UNITED STATES
      SECURITIES AND EXCHANGE COMMISSION
      Washington, D.C. 20549
       
      
      
        
       
      
      SCHEDULE TO
      
      Tender Offer Statement under Section 14(d)(1)
      or 13(e)(1) of the Securities Exchange Act of 1934
       
      
      
       
      
      Zynerba Pharmaceuticals, Inc.
      (Name of Subject Company (Issuer))
      
      
      Xylophone Acquisition Corp.
      a wholly owned subsidiary of
      
      
      Harmony Biosciences Holdings, Inc.
      (Names of Filing Persons (Offerors))
      
      Common Stock, $0.001 par value per share
      (Title of Class of Securities)
      
      98986X109
      (CUSIP Number of Class of Securities)
       
      
      
       
      
      Christian Ulrich
      General Counsel and Corporate Secretary
      630 W. Germantown Pike, Suite 215
      Plymouth Meeting, PA 19462
      484-539-9800
      (Name, address, and telephone number of person
          authorized to receive notices and communications on behalf of filing persons)
      
       
      
      With copies to:
      William Intner
      Hogan Lovells US LLP
      100 International Drive
      Baltimore, MD 21202
      (410) 659-2700
        
      
      and to:
      Peter Cohen-Millstein
      Hogan Lovells US LLP
      390 Madison Avenue
      New York, NY 10017
      (212) 918-3000
       
      
      
       
      
      CALCULATION OF FILING FEE
       
      
      
          
            | Transaction Valuation* | Amount of Filing Fee* | 
          
            | N/A* | N/A* | 
      
      
      
      
        
            
              | * | Pursuant to General Instruction D to Schedule TO, a filing fee is not required in connection with this filing because it relates solely to preliminary communications made before the commencement of a tender offer. | 
        
       
      
      
      
          
            | ☐ | Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the form or
                schedule and the date of its filing. | 
      
       
      
      
          
            | Amount Previously Paid: N/A |  | Filing Party: N/A | 
          
            | Form of Registration No.: N/A |  | Date Filed: N/A | 
      
       
      
      
        
            
              | ☒ | Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. | 
        
       
       
      Check the appropriate boxes below to designate any transactions to which the statement relates:
       
      
      
          
            | 
 | ☒ | Third-party tender offer subject to Rule 14d-1. | 
      
      
          
            | 
 | ☐ | Issuer tender offer subject to Rule 13e-4. | 
      
      
          
            | 
 | ☐ | Going-private transaction subject to Rule 13e-3. | 
      
      
          
            | 
 | ☐ | Amendment to Schedule 13D under Rule 13d-2. | 
      
       
      Check the following box if the filing is a final amendment reporting the results of the tender offer: ☐
       
      If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:
       
      
      
          
            | 
 | ☐ | Rule 13e-4(i) (Cross-Border Issuer Tender Offer) | 
      
      
          
            | 
 | ☐ | Rule 14d-1(d) (Cross-Border Third-Party Tender Offer) | 
      
      
      
      
      This filing relates solely to preliminary communications made before the commencement of a planned tender offer by Xylophone Acquisition Corp. (“Merger Sub”), a direct, wholly-owned subsidiary of Harmony Biosciences Holdings, Inc. (“Parent” or
        “Harmony”), for all of the outstanding shares of common stock, par value $0.001 per share, of Zynerba Pharmaceuticals, Inc. (the “Company” or “Zynerba”), for (i) $1.1059 per share of common stock, in cash, subject to any applicable withholding of
        taxes and without interest, plus (ii) one contingent value right per share of common stock, subject to any applicable withholding of taxes and without interest, which represents the right to receive contingent payments, in cash, subject to any
        applicable withholding of taxes and without interest, upon the achievement of certain milestones set forth in, and subject to and in accordance with, the terms and conditions of the CVR Agreement (as defined in the Merger Agreement), and, in each
        case, on the terms and subject to the conditions of the Agreement and Plan of Merger, dated as of August 14, 2023 (the “Merger Agreement”), by and among Parent, Merger Sub and the Company.
       
      Forward Looking Statements
       
      This communication contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be
        considered forward-looking statements. These forward-looking statements, including as they relate to Harmony and Zynerba, the anticipated occurrence, manner and timing of the proposed transaction, the future development of their technologies and
        product candidates, including the development of and market opportunities for Zynerba’s technology and product candidates, the future value (if any) of the contingent value rights, Harmony’s strategy, and the anticipated synergies and benefits from
        the proposed transaction,  are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause actual results, performance or achievements to be materially different from any future
        results, performance or achievements expressed or implied by the forward-looking statements. Potential risks, uncertainties and other factors to be considered include, among others, that Zynerba stockholders may not tender a sufficient number of
        shares in the tender offer; the length of time necessary to consummate the proposed transaction may be longer than anticipated, or it may not be consummated at all; problems may arise in successfully integrating the business and technologies of
        Harmony and Zynerba, and Harmony may not realize the expected benefits of the proposed transaction; the proposed transaction may involve unexpected costs; the businesses may suffer as a result of uncertainty surrounding the proposed transaction,
        including difficulties in maintaining relationships with third parties or retaining key employees; and even if the transaction is consummated no contingent consideration may become payable. For further discussion of these and other risks and
        uncertainties, see Harmony’s and Zynerba’s most recent Form 10-K and Form 10-Q filings with the United States Securities and Exchange Commission (the “SEC”), including under the headings “Risk Factors.”  You are cautioned to not place undue
        reliance on forward-looking statements, which speak only as of the date of this document. Except as required by law, neither Harmony nor Zynerba is under any duty to update any of the information in this document.
       
      Additional Information and Where to Find It
       
      The tender offer referenced in this document has not yet commenced.  This document is for informational purposes only and is neither an offer to purchase nor a solicitation of an offer to sell shares of Zynerba, nor is it a substitute for the
        tender offer materials that Harmony and Merger Sub will file with the SEC upon commencement of the tender offer. At the time the tender offer is commenced, Harmony and Merger Sub will file tender offer materials on Schedule TO, and Zynerba will
        file a Solicitation/Recommendation Statement on Schedule 14D-9 with the SEC with respect to the tender offer. HOLDERS OF SHARES OF ZYNERBA COMMON STOCK ARE URGED TO READ THE TENDER OFFER MATERIALS (INCLUDING AN OFFER TO PURCHASE, A RELATED LETTER
        OF TRANSMITTAL AND CERTAIN OTHER TENDER OFFER DOCUMENTS) AND THE SOLICITATION/RECOMMENDATION STATEMENT WHEN THEY BECOME AVAILABLE (AS EACH MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME) BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION THAT
        HOLDERS OF SHARES OF ZYNERBA COMMON STOCK SHOULD CONSIDER BEFORE MAKING ANY DECISION REGARDING TENDERING THEIR SHARES. The Offer to Purchase, the related Letter of Transmittal and certain other tender offer documents, as well as the
        Solicitation/Recommendation Statement, will be made available to all holders of shares of Zynerba at no expense to them. The tender offer materials and the Solicitation/Recommendation Statement will be made available for free at the SEC’s website
        at www.sec.gov. In addition, these materials will be available at no charge on the Enhanced SEC Filings section of the Investor Relations page of Zynerba’s website at www.zynerba.com and by directing a request to the information agent for the
        tender offer, whose contact information will be set forth in the Offer to Purchase.
      
      
      
      EXHIBIT INDEX
       
      
      
          
            |  | Press Release issued by Harmony Biosciences, Inc., dated August 14, 2023. | 
          
            |  | Transcript from Parent Conference Call regarding the Proposed Acquisition, dated August 14, 2023. |