Document:

Exhibit 10.6

MYOMO, INC.

Amended and Restated Unsecured Term
Promissory Note

 

	$112,785.84	 	Original Issuance: May
25, 2011

Effective as of
September 1, 2015, this Amended and Restated Unsecured Term Promissory Note amends and restates that certain Unsecured Term Convertible
Promissory Note, dated May 25, 2011 in the original stated principal amount of $75,000 (the “Original Note”)
issued by Myomo, Inc. (“Maker”) to Steve Kelly (the “Original Note Holder”). Pursuant to that certain
Loan Transfer Agreement, dated January 2, 2015, the Original Note Holder assigned all rights, title and interest in and to the
Original Note to Sandcastle Limited Partnership (the “Lender”). As of the date of this Amended and Restated Unsecured
Term Promissory Note, the outstanding balance due on the Note, including principal and accrued, but unpaid interest, is ONE HUNDRED
TWELVE THOUSAND SEVEN HUNDRED EIGHTY FIVE AND 84/100 Dollars ($112,785.84).

 

FOR VALUE RECEIVED,
the undersigned Maker, promises to pay to the order of the Lender (or its successors and assigns), the sum of ONE HUNDRED TWELVE
THOUSAND SEVEN HUNDRED EIGHTY FIVE AND 84/100 Dollars ($112,785.84) plus interest as provided for herein in legal and lawful money
of the United States of America, from the date hereof until maturity at the times and place and in the manner specified below.

1.                 
Payments. The outstanding balance shall bear interest at a rate of ten percent (10%) per annum, compounded
annually based on a 365 day year, until such time as there is no amount outstanding hereunder. Beginning on September 1, 2016,
and continuing each calendar month thereafter through August 1, 2018, Maker shall, on or before the first day of such month, make
equal monthly payments to the Lender in the amount of FIVE THOUSAND SEVEN HUNDRED TWENTY FOUR AND 94/100 ($5,724.94), each such
payment to be allocated between principal, interest and charges as determined by the Lender. All outstanding amounts due under
the Note, if any, shall be due and payable on August 1, 2018.

2.                 
Payment Procedures. All unpaid principal and accrued interest under this Note shall be paid in lawful money
of the United States of America (in freely transferable U.S. dollars and in immediately available funds), at such place or places
identified by the Lender by wire transfer.

3.                 
Default. It is expressly provided that upon default in the punctual payment of this Note or any part thereof,
as the same shall become due and payable, then at the option of the Lender, if the defaulted amount is not paid within ten (10)
business days of written notice of default to Maker, the entire loan amount shall be matured, and all unpaid principal and interest
shall then become due and payable. In the event default is made in the prompt payment of this Note when due or declared due, and
the same is placed in the hands of an attorney for collection, or suit is brought on same, or the same is collected through probate,
bankruptcy or other judicial proceedings, then the Maker agrees and promises to pay reasonable attorney’s fees incurred in
the successful collection by Lender of amounts due hereunder.

Upon Maker’s
insolvency or business failure, the appointment of a receiver of all or any part of Maker’s property, an assignment for the
benefit of creditors of Maker, a calling of a meeting of creditors of Maker, the commencement of any proceeding under any bankruptcy,
insolvency or debtor relief laws by or against Maker which is not dismissed within 90 days, the holder hereof may, at its option,
declare the entirety of this Note immediately due and payable, and pursue any and all other remedies available to it at law or
inequity, but failure to do so at any time shall not constitute a waiver of such holder’s right to do so at any other time.
Failure to exercise this option shall not constitute a waiver of the right to exercise it in the event of any subsequent such events.

    Note 1
    - Page 1

     

    

4.                 
Waiver of Notice. The Maker of this Note expressly waives all notices of any kind or character, demands for
payment, presentations for payment, notices of intention to accelerate the maturity, protest and notice of protest, as to this
Note and as to each, every and all installments hereof.

5.                 
Maximum Rate. Nothing in this Note shall authorize the collection of interest in excess of the maximum interest
rate allowed by law.

6.                 
Notices. All notices required or permitted under this Promissory Note shall be in writing and shall be deemed
to have been delivered upon actual delivery at the addresses provided below, or by confirmed facsimile at the facsimile number
provided below. Either party may change its address or facsimile number upon five (5) days written notice to the other party.

 

	If to
Maker:	 	Myomo, Inc.
	 	 	One Broadway, 14th Floor
	 	 	Cambridge,
MA 02124

 

If to the Lender: at the address
provided below.

 

7.                 
Prepayment. Maker, at its option, may at any time upon thirty (30) days prior written notice to Lender, prepay
all or any portion of the amount due under the Note.

8.                 
Costs of Collection. Maker agrees to pay all costs and expenses incurred by the holder hereof, including all
reasonable attorneys’ fees, in connection with the collection of this Note and the indebtedness evidenced thereby, or the
enforcement of the holder’s rights hereunder.

9.                 
WAIVER OF TRIAL BY JURY. THE MAKER HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, AND THE LENDER BY ITS ACCEPTANCE
OF THIS PROMISSORY NOTE IRREVOCABLY AND UNCONDITIONALLY WAIVES, ANY AND ALL RIGHTS TO TRIAL BY JURY, IN ANY ACTION, SUIT OR COUNTERCLAIM
ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE RELATING TO THIS PROMISSORY NOTE.

10.             
Governing Law. This Note and all loan documents were negotiated in the Commonwealth of Massachusetts, and
the validity, enforceability, construction and interpretation of this Note shall be construed, applied, enforced and governed under
and by the laws of the Commonwealth of Massachusetts.

11.             
Amendment. Neither this Note nor any provision hereof may be altered, amended, modified, changed, waived,
discharged or terminated, except by and instrument signed by the Maker and the Lender,

12.             
Accredited investor Status. The undersigned Lender represents to the Maker that he, she or it is an “accredited
investor” as defined in Rule 501 of Regulation D as promulgated under the Securities Act of 1933, as amended, and that the
Lender has such knowledge, sophistication and experience in financial and business matters that the undersigned is able to bear
the economic risk of loss of its investment in the Maker, has been granted the opportunity to make a thorough investigation of
the affairs of the Maker, and has availed itself of such opportunity either directly or through its authorized representatives.

    Note 1
    - Page 2

     

    

Executed on the date and year first
above written.

	 	MAKER:
	 	 
	 	MYOMO, INC.
	 	 
	 	By:	/s/ Paul R. Gudonis
	 	Name:	Paul R. Gudonis
	 	Title: 	Chief Executive Officer

 

This Note is Accepted and Agreed
by the Undersigned Lender:

SANDCASTLE LIMITED PARTNERSHIP

 

	By:	/s/ Gregory A. Daoust	 
	Name:	Gregory A. Daoust	 
	Title: 	Duly Authorized	 

 

		Address:	355 Summer Street

Manchester, MA 01944

 

 

    Note 1
    - Page 3

     

    

 

MYOMO, INC.

Amended and Restated Unsecured Term
Promissory Note

 

	$362,441.77	 	Original Issuance: October
18, 2010

First Amendment: May 9, 2011

Second Amendment: October 12, 2011

 

Effective as of
September 1, 2015, this Amended and Restated Unsecured Term Promissory Note amends and restates that certain Unsecured Term Convertible
Promissory Note, dated October 18, 2010 in the original stated principal amount of $250,000, as amended by an Amended and Restated
Unsecured Term Convertible Promissory Note dated as of May 9, 2011, and a Second Amended and Restated Unsecured Term Promissory
Note dated as of October 12, 2011 (as so amended, the “Original Note”) issued by Myomo, Inc. (“Maker”)
to Steve Kelly (the “Original Note Holder”). Pursuant to that certain Loan Transfer Agreement, dated January
2, 2015, the Original Note Holder assigned all rights, title and interest in and to the Original Note to Sandcastle Limited Partnership
(the “Lender”). As of the date of this Amended and Restated Unsecured Term Promissory Note, the outstanding balance
due on the Note, including principal and accrued, but unpaid interest, is THREE HUNDRED SIXTY TWO THOUSAND FOUR HUNDRED FORTY-ONE
AND 77/100 DOLLARS ($362,441.77).

FOR VALUE RECEIVED,
the undersigned Maker, promises to pay to the order of the Lender (or its successors and assigns), the sum of THREE HUNDRED SIXTY
TWO THOUSAND FOUR HUNDRED FORTY-ONE AND 77/100 DOLLARS ($362,441.77) plus interest as provided for herein in legal and lawful money
of the United States of America, from the date hereof until maturity at the times and place and in the manner specified below.

1.                 
Payments. The outstanding balance shall bear interest at a rate of ten percent (10%) per annum, compounded
annually based on a 365 day year, until such time as there is no amount outstanding hereunder. Beginning on September 1, 2016,
and continuing each calendar month thereafter through August 1, 2018, Maker shall, on or before the first day of such month, make
equal monthly payments to the Lender in the amount of EIGHTEEN THOUSAND THREE HUNDRED NINETY SEVEN AND 33/100 ($18,397.33), each
such payment to be allocated between principal, interest and charges as determined by the Lender. All outstanding amounts due under
the Note, if any, shall be due and payable on August 1, 2018.

2.                 
Payment Procedures. All unpaid principal and accrued interest under this Note shall be paid in lawful money
of the United States of America (in freely transferable U.S. dollars and in immediately available funds), at such place or places
identified by the Lender by wire transfer.

3.                 
Default. It is expressly provided that upon default in the punctual payment of this Note or any part thereof,
as the same shall become due and payable, then at the option of the Lender, if the defaulted amount is not paid within ten (10)
business days of written notice of default to Maker, the entire loan amount shall be matured, and all unpaid principal and interest
shall then become due and payable. In the event default is made in the prompt payment of this Note when due or declared due, and
the same is placed in the hands of an attorney for collection, or suit is brought on same, or the same is collected through probate,
bankruptcy or other judicial proceedings, then the Maker agrees and promises to pay reasonable attorney’s fees incurred in
the successful collection by Lender of amounts due hereunder.

