EX-4.3





 Exhibit 4.3 

Form of Underwriter’s Warrant 
 THE
REGISTERED HOLDER OF THIS PURCHASE WARRANT BY ITS ACCEPTANCE HEREOF, AGREES THAT IT WILL NOT SELL, TRANSFER OR ASSIGN THIS PURCHASE WARRANT EXCEPT AS HEREIN PROVIDED AND THE REGISTERED HOLDER OF THIS PURCHASE WARRANT AGREES THAT IT WILL NOT SELL,
TRANSFER, ASSIGN, PLEDGE OR HYPOTHECATE THIS PURCHASE WARRANT FOR A PERIOD OF ONE HUNDRED EIGHTY DAYS FOLLOWING THE LATER OF THE EFFECTIVE DATE (AS DEFINED BELOW) OR THE COMMENCEMENT OF SALES OF THE OFFERING TO WHICH THIS PURCHASE WARRANT RELATES TO
ANYONE OTHER THAN (I) ROTH CAPITAL PARTNERS, LLC OR AN UNDERWRITER OR A SELECTED DEALER IN CONNECTION WITH THE OFFERING, OR (II) A BONA FIDE OFFICER OR PARTNER OF ROTH CAPITAL PARTNERS, LLC OR OF ANY SUCH UNDERWRITER OR SELECTED DEALER.

 THIS PURCHASE WARRANT IS NOT EXERCISABLE PRIOR TO [•], 2020 [DATE THAT IS 180 DAYS FROM THE EFFECTIVE DATE OF THE OFFERING]. VOID AFTER 5:00
P.M., EASTERN TIME, [•], 2025 [DATE THAT IS FIVE YEARS FROM THE EFFECTIVE DATE OF THE OFFERING]. 
 COMMON STOCK PURCHASE
WARRANT 
 For the Purchase of [_____]Common Shares 

of 
 MYOMO, INC. 

1. Purchase Warrant. THIS CERTIFIES THAT, for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Roth
Capital Partners, LLC (“Holder”), as registered owner of this Purchase Warrant, is entitled, at any time or from time to time from [•], 2020 [DATE THAT IS ONE HUNDRED EIGHTY (180) DAYS FROM THE EFFECTIVE
DATE OF THE OFFERING] (the “Commencement Date”), and at or before 5:00 p.m., Eastern time, [•], 2025 [DATE THAT IS FIVE YEARS FROM THE EFFECTIVE DATE OF THE OFFERING] (the ”Expiration Date”),
but not thereafter, to subscribe for, purchase and receive, in whole or in part, up to [____] (the “Shares”) of common stock, par value $0.0001 per share (the “Common Stock”), of Myomo, Inc., a Delaware corporation
(the “Company”), subject to adjustment as provided in Section 6 hereof. If the Expiration Date is a day on which banking institutions are authorized or required by law or executive order to close, then this Purchase Warrant may
be exercised on the next succeeding day which is not such a day in accordance with the terms herein. During the period ending on the Expiration Date, the Company agrees not to take any action that would terminate this Purchase Warrant. This Purchase
Warrant is initially exercisable at $7.00 per Share; provided, however, that upon the occurrence of any of the events specified in Section 6 hereof, the rights granted by this Purchase Warrant, including the exercise price per
Share and the number of Shares to be received upon such exercise, shall be adjusted as therein specified. This Purchase Warrant is being issued in connection with a public offering of shares of Common Stock pursuant to the Company’s
registration statement on Form S-1 (File No.: 333-235538) (the “Offering”). The term “Exercise Price” shall mean the initial exercise
price or the adjusted exercise price, depending on the context. As used herein, “Effective Date” means the date on which the Shares being sold in the Offering first become legally eligible for distribution to the public as
determined in accordance with FINRA Conduct Rule 5110(a)(12). 












