Landlord’s Repairs. Anything contained in [Section 7.1] above to the contrary notwithstanding, and subject to Articles 11 and 12 below, Landlord, at its sole cost and expense (and not as an operating expense) shall repair, maintain and replace the structural portions of the Building (including the roof, floor and ceiling slabs, exterior walls, structural columns and load bearing walls, building façade, utility lines serving the building (to the extent not the responsibility of the utility company), and the foundation of the Building); provided, however, to the extent such maintenance, repairs or repairs are caused by the act, neglect, fault of or omission of any duty by Tenant, its agents, servants, employees or invitees, Tenant shall pay to Landlord as Additional Rent, the reasonable cost of such maintenance and repairs. Tenant shall promptly give Landlord written notice of any repair required by Landlord pursuant to this [Section 7.2] of which Tenant becomes aware. Landlord shall not be in default for any failure to make any such repairs, unless such failure shall persist for 30 days after Tenant’s written notice (or, if earlier, after Landlord otherwise had notice or should have been aware) of the need for such repairs. Except as otherwise provided herein, there shall be no abatement of rent and no liability of Landlord by reason of any injury to or interference with Tenant’s business arising from the making of any repairs, alterations or improvements in or to any portion of the Project, Building or the Premises or in or to fixtures, appurtenances and equipment therein; provided that Landlord does not interrupt any building services or utilities and provides Tenant reasonable advance notice.

Landlord’s Repairs. Landlord shall, at Landlord’s sole expense (and not as an Operating Expense), be responsible for capital repairs and replacements of the roof (not including the roof membrane), exterior walls and foundation of the Building (“Structural Items”) unless the need for such repairs or replacements is caused by Tenant or any Tenant Parties, in which case Tenant shall bear the full cost to repair or replace such Structural Items. Landlord shall, as an Operating Expense, be responsible for the routine maintenance and repair of such Structural Items. Landlord, as an Operating Expense (except to the extent the cost thereof is excluded from Operating Expenses pursuant to Section 5 hereof), shall maintain, repair and replace the roof membrane and all of the exterior, parking and other Common Areas of the Project, including HVAC, electrical, mechanical, plumbing, life safety systems (including fire sprinklers), elevators and all other building systems serving the Premises and other portions of the Project (collectively, “Building Systems”), in good repair, reasonable wear and tear and uninsured losses and damages caused by Tenant,

Landlord’s Repairs. Landlord, as an Operating Expense (except to the extent the cost thereof is excluded from Operating Expenses pursuant to Section 5 hereof), shall maintain all of the structural, exterior, parking and other Common Areas of the Project, including HVAC, plumbing, fire sprinklers, elevators and all other building systems serving the Premises and other portions of the Project (“Building Systems”), in good repair, reasonable wear and tear and uninsured losses and damages (unless such losses or damages would have been insured losses or expenses if the insurance Landlord is required to maintain hereunder had been obtained and so long as it would make reasonable business sense to Landlord, bearing in mind the potential amount of the losses and damages and the amount of the applicable deductibles, to submit a claim for such losses and damages to its insurer) caused by Tenant, or by any of Tenant’s assignees, sublessees, licensees, agents, servants, employees, invitees and contractors (or any of Tenant’s assignees, sublessees and/or licensees respective agents, servants, employees, invitees and contractors) (collectively, “Tenant Parties”) excluded. Subject to the provisions of the penultimate paragraph of Section 17, losses and damages caused by Tenant or any Tenant Party shall be repaired by Landlord, at Tenant’s sole cost and expense, to the extent not covered by insurance Landlord is required to maintain hereunder (or to the extent such losses or damages would have been covered by insurance Landlord is required to maintain hereunder if such insurance had been maintained and so long as it would make reasonable business sense to Landlord, bearing in mind the potential amount of the losses and damages and the amount of the applicable deductibles, to submit a claim for such losses and damages to its insurer). Landlord reserves the right to stop Building Systems services when necessary # by reason of accident or emergency, or # for planned repairs, alterations or improvements, which are, in the judgment of Landlord, desirable or necessary to be made, until said repairs, alterations or improvements shall have been completed. Landlord shall have no responsibility or liability for failure to supply Building Systems services during any such period of interruption; provided, however, that Landlord shall, except in case of emergency, give Tenant 48 hours advance notice of any planned stoppage of Building Systems services for routine maintenance, repairs, alterations or improvements. Landlord shall use reasonable efforts to minimize interruption to Tenant’s business during such planned stoppages of Building Systems. Tenant shall promptly give Landlord written notice of any repair required by Landlord pursuant to this Section, after which Landlord shall make a commercially reasonable effort to effect such repair. Landlord shall not be liable for any failure to make any repairs or to perform any maintenance unless such failure shall persist for an unreasonable time after Tenant’s written notice of the need for such repairs or maintenance. Tenant waives its rights under any state or local law to terminate this Lease or to make such repairs at Landlord’s expense and agrees that the parties’ respective rights with respect to such matters shall be solely as set forth herein. Notwithstanding anything to the contrary contained herein, repairs required as the result of fire, earthquake, flood, vandalism, war, or similar cause of damage or destruction shall be controlled by Section 18.