Upon Maker’s
insolvency or business failure, the appointment of a receiver of all or any part of Maker’s property, an assignment for the
benefit of creditors of Maker, a calling of a meeting of creditors of Maker, the commencement of any proceeding under any bankruptcy,
insolvency or debtor relief laws by or against Maker which is not dismissed within 90 days, the holder hereof may, at its option,
declare the entirety of this Note immediately due and payable, and pursue any and all other remedies available to it at law or
inequity, but failure to do so at any time shall not constitute a waiver of such holder’s right to do so at any other time.
Failure to exercise this option shall not constitute a waiver of the right to exercise it in the event of any subsequent such events.

    Note 2
    - Page 1

     

    

4.                 
Waiver of Notice. The Maker of this Note expressly waives all notices of any kind or character, demands for
payment, presentations for payment, notices of intention to accelerate the maturity, protest and notice of protest, as to this
Note and as to each, every and all installments hereof.

5.                 
Maximum Rate. Nothing in this Note shall authorize the collection of interest in excess of the maximum interest
rate allowed by law.

6.                 
Notices. All notices required or permitted under this Promissory Note shall be in writing and shall be deemed
to have been delivered upon actual delivery at the addresses provided below, or by confirmed facsimile at the facsimile number
provided below. Either party may change its address or facsimile number upon five (5) days written notice to the other party.

 

	If to
Maker:	 	Myomo, Inc.
	 	 	One Broadway, 14th Floor
	 	 	Cambridge,
MA 02124

 

If to the Lender: at the address
provided below.

 

7.                 
Prepayment. Maker, at its option, may at any time upon thirty (30) days prior written notice to Lender, prepay
all or any portion of the amount due under the Note.

8.                 
Costs of Collection. Maker agrees to pay all costs and expenses incurred by the holder hereof, including all
reasonable attorneys’ fees, in connection with the collection of this Note and the indebtedness evidenced thereby, or the
enforcement of the holder’s rights hereunder.

9.                 
WAIVER OF TRIAL BY JURY. THE MAKER HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, AND THE LENDER BY ITS ACCEPTANCE
OF THIS PROMISSORY NOTE IRREVOCABLY AND UNCONDITIONALLY WAIVES, ANY AND ALL RIGHTS TO TRIAL BY JURY, IN ANY ACTION, SUIT OR COUNTERCLAIM
ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE RELATING TO THIS PROMISSORY NOTE.

10.             
Governing Law. This Note and all loan documents were negotiated in the Commonwealth of Massachusetts, and
the validity, enforceability, construction and interpretation of this Note shall be construed, applied, enforced and governed under
and by the laws of the Commonwealth of Massachusetts.

11.             
Amendment. Neither this Note nor any provision hereof may be altered, amended, modified, changed, waived,
discharged or terminated, except by and instrument signed by the Maker and the Lender,

12.             
Accredited investor Status. The undersigned Lender represents to the Maker that he, she or it is an “accredited
investor” as defined in Rule 501 of Regulation D as promulgated under the Securities Act of 1933, as amended, and that the
Lender has such knowledge, sophistication and experience in financial and business matters that the undersigned is able to bear
the economic risk of loss of its investment in the Maker, has been granted the opportunity to make a thorough investigation of
the affairs of the Maker, and has availed itself of such opportunity either directly or through its authorized representatives.

    Note 2
    - Page 2

     

    

Executed on the date and year first
above written.

 

	 	MAKER:
	 	 
	 	MYOMO, INC.
	 	 
	 	By:	/s/ Paul R. Gudonis
	 	Name:	Paul R. Gudonis
	 	Title: 	Chief Executive Officer

 

This Note is Accepted and Agreed
by the Undersigned Lender:

SANDCASTLE LIMITED PARTNERSHIP

 

	By:	/s/ Gregory A. Daoust	 
	Name:	Gregory A. Daoust	 
	Title: 	Duly Authorized	 

 

		Address:	355 Summer Street

Manchester, MA 01944

 

 

    Note 2
    - Page 3

     

    

 

MYOMO, INC.

Amended and Restated Unsecured Term
Promissory Note

 

	$401,230.77	 	Original Issuance: January
25, 2011

First Amendment: May 9, 2011

Second Amendment: October 12, 2011

 

Effective as of
September 1, 2015, this Amended and Restated Unsecured Term Promissory Note amends and restates that certain Unsecured Term Convertible
Promissory Note, dated January 25, 2011 in the original stated principal amount of $250,000, as amended by an Amended and Restated
Unsecured Term Convertible Promissory Note dated as of May 9, 2011, and a Second Amended and Restated Unsecured Term Promissory
Note dated as of October 12, 2011 (as so amended, the “Original Note”) issued by Myomo, Inc. (“Maker”)
to Steve Kelly (the “Original Note Holder”). Pursuant to that certain Loan Transfer Agreement, dated January
2, 2015, the Original Note Holder assigned all rights, title and interest in and to the Original Note to Sandcastle Limited Partnership
(the “Lender”). As of the date of this Amended and Restated Unsecured Term Promissory Note, the outstanding balance
due on the Note, including principal and accrued, but unpaid interest, is FOUR HUNDRED ONE THOUSAND TWO HUNDRED THIRTY AND 77/100
DOLLARS ($401,230.77).

 

FOR VALUE RECEIVED,
the undersigned Maker, promises to pay to the order of the Lender (or its successors and assigns), the sum of FOUR HUNDRED ONE
THOUSAND TWO HUNDRED THIRTY AND 77/100 DOLLARS ($401,230.77) plus interest as provided for herein in legal and lawful money of
the United States of America, from the date hereof until maturity at the times and place and in the manner specified below.

1.                 
Payments. The outstanding balance shall bear interest at a rate of ten percent (10%) per annum, compounded
annually based on a 365 day year, until such time as there is no amount outstanding hereunder. Beginning on September 1, 2016,
and continuing each calendar month thereafter through August 1, 2018, Maker shall, on or before the first day of such month, make
equal monthly payments to the Lender in the amount of TWENTY THOUSAND THREE HUNDRED SIXTY SIX AND 24/100 DOLLARS ($20,366.24),
each such payment to be allocated between principal, interest and charges as determined by the Lender. All outstanding amounts
due under the Note, if any, shall be due and payable on August 1, 2018.

2.                 
Payment Procedures. All unpaid principal and accrued interest under this Note shall be paid in lawful money
of the United States of America (in freely transferable U.S. dollars and in immediately available funds), at such place or places
identified by the Lender by wire transfer.

3.                 
Default. It is expressly provided that upon default in the punctual payment of this Note or any part thereof,
as the same shall become due and payable, then at the option of the Lender, if the defaulted amount is not paid within ten (10)
business days of written notice of default to Maker, the entire loan amount shall be matured, and all unpaid principal and interest
shall then become due and payable. In the event default is made in the prompt payment of this Note when due or declared due, and
the same is placed in the hands of an attorney for collection, or suit is brought on same, or the same is collected through probate,
bankruptcy or other judicial proceedings, then the Maker agrees and promises to pay reasonable attorney’s fees incurred in
the successful collection by Lender of amounts due hereunder.

Upon Maker’s
insolvency or business failure, the appointment of a receiver of all or any part of Maker’s property, an assignment for the
benefit of creditors of Maker, a calling of a meeting of creditors of Maker, the commencement of any proceeding under any bankruptcy,
insolvency or debtor relief laws by or against Maker which is not dismissed within 90 days, the holder hereof may, at its option,
declare the entirety of this Note immediately due and payable, and pursue any and all other remedies available to it at law or
inequity, but failure to do so at any time shall not constitute a waiver of such holder’s right to do so at any other time.
Failure to exercise this option shall not constitute a waiver of the right to exercise it in the event of any subsequent such events.

    Note 3
    - Page 1

     

    

4.                 
Waiver of Notice. The Maker of this Note expressly waives all notices of any kind or character, demands for
payment, presentations for payment, notices of intention to accelerate the maturity, protest and notice of protest, as to this
Note and as to each, every and all installments hereof.

5.                 
Maximum Rate. Nothing in this Note shall authorize the collection of interest in excess of the maximum interest
rate allowed by law.

6.                 
Notices. All notices required or permitted under this Promissory Note shall be in writing and shall be deemed
to have been delivered upon actual delivery at the addresses provided below, or by confirmed facsimile at the facsimile number
provided below. Either party may change its address or facsimile number upon five (5) days written notice to the other party.

 

	If to
Maker:	 	Myomo, Inc.
	 	 	One Broadway, 14th Floor
	 	 	Cambridge,
MA 02124

 

If to the Lender: at the address
provided below.

 

7.                 
Prepayment. Maker, at its option, may at any time upon thirty (30) days prior written notice to Lender, prepay
all or any portion of the amount due under the Note.

8.                 
Costs of Collection. Maker agrees to pay all costs and expenses incurred by the holder hereof, including all
reasonable attorneys’ fees, in connection with the collection of this Note and the indebtedness evidenced thereby, or the
enforcement of the holder’s rights hereunder.

9.                 
WAIVER OF TRIAL BY JURY. THE MAKER HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, AND THE LENDER BY ITS ACCEPTANCE
OF THIS PROMISSORY NOTE IRREVOCABLY AND UNCONDITIONALLY WAIVES, ANY AND ALL RIGHTS TO TRIAL BY JURY, IN ANY ACTION, SUIT OR COUNTERCLAIM
ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE RELATING TO THIS PROMISSORY NOTE.

10.             
Governing Law. This Note and all loan documents were negotiated in the Commonwealth of Massachusetts, and
the validity, enforceability, construction and interpretation of this Note shall be construed, applied, enforced and governed under
and by the laws of the Commonwealth of Massachusetts.