 2. Exercise. 

2.1 Exercise Form. In order to exercise this Purchase Warrant, the exercise form attached hereto must be duly executed and completed
and delivered to the Company, together with this Purchase Warrant and payment of the Exercise Price for the Shares being purchased payable in cash by wire transfer of immediately available funds to an account designated by the Company or by
certified check or official bank check. If the subscription rights represented hereby shall not be exercised at or before 5:00 p.m., Eastern time, on the Expiration Date, this Purchase Warrant shall become and be void without further force or
effect, and all rights represented hereby shall cease and expire. 
 2.2 Cashless Exercise. If at any time there is no effective
registration statement registering, or no current prospectus available for, the resale of the Shares by the Holder, the Holder may, in its sole discretion, in lieu of exercising this Purchase Warrant by payment of cash or check payable to the order
of the Company pursuant to Section 2.1 above, Holder may elect to receive the number of Shares equal to the value of this Purchase Warrant (or the portion thereof being exercised), by surrender of this Purchase Warrant to the Company, together
with the exercise form attached hereto, in which event the Company will issue to Holder Shares in accordance with the following formula: 
  

									
	            X	  	=    	  	Y(A-B)
	  	      A
				
	
            Where,
	  		  		  	
	 	  	X	  	=	  	The number of Shares to be issued to Holder;
	 	  	Y	  	=	  	The number of Shares for which the Purchase Warrant is being exercised;
	 	  	A	  	=	  	The fair market value of one Share; and
	 	  	B	  	=	  	The Exercise Price.

 For purposes of this Section 2.2, the fair market value of a Share is defined as follows: 

 

	 	(i)	 if the Common Shares are traded on a securities exchange, the value shall be deemed to be the closing price on
such exchange on the trading day prior to the exercise form being submitted in connection with the exercise of the Purchase Warrant; or 


  

	 	(ii)	 if the Common Shares are actively traded
over-the-counter, the value shall be deemed to be the closing bid on the trading day prior to the exercise form being submitted in connection with the exercise of the
Purchase Warrant; if there is no active public market in the United States, the value shall be the fair market value thereof, as determined in good faith by the Company’s Board of Directors. 



  
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 For the avoidance of doubt, there are no alternative cash settlement options available to the Holder in the
event there is not an effective registration statement at the time of exercise. 
 3. Transfer. 

The registered Holder of this Purchase Warrant agrees by his, her or its acceptance hereof, that such Holder will not: (a) sell, transfer, assign, pledge
or hypothecate this Purchase Warrant for a period of one hundred eighty (180) days following the later of the Effective Date or the commencement of sales of the offering to which this Purchase Warrant relates (the later of such dates, the
“Transferability Date”) to anyone other than: (i) Roth Capital Partners, LLC (“Roth”) or an underwriter or a selected dealer participating in the Offering, or (ii) a bona fide officer or partner of Roth or
of any such underwriter or selected dealer, in each case in accordance with FINRA Conduct Rule 5110(g)(1), or (b) cause this Purchase Warrant or the securities issuable hereunder to be the subject of any hedging, short sale, derivative, put or
call transaction that would result in the effective economic disposition of this Purchase Warrant or the securities hereunder, except as provided for in FINRA Rule 5110(g)(2). On and after the Transferability Date, transfers to others may be made
subject to compliance with or exemptions from applicable securities laws. In order to make any permitted assignment, the Holder must deliver to the Company the assignment form attached hereto duly executed and completed, together with the Purchase
Warrant and payment of all transfer taxes, if any, payable in connection therewith. The Company shall within five (5) Business Days transfer this Purchase Warrant on the books of the Company and shall execute and deliver a new Purchase Warrant
or Purchase Warrants of like tenor to the appropriate assignee(s) expressly evidencing the right to purchase the aggregate number of Shares purchasable hereunder or such portion of such number as shall be contemplated by any such assignment. The
registered Holder of this Purchase Warrant agrees by his, her or its acceptance hereof, that such Holder will not sell, transfer, assign, pledge or hypothecate this Purchase Warrant. 