Landlord’s Repairs. Landlord, as an Operating Expense, shall maintain all of the structural, exterior, parking and other Common Areas of the Project, including HVAC, plumbing, fire sprinklers, elevators and all other building systems serving the Premises and other portions of the Project (“Building Systems”), in good repair, reasonable wear and tear and uninsured losses and damages caused by Tenant, or by any of Tenant’s assignees, sublessees, licensees, agents, servants, employees, invitees and contractors (or any of Tenant’s assignees, sublessees and/or licensees respective agents, servants, employees, invitees and contractors) (collectively, “Tenant Parties”) excluded. Losses and damages caused by Tenant or any Tenant Party shall be repaired by Landlord, to the extent not covered by insurance, at Tenant’s sole cost and expense. Landlord reserves the right to stop Building Systems services when necessary # by reason of accident or emergency, or # for planned repairs, alterations or improvements, which are, in the judgment of Landlord, desirable or necessary to be made, until said repairs, alterations or improvements shall have been completed. Landlord shall have no responsibility or liability for failure to supply Building Systems services during any such period of interruption; provided, however, that Landlord shall, except in case of emergency, shall give not less than Tenant 24 hours’ advance notice of any planned stoppage of Building Systems services for routine maintenance, repairs, alterations or improvements. Tenant shall promptly give Landlord written notice of any repair required by Landlord pursuant to this Section, after which Landlord shall make a commercially reasonable effort to effect such repair. Landlord shall not be liable for any failure to make any repairs or to perform any maintenance unless such failure shall persist for an unreasonable time after Tenant’s written notice of the need for such repairs or maintenance. Tenant waives its rights under any state or local law to terminate this Lease or, except as otherwise set forth in Section 31 with respect to Tenant’s self-help rights, to make such repairs at Landlord’s expense and agrees that the parties’ respective rights with respect to such matters shall be solely as set forth herein. Repairs required as the result of fire, earthquake, flood, vandalism, war, or similar cause of damage or destruction shall be controlled by Section 18.

Landlord’s Repairs. Landlord, as an Operating Expense, shall maintain all of the structural, exterior, parking and other Common Areas of the Project, including HVAC, plumbing, fire sprinklers, elevators and all other building systems serving the Premises and other portions of the Project (“Building Systems”), in good repair, reasonable wear and tear and uninsured losses and damages caused by Tenant, or by any of Tenant’s assignees, sublessees, licensees, agents, servants, employees, invitees and contractors (or any of Tenant’s assignees, sublessees and/or licensees respective agents, servants, employees, invitees and contractors) (collectively, “Tenant Parties”) excluded. Losses and damages caused by Tenant or any Tenant Party shall be repaired by Landlord, to the extent not covered by insurance, at Tenant’s sole cost and expense. Landlord reserves the right to stop Building Systems 45/47 Wiggins – Suites 100 & 200/Stoke - Page 13

Landlord’s Repairs. Landlord shall, in accordance with the Maintenance Standard (as defined below), maintain the following: # as an Operating Expense (subject to the provisions of Section 5), exterior glass, caulking, tuck pointing, brick repair, Building façade, repair or replacement of roof membrane, exterior portions of the Building, landscaping, and parking areas (both surface and the Parking Garage), including snow and ice removal from the parking areas and sidewalks, and # at Landlord’s expense and not as an Operating Expense, the repair or replacement of the roof, foundation, slab, and structural walls of the Building, correction of defects in the original construction of the Building, any repair or replacement to the extent covered under any warranties of Landlord’s contractors or vendors, and of any damage to the Premises caused by the gross negligence or willful misconduct of Landlord or its employees. Losses and damages caused by Tenant, or by any of Tenant’s agents, servants, employees, invitees, and contractors (collectively, “Tenant Parties”), shall be repaired by Landlord, to the extent not covered by insurance, at Tenant’s sole cost and expense. Landlord reserves the right to stop Building Systems (as defined in [Section 14(a)]) services when necessary by reason of accident or emergency. Except as otherwise expressly provided in this Lease, Landlord shall have no responsibility or liability to supply Building Systems services during any such period of interruption; provided, however, that Landlord shall # except in case of emergency, give Tenant at least 3 business days’ advance notice of any planned stoppage of Building Systems services for routine maintenance, repairs, alterations, or improvements, and # use all commercially reasonable efforts to minimize the extent and duration of such stoppage (including, where practicable, performing any such maintenance, repairs, alterations, or improvements at times and in manner that will minimize any stoppage of Building Systems services during normal business hours). Tenant waives its rights under any Legal Requirement to terminate this Lease or to make such repairs at Landlord’s expense and agrees that the parties’ respective rights with respect to such matters shall be solely as set forth herein. Repairs required as the result of fire, earthquake, flood, or other casualty, vandalism, war, or similar cause of damage or destruction shall be controlled by [Section 18]. Repairs required as a result of a Taking (as defined in [Section 19]) shall be controlled by [Section 19]. For purposes of this Lease, “Maintenance Standard” means the standards customarily maintained by owners of Class A office/laboratory buildings in the Gaithersburg/[[Address B:Address]] market of comparable size and age, reasonable wear and tear excepted, and in compliance with all applicable Legal Requirements.

