Exhibit 10.1

      

      

      THIS PROMISSORY NOTE (THIS “NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR
        ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

      

      

      PROMISSORY NOTE

      

      

      

      

      	
              Principal Amount: Up to $300,000

            	
              Dated as of February 12, 2020

            


      

      

      

      

      Longview Acquisition Corp., a Delaware corporation and blank check company (the “Maker”), promises to pay to the order of Longview Investors LLC, a Delaware
        limited liability company, or its registered assigns or successors in interest (the “Payee”), or order, the principal sum of Three Hundred Thousand Dollars ($300,000) or such lesser amount as shall have been
        advanced by Payee to Maker and shall remain unpaid under this Note on the Maturity Date (as defined below) in lawful money of the United States of America, on the terms and conditions described below. All payments on this Note shall be made by
        check or wire transfer of immediately available funds or as otherwise determined by the Maker to such account as the Payee may from time to time designate by written notice in accordance with the provisions of this Note.

      

      

      1. Principal. The entire unpaid principal balance of this Note shall be payable on the earlier of: (i) December 31, 2020 or (ii) the date on which Maker
        consummates an initial public offering of its securities (such earlier date of (i) and (ii), the “Maturity Date”). The principal balance may be prepaid at any time. Under no circumstances shall any
        individual, including but not limited to any officer, director, employee or shareholder of the Maker, be obligated personally for any obligations or liabilities of the Maker hereunder.

      

      

      2. Drawdown Requests. Maker and Payee agree that Maker may request, from time to time, up to Three Hundred Thousand Dollars ($300,000) in drawdowns under
        this Note to be used for costs and expenses related to Maker’s formation and the proposed initial public offering of its securities (the “IPO”). Principal of this Note may be drawn down from time to time
        prior to the Maturity Date upon written request from Maker to Payee (each, a “Drawdown Request”). Each Drawdown Request must state the amount to be drawn down, and must not be an amount less than Ten Thousand
        Dollars ($10,000), unless agreed upon in writing by Maker and Payee. Payee shall fund each Drawdown Request no later than three (3) business days after receipt of a Drawdown Request; provided, however, that the maximum amount of drawdowns
        outstanding under this Note at any time may not exceed Three Hundred Thousand Dollars ($300,000). No fees, payments or other amounts shall be due to Payee in connection with, or as a result of, any Drawdown Request by Maker.

      

      

      3. Interest. No interest shall accrue on the unpaid principal balance of this Note.

      

      

      4. Application of Payments. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under this Note,
        including (without limitation) reasonable attorney’s fees, then to the payment in full of any late charges and finally to the reduction of the unpaid principal balance of this Note.

      

      

      5. Events of Default. The following shall constitute an event of default (“Event of Default”):

      

      

      (a) Failure to Make Required Payments. Failure by Maker to pay the principal amount due pursuant to this Note within five (5) business days of the date specified above.

      

      

      (b) Voluntary Bankruptcy, Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation or other similar law, or the consent
        by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for the
        benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action by Maker in furtherance of any of the foregoing.

      

      

      (c) Involuntary Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in an involuntary case under any applicable
        bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation of
        its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive days.

      

      

      6. Remedies.

      

      

      (a) Upon the occurrence of an Event of Default specified in Section 5(a) hereof, Payee may, by written notice to Maker, declare this Note to be due immediately and payable, whereupon the unpaid
        principal amount of this Note, and all other amounts payable thereunder, shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly waived, anything contained herein
        or in the documents evidencing the same to the contrary notwithstanding.

      

      

      (b) Upon the occurrence of an Event of Default specified in Sections 5(b) or 5(c), the unpaid principal balance of this Note, and all other sums payable with regard to this Note, shall
        automatically and immediately become due and payable, in all cases without any action on the part of Payee.

      

      

      7. Waivers. Maker and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest, and
        notice of protest with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the terms of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any
        property, real or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or providing for any stay of execution, exemption from civil process, or extension of time for
        payment; and Maker agrees that any real estate that may be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued hereon, may be sold upon any such writ in whole or in part in any order desired by Payee.

      
        
          


      

      8. Unconditional Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement of the payment
        of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party, and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or
        consented to by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the payment or other provisions of this Note, and agrees that additional makers, endorsers,
        guarantors, or sureties may become parties hereto without notice to Maker or affecting Maker’s liability hereunder.

      

      

      9. Notices. All notices, statements or other documents which are required or contemplated by this Agreement shall be: (i) in writing and delivered
        personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in writing, (ii) by facsimile to the number most recently provided to such party or such
        other address or fax number as may be designated in writing by such party or (iii) by electronic mail, to the electronic mail address most recently provided to such party or such other electronic mail address as may be designated in writing by such
        party. Any notice or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt of written confirmation, if sent by facsimile or electronic
        transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent by mail.

      

      

      10. Construction. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW
        PROVISIONS THEREOF.

      

      

      11. Severability. Any provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be
        ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in
        any other jurisdiction.

      

      

      12. Trust Waiver. Notwithstanding anything herein to the contrary, the Payee hereby waives any and all right, title, interest or claim of any kind (“Claim”) in or to any distribution of or from the trust account to be established in which the proceeds of the IPO conducted by the Maker (including the deferred underwriters discounts and commissions) and the
        proceeds of the sale of the warrants issued in a private placement to occur prior to the consummation of the IPO are to be deposited, as described in greater detail in the registration statement and prospectus to be filed with the Securities and
        Exchange Commission in connection with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the trust account for any reason whatsoever.

      

      

      13. Amendment; Waiver. Any amendment hereto or waiver of any provision hereof may be made with, and only with, the written consent of the Maker and the
        Payee.

      

      

      14. Assignment. No assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or
        otherwise) without the prior written consent of the other party hereto and any attempted assignment without the required consent shall be void.

      

      

      [Signature page follows]

      
        
          


      

      IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused this Note to be duly executed by the undersigned as of the day and year first above written.

      

      

      	 	
              LONGVIEW ACQUISITION CORP.,

              a Delaware corporation

            
	 	 	 
	 	
              By:

            	
              /s/ Mark Horowitz

            
	 	 	
              Name: Mark Horowitz

            
	 	 	
              Title:   Chief Financial Officer

            


      

      

      Accepted and agreed this 12th day of February, 2020

      

      

      	
              LONGVIEW INVESTORS LLC,

              a Delaware limited liability company

            
	 	 
	
              By:

            	
              /s/ Mark Horowitz

            
	 	
              Name: Mark Horowitz

            
	 	
              Title:   Authorized Person

            


      

      

      
        [Signature Page to Promissory Note]