4. Reserved. 
 5. New Purchase Warrants to be Issued.

 5.1 Partial Exercise. Subject to the restrictions in Section 3 hereof, this Purchase Warrant may be exercised in whole or in
part. In the event of the exercise hereof in part only, upon surrender of this Purchase Warrant for cancellation, the Company shall cause to be delivered to the Holder without charge a new Purchase Warrant of like tenor to this Purchase Warrant in
the name of the Holder evidencing the right of the Holder to purchase the number of Shares purchasable hereunder as to which this Purchase Warrant has not been exercised. 

5.2 Lost Certificate. Upon receipt by the Company of evidence satisfactory to it of the loss, theft, destruction or mutilation of this
Purchase Warrant and of reasonably satisfactory indemnification or the posting of a bond, the Company shall execute and deliver a new Purchase Warrant of like tenor and date. Any such new Purchase Warrant executed and delivered as a result of such
loss, theft, mutilation or destruction shall constitute a substitute contractual obligation on the part of the Company. 

  
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 6. Adjustments. 

6.1 Adjustments to Exercise Price and Number of Securities. The Exercise Price and the number of Shares underlying the Purchase Warrant
shall be subject to adjustment from time to time as hereinafter set forth: 
 6.1.1 Share Dividends; Split Ups. If, after the date
hereof, and subject to the provisions of Section 6.3 below, the number of outstanding Shares is increased by a stock dividend payable in Shares or by a split up of Shares or other similar event, then, on the effective day thereof, the number of
Shares purchasable hereunder shall be increased in proportion to such increase in outstanding Shares, and the Exercise Price shall be proportionately decreased. 

6.1.2 Aggregation of Shares. If, after the date hereof, and subject to the provisions of Section 6.3 below, the number of
outstanding Shares is decreased by a consolidation, combination, reverse stock split or reclassification of Shares or other similar event, then, on the effective date thereof, the number of Shares purchasable hereunder shall be decreased in
proportion to such decrease in outstanding Shares, and the Exercise Price shall be proportionately increased. 
 6.1.3 Replacement of
Securities upon Reorganization, etc. In case of any reclassification or reorganization of the outstanding Shares other than a change covered by Section 6.1.1 or 6.1.2 hereof or that solely affects the par value of such Shares, or in the
case of any merger or consolidation of the Company with or into another corporation which has been approved by the Board of Directors (other than a merger or consolidation in which the Company is the continuing corporation and that does not result
in any reclassification or reorganization of the outstanding Shares), or in the case of any sale or conveyance to another corporation or entity of the property of the Company as an entirety or substantially as an entirety in connection with which
the Company is dissolved, the Holder of this Purchase Warrant shall have the right thereafter (until the expiration of the right of exercise of this Purchase Warrant) to receive upon the exercise hereof, for the same aggregate Exercise Price payable
hereunder (as adjusted pursuant to this Section 6.1.3) immediately prior to such event, the kind and amount of shares of stock or other securities or property (including cash) receivable upon such reclassification, reorganization, share
reconstruction or amalgamation, or consolidation, or upon a dissolution following any such sale or transfer, by a Holder of the number of Shares of the Company obtainable upon exercise of this Purchase Warrant immediately prior to such event; and if
any reclassification also results in a change in Shares covered by Section 6.1.1 or 6.1.2, then such adjustment shall be made pursuant to Sections 6.1.1, 6.1.2 and this Section 6.1.3. The provisions of this Section 6.1.3 shall
similarly apply to successive reclassifications, reorganizations, share reconstructions or amalgamations, or consolidations, sales or other transfers. 

