Tenant Improvements Defined. As used herein, “Tenant Improvements” shall mean all improvements to the Premises of a fixed and permanent nature as shown on the Tl Construction Drawings, as defined in [Section 2(c)] below. Other than Landlord’s Work (as defined in Section 3(a) below), Landlord shall not have any obligation whatsoever with respect to the finishing of the Premises for Tenant’s use and occupancy. Landlord and Tenant acknowledge and agree that a portion of the Premises, as reflected in the Space Plan, will not be improved as part of the Tenant Improvements as Tenant has indicated that it does not require that such portion of the Premises be improved in connection with its operations in the Premises. Upon request from Tenant, Landlord shall provide Tenant with notice of planned meetings regarding the design and construction of the tenant improvements. Tenant shall have a right to have a representative present for all design and construction meetings relating to the Tenant Improvements.

Tenant Improvement Allowance. Subject to any restrictions, conditions or limitations expressly set forth in this Tenant Work Letter or in the Lease or as otherwise expressly provided by mutual written agreement of Landlord and Tenant, the cost of construction of the Tenant Improvements shall be paid or reimbursed by Landlord up to a maximum amount as set forth in Section 5 of the Summary to the Lease (the "Tenant Improvement Allowance"), which amount is being made available by Landlord to be applied towards the Cost of Improvements for the construction of the Tenant Improvements in the Premises. Tenant shall be responsible, at its sole cost and expense, for payment of the entire Cost of Improvements of the Tenant Improvements in excess of the Tenant Improvement Allowance, including (but not limited to) any costs or cost increases incurred as a result of delays (unless caused by Landlord), governmental requirements or unanticipated conditions (unless caused by Landlord), and for payment of any and all costs and expenses relating to any alterations, additions, improvements, furniture, furnishings, equipment, fixtures and personal property items which are not eligible for application of Tenant Improvement Allowance funds under the restrictions expressly set forth below in this paragraph, but Tenant shall be entitled to use or apply the entire Tenant Improvement Allowance toward the Cost of Improvements of the Tenant Improvements (subject to any applicable restrictions, conditions, limitations, reductions or charges set forth in the Lease or in this Tenant Work Letter) prior to being required to expend any of Tenant’s own funds for the Tenant Improvements. The funding of the Tenant Improvement Allowance shall be made on a monthly basis or at other convenient intervals mutually approved by Landlord and Tenant and in all other respects shall be based on such commercially reasonable disbursement conditions and procedures as Landlord, Project Manager and Landlord’s lender (if any) may reasonably prescribe. Notwithstanding the foregoing provisions, under no circumstances shall the Tenant Improvement Allowance or any portion thereof be used or useable by Tenant for any moving or relocation expenses of Tenant, or for any Cost of Improvement (or any other cost or expense) associated with any moveable furniture or trade fixtures, personal property or any other item or element which, under the applicable provisions of the Lease, will not become Landlord’s property and remain with the Building upon expiration or termination of the Lease, and except as otherwise expressly provided in this Tenant Work Letter or expressly approved by Landlord in writing, any portion of the Tenant Improvement Allowance which has not been claimed or drawn by Tenant prior to the later to occur of # the date that is 18 months after the Lease Commencement Date, and # the date of receipt of the Substantial Completion Certificate, shall expire and shall no longer be available to Tenant thereafter. Notwithstanding anything to the contrary herein, the Tenant Improvements shall not include (and Landlord shall be solely responsible for and the Tenant Improvement Allowance shall not be used for) the following: # costs incurred due to the presence of any Hazardous Materials in the Premises, if any; # costs to bring the Project into compliance with Applicable Laws to the extent required in order to allow Tenant to obtain a certificate of occupancy or its [[Organization A:Organization]] equivalent, for the Premises for the Permitted Use assuming a normal and customary office occupancy density;

Tenant Improvement Allowance. The Work Letter shall be modified as follows: Landlord shall provide Tenant with an allowance in an amount equal to $8,422,350.00 (based on $75.00 per 112,298 rentable square feet) (the "Allowance") to be applied towards the hard and soft cost of designing, permitting, managing and constructing Tenant Improvements (as that term is defined in the Work Letter). The Allowance shall be paid as follows:

Disbursement of Tenant Improvement Allowance. Landlord shall disburse the Tenant Improvement Allowance on a progress payment basis during the construction of the Tenant Improvements, as set forth in this Section 6.5.

