Exhibit 10.28

  

  

  NEITHER THE SECURITIES REPRESENTED BY THIS NOTE NOR THE SECURITIES ISSUABLE UPON THE CONVERSION OF THIS NOTE HAVE BEEN REGISTERED UNDER THE
      SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR ANY STATE SECURITIES LAWS, AND NEITHER SUCH SECURITIES NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD,
      ASSIGNED OR OTHERWISE TRANSFERRED UNLESS (1) A REGISTRATION STATEMENT WITH RESPECT THERETO IS EFFECTIVE UNDER THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS, OR (2) AN EXEMPTION FROM SUCH REGISTRATION EXISTS AND THE MAKER RECEIVES AN OPINION OF
      COUNSEL TO THE HOLDER OF SUCH SECURITIES, WHICH COUNSEL AND OPINION ARE SATISFACTORY TO THE COMPANY, THAT SUCH SECURITIES MAY BE OFFERED, SOLD, PLEDGED, ASSIGNED OR TRANSFERRED IN THE MANNER CONTEMPLATED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
      UNDER THE ACT OR APPLICABLE STATE SECURITIES LAWS.

  

  

  AMENDMENT No. 3 TO CONVERTIBLE PROMISSORY NOTE

  

  

  	
          $4,000,000

        	
          Athens, Greece

        
	 	
          March 26, 2019

        


  

  

  This amendment (the “Amendment



          No. 3”) to a Convertible Promissory Note dated as of March 12, 2015, as amended by Amendment No. 1 dated as of May 14, 2015 and as further amended by Amendment No. 2 dated as of September 18, 2017, is entered into by and between
      Seanergy Maritime Holdings Corp., a corporation organized under the laws of the Republic of the Marshall Islands, (the “Maker”), and
      investor set forth in Schedule 1 attached hereto, or its respective registered assigns (the “Holder”).

  

  

  

  

  BACKGROUND

  

  

  WHEREAS, on March 12, 2015 the Maker
      executed a promissory note in the principal amount of USD$4,000,000 in favour of the Holder (the “Initial Note”);

  

  

  WHEREAS, on May 14, 2015 and on
      September 18, 2017, the parties entered into Amendment No. 1 and Amendment No. 2 respectively, pursuant to which certain sections of the Initial Note were amended and restated (together with the Initial Note, Amendment No.1 and Amendment No.2, the “Promissory Note”);

  

  

  WHEREAS, each of the parties hereto
      wishes to amend the repayment schedule and the prepayment section of the Promissory Note, as described in detail below; and

  

  

  NOW THEREFORE, in consideration of the
      foregoing and for other consideration the receipt and sufficiency of which is hereby acknowledged, the parties hereto intending to be legally bound hereby agree as follows:

  
    
      


  

  
  

  

  AGREEMENT

  

  

  1. In Section 1 of the Promissory Note
      the definition of “Maturity Date” is hereby deleted in its entirety and replaced with the following:

  

  

  “1.4 “Maturity Date” shall mean 31 December 2020.”

  

  

  

  

  2. Section 5 of the Promissory Note is
      hereby deleted in its entirety and replaced with the following:

  

  

              “5.    Repayment.
      The aggregate of all the outstanding principal amount under this Note shall be repaid by the Maker in one bullet payment on the Maturity Date whereupon the Note shall be cancelled.”

  3. Section



      6 of the Note is deleted in its entirety and replaced with the following:

  

  

  “6.  Voluntary



        Prepayment. The Maker may, by giving a five (5) business days prior written notice to the Holder, at any time thereafter prepay the whole or any part of this Note in cash or, subject to the Holder’s prior written agreement on price per
      share, in a number of fully paid and nonassessable shares of the Maker Common Stock equal to the amount of the Note being prepaid divided by the agreed price per share.”

  4. The term “this Note” as used in the
      Promissory Note shall be read and construed as reference to the Promissory Note, as amended hereby.

  

  

  5. The parties hereto acknowledge and
      confirm that other than as amended herein, the Promissory Note shall remain in full force and effect and shall continue to evidence, guarantee and support their respective obligations.

  

  

  6. Maker’s Representations and
      Warranties: the Maker hereby warrants and represents to the Holder as follows:

  

  

  (a) To the best of Maker's knowledge and belief, after giving effect to this Amendment No. 3, no
      default has occurred under the Promissory Note nor has any event occurred or failed to occur which, with the passage of time or the giving of notice or both, would comprise such a default;

  (b) There are no offsets, counterclaims or defenses against the indebtedness evidenced by the Note, as
      modified hereby;

  (c) The Maker has full power, authority and legal right to execute this Amendment No. 3 and to keep and
      observe all of the terms of this Amendment No. 3 to be observed or performed by the Maker; and

  
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  (d) There are no actions, suits or proceedings pending or, to the knowledge of Maker, threatened against or affecting the
      Maker or involving the validity or enforceability of the Promissory Note, at law or in equity, and the Maker is not operating under, or subject to, or in default of, or in violation with respect to, any order, writ, injunction, decree or demand of
      any court or any governmental authorities.