6.1.4 Changes in Form of Purchase Warrant. This form of Purchase Warrant need not be changed because of any change pursuant to this
Section 6.1, and Purchase Warrants issued after such change may state the same Exercise Price and the same number of Shares as are stated in the Purchase Warrants initially issued pursuant to this Agreement. The acceptance by any Holder of the
issuance of new Purchase Warrants reflecting a required or permissive change shall not be deemed to waive any rights to an adjustment occurring after the Commencement Date or the computation thereof. 

6.2 Substitute Purchase Warrant. In case of any merger or consolidation of the Company with or into another corporation (other than a
merger or consolidation which does not result in any reclassification or change of the outstanding Shares), the corporation formed by such merger or consolidation shall execute and deliver to the Holder a supplemental Purchase Warrant providing that
the holder of each Purchase Warrant then outstanding or to be outstanding shall have the right thereafter (until the stated expiration of such Purchase Warrant) to receive, upon exercise of such Purchase Warrant, the kind and amount of shares of
stock and other securities and property receivable upon such merger or consolidation, by a holder of the number of Shares of the Company for which such Purchase Warrant might have been exercised immediately prior to such merger or consolidation,
sale or transfer. Such supplemental Purchase Warrant shall provide for adjustments which shall be identical to the adjustments provided for in this Section 6. The above provision of this Section shall similarly apply to successive mergers or
consolidations. 

  
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 6.3 Elimination of Fractional Interests. The Company shall not be required to issue
certificates representing fractions of Shares upon the exercise of the Purchase Warrant, nor shall it be required to issue scrip or pay cash in lieu of any fractional interests, it being the intent of the parties that all fractional interests shall
be eliminated by rounding any fraction up or down, as the case may be, to the nearest whole number of Shares or other securities, properties or rights. 

7. Reservation and Listing. The Company shall at all times reserve and keep available out of its authorized Shares, solely for the purpose of issuance
upon exercise of the Purchase Warrants, such number of Shares or other securities, properties or rights as shall be issuable upon the exercise thereof. The Company covenants and agrees that, upon exercise of the Purchase Warrants and payment of the
Exercise Price therefor, in accordance with the terms hereby, all Shares and other securities issuable upon such exercise shall be duly and validly issued, fully paid and non-assessable and not subject to
preemptive rights of any shareholder. As long as the Purchase Warrants shall be outstanding, the Company shall use its commercially reasonable efforts to cause all Shares issuable upon exercise of the Purchase Warrants to be listed (subject to
official notice of issuance) on all national securities exchanges (or, if applicable, on the OTC Markets or any successor trading market) on which the Shares issued to the public in the Offering may then be listed and/or quoted. 

8. Certain Notice Requirements. 
 8.1
Holder’s Right to Receive Notice. Nothing herein shall be construed as conferring upon the Holders the right to vote or consent or to receive notice as a shareholder for the election of directors or any other matter, or as
having any rights whatsoever as a shareholder of the Company. If, however, at any time prior to the expiration of the Purchase Warrants and their exercise, any of the events described in Section 8.2 shall occur, then, in one or more of said
events, the Company shall give written notice of such event at least five days prior to the date fixed as a record date or the date of closing the transfer books for the determination of the shareholders entitled to such dividend, distribution,
conversion or exchange of securities or subscription rights, or entitled to vote on such proposed dissolution, liquidation, winding up or sale. Such notice shall specify such record date or the date of the closing of the transfer books, as the case
may be. Notwithstanding the foregoing, the Company shall deliver to each Holder a copy of each notice given to the other shareholders of the Company at the same time and in the same manner that such notice is given to the shareholders. 

8.2 Events Requiring Notice. The Company shall be required to give the notice described in this Section 8 upon one or more of the
following events: (i) if the Company shall take a record of the holders of its Shares for the purpose of entitling them to receive a dividend or distribution payable otherwise than in cash, or a cash dividend or distribution payable otherwise
than out of retained earnings, as indicated by the accounting treatment of such dividend or distribution on the books of the Company, (ii) the Company shall offer to all the holders of its Shares any additional shares of capital stock of the
Company or securities convertible into or exchangeable for shares of capital stock of the Company, or any option, right or warrant to subscribe therefor, or (iii) a dissolution, liquidation or winding up of the Company (other than in connection
with a consolidation or share reconstruction or amalgamation) or a sale of all or substantially all of its property, assets and business shall be proposed. Failure to give such notice shall not invalidate any such action. 