11.             
Amendment. Neither this Note nor any provision hereof may be altered, amended, modified, changed, waived,
discharged or terminated, except by and instrument signed by the Maker and the Lender,

12.             
Accredited investor Status. The undersigned Lender represents to the Maker that he, she or it is an “accredited
investor” as defined in Rule 501 of Regulation D as promulgated under the Securities Act of 1933, as amended, and that the
Lender has such knowledge, sophistication and experience in financial and business matters that the undersigned is able to bear
the economic risk of loss of its investment in the Maker, has been granted the opportunity to make a thorough investigation of
the affairs of the Maker, and has availed itself of such opportunity either directly or through its authorized representatives.

    Note 3
    - Page 2

     

    

Executed on the date and year first
above written.

	 	MAKER:
	 	 
	 	MYOMO, INC.
	 	 
	 	By:	/s/ Paul R. Gudonis
	 	Name:	Paul R. Gudonis
	 	Title: 	Chief Executive Officer

 

This Note is Accepted and Agreed
by the Undersigned Lender:

SANDCASTLE LIMITED PARTNERSHIP

 

	By:	/s/ Gregory A. Daoust	 
	Name:	Gregory A. Daoust	 
	Title: 	Duly Authorized	 

 

		Address:	355 Summer Street

Manchester, MA 01944

 

    Note 3      - Page 3Exhibit 10.7

 

AMENDMENT NO, 1 TO AMENDED AND
RESTATED UNSECURED TERM

PROMISSORY NOTE

This AMENDMENT
No. 1 entered into this 29th day of June, 2016 (this “Amendment”) to the Amended and Restated Unsecured
Term Promissory Note effective September 1, 2015, issued by Myomo, Inc., a Delaware corporation (the “Maker”),
to Sandcastle Limited Partnership (the “Lender”).

WHEREAS,
Maker issued to Steve Kelly on May 25, 2011 an Unsecured Term Convertible Promissory Note in the original stated principal amount
of $75,000.00 (as amended prior to the effectiveness of the Restated Note (as defined below), the “Original Note”);

WHEREAS,
effective as of September 1, 2015, Maker and Lender amended and restated the Original Note in its entirety, in order to, among
other things, reflect the transfer by Steve Kelly of all rights, title and interest to Lender under the Original Note (the “Restated
Note”); and

WHEREAS,
Maker and Lender now wish to further amend the Restated Note on the terms and conditions set forth herein, pursuant to Section
11 of the Restated Note.

NOW, THEREFORE,
in consideration of the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the parties hereby agree as follows:

1.                 
Effective Date. This Amendment shall be effective as of the date first set forth above.

2.                 
Payments.

a.                  
Section 1 of the Restated Note is deleted in its entirety and the following is inserted in lieu thereof:

The outstanding balance shall bear
interest at a rate of ten percent (10%) per annum, compounded annually based on a 365 day year, until such time as there is no
amount outstanding hereunder. Subject to Section 2 hereof, all outstanding amounts then due under this Note shall be due and payable
within thirty (30) days following the completion of a financing by Maker with the principal purpose of raising capital, pursuant
to which it sells its common stock, preferred stock or other equity securities, with aggregate gross proceeds to Maker of not
less than $5.0 million, excluding any and all indebtedness that is converted into securities issued by Maker in such financing
(the “Qualified Financing”), provided, that, if no such Qualified Financing is completed on or before June
8, 2017, all outstanding amounts under this Note shall be due and payable on June 8, 2017.

    Note 1 - Page 1

     

    

3.                 
Repayment in Stock Upon Qualified Financing. A new Section 2 is hereby inserted immediately after Section
1 of the Restated Note, as amended hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately
to reflect such insertion:

Notwithstanding anything to the contrary,
in the event Maker completes a Qualified Financing, Maker and Lender shall agree to amend this Note, effective upon the closing
of such Qualified Financing, to provide that Maker may elect, in its sole discretion, to repay up to fifty percent (50%) (rounded
down to the nearest whole cent) of the aggregate outstanding amount (the principal amount and all accrued but unpaid interest thereon)
under this Note as of the date of the Qualified Financing (such amount, the “Stock Repayment Amount”) by issuing,
no later than five (5) business days following the date of the closing of the Qualified Financing, shares of Maker’s common
stock, preferred stock or other equity securities (as applicable) issued in such Qualified Financing equal to the Stock Repayment
Amount divided by that number equal to 80% of the price per share of Maker’s equity securities paid by purchasers of such
securities in the Qualified Financing. Lender shall execute such documents and instruments as necessary to participate in the Qualified
Financing, and shall be bound by such transactions and instruments to the same degree as, and have the rights of, the other investors
in the Qualified Financing.

4.                 
Subordination. A new Section 3 is hereby inserted immediately after Section 2 of the Restated Note, as amended
hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately to reflect such insertion:

This Note, the amounts outstanding
hereunder and Maker’s obligations to Lender hereunder shall be subordinated to certain other indebtedness of Maker issued
pursuant to (i) the Accelerator Funding Agreement, dated June 7, 2011, between Maker and the Massachusetts Life Sciences Center,
(ii) the notes issued by Maker pursuant to the Subscription Agreement, dated as of December 23, 2015, December 29, 2015, December
30, 2015, December 31, 2015, January 21, 2016, January 28, 2016 and February 1, 2016, among Maker and the other lenders parties
thereto, and (iii) the notes, in the form attached hereto as Exhibit I, executed and delivered by Maker in a convertible note financing
to be completed on or about the date hereof, in each case as amended and/or restated from time to time.

5.                 
Amendment Provision. This Amendment is entered into by Maker and Lender in a manner consistent with the provisions
of Section 11 of the Restated Note. Except as expressly set forth in this Amendment, the Restated Note is not amended or modified,
Lender has not waived the terms of any of the Restated Note, and the terms and conditions of the Restated Note are ratified and
confirmed and such terms shall remain in full force and effect. In connection with this Amendment and the other amendments to be
entered into by Maker and Lender on or about the date hereof, Maker shall reimburse the reasonable and documented out-of-pocket
fees and expenses of Lender (including those of its legal counsel), in an amount not to exceed $7,500 in the aggregate for all
notes amended on or about the date hereof.

6.                 
General. Capitalized terms used herein and not defined shall have the meanings ascribed to them in the Restated
Note. This Amendment may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together
shall constitute one and the same instrument. The terms of this Amendment shall be construed in accordance with the laws of the
Commonwealth of Massachusetts, without regard to choice of law provisions.

Legal Disclaimer: Myomo, Inc. may,
in the future, undertake a public offering pursuant to Regulation A under the Act No money or other consideration is being solicited
at this time with respect to such an offering, and if sent in response to these materials for such an offering, it will not be
accepted. No offer to buy securities can be accepted and no part of the purchase price can be received for an offering under Regulation
A until an offering statement is qualified by the U. S. Securities and Exchange Commission, and any such offer may be withdrawn
or revoked, without obligation or commitment of any kind, at any time before notice of its acceptance given after the qualification
date, An indication of interest made by a prospective investor in a Regulation A offering is non-binding and involves no obligation
or commitment of any kind.

    Note 1 - Page 2

     

    

IN WITNESS WHEREOF, the parties hereto have executed
this Amendment on the date first written above.

 

	LENDER:	 	MAKER:
	SANDCASTLE LIMITED PARTNERSHIP	 	MYOMO, INC.
	By:
	/s/ Christopher
Archambault	 	By:	 /s/ Paul R. Gudonis
	Name:	Christopher Archambault	 	Paul R. Gudonis 
	Title: 	Duly Authorized	 	Chief Executive Officer

 

 

    Note 1 - Page 3

     

    

EXHIBIT I 

THIS SUBORDINATED CONVERTIBLE PROMISSORY
NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO SALE OR DISPOSITION MAY BE EFFECTED EXCEPT IN COMPLIANCE
WITH RULE 144 UNDER SAID ACT OR AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL FOR THE HOLDER SATISFACTORY
TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
COMMISSION.

SUBORDINATED CONVERTIBLE PROMISSORY
NOTE

	$_______________	 	_______________ _____,2016
	 	 	Cambridge, MA

For value received Myomo,
Inc., a Delaware corporation (the “Company”), promises to pay to _______________ or its assigns (“Holder”)
the principal sum of $ __________together with accrued and unpaid interest thereon, each due and payable on the date and in the
manner set forth below.

This subordinated convertible promissory
note (the “Note”) is issued as part of a series of similar subordinated convertible promissory notes (collectively,
the “Notes”) pursuant to the terms of that certain Subscription Agreement (as may be amended, restated and/or
otherwise modified

from time to time, the “Agreement”)
dated as of _______________ ___, 2016 to the persons and entities listed on the Schedule of Investors attached to the Agreement
(collectively, the “Holders”). Capitalized terms used herein without definition shall have the meanings given
to such terms in the Agreement.

1.                 
Repayment. All
payments of interest and principal shall be in lawful money of the United States of America and shall be made pro rata among all
Holders. All payments shall be applied first to accrued interest, and thereafter to principal. The outstanding principal amount
of the Loan shall be due and payable on December 31, 2018 (the “Maturity Date”), unless earlier converted.

2.                 
Interest Rate. The Company promises to pay the outstanding
principal amount, together with interest thereon accruing on and from the date hereof, at an annual rate equal to 8%, or such lesser
rate permissible by law. Interest on the outstanding principal balance of the Notes shall be computed on the basis of the actual
number of days elapsed and a 365-day year, compounded annually. The interest shall accrue until the Notes are converted or the
Maturity Date.

3.                 
Conversion; Repayment Premium Upon Sale of the Company.

(a)              
In the event that the Company issues and sells shares of its Equity Securities (as defined below) to investors
(the “Investors”) on or before the date of the repayment in full of this Note in an equity financing resulting
in gross proceeds to the Company of at least $5,000,000 (excluding the conversion of the Notes and any other indebtedness) (a “Qualified
Financing”), then the outstanding principal balance of this Note and any accrued but unpaid interest thereon shall automatically
convert in whole without any further action by the Holder into such Equity Securities at a conversion price (the “Conversion
Price”) equal to the lower of: (i) the price per share equal to $35,000,000 divided by the aggregate number of shares
of capital stock outstanding on a fully diluted basis immediately prior to the initial closing of the Qualified Financing and (ii)
eighty percent (80%) of the per share price paid by the Investors in the Qualified Financing.