Landlord’s Repairs. Landlord shall also have the right to take all material into the Premises that may be required for the purposes set forth in the foregoing Section 16.01 without the same constituting a constructive eviction of Tenant, in whole or in part, and Rent shall not abate (except as provided in Article 12) while said repairs, alterations, improvements or additions are being made, by reason of loss or interruption of business of Tenant, or otherwise. Subject to Section 16.01, if Tenant shall not be personally present to open and permit entry into the Premises, at any time, when for any reason entry therein shall be necessary or desirable, Landlord or Landlord’s agents may enter the Premises by a master key, or may forcibly enter the same, without rendering Landlord or such agents liable therefor (if during such entry Landlord or Landlord’s agents shall accord reasonable care to Tenant’s property), and without in any manner affecting the obligations and covenants of this Lease.

Landlord’s Repairs. Landlord, as an Operating Expense (except to the extent excluded from Operating Expenses pursuant to Section 5), shall maintain all of the structural, exterior, parking and other Common Areas of the Project, Including the roof, HVAC, plumbing, Are sprinklers, elevators and all other building systems serving the Premises and other portions of the Project (“Building Systems”), in good repair, reasonable wear and tear and uninsured losses and damages caused by Tenant, or by any of Tenant’s agents, servants, employees, invitees and contractors (collectively, “Tenant Parties”) excluded. Subject to the provisions of the penultimate paragraph of Section 17. losses and damages caused by Tenant or any Tenant Party shall be repaired by Landlord, to the extent not covered by insurance, at Tenant’s sole cost and expense. Landlord reserves the right to stop Building Systems services when necessary # by reason of accident or emergency, or # for planned repairs, alterations or improvements, which are. in the judgment of Landlord, desirable or necessary to be made, until said repairs, alterations or improvements shall have been completed. Landlord shall have no responsibility or liability for failure to supply Building Systems services during any such period of interruption; provided, however, that Landlord shall, except in case of emergency, make a commercially reasonable effort to give Tenant 24 hours advance written notice of any planned stoppage of Building Systems services for routine maintenance, repairs, alterations or improvements. Tenant shall promptly give Landlord written notice of any repair required by Landlord pursuant to this Section 13 of which Tenant becomes aware, after which Landlord shall make a commercially reasonable effort to effect such repair. Landlord shall not be liable for any failure to make any repairs or to perform any maintenance unless such failure shall persist for an unreasonable time after Tenant’s written notice of the need for such repairs or maintenance. Tenant waives its rights under any state or local law to terminate this Lease or to make such repairs at Landlord’s expense and agrees that the parties’ respective rights with respect to such matters shall be solely as set forth herein. Repairs required as the result of fire, earthquake, flood, vandalism, war. or similar cause of damage or destruction shall be controlled by Section 18.

Landlord’s Repairs. Landlord shall, at Landlord’s sole expense (and not as an Operating Expense), be responsible for capital repairs and replacements of the roof (not including the roof membrane), exterior walls and foundation of the Building (“Structural Items”) unless the need for such repairs or replacements is caused by Tenant or any Tenant Parties, in which case Tenant shall bear the full cost to repair or replace such Structural Items. Landlord shall, as an Operating Expense, be responsible for the routine maintenance and repair of such Structural Items. Landlord, as an Operating

Landlord’s Repairs. Landlord, as an Operating Expense (except to the extent the cost thereof is excluded from Operating Expenses pursuant to Section 5 hereof), shall maintain all of the structural, exterior, parking and other Common Areas of the Project, including HVAC, plumbing, fire sprinklers, fire risers, elevators and all other building systems serving the Premises and other portions of the Project (“Building Systems”), all in good repair, reasonable wear and tear and uninsured losses and damages (except to the extent Landlord fails to maintain the insurance required to be maintained by Landlord pursuant to [Section 17] hereof and such losses or damages would have been insured losses or expenses under such insurance had Landlord not failed to maintain such insurance) caused by Tenant, or by any of Tenant’s assignees, sublessees, licensees, agents, servants, employees, invitees and contractors (or any of Tenant’s assignees, sublessees and/or licensees respective agents, servants, employees, invitees and contractors) (collectively, “Tenant Parties”) excluded. Subject to the provisions of the penultimate paragraph of [Section 17], losses and damages caused by Tenant or any Tenant Party shall be repaired by Landlord, to the extent not covered by insurance that Landlord is required to maintain pursuant to [Section 17], at Tenant’s sole cost and expense. Landlord reserves the right to stop Building Systems services when necessary # by reason of accident or emergency, or # for planned repairs, alterations or improvements, which are, in the judgment of Landlord, desirable or necessary to be made, until said repairs, alterations or improvements shall have been completed. Landlord shall have no responsibility or liability for failure to supply Building Systems services during any such period of interruption; provided, however, that Landlord shall, except in case of emergency, make a commercially reasonable effort to give Tenant 24 hours advance notice of any planned stoppage of Building Systems