8.3 Notice of Change in Exercise Price. The Company shall, promptly after an event requiring a change in the Exercise Price pursuant to
Section 6 hereof, send notice to the Holders of such event and change (“Price Notice”). The Price Notice shall describe the event causing the change and the method of calculating same and shall be certified as being true and
accurate by the Company’s Principal Financial Officer. 

  
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 8.4 Transmittal of Notices. All notices, requests, consents and other communications
under this Purchase Warrant shall be in writing and shall be deemed to have been duly made when hand delivered, or mailed by express mail or private courier service: (i) if to the registered Holder of the Purchase Warrant, to the address of
such Holder as shown on the books of the Company, or (ii) if to the Company, to following address or to such other address as the Company may designate by notice to the Holders: 

If to the Holder: 
 Roth Capital
Partners, LLC 
 888 San Clemente Drive 

Newport Beach, CA 92660 
 Attn:
Robert Stephenson 
 Fax No.: (949) 720-7223 

If to the Company: 
 One Broadway,
14th Floor 
 Cambridge, MA 02142 

Attn: Chief Executive Officer 

Fax No: (617) 886-0333 

9. Miscellaneous. 
 9.1
Amendments. The Company and Roth may from time to time supplement or amend this Purchase Warrant without the approval of any of the Holders in order to cure any ambiguity, to correct or supplement any provision contained herein that may be
defective or inconsistent with any other provisions herein, or to make any other provisions in regard to matters or questions arising hereunder that the Company and Roth may deem necessary or desirable and that the Company and Roth deem shall not
adversely affect the interest of the Holders. All other modifications or amendments shall require the written consent of and be signed by the party against whom enforcement of the modification or amendment is sought. 

9.2 Headings. The headings contained herein are for the sole purpose of convenience of reference, and shall not in any way limit or
affect the meaning or interpretation of any of the terms or provisions of this Purchase Warrant. 
 9.3. Entire Agreement. This
Purchase Warrant (together with the other agreements and documents being delivered pursuant to or in connection with this Purchase Warrant) constitutes the entire agreement of the parties hereto with respect to the subject matter hereof, and
supersedes all prior agreements and understandings of the parties, oral and written, with respect to the subject matter hereof. 
 9.4
Binding Effect. This Purchase Warrant shall inure solely to the benefit of and shall be binding upon, the Holder and the Company and their respective successors, assigns and legal representatives, and no other person shall have or be
construed to have any legal or equitable right, remedy or claim under or in respect of or by virtue of this Purchase Warrant or any provisions herein contained. 