    Note 1 - Ex-I - Page 1

     

    

EXHIBIT I 

(b)              
If, after aggregation, the conversion of this Note would result in the issuance of a fractional share, the Company
shall, in lieu of issuance of any fractional share, pay the Holder otherwise entitled to such fraction a sum in cash equal to the
product resulting from multiplying the then current fair market value of one share of the class and series of capital stock into
which this Note has converted by such fraction.

(c)               
Notwithstanding any provision of this Note to the contrary, in the event that the Company consummates a Sale
of the Company (as defined below) prior to the conversion or repayment in full of this Note, the Holder will receive a cash payment
equal the aggregate amount of principal and accrued, but unpaid interest then outstanding under the Note plus an additional amount
equal to twenty five percent (25%) of the original principal amount of this Note. Such amount shall be paid to the Holder in lieu
of the principal and interest that would otherwise be payable on the Maturity Date.

(d)              
For purposes of this Note:

(i)                
“Sale of the Company” shall mean (i) any consolidation or merger of the Company with or into
any other corporation or other entity or person, or any other corporate reorganization, other than any such consolidation, merger
or reorganization in which the stockholders of the Company immediately prior to such consolidation, merger or reorganization, continue
to hold at least a majority of the voting power of the surviving entity in substantially the same proportions (or, if the surviving
entity is a wholly owned subsidiary, its parent) immediately after such consolidation, merger or reorganization; (ii) any transaction
or series of related transactions to which the Company is a party in which more than 50% of the voting power in the Company”
s capital stock is transferred; provided, however, that a Sale of the Company shall not include any transaction or
series of transactions principally for bona fide equity financing purposes in which cash is received by the Company or any successor
or indebtedness of the Company is cancelled or converted or a combination thereof; or (iii) a sale, lease, exclusive license or
other disposition of all or substantially all of the assets of the Company.

(ii)              
“Equity Securities” shall mean the Company’s Common Stock or Preferred Stock or any
securities conferring the right to purchase the Company’s Common Stock or Preferred Stock or securities convertible into,
or exchangeable for (with or without additional consideration), the Company’s Common Stock or Preferred Stock, except that
such defined term shall not include any security (x) granted, issued and/or sold by the Company to any employee, director or consultant
in such capacity or (y) issued upon the conversion or exercise of any option or warrant outstanding as of the date of this Note.

    Note 1 - Ex-I - Page 2

     

    

EXHIBIT I 

(e)               
Except for the rights to obtain certificates representing Equity Securities upon conversion of this Note, all
rights with respect to this Note shall terminate upon the effective conversion or repayment of the entire outstanding balance of
this Note and any accrued but unpaid interest thereon, whether or not this Note has been surrendered to the Company for cancellation.

4.                 
Maturity. Unless this Note has been previously converted
or satisfied in accordance with the terms of Section 3 above, the entire outstanding principal balance and all unpaid accrued interest
shall become fully due and payable on the Maturity Date.

5.                 
Expenses. In the event of any default hereunder, the Company
shall pay all reasonable attorneys’ fees and court costs incurred by Holder in enforcing and collecting this Note.

6.                 
Prepayment. The Company may prepay this Note in whole or
in part at anytime; provided, that any partial payment of principal shall be accompanied by payment of accrued interest to the
date of prepayment. Any payment made to the holders of the Notes which is not a full payment of all principal and interest on all
of the Notes shall be made pro rata to the holders of the Notes based on the respective principal amounts of the Notes,

7.                 
Default. If there shall be any Event of Default hereunder,
at the option and upon the declaration of the Requisite Holders and upon written notice to the Company (which election and
notice shall not be required in the case of an Event of Default under Section 7(c) or 7(d)), this Note shall accelerate and all
principal and unpaid accrued interest shall become due and payable. The occurrence of any one or more of the following shall constitute
an “Event of Default”:

(a)              
The Company fails to pay timely any of the principal amount, accrued interest of other amounts due under this
Note on the applicable due date and such failure continues for five (5) days;

(b)              
The Company shall default in its performance of any covenant under the Agreement or any Note and such default
persists beyond any applicable cure period;

(c)               
The Company files any petition or action for relief under any bankruptcy, reorganization, insolvency or moratorium
law or any other law for the relief of, or relating to, debtors, now or hereafter in effect, or makes any general assignment for
the benefit of creditors or takes any corporate action for the purpose of effecting any of the foregoing; or

(d)              
An involuntary petition is filed against the Company in any court of competent jurisdiction under any bankruptcy
statute now or hereafter in effect and such proceeding continues undismissed or unstayed and in effect for any period of 90 consecutive
days, or a custodian, receiver, trustee, assignee for the benefit of creditors (or other similar official) is appointed to take
possession, custody or control of any property of the Company.

    Note 1 - Ex-I - Page 3

     

    

EXHIBIT I 

8.                 
Future Notes. If, while this Note is outstanding, the Company
issues other indebtedness of the Company convertible into Equity Securities of the Company with material terms that are more favorable,
from the perspective of the Holder (“Other Debt”), than the terms of this Note (other than with respect to principal
amount, interest and maturity date), then the Company will provide the Holder with written notice thereof, together with a copy
of all documentation relating to such Other Debt and, upon request of the Holder, any additional information related to such Other
Debt as may be reasonably requested by the Holder. The Company will provide such notice to Holder promptly (and in any event within
30 days) following the issuance of such Other Debt. In the event the Requisite Holders determine that the terms of the Other Debt
are preferable to the terms of this Note, the Requisite Holders may, but are not obligated to, notify the Company in writing within
5 days following receipt of such notice from the Company that they are electing, on behalf of themselves and the other Holders
of the Notes, to exchange the Notes for the Other Debt. Promptly after receipt of such written notice from the Requisite Holders,
but in any event within 30 days, the Company will amend and! restate this Note to be substantially identical to promissory note
evidencing the Other Debt., excluding principal amount, interest and maturity date. If the Requisite Holders do not notify the;
Company of such an election described in this Section 8 within the 5 days, the Holders shall be deemed to have waived their right
to exchange their Notes for the Other Debt in such instance.

9.                 
Waiver. The Company hereby waives demand, notice, presentment,
protest and notice of dishonor.

10.             
Governing Law. This Note shall be governed by and construed
under the laws of the State of Delaware, as applied to agreements among Delaware residents, made and to be performed entirely within
the State of Delaware, without giving effect to conflicts of laws principles.

11.             
Parity with Other Notes and Other Indebtedness; Subordination.

(a)              
The Company’s repayment obligation to the Holder under this Note shall! be on parity with the Company’s
obligation to repay all Notes issued pursuant to the Agreement and the convertible promissory notes issued by the Company pursuant
to the Subscription Agreements, dated as of December 23, 2015, December 29, 2015, December 30, 2015, December 31, 2015, January
21, 2016, January 28, 2016 and February 1, 2016, among the Company and the lenders parties thereto, as may be amended, restated
and/or otherwise modified from time to time. In the event that the Company is obligated to repay the Notes and does not have sufficient
funds to repay all the Notes in full, payment shall be made to the Holders of the Notes on a pro rata basis. The preceding
sentence shall not, however, relieve the Company of its, obligations to the Holder hereunder.

(b)              
The Company’s repayment obligation to the Holder under this Note shall be subordinated to certain other
indebtedness of the Company issued to pursuant to the Accelerator Funding Agreement, dated June 7, 2011, between the Company and
the Massachusetts Life Sciences Center, as may be amended from time to time, and any other senior indebtedness of the Company hereafter
issued, including, but not limited to commercial bank, lenders and venture debt lenders (collectively, “Senior Lenders”).
Notwithstanding anything herein to the contrary. Holder hereby agrees that the Company’s failure to pay any amounts or otherwise
comply with any terms or provisions of this Note as a result of its obligations to the Senior Lenders pursuant to any subordination
agreement to which the Company and any Senior Lender is a party shall not constitute a default or an Event of Default under this
Note.

    Note 1 - Ex-I - Page 4

     

    

EXHIBIT I 

12.             
Modification; Waiver. Any term of this Note may be amended
or waived with the written consent of the Company and the Requisite Holders, which amendment or waiver shall apply to all the Notes
and shall be binding on all the Holders thereof.

13.             
Assignment. This Note may be transferred only upon its surrender
to the Company for registration of transfer, duly endorsed, or accompanied by a duly executed written instrument of transfer in
form satisfactory to the Company. Thereupon, this Note shall be reissued to, and registered in the name of, the transferee, or
a new Note for like principal amount and interest shall be issued to, and registered in the name of, the transferee. Notwithstanding
anything to the contrary, the Company may elect not to permit a transfer of the Note if it has not obtained satisfactory assurance
that such transfer: (a) is exempt from the registration requirements of, or covered by an effective registration statement under,
the Act, and the rules and regulations thereunder and (b) is in compliance with all applicable state securities laws, including
without limitation receipt of an opinion of counsel, which opinion shall be satisfactory to the Company. Interest and principal
shall be paid solely to the registered holder of this Note. Such payment shall constitute full discharge of the Company’s
obligation to pay such interest and principal.

14.             
Notices. Unless otherwise provided, any notice required
or permitted under tins Note shall be given in the same manner as provided in the Agreement.

Legal Disclaimer: The Company is
currently undertaking a private placement offering pursuant to Section 4(a)(2) of the Act, and/or Rule 506 of Regulation D promulgated
thereunder, The Company may, in the future, undertake a public offering pursuant to Regulation A under the Act. No money or other
consideration is being solicited at this time with respect to such an offering, and if sent in response to these materials for
such an offering, it will not be accepted. No offer to buy securities can be accepted and no part of the purchase price can be
received for an offering under Regulation A until an offering statement is qualified by the U. S. Securities and Exchange Commission,
and any such offer may be withdrawn or revoked, without obligation or commitment of any kind at any time before notice of its acceptance
given after the qualification dale. An indication of interest made by a prospective investor in a Regulation A offering is non-binding
and involves no obligation or commitment of any kind.