Tenant Lobby Furnishings. Tenant may notify Landlord in writing, on or before September 15, 2015, if Tenant elects to include any of the lobby reception desk, furniture or furnishings within the Tenant Improvements and exclude any of the foregoing items from the Base Building Improvements (“Tenant Takeover Lobby Furnishings”). If Tenant elects to provide or construct any Tenant Takeover Lobby Furnishings as part of the Tenant Improvements, Landlord shall provide an allowance (in addition to the Tenant Improvement Allowance) to fully reimburse Tenant for its costs incurred in connection with the Tenant Takeover Lobby Furnishings in an amount equal to the corresponding costs of such items included in Landlord’s budget for the Base Building Improvements (“Additional Lobby Allowance”). Such Tenant Takeover Lobby Furnishings shall be included in the Preliminary Plans and Final Working Drawings, as and to the extent applicable, submitted to Landlord for approval pursuant to Section 2.2 and the disbursement of the Additional Lobby Allowance shall be subject to the same conditions set forth in Section 6.5 with respect to the disbursement of the Tenant Improvement Allowance

To the extent that the total projected cost of the Tenant Improvements (as projected or approved by Landlord) exceeds the TI Allowance (such excess, the “Excess TI Costs”), Tenant shall pay the costs of the Tenant Improvements on a pari passu basis with Landlord as such costs are paid, in the proportion of such Excess TI Costs payable by Tenant to the TI Allowance payable by Landlord. If the entire Excess TI Costs advanced by Tenant to Landlord are not applied toward the costs of the Tenant Improvements, then Landlord shall promptly return such excess to Tenant following completion of all of the Tenant Improvements.

requirements and approvals relating to the Tenant Improvements in the Expansion Space, # construction management services relating to the Tenant Improvements in the Expansion Space, and # any and all costs, expenses, fees and charges incurred in connection with the Tenant Improvements in the Expansion Space and/or the items described in [(i) through (iv) above]. If the Expansion Tenant Improvement Allowance is insufficient to defray the entire cost of the Tenant Improvements, the balance shall be paid entirely by Tenant pursuant to the terms and conditions specified in [Exhibit D] to the Lease; provided, however, Tenant will not be required to pay any amount until the Landlord has paid the Expansion Tenant Improvement Allowance stated above less retainage equaling ten percent (10%) of the total cost of constructing the Tenant Improvements in the Expansion Premises, which shall be deliberately withheld until completion to assure that the contractor and/or subcontractors satisfy their obligations in performing the approved improvements and/or approved work related thereto. Landlord has no obligation to advance more than the Expansion Tenant Improvement Allowance for any items under any circumstances.

Ownership of Tenant Improvements. The Tenant Improvements (including, but not limited to, all partitioning, window and wall coverings, and plumbing, lighting, electrical, and HVAC fixtures installed by Tenant) shall be deemed, effective upon installation, to be a part of the Premises and the Building and shall be deemed to be the property of Landlord (subject to Tenant’s right to use the same during the Term of the Lease), and shall be surrendered at the expiration or earlier termination of the Term, unless Landlord shall have reasonably conditioned its approval of the Final Working Drawings or any Plan Modification pursuant to [Section 2.2.1 or 2.2.6]6], as applicable, on Tenant’s agreement to remove any items thereof. The removal of such items and the restoration and repair work described above shall be paid for and performed in accordance with the provisions of Paragraph 36 of the Lease.

Cost of Tenant Improvements. The cost of the design, construction and installation of the Tenant Improvements shall be borne as follows:

Permitted Allowance Items. The Tenant Improvement Allowance shall be disbursed by Landlord only for the payment or reimbursement of the following items and costs (collectively, the “Permitted Allowance Items”): # costs of preparing the Space Plan, the Preliminary Plans, and the Approved TI Construction Drawings, # the cost of obtaining Permits, # the documented cost of performing the Tenant Improvement Work, including the cost of procuring, constructing and installing all construction materials, # the cost of any change to the Base Building Improvements required by the Approved TI Construction Drawings, including all direct architectural and/or engineering fees and expenses incurred in connection therewith, and # the costs and fees related to the management and supervision of the Tenant Improvement Work for Tenant’s benefit. From time to time during the course of construction, Landlord may charge against the Tenant Improvement Allowance any and all Permitted Allowance Items incurred by Landlord, including, without limitation, any increased costs incurred by Landlord as a result of, or in connection with, Plan Modifications or any Tenant Delay. Permitted Allowance Items shall not include furnishings, fixtures, equipment and other personal property, including cabling, switches, servers, routers and similar data and telecommunications equipment costs.

as to any completed Approved First Logistics Construction Allowance Expenses in excess of ​, a copy of any license, permit or other approval by any Governmental Authority required, if any, in connection with such tenant improvements and not previously delivered to the Agent;

Books and Records. At its option, Landlord, at any time within twelve (12) months after final disbursement of the Tenant Improvement Allowance to Tenant, and upon at least ten (10) Business Days prior written notice to Tenant, may cause an audit to be made of Tenant’s books and records relating to Tenant’s expenditures in connection with the construction of the Tenant Improvements. Tenant shall maintain complete and accurate books and records in accordance with generally accepted accounting principles of these expenditures for at least twelve (12) months after final disbursement of the Tenant Improvement Allowance to Tenant. Tenant shall make available to Landlord’s auditor at the Premises within ten (10) Business Days following Landlord’s notice requiring the audit, all books and records maintained by Tenant pertaining to the construction and completion of the Tenant Improvements. In addition to all other remedies which Landlord may have pursuant to the Lease, Landlord may recover from Tenant the reasonable cost of its audit if the audit discloses that Tenant falsely reported to Landlord expenditures which were not in fact made or falsely reported a material amount of any expenditure or the aggregate expenditures.

