	
	INSIDERS:
		
	By:	 	 /s/ R. Edward Albert III

		 	Name: R. Edward Albert III
		
	By:	 	 /s/ Daniel N. Bass

		 	Name: Daniel N. Bass
		
	By:	 	 /s/ Micah B. Kaplan

		 	Name: Micah B. Kaplan
		
	By:	 	 /s/ Aaron F. Hood

		 	Name: Aaron F. Hood
		
	By:	 	 /s/ Carmen Policy

		 	Name: Carmen Policy

					
	Acknowledged and Agreed:
	
	PARENT:
	
	FORTRESS VALUE ACQUISITION CORP.
		
	By:	 	 /s/ Andrew A. McKnight

		 	Name: Andrew A. McKnight
		 	Title:   Chief Executive Officer

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