[signature page follows]

    Note 1 - Ex-I - Page 5

     

    

EXHIBIT I 

 

	 	Myomo, Inc.
	 	 
	 	By: 	
	 	Name:

        Title:
	
	 	 	 
	Holder:	 	 	 
	Principal Amount of Note:	 	 	 
	Date of Note	 	 	 

 

    [Signature
page to Subordinated Convertible Promissory Note of Myomo, Inc.]

     

    

 

AMENDMENT NO, 1 TO AMENDED AND
RESTATED UNSECURED TERM

PROMISSORY NOTE

This AMENDMENT
No. 1 entered into this 29th day of June, 2016 (this “Amendment”) to the Amended and Restated Unsecured
Term Promissory Note effective September 1, 2015, issued by Myomo, Inc., a Delaware corporation (the “Maker”),
to Sandcastle Limited Partnership (the “Lender”).

WHEREAS,
Maker issued to Steve Kelly on October 18, 2010 an Unsecured Term Convertible Promissory Note in the original stated principal
amount of $250,000.00 (as amended prior to the effectiveness of the Restated Note (as defined below), the “Original Note”);

WHEREAS,
effective as of September 1, 2015, Maker and Lender amended and restated the Original Note in its entirety, in order to, among
other things, reflect the transfer by Steve Kelly of all rights, title and interest to Lender under the Original Note (the “Restated
Note”); and

WHEREAS,
Maker and Lender now wish to further amend the Restated Note on the terms and conditions set forth herein, pursuant to Section
11 of the Restated Note.

NOW, THEREFORE,
in consideration of the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the parties hereby agree as follows:

1.                 
Effective Date. This Amendment shall be effective as of the date first set forth above.

2.                 
Payments.

a.                  
Section 1 of the Restated Note is deleted in its entirety and the following is inserted in lieu thereof:

The outstanding balance shall bear
interest at a rate of ten percent (10%) per annum, compounded annually based on a 365 day year, until such time as there is no
amount outstanding hereunder. Subject to Section 2 hereof, all outstanding amounts then due under this Note shall be due and payable
within thirty (30) days following the completion of a financing by Maker with the principal purpose of raising capital, pursuant
to which it sells its common stock, preferred stock or other equity securities, with aggregate gross proceeds to Maker of not less
than $5.0 million, excluding any and all indebtedness that is converted into securities issued by Maker in such financing (the
“Qualified Financing”), provided, that, if no such Qualified Financing is completed on or before June 8, 2017,
all outstanding amounts under this Note shall be due and payable on June 8, 2017.

    Note 2  - Page 1

     

    

3.                 
Repayment in Stock Upon Qualified Financing. A new Section 2 is hereby inserted immediately after Section
1 of the Restated Note, as amended hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately
to reflect such insertion:

Notwithstanding anything to the contrary,
in the event Maker completes a Qualified Financing, Maker and Lender shall agree to amend this Note, effective upon the closing
of such Qualified Financing, to provide that Maker may elect, in its sole discretion, to repay up to fifty percent (50%) (rounded
down to the nearest whole cent) of the aggregate outstanding amount (the principal amount and all accrued but unpaid interest thereon)
under this Note as of the date of the Qualified Financing (such amount, the “Stock Repayment Amount”) by issuing,
no later than five (5) business days following the date of the closing of the Qualified Financing, shares of Maker’s common
stock, preferred stock or other equity securities (as applicable) issued in such Qualified Financing equal to the Stock Repayment
Amount divided by that number equal to 80% of the price per share of Maker’s equity securities paid by purchasers of such
securities in the Qualified Financing. Lender shall execute such documents and instruments as necessary to participate in the Qualified
Financing, and shall be bound by such transactions and instruments to the same degree as, and have the rights of, the other investors
in the Qualified Financing.

4.                 
Subordination. A new Section 3 is hereby inserted immediately after Section 2 of the Restated Note, as amended
hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately to reflect such insertion:

This Note, the amounts outstanding
hereunder and Maker’s obligations to Lender hereunder shall be subordinated to certain other indebtedness of Maker issued
pursuant to (i) the Accelerator Funding Agreement, dated June 7, 2011, between Maker and the Massachusetts Life Sciences Center,
(ii) the notes issued by Maker pursuant to the Subscription Agreement, dated as of December 23, 2015, December 29, 2015, December
30, 2015, December 31, 2015, January 21, 2016, January 28, 2016 and February 1, 2016, among Maker and the other lenders parties
thereto, and (iii) the notes, in the form attached hereto as Exhibit I, executed and delivered by Maker in a convertible note financing
to be completed on or about the date hereof, in each case as amended and/or restated from time to time.

5.                 
Amendment Provision. This Amendment is entered into by Maker and Lender in a manner consistent with the provisions
of Section 11 of the Restated Note. Except as expressly set forth in this Amendment, the Restated Note is not amended or modified,
Lender has not waived the terms of any of the Restated Note, and the terms and conditions of the Restated Note are ratified and
confirmed and such terms shall remain in full force and effect. In connection with this Amendment and the other amendments to be
entered into by Maker and Lender on or about the date hereof, Maker shall reimburse the reasonable and documented out-of-pocket
fees and expenses of Lender (including those of its legal counsel), in an amount not to exceed $7,500 in the aggregate for all
notes amended on or about the date hereof.

    Note 2  - Page 2

     

    

6.                 
General. Capitalized terms used herein and not defined shall have the meanings ascribed to them in the Restated
Note. This Amendment may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together
shall constitute one and the same instrument. The terms of this Amendment shall be construed in accordance with the laws of the
Commonwealth of Massachusetts, without regard to choice of law provisions.

Legal Disclaimer: Myomo, Inc. may,
in the future, undertake a public offering pursuant to Regulation A under the Act No money or other consideration is being solicited
at this time with respect to such an offering, and if sent in response to these materials for such an offering, it will not be
accepted. No offer to buy securities can be accepted and no part of the purchase price can be received for an offering under Regulation
A until an offering statement is qualified by the U. S. Securities and Exchange Commission, and any such offer may be withdrawn
or revoked, without obligation or commitment of any kind, at any time before notice of its acceptance given after the qualification
date, An indication of interest made by a prospective investor in a Regulation A offering is non-binding and involves no obligation
or commitment of any kind.

    Note 2  - Page 3

     

    

IN WITNESS WHEREOF, the parties
hereto have executed this Amendment on the date first written above.

	LENDER:	 	MAKER:
	SANDCASTLE LIMITED PARTNERSHIP	 	MYOMO, INC.
	By:
	/s/ Christopher
Archambault	 	By:	 /s/ Paul R. Gudonis
	Name:	Christopher Archambault	 	Paul R. Gudonis 
	Title: 	Duly Authorized	 	Chief Executive Officer

 

    Note 2  - Page 4

     

    

EXHIBIT I 

THIS SUBORDINATED CONVERTIBLE PROMISSORY
NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO SALE OR DISPOSITION MAY BE EFFECTED EXCEPT IN COMPLIANCE
WITH RULE 144 UNDER SAID ACT OR AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL FOR THE HOLDER SATISFACTORY
TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
COMMISSION.

SUBORDINATED CONVERTIBLE PROMISSORY
NOTE

 

	$_______________	 	_______________ _____,2016
	 	 	Cambridge, MA

For value received Myomo,
Inc., a Delaware corporation (the “Company”), promises to pay to _______________ or its assigns (“Holder”)
the principal sum of $ __________together with accrued and unpaid interest thereon, each due and payable on the date and in the
manner set forth below.

This subordinated convertible promissory
note (the “Note”) is issued as part of a series of similar subordinated convertible promissory notes (collectively,
the “Notes”) pursuant to the terms of that certain Subscription Agreement (as may be amended, restated and/or
otherwise modified

from time to time, the “Agreement”)
dated as of _______________ ___, 2016 to the persons and entities listed on the Schedule of Investors attached to the Agreement
(collectively, the “Holders”). Capitalized terms used herein without definition shall have the meanings given
to such terms in the Agreement.

1.                 
Repayment. All
payments of interest and principal shall be in lawful money of the United States of America and shall be made pro rata among all
Holders. All payments shall be applied first to accrued interest, and thereafter to principal. The outstanding principal amount
of the Loan shall be due and payable on December 31, 2018 (the “Maturity Date”), unless earlier converted.

2.                 
Interest Rate. The Company promises to pay the outstanding
principal amount, together with interest thereon accruing on and from the date hereof, at an annual rate equal to 8%, or such lesser
rate permissible by law. Interest on the outstanding principal balance of the Notes shall be computed on the basis of the actual
number of days elapsed and a 365-day year, compounded annually. The interest shall accrue until the Notes are converted or the
Maturity Date.

3.                 
Conversion; Repayment Premium Upon Sale of the Company.

(a)              
In the event that the Company issues and sells shares of its Equity Securities (as defined below) to investors
(the “Investors”) on or before the date of the repayment in full of this Note in an equity financing resulting
in gross proceeds to the Company of at least $5,000,000 (excluding the conversion of the Notes and any other indebtedness) (a “Qualified
Financing”), then the outstanding principal balance of this Note and any accrued but unpaid interest thereon shall automatically
convert in whole without any further action by the Holder into such Equity Securities at a conversion price (the “Conversion
Price”) equal to the lower of: (i) the price per share equal to $35,000,000 divided by the aggregate number of shares
of capital stock outstanding on a fully diluted basis immediately prior to the initial closing of the Qualified Financing and (ii)
eighty percent (80%) of the per share price paid by the Investors in the Qualified Financing.