  
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 9.5 Governing Law; Submission to Jurisdiction; Trial by Jury. This Purchase Warrant
shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving effect to conflict of laws principles thereof. The Company hereby agrees that any action, proceeding or claim against it arising out
of, or relating in any way to this Purchase Warrant shall be brought and enforced in the New York Supreme Court, County of New York, or in the United States District Court for the Southern District of New York, and irrevocably submits to such
jurisdiction, which jurisdiction shall be exclusive. The Company hereby waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum. The Company and the Holder agree that the prevailing party(ies) in any
such action shall be entitled to recover from the other party(ies) all of its reasonable attorneys’ fees and expenses relating to such action or proceeding and/or incurred in connection with the preparation therefor. The Company (on its behalf
and, to the extent permitted by applicable law, on behalf of its stockholders and affiliates) and the Holder hereby irrevocably waive, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding
arising out of or relating to this Agreement or the transactions contemplated hereby. 
 9.6 Waiver, etc. The failure of the Company
or the Holder to at any time enforce any of the provisions of this Purchase Warrant shall not be deemed or construed to be a waiver of any such provision, nor to in any way affect the validity of this Purchase Warrant or any provision hereof or the
right of the Company or any Holder to thereafter enforce each and every provision of this Purchase Warrant. No waiver of any breach, non-compliance or non-fulfillment of
any of the provisions of this Purchase Warrant shall be effective unless set forth in a written instrument executed by the party or parties against whom or which enforcement of such waiver is sought; and no waiver of any such breach, non-compliance or non-fulfillment shall be construed or deemed to be a waiver of any other or subsequent breach, non-compliance or non-fulfillment. 
 9.7 Execution in Counterparts. This Purchase Warrant may be executed in one or
more counterparts, and by the different parties hereto in separate counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one and the same agreement, and shall become effective when one or
more counterparts has been signed by each of the parties hereto and delivered to each of the other parties hereto. Such counterparts may be delivered by facsimile transmission or other electronic transmission. 

9.8 Exchange Agreement. As a condition of the Holder’s receipt and acceptance of this Purchase Warrant, Holder agrees that, at any
time prior to the complete exercise of this Purchase Warrant by Holder, if the Company and Roth enter into an agreement (“Exchange Agreement”) pursuant to which they agree that all outstanding Purchase Warrants will be exchanged for
securities or cash or a combination of both, then Holder shall agree to such exchange and become a party to the Exchange Agreement. 

[Signature Page Follows] 

  
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 IN WITNESS WHEREOF, the Company has caused this Purchase Warrant to be signed by its duly
authorized officer as of the [    ] day of [    ], 2020. 
  

					
	       	 	MYOMO, INC.
			
		 	By:	 	 
		 		 	Name:
		 		 	Title:


  
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 [Form to be used to exercise Purchase Warrant] 

Date:             , 202     

The undersigned hereby elects irrevocably to exercise the Purchase Warrant for ______ shares of Common Stock (the
“Shares”) of Myomo, Inc., a Delaware corporation (the “Company”), and hereby makes payment of $____ (at the rate of $____ per Share) in payment of the Exercise Price pursuant thereto. Please issue the Shares as to
which this Purchase Warrant is exercised in accordance with the instructions given below and, if applicable, a new Purchase Warrant representing the number of Shares for which this Purchase Warrant has not been exercised. 

or 

The undersigned hereby elects irrevocably to convert its right to purchase ___ Shares of the Company under the Purchase Warrant
for ______ Shares, as determined in accordance with the following formula: 
  

									
	 	  	X	  	=	  	Y(A-B)	  	 
	  		  	  
	  	
	 	  	 	  	 	  	 A
  
	  	 
	 Where,
	  		  		  		  	
	 	  	X	  	=	  	The number of Shares to be issued to Holder;
	 	  	Y	  	=	  	The number of Shares for which the Purchase Warrant is being exercised;
	 	  	A	  	=	  	The fair market value of one Share which is equal to $_____; and
	 	  	B	  	=	  	The Exercise Price which is equal to $______ per share

 The undersigned agrees and acknowledges that the calculation set forth above is subject to
confirmation by the Company and any disagreement with respect to the calculation shall be resolved by the Company in its sole discretion. 

Please issue the Shares as to which this Purchase Warrant is exercised in accordance with the instructions given below and, if
applicable, a new Purchase Warrant representing the number of Shares for which this Purchase Warrant has not been converted. 
  

			
	 Signature
                                         
                                   
	 	
	
	 INSTRUCTIONS FOR REGISTRATION OF SECURITIES

		
	 Name:
                                         
                                     
	 	
	 (Print in Block Letters)
	 	
		
	 Address:
                                         
                                   
	 	
		
	
                   
                                         
                                
	 	
		
	
                   
                                         
                                
	 	


  
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