Base Rent Adjustments. Base Rent shall be increased on the annual anniversary of the first day of the first full month during the Term of this Lease (each an “Adjustment Date”) by multiplying the Base Rent payable immediately before such Adjustment Date by the Rent Adjustment Percentage and adding the resulting amount to the Base Rent payable immediately before such Adjustment Date. Base Rent, as so adjusted, shall thereafter be due as provided herein. Base Rent adjustments for any fractional calendar month shall be prorated.

Base Rent Abatement. Provided that Tenant is not then in default of the terms of the Lease, after expiration of any applicable notice and cure periods, Tenant will have no obligation to pay any Base Rent with respect to the Substitute Premises for the period for the first (1st) month of the Substitute Premises Term. Notwithstanding the foregoing, Tenant’s Share of annual Direct Expenses shall not be abated during the Substitute Premises Term.

Additional Monthly Base Rent. As a result of Tenant's use of the Utilized Additional TI Allowance, Tenant is required to pay Additional Monthly Base Rent calculated as provided in Section 4 of the Tenant Work Letter, which Additional Monthly Base Rent shall be equal to $ per month, payable on or before the first (1st) day of each month commencing as of , and continuing through the expiration of the initial Lease Term.

Estimated Initial Base Rent. Based upon the Preliminary Total Development Cost Estimate, the initial annual Base Rent that would be initially owing under the Lease would be $35.89/RSF (the “Preliminary Base Rent”), which amount has been determined as set forth in Exhibit J. However, ​ and ​ acknowledge that the initial Base Rent actually payable under the Lease, will be based upon the Total Development Costs actually incurred by ​ but not to exceed, in the aggregate, the amount of the Final Total Development Costs Budget (plus any increases in Total Development Costs incurred as a consequence of ​ requested Changes paid for by ​ and costs resulting from ​ Delay) provided for in Section 3.2 and determined in accordance with Exhibit J.

First Month’s Base Rent. Upon execution hereof by Subtenant, Subtenant shall pay to Sublandlord One Hundred Thirty-Nine Thousand Four Hundred Seventy and 06/100 Dollars ($139,470.06), which shall constitute Base Rent for the first (1st) month of the Term.

Rent. All Rent and other payments required to be made by Tenant to Landlord hereunder shall be payable to Landlord at Landlord’s Remittance Address set forth in the Basic Lease Information, or at such other address as Landlord may specify from time to time by written notice delivered in accordance herewith. Tenant’s obligation to pay Rent and any other amounts to Landlord under the terms of this Lease shall not be deemed satisfied until such Rent and other amounts have been actually received by Landlord.

RENT. LESSEE shall pay LESSOR base rent of one hundred five thousand nine hundred ninety nine (105,999) U.S. dollars per year, drawn on a U.S. bank, in monthly installments of $8,833.25 on or before the first day of each calendar month, without offset or deduction. One monthly rental payment, plus an appropriate traction of a monthly payment for any portion of a month at the commencement of the lease term, shall be made upon LESSEE’S execution of this lease. All payments shall be made to LESSOR at 200 West Cummings Park, Woburn, Massachusetts 01801, or at such other place designated in writing by LESSOR. If the “Cost of Living” has increased as shown by the Consumer Price Index (Boston, Massachusetts, all items, all urban consumers), U.S. Bureau of Labor Statistics (“Index”), then base rent due during each calendar year of this lease and all extensions thereof shall be adjusted in proportion to any increase in the Index. The base month from which to determine the amount of each increase shall be January 2016, which figure shall be compared with the figure for November 2016, and each November thereafter to determine the increase (if any) in base rent to be paid during the following calendar year commencing each January 1.

Plus: Property Rent Expense (base rent + any % rent)

All monthly installments of Base Rent, all Additional Rent and all monthly installments of estimated Additional Rent have been paid when due through . The current monthly installment of Base Rent is $ .

Base Rent became payable on .