    Note  2 - Ex-I - Page 1

     

    

EXHIBIT I 

(b)              
If, after aggregation, the conversion of this Note would result in the issuance of a fractional share, the Company
shall, in lieu of issuance of any fractional share, pay the Holder otherwise entitled to such fraction a sum in cash equal to the
product resulting from multiplying the then current fair market value of one share of the class and series of capital stock into
which this Note has converted by such fraction.

(c)               
Notwithstanding any provision of this Note to the contrary, in the event that the Company consummates a Sale
of the Company (as defined below) prior to the conversion or repayment in full of this Note, the Holder will receive a cash payment
equal the aggregate amount of principal and accrued, but unpaid interest then outstanding under the Note plus an additional amount
equal to twenty five percent (25%) of the original principal amount of this Note. Such amount shall be paid to the Holder in lieu
of the principal and interest that would otherwise be payable on the Maturity Date.

(d)              
For purposes of this Note:

(i)                
“Sale of the Company” shall mean (i) any consolidation or merger of the Company with or into
any other corporation or other entity or person, or any other corporate reorganization, other than any such consolidation, merger
or reorganization in which the stockholders of the Company immediately prior to such consolidation, merger or reorganization, continue
to hold at least a majority of the voting power of the surviving entity in substantially the same proportions (or, if the surviving
entity is a wholly owned subsidiary, its parent) immediately after such consolidation, merger or reorganization; (ii) any transaction
or series of related transactions to which the Company is a party in which more than 50% of the voting power in the Company”
s capital stock is transferred; provided, however, that a Sale of the Company shall not include any transaction or
series of transactions principally for bona fide equity financing purposes in which cash is received by the Company or any successor
or indebtedness of the Company is cancelled or converted or a combination thereof; or (iii) a sale, lease, exclusive license or
other disposition of all or substantially all of the assets of the Company.

(ii)              
“Equity Securities” shall mean the Company’s Common Stock or Preferred Stock or any
securities conferring the right to purchase the Company’s Common Stock or Preferred Stock or securities convertible into,
or exchangeable for (with or without additional consideration), the Company’s Common Stock or Preferred Stock, except that
such defined term shall not include any security (x) granted, issued and/or sold by the Company to any employee, director or consultant
in such capacity or (y) issued upon the conversion or exercise of any option or warrant outstanding as of the date of this Note.

    Note  2 - Ex-I - Page 2

     

    

EXHIBIT I 

(e)               
Except for the rights to obtain certificates representing Equity Securities upon conversion of this Note, all
rights with respect to this Note shall terminate upon the effective conversion or repayment of the entire outstanding balance of
this Note and any accrued but unpaid interest thereon, whether or not this Note has been surrendered to the Company for cancellation.

4.                 
Maturity. Unless this Note has been previously converted
or satisfied in accordance with the terms of Section 3 above, the entire outstanding principal balance and all unpaid accrued interest
shall become fully due and payable on the Maturity Date.

5.                 
Expenses. In the event of any default hereunder, the Company
shall pay all reasonable attorneys’ fees and court costs incurred by Holder in enforcing and collecting this Note.

6.                 
Prepayment. The Company may prepay this Note in whole or
in part at anytime; provided, that any partial payment of principal shall be accompanied by payment of accrued interest to the
date of prepayment. Any payment made to the holders of the Notes which is not a full payment of all principal and interest on all
of the Notes shall be made pro rata to the holders of the Notes based on the respective principal amounts of the Notes,

7.                 
Default. If there shall be any Event of Default hereunder,
at the option and upon the declaration of the Requisite Holders and upon written notice to the Company (which election and
notice shall not be required in the case of an Event of Default under Section 7(c) or 7(d)), this Note shall accelerate and all
principal and unpaid accrued interest shall become due and payable. The occurrence of any one or more of the following shall constitute
an “Event of Default”:

(a)              
The Company fails to pay timely any of the principal amount, accrued interest of other amounts due under this
Note on the applicable due date and such failure continues for five (5) days;

(b)              
The Company shall default in its performance of any covenant under the Agreement or any Note and such default
persists beyond any applicable cure period;

(c)               
The Company files any petition or action for relief under any bankruptcy, reorganization, insolvency or moratorium
law or any other law for the relief of, or relating to, debtors, now or hereafter in effect, or makes any general assignment for
the benefit of creditors or takes any corporate action for the purpose of effecting any of the foregoing; or

(d)              
An involuntary petition is filed against the Company in any court of competent jurisdiction under any bankruptcy
statute now or hereafter in effect and such proceeding continues undismissed or unstayed and in effect for any period of 90 consecutive
days, or a custodian, receiver, trustee, assignee for the benefit of creditors (or other similar official) is appointed to take
possession, custody or control of any property of the Company.

    Note  2 - Ex-I - Page 3

     

    

EXHIBIT I 

8.                 
Future Notes. If, while this Note is outstanding, the Company
issues other indebtedness of the Company convertible into Equity Securities of the Company with material terms that are more favorable,
from the perspective of the Holder (“Other Debt”), than the terms of this Note (other than with respect to principal
amount, interest and maturity date), then the Company will provide the Holder with written notice thereof, together with a copy
of all documentation relating to such Other Debt and, upon request of the Holder, any additional information related to such Other
Debt as may be reasonably requested by the Holder. The Company will provide such notice to Holder promptly (and in any event within
30 days) following the issuance of such Other Debt. In the event the Requisite Holders determine that the terms of the Other Debt
are preferable to the terms of this Note, the Requisite Holders may, but are not obligated to, notify the Company in writing within
5 days following receipt of such notice from the Company that they are electing, on behalf of themselves and the other Holders
of the Notes, to exchange the Notes for the Other Debt. Promptly after receipt of such written notice from the Requisite Holders,
but in any event within 30 days, the Company will amend and! restate this Note to be substantially identical to promissory note
evidencing the Other Debt., excluding principal amount, interest and maturity date. If the Requisite Holders do not notify the;
Company of such an election described in this Section 8 within the 5 days, the Holders shall be deemed to have waived their right
to exchange their Notes for the Other Debt in such instance.

9.                 
Waiver. The Company hereby waives demand, notice, presentment,
protest and notice of dishonor.

10.             
Governing Law. This Note shall be governed by and construed
under the laws of the State of Delaware, as applied to agreements among Delaware residents, made and to be performed entirely within
the State of Delaware, without giving effect to conflicts of laws principles.

11.             
Parity with Other Notes and Other Indebtedness; Subordination.

(a)              
The Company’s repayment obligation to the Holder under this Note shall! be on parity with the Company’s
obligation to repay all Notes issued pursuant to the Agreement and the convertible promissory notes issued by the Company pursuant
to the Subscription Agreements, dated as of December 23, 2015, December 29, 2015, December 30, 2015, December 31, 2015, January
21, 2016, January 28, 2016 and February 1, 2016, among the Company and the lenders parties thereto, as may be amended, restated
and/or otherwise modified from time to time. In the event that the Company is obligated to repay the Notes and does not have sufficient
funds to repay all the Notes in full, payment shall be made to the Holders of the Notes on a pro rata basis. The preceding
sentence shall not, however, relieve the Company of its, obligations to the Holder hereunder.

(b)              
The Company’s repayment obligation to the Holder under this Note shall be subordinated to certain other
indebtedness of the Company issued to pursuant to the Accelerator Funding Agreement, dated June 7, 2011, between the Company and
the Massachusetts Life Sciences Center, as may be amended from time to time, and any other senior indebtedness of the Company hereafter
issued, including, but not limited to commercial bank, lenders and venture debt lenders (collectively, “Senior Lenders”).
Notwithstanding anything herein to the contrary. Holder hereby agrees that the Company’s failure to pay any amounts or otherwise
comply with any terms or provisions of this Note as a result of its obligations to the Senior Lenders pursuant to any subordination
agreement to which the Company and any Senior Lender is a party shall not constitute a default or an Event of Default under this
Note.

    Note  2 - Ex-I - Page 4

     

    

EXHIBIT I 

12.             
Modification; Waiver. Any term of this Note may be amended
or waived with the written consent of the Company and the Requisite Holders, which amendment or waiver shall apply to all the Notes
and shall be binding on all the Holders thereof.

13.             
Assignment. This Note may be transferred only upon its surrender
to the Company for registration of transfer, duly endorsed, or accompanied by a duly executed written instrument of transfer in
form satisfactory to the Company. Thereupon, this Note shall be reissued to, and registered in the name of, the transferee, or
a new Note for like principal amount and interest shall be issued to, and registered in the name of, the transferee. Notwithstanding
anything to the contrary, the Company may elect not to permit a transfer of the Note if it has not obtained satisfactory assurance
that such transfer: (a) is exempt from the registration requirements of, or covered by an effective registration statement under,
the Act, and the rules and regulations thereunder and (b) is in compliance with all applicable state securities laws, including
without limitation receipt of an opinion of counsel, which opinion shall be satisfactory to the Company. Interest and principal
shall be paid solely to the registered holder of this Note. Such payment shall constitute full discharge of the Company’s
obligation to pay such interest and principal.

14.             
Notices. Unless otherwise provided, any notice required
or permitted under tins Note shall be given in the same manner as provided in the Agreement.

Legal Disclaimer: The Company is
currently undertaking a private placement offering pursuant to Section 4(a)(2) of the Act, and/or Rule 506 of Regulation D promulgated
thereunder, The Company may, in the future, undertake a public offering pursuant to Regulation A under the Act. No money or other
consideration is being solicited at this time with respect to such an offering, and if sent in response to these materials for
such an offering, it will not be accepted. No offer to buy securities can be accepted and no part of the purchase price can be
received for an offering under Regulation A until an offering statement is qualified by the U. S. Securities and Exchange Commission,
and any such offer may be withdrawn or revoked, without obligation or commitment of any kind at any time before notice of its acceptance
given after the qualification dale. An indication of interest made by a prospective investor in a Regulation A offering is non-binding
and involves no obligation or commitment of any kind.

[signature page follows]

    Note  2 - Ex-I - Page 5

     

    

EXHIBIT I 

 

	 	Myomo, Inc.
	 	 