Improvements. Subtenant shall make no improvements without Sublandlord’s and Master Landlord’s consent which may be withheld in their sole discretion.

Improvements. WuXi ATU shall own all right, title, and interest in any Improvements in WuXi ATU Property that is generally applicable for the manufacture and testing of biological products and does not specifically rely upon Graphite Property.

Additional TI Allowance. Pursuant to the terms of Section 4 of the Tenant Work Letter attached to the Lease as Exhibit B, Tenant was entitled to an Additional TI Allowance of up to $ (the "Additional TI Allowance"). Notwithstanding any provision to the contrary contained in the Lease, Landlord and Tenant hereby acknowledge and agree that Tenant has utilized and /100 Dollars ($ . ) of the Additional TI Allowance (the "Utilized Additional TI Allowance").

Construction of Landlord's TI Work. Following completion of the Approved TI Plans, Landlord shall apply for and use reasonable efforts to obtain the necessary permits and approvals to allow construction of all Tenant Improvements; provided, however, at Tenant’s reasonable request, Landlord shall submit an earlier set of plans for plan check while the parties work to obtain the Approved TI Plans. Upon receipt of such permits and approvals, Landlord shall, at Tenant's expense (subject to Landlord's payment of the Tenant Improvement Allowance and, to the extent requested by Tenant, the Additional TI Allowance), construct and complete the Tenant Improvements substantially in accordance with the Approved TI Plans, subject to Unavoidable Delays and Tenant Delays (if any). Landlord shall use commercially reasonable efforts to complete the Tenant Improvements on or before ​, subject to Unavoidable Delays and Tenant Delays (if any). Such construction of the Tenant Improvements and Landlord’s Work shall be performed in a neat, good and workmanlike manner, free of defects, using new materials and equipment of good quality, and shall materially conform to all applicable laws, rules, regulations, codes, ordinances, requirements, covenants, conditions and restrictions applicable thereto in force at the time such work is completed. Landlord shall cause Hathaway Dinwiddie (so long as obtaining such bid does not delay the completion of Landlord’s TI Work), Landmark Builders, Dome Construction, XL Construction and any other potential general contractors requested by Tenant and reasonably approved by Landlord to bid on general conditions and fee for construction of the Tenant Improvements. All bids will be opened together with Tenant selecting the general contractor to construct the Tenant Improvements, subject to the reasonable approval of Landlord. Tenant shall have the right to value engineer the proposed Tenant Improvements before the final bid is selected. Tenant shall also have the right to approve all subcontractors engaged by the General Contractor, which subcontractors shall be competitively bid, and which approval shall not be unreasonably withheld, conditioned or delayed. Landlord shall enter into a stipulated sum or guaranteed maximum price construction contract with the General Contractor as selected by Tenant and approved by Landlord in the amount of the construction costs approved by Landlord and Tenant.

Allowance. Paragraph 11 of the First Amendment is deleted and replaced with the following:

Coordination. Prior to the commencement of construction of the Tenant Improvements, Landlord and Tenant shall hold monthly meetings at a reasonable time to be agreed upon by Landlord and Tenant regarding the progress of the Base Building Improvements and the progress of the design of the Tenant Improvements. Tenant shall obtain independent bids or proposals for construction of the Tenant Improvements from at least three (3) general contractors approved by

Space Planning Allowance. In addition to the ES Allowance, and as a further inducement to Tenant’s entering into this Fourth Amendment, Landlord shall, subject to this [Section 5], provide to Tenant a special tenant improvement allowance equal to ​ (the “Space Planning Allowance”) to be used by Tenant solely for design and architectural costs incurred by Tenant for space planning the Expansion Space. Provided there is no Event of Default or event which, with the passage of time and/or the giving of notice would constitute an Event of Default, Landlord shall pay the Space Planning Allowance to Tenant within thirty (30) days after the later to occur of # Landlord’s receipt of the draft ES Design/Development Plans, and # Landlord’s receipt of a reasonably detailed invoice therefor, which invoice must be delivered to Landlord on or before the date which is sixty (60) days after the ES Commencement Date; provided, however, that if Tenant cures any default prior to the expiration of applicable cure periods set forth in [Article 20] of the Lease, then Landlord’s obligation to pay the Space Planning Allowance shall be reinstated. Tenant shall not be entitled to any unused portion of the Space Planning Allowance.