  

  

  7. Holder’s Representations and
      Warranties: the Holder hereby warrants and represents to the Maker that the Holder has full power, authority and legal right to execute this Amendment No. 3 and to keep and observe all of the terms of this Amendment No. 3 to be observed or performed
      by the Holder.

  

  

  8. This Amendment No. 3 may be executed
      by the parties hereto in separate counterparts, each of which, when so executed and delivered, shall be an original, but all such counterparts shall together constitute on and the same instrument. All such counterparts may be delivered among the
      parties hereto be facsimile or other electronic transmission, which shall not affect the validity thereof.

  

  

  9. This Amendment No. 3 shall be
      governed by and construed in accordance with the internal laws of the State of New York (without reference to the conflicts of law provisions thereof). Any dispute regarding this Amendment No. 3 shall be exclusively referred to arbitration in London
      and conducted in accordance with the Arbitration Act 1996 (England and Wales) or any statutory modification or re-enactment thereof, and the parties agree to submit to the personal and exclusive jurisdiction and venue of such arbitrators. Any and all
      disputes hereunder shall be referred by the parties hereto to three arbitrators, each party to appoint one arbitrator and the two so appointed shall appoint the third who shall act as chairman of such panel of arbitrators.  Upon receipt by one party
      of the nomination in writing of such other party’s arbitrator, that party shall appoint its arbitrator within ten days, failing which the decision of the single arbitrator appointed shall apply. The two arbitrators so appointed shall appoint the
      third arbitrator within ten days, failing which the third arbitrator shall be appointed by the President of the London Maritime Arbitrators Association (“LMAA”)



      at the time within twenty-one days of the two arbitrators being appointed. The arbitration shall be conducted in accordance with the terms of the LMAA then in effect.  The parties agree that any tribunal constituted under this Amendment No. 3 shall
      have the power to order consolidation of proceedings or concurrent hearings in relation to any and all disputes arising out of or in connection with the Promissory Note or the other documents contemplated thereby, which involve common questions of
      fact or law, and to make any orders ancillary to the same, including, without limitation, any orders relating to the procedures to be followed by the parties in any such consolidated proceedings or concurrent hearings. Consolidated disputes are to be
      heard by a maximum of three arbitrators, each party to have the right to appoint one arbitrator. In case a dispute arises as to whether consolidation is appropriate (including without limitation conflicting orders of relevant tribunals) and/or as to
      the constitution of the tribunal for any such consolidated proceedings, each party shall have the right to apply to the President for the time being of the LMAA for final determination of the consolidation of the proceedings and/or constitution of
      such tribunal.

  
    3

    
      


  

  

  

  10. Capitalized terms used but not
      defined herein shall have the meanings ascribed to them in the Promissory Note.

  

  

  

  

  IN WITNESS WHEREOF,
      the Maker and the Holder have caused this Amendment No. 3 to be executed as of the first date written above.

  

  

  

  

  	 	
          THE MAKER:

        
	 	 
	 	
          SEANERGY MARITIME HOLDINGS CORP.

        
	 	 
	 	 
	 	 
	 	
          By:

        	/s/ Stamatios Tsantanis
	 	
          Name:

        	
          Stamatios Tsantanis

        
	 	
          Title:

        	
          Chief Executive Officer

        
	 	 	 
	 	 
	 	 
	 	
          THE HOLDER:

        
	 	 
	 	
          JELCO DELTA HOLDING CORP.

        
	 	 
	 	 
	 	
          By:

        	/s/ Alastair Macdonald
	 	
          Name:

        	
          Alastair Macdonald

        
	 	
          Title:

        	
          Director

        
	 	 	 


  

  

  

  

  

  

  
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  SCHEDULE 1

  

  

  	
          
            Name and Address of Investor 

            

          

        	
          
            Principal Amount Owned as of 26 March  2019 

            

          

        
	
           

            

          Jelco Delta Holding Corp.

          c/o Western Isles

          Jardine House, 4th Floor,

          33-35 Reid Street

          P.O. Box HM 1431

          Hamilton HM FX, Bermuda

        	
           

            

          $3,800,000

        


  

  

  

  

  

  

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