	 	By: 	
	 	Name:

        Title:
	
	 	 	 
	Holder:	 	 	 
	Principal Amount of Note:	 	 	 
	Date of Note	 	 	 

 

    [Signature
page to Subordinated Convertible Promissory Note of Myomo, Inc.]

     

    

AMENDMENT NO, 1 TO AMENDED AND
RESTATED UNSECURED TERM

PROMISSORY NOTE

This AMENDMENT
No. 1 entered into this 29th day of June, 2016 (this “Amendment”) to the Amended and Restated Unsecured
Term Promissory Note effective September 1, 2015, issued by Myomo, Inc., a Delaware corporation (the “Maker”),
to Sandcastle Limited Partnership (the “Lender”).

WHEREAS,
Maker issued to Steve Kelly on January 25, 2011 an Unsecured Term Convertible Promissory Note in the original stated principal
amount of $250,000.00 (as amended prior to the effectiveness of the Restated Note (as defined below), the “Original Note”);

WHEREAS,
effective as of September 1, 2015, Maker and Lender amended and restated the Original Note in its entirety, in order to, among
other things, reflect the transfer by Steve Kelly of all rights, title and interest to Lender under the Original Note (the “Restated
Note”); and

WHEREAS,
Maker and Lender now wish to further amend the Restated Note on the terms and conditions set forth herein, pursuant to Section
11 of the Restated Note.

NOW, THEREFORE,
in consideration of the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the parties hereby agree as follows:

1.                 
Effective Date. This Amendment shall be effective as of the date first set forth above.

2.                 
Payments.

a.                  
Section 1 of the Restated Note is deleted in its entirety and the following is inserted in lieu thereof:

The outstanding balance shall bear
interest at a rate of ten percent (10%) per annum, compounded annually based on a 365 day year, until such time as there is no
amount outstanding hereunder. Subject to Section 2 hereof, all outstanding amounts then due under this Note shall be due and payable
within thirty (30) days following the completion of a financing by Maker with the principal purpose of raising capital, pursuant
to which it sells its common stock, preferred stock or other equity securities, with aggregate gross proceeds to Maker of not
less than $5.0 million, excluding any and all indebtedness that is converted into securities issued by Maker in such financing
(the “Qualified Financing”), provided, that, if no such Qualified Financing is completed on or before June
8, 2017, all outstanding amounts under this Note shall be due and payable on June 8, 2017.

    Note   3 - Page 1

     

    

3.                 
Repayment in Stock Upon Qualified Financing. A new Section 2 is hereby inserted immediately after Section
1 of the Restated Note, as amended hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately
to reflect such insertion:

Notwithstanding anything to the contrary,
in the event Maker completes a Qualified Financing, Maker and Lender shall agree to amend this Note, effective upon the closing
of such Qualified Financing, to provide that Maker may elect, in its sole discretion, to repay up to fifty percent (50%) (rounded
down to the nearest whole cent) of the aggregate outstanding amount (the principal amount and all accrued but unpaid interest thereon)
under this Note as of the date of the Qualified Financing (such amount, the “Stock Repayment Amount”) by issuing,
no later than five (5) business days following the date of the closing of the Qualified Financing, shares of Maker’s common
stock, preferred stock or other equity securities (as applicable) issued in such Qualified Financing equal to the Stock Repayment
Amount divided by that number equal to 80% of the price per share of Maker’s equity securities paid by purchasers of such
securities in the Qualified Financing. Lender shall execute such documents and instruments as necessary to participate in the Qualified
Financing, and shall be bound by such transactions and instruments to the same degree as, and have the rights of, the other investors
in the Qualified Financing.

4.                 
Subordination. A new Section 3 is hereby inserted immediately after Section 2 of the Restated Note, as amended
hereby, and the numbering of the other sections of the Restated Note shall be updated appropriately to reflect such insertion:

This Note, the amounts outstanding
hereunder and Maker’s obligations to Lender hereunder shall be subordinated to certain other indebtedness of Maker issued
pursuant to (i) the Accelerator Funding Agreement, dated June 7, 2011, between Maker and the Massachusetts Life Sciences Center,
(ii) the notes issued by Maker pursuant to the Subscription Agreements, dated as of December 23, 2015, December 29, 2015,
December 30, 2015, December 31, 2015, January 21, 2016, January 28, 2016 and February 1, 2016, among Maker and the other lenders
parties thereto, and (iii) the notes, in the form attached here to as Exhibit I, executed and delivered by Maker in a convertible
note financing to be completed on or about the date hereof, in each case as amended and/or restated from time to time.

5.                 
Amendment Provision. This Amendment is entered into by Maker and Lender in a manner consistent with the provisions
of Section 11 of the Restated Note. Except as expressly set forth in this Amendment, the Restated Note is not amended or modified,
Lender has not waived the terms of any of the Restated Note, and the terms and conditions of the Restated Note are ratified and
confirmed and such terms shall remain in full force and effect. In connection with this Amendment and the other amendments to be
entered into by Maker and Lender on or about the date hereof, Maker shall reimburse the reasonable and documented out-of-pocket
fees and expenses of Lender (including those of its legal counsel), in an amount not to exceed $7,500 in the aggregate for all
notes amended on or about the date hereof.

    Note   3 - Page 2

     

    

6.                 
General. Capitalized terms used herein and not defined shall have the meanings ascribed to them in the Restated
Note. This Amendment may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together
shall constitute one and the same instrument. The terms of this Amendment shall be construed in accordance with the laws of the
Commonwealth of Massachusetts, without regard to choice of law provisions.

Legal Disclaimer: Myomo, Inc. may,
in the future, undertake a public offering pursuant to Regulation A under the Act No money or other consideration is being solicited
at this time with respect to such an offering, and if sent in response to these materials for such an offering, it will not be
accepted. No offer to buy securities can be accepted and no part of the purchase price can be received for an offering under Regulation
A until an offering statement is qualified by the U. S. Securities and Exchange Commission, and any such offer may be withdrawn
or revoked, without obligation or commitment of any kind, at any time before notice of its acceptance given after the qualification
date, An indication of interest made by a prospective investor in a Regulation A offering is non-binding and involves no obligation
or commitment of any kind.

 

    Note   3 - Page 3

     

    

 

IN WITNESS WHEREOF, the parties
hereto have executed this Amendment on the date first written above.

	LENDER:	 	MAKER:
	SANDCASTLE LIMITED PARTNERSHIP	 	MYOMO, INC.
	By:
	/s/ Christopher
Archambault	 	By:	 /s/ Paul R. Gudonis
	Name:	Christopher Archambault	 	Paul R. Gudonis 
	Title: 	Duly Authorized	 	Chief Executive Officer

 

 

    Note   3 - Page 4

     

    

THIS SUBORDINATED CONVERTIBLE PROMISSORY
NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO SALE OR DISPOSITION MAY BE EFFECTED EXCEPT IN COMPLIANCE
WITH RULE 144 UNDER SAID ACT OR AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL FOR THE HOLDER SATISFACTORY
TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
COMMISSION.

SUBORDINATED CONVERTIBLE PROMISSORY
NOTE 

 

	$_______________	 	_______________ _____,2016
	 	 	Cambridge, MA

 

For value received Myomo,
Inc., a Delaware corporation (the “Company”), promises to pay to _______________ or its assigns
(“Holder”) the principal sum of $ __________together with accrued and unpaid interest thereon, each due and
payable on the date and in the manner set forth below.

 

This subordinated convertible promissory
note (the “Note”) is issued as part of a series of similar subordinated convertible promissory notes (collectively,
the “Notes”) pursuant to the terms of that certain Subscription Agreement (as may be amended, restated and/or
otherwise modified

from time to time, the “Agreement”)
dated as of _______________ ___, 2016 to the persons and entities listed on the Schedule of Investors attached to the Agreement
(collectively, the “Holders”). Capitalized terms used herein without definition shall have the meanings given
to such terms in the Agreement.

1.                 
Repayment. All
payments of interest and principal shall be in lawful money of the United States of America and shall be made pro rata among all
Holders. All payments shall be applied first to accrued interest, and thereafter to principal. The outstanding principal amount
of the Loan shall be due and payable on December 31, 2018 (the “Maturity Date”), unless earlier converted.

2.                 
Interest Rate. The Company promises to pay the outstanding
principal amount, together with interest thereon accruing on and from the date hereof, at an annual rate equal to 8%, or such lesser
rate permissible by law. Interest on the outstanding principal balance of the Notes shall be computed on the basis of the actual
number of days elapsed and a 365-day year, compounded annually. The interest shall accrue until the Notes are converted or the
Maturity Date.

3.                 
Conversion; Repayment Premium Upon Sale of the Company.

(a)              
In the event that the Company issues and sells shares of its Equity Securities (as defined below) to investors
(the “Investors”) on or before the date of the repayment in full of this Note in an equity financing resulting
in gross proceeds to the Company of at least $5,000,000 (excluding the conversion of the Notes and any other indebtedness) (a “Qualified
Financing”), then the outstanding principal balance of this Note and any accrued but unpaid interest thereon shall automatically
convert in whole without any further action by the Holder into such Equity Securities at a conversion price (the “Conversion
Price”) equal to the lower of: (i) the price per share equal to $35,000,000 divided by the aggregate number of shares
of capital stock outstanding on a fully diluted basis immediately prior to the initial closing of the Qualified Financing and (ii)
eighty percent (80%) of the per share price paid by the Investors in the Qualified Financing.

    Note   3 - Ex-I -
    Page 1

     

    

EXHIBIT I

(b)              
If, after aggregation, the conversion of this Note would result in the issuance of a fractional share, the Company
shall, in lieu of issuance of any fractional share, pay the Holder otherwise entitled to such fraction a sum in cash equal to the
product resulting from multiplying the then current fair market value of one share of the class and series of capital stock into
which this Note has converted by such fraction.

(c)               
Notwithstanding any provision of this Note to the contrary, in the event that the Company consummates a Sale
of the Company (as defined below) prior to the conversion or repayment in full of this Note, the Holder will receive a cash payment
equal the aggregate amount of principal and accrued, but unpaid interest then outstanding under the Note plus an additional amount
equal to twenty five percent (25%) of the original principal amount of this Note. Such amount shall be paid to the Holder in lieu
of the principal and interest that would otherwise be payable on the Maturity Date.

(d)              
For purposes of this Note:

(i)                
“Sale of the Company” shall mean (i) any consolidation or merger of the Company with or into
any other corporation or other entity or person, or any other corporate reorganization, other than any such consolidation, merger
or reorganization in which the stockholders of the Company immediately prior to such consolidation, merger or reorganization, continue
to hold at least a majority of the voting power of the surviving entity in substantially the same proportions (or, if the surviving
entity is a wholly owned subsidiary, its parent) immediately after such consolidation, merger or reorganization; (ii) any transaction
or series of related transactions to which the Company is a party in which more than 50% of the voting power in the Company”
s capital stock is transferred; provided, however, that a Sale of the Company shall not include any transaction or
series of transactions principally for bona fide equity financing purposes in which cash is received by the Company or any successor
or indebtedness of the Company is cancelled or converted or a combination thereof; or (iii) a sale, lease, exclusive license or
other disposition of all or substantially all of the assets of the Company.

(ii)              
“Equity Securities” shall mean the Company’s Common Stock or Preferred Stock or any
securities conferring the right to purchase the Company’s Common Stock or Preferred Stock or securities convertible into,
or exchangeable for (with or without additional consideration), the Company’s Common Stock or Preferred Stock, except that
such defined term shall not include any security (x) granted, issued and/or sold by the Company to any employee, director or consultant
in such capacity or (y) issued upon the conversion or exercise of any option or warrant outstanding as of the date of this Note.

    Note   3 - Ex-I -
    Page 2

     

    

EXHIBIT I

 

(e)               
Except for the rights to obtain certificates representing Equity Securities upon conversion of this Note, all
rights with respect to this Note shall terminate upon the effective conversion or repayment of the entire outstanding balance of
this Note and any accrued but unpaid interest thereon, whether or not this Note has been surrendered to the Company for cancellation.

4.                 
Maturity. Unless this Note has been previously converted
or satisfied in accordance with the terms of Section 3 above, the entire outstanding principal balance and all unpaid accrued interest
shall become fully due and payable on the Maturity Date.

5.                 
Expenses. In the event of any default hereunder, the Company
shall pay all reasonable attorneys’ fees and court costs incurred by Holder in enforcing and collecting this Note.

6.                 
Prepayment. The Company may prepay this Note in whole or
in part at anytime; provided, that any partial payment of principal shall be accompanied by payment of accrued interest to the
date of prepayment. Any payment made to the holders of the Notes which is not a full payment of all principal and interest on all
of the Notes shall be made pro rata to the holders of the Notes based on the respective principal amounts of the Notes,

7.                 
Default. If there shall be any Event of Default hereunder,
at the option and upon the declaration of the Requisite Holders and upon written notice to the Company (which election and
notice shall not be required in the case of an Event of Default under Section 7(c) or 7(d)), this Note shall accelerate and all
principal and unpaid accrued interest shall become due and payable. The occurrence of any one or more of the following shall constitute
an “Event of Default”:

(a)              
The Company fails to pay timely any of the principal amount, accrued interest of other amounts due under this
Note on the applicable due date and such failure continues for five (5) days;

(b)              
The Company shall default in its performance of any covenant under the Agreement or any Note and such default
persists beyond any applicable cure period;

(c)               
The Company files any petition or action for relief under any bankruptcy, reorganization, insolvency or moratorium
law or any other law for the relief of, or relating to, debtors, now or hereafter in effect, or makes any general assignment for
the benefit of creditors or takes any corporate action for the purpose of effecting any of the foregoing; or

(d)              
An involuntary petition is filed against the Company in any court of competent jurisdiction under any bankruptcy
statute now or hereafter in effect and such proceeding continues undismissed or unstayed and in effect for any period of 90 consecutive
days, or a custodian, receiver, trustee, assignee for the benefit of creditors (or other similar official) is appointed to take
possession, custody or control of any property of the Company.

    Note   3 - Ex-I -
    Page 3

     

    

EXHIBIT I

8.                 
Future Notes. If, while this Note is outstanding, the Company
issues other indebtedness of the Company convertible into Equity Securities of the Company with material terms that are more favorable,
from the perspective of the Holder (“Other Debt”), than the terms of this Note (other than with respect to principal
amount, interest and maturity date), then the Company will provide the Holder with written notice thereof, together with a copy
of all documentation relating to such Other Debt and, upon request of the Holder, any additional information related to such Other
Debt as may be reasonably requested by the Holder. The Company will provide such notice to Holder promptly (and in any event within
30 days) following the issuance of such Other Debt. In the event the Requisite Holders determine that the terms of the Other Debt
are preferable to the terms of this Note, the Requisite Holders may, but are not obligated to, notify the Company in writing within
5 days following receipt of such notice from the Company that they are electing, on behalf of themselves and the other Holders
of the Notes, to exchange the Notes for the Other Debt. Promptly after receipt of such written notice from the Requisite Holders,
but in any event within 30 days, the Company will amend and! restate this Note to be substantially identical to promissory note
evidencing the Other Debt., excluding principal amount, interest and maturity date. If the Requisite Holders do not notify the;
Company of such an election described in this Section 8 within the 5 days, the Holders shall be deemed to have waived their right
to exchange their Notes for the Other Debt in such instance.

9.                 
Waiver. The Company hereby waives demand, notice, presentment,
protest and notice of dishonor.

10.             
Governing Law. This Note shall be governed by and construed
under the laws of the State of Delaware, as applied to agreements among Delaware residents, made and to be performed entirely within
the State of Delaware, without giving effect to conflicts of laws principles.

11.             
Parity with Other Notes and Other Indebtedness; Subordination.

(a)              
The Company’s repayment obligation to the Holder under this Note shall! be on parity with the Company’s
obligation to repay all Notes issued pursuant to the Agreement and the convertible promissory notes issued by the Company pursuant
to the Subscription Agreements, dated as of December 23, 2015, December 29, 2015, December 30, 2015, December 31, 2015, January
21, 2016, January 28, 2016 and February 1, 2016, among the Company and the lenders parties thereto, as may be amended, restated
and/or otherwise modified from time to time. In the event that the Company is obligated to repay the Notes and does not have sufficient
funds to repay all the Notes in full, payment shall be made to the Holders of the Notes on a pro rata basis. The preceding
sentence shall not, however, relieve the Company of its, obligations to the Holder hereunder.

(b)              
The Company’s repayment obligation to the Holder under this Note shall be subordinated to certain other
indebtedness of the Company issued to pursuant to the Accelerator Funding Agreement, dated June 7, 2011, between the Company and
the Massachusetts Life Sciences Center, as may be amended from time to time, and any other senior indebtedness of the Company hereafter
issued, including, but not limited to commercial bank, lenders and venture debt lenders (collectively, “Senior Lenders”).
Notwithstanding anything herein to the contrary. Holder hereby agrees that the Company’s failure to pay any amounts or otherwise
comply with any terms or provisions of this Note as a result of its obligations to the Senior Lenders pursuant to any subordination
agreement to which the Company and any Senior Lender is a party shall not constitute a default or an Event of Default under this
Note.

    Note   3 - Ex-I -
    Page 4

     

    

EXHIBIT I

12.             
Modification; Waiver. Any term of this Note may be amended
or waived with the written consent of the Company and the Requisite Holders, which amendment or waiver shall apply to all the Notes
and shall be binding on all the Holders thereof.

13.             
Assignment. This Note may be transferred only upon its surrender
to the Company for registration of transfer, duly endorsed, or accompanied by a duly executed written instrument of transfer in
form satisfactory to the Company. Thereupon, this Note shall be reissued to, and registered in the name of, the transferee, or
a new Note for like principal amount and interest shall be issued to, and registered in the name of, the transferee. Notwithstanding
anything to the contrary, the Company may elect not to permit a transfer of the Note if it has not obtained satisfactory assurance
that such transfer: (a) is exempt from the registration requirements of, or covered by an effective registration statement under,
the Act, and the rules and regulations thereunder and (b) is in compliance with all applicable state securities laws, including
without limitation receipt of an opinion of counsel, which opinion shall be satisfactory to the Company. Interest and principal
shall be paid solely to the registered holder of this Note. Such payment shall constitute full discharge of the Company’s
obligation to pay such interest and principal.

14.             
Notices. Unless otherwise provided, any notice required
or permitted under tins Note shall be given in the same manner as provided in the Agreement.

Legal Disclaimer: The Company is
currently undertaking a private placement offering pursuant to Section 4(a)(2) of the Act, and/or Rule 506 of Regulation D promulgated
thereunder, The Company may, in the future, undertake a public offering pursuant to Regulation A under the Act. No money or other
consideration is being solicited at this time with respect to such an offering, and if sent in response to these materials for
such an offering, it will not be accepted. No offer to buy securities can be accepted and no part of the purchase price can be
received for an offering under Regulation A until an offering statement is qualified by the U. S. Securities and Exchange Commission,
and any such offer may be withdrawn or revoked, without obligation or commitment of any kind at any time before notice of its acceptance
given after the qualification dale. An indication of interest made by a prospective investor in a Regulation A offering is non-binding
and involves no obligation or commitment of any kind.

[signature page follows]

    Note   3 - Ex-I -
    Page 5

     

    

 EXHIBIT I 

 

	 	Myomo, Inc.
	 	 
	 	By: 	
	 	Name:

        Title:
	
	 	 	 
	Holder:	 	 	 
	Principal Amount of Note:	 	 	 
	Date of Note	 	 	 

 

    [Signature page to Subordinated Convertible Promissory Note of Myomo, Inc.]

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