Exterior Signage. Subject to this [Section 24.8.2], Tenant shall be entitled to install, at its sole cost and expense, exclusive signage on the Building and exterior of the Project (“Signage”). The graphics, materials, size, color, design, lettering, lighting (if any), specifications and exact location of the Signage (collectively, the “Signage Specifications”) shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed; provided that Tenant shall be entitled to a sign including its name, logo and trade dress in the maximize size permitted by applicable zoning codes. In addition, the Signage and all Signage Specifications therefore shall be subject to Tenant’s receipt of all required governmental permits and approvals, shall be subject to all applicable governmental laws and ordinances, and all covenants, conditions and restrictions affecting the Project. Tenant hereby acknowledges that, notwithstanding Landlord’s approval of the Signage and/or the Signage Specifications therefor, Landlord has made no representations or warranty to Tenant with respect to the probability of obtaining such approvals and permits. In the event Tenant does not receive the necessary permits and approvals for the Signage, Tenant’s and Landlord’s rights and obligations under the remaining provisions of this Lease shall not be affected. The cost of installation of the Signage, as well as all costs of design and construction of such Signage and all other costs associated with such Signage, including, without

Exterior Signage. Landlord and Tenant acknowledge and agree that Tenant shall be permitted to move, and have installed, at Tenant’s sole cost and expense, its exterior signage on the exterior of the Building to the new exterior signage area/space where Kala’s signage was previously located, provided # such exterior signage is in compliance with all Applicable Laws and is otherwise in compliance with the provisions of the Lease, including, without limitation [Section 9.05] of the Lease, and # Tenant shall obtain Landlord’s prior written consent therefore, which consent shall not. be unreasonably withheld, conditioned or delayed. Tenant shall, at Tenant’s sole cost and expense, promptly repair any damage to the Building caused by Tenant, Tenant’s architect, engineers, contractors or subcontractors (of any tier) during the moving and installation of Tenant’s exterior signage, including patching and painting the finishes of the Building where so damaged, all of which work shall be done to Landlord’s reasonable satisfaction. Tenant shall also be responsible for the cost of any alterations to the Building required as a result of Tenant’s moving and installation of Tenant’s exterior signage. Tenant shall indemnify and hold Landlord, its agents, and employees harmless from and against any and all costs, expenses, damages, losses, claims or liabilities, including, but not limited to, reasonable attorneys’ fees and costs, which arise out of, are occasioned by, or are in any way attributable to either # the design of any portion of Tenant’s exterior signage, or # the performance by Tenant or Tenant’s architect, engineers, contractors, or subcontractors (of any tier) of the moving and installation of Tenant’s exterior signage.

Exterior Signage. Subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense, may install # Building standard signage at the entrance to the Building, # internal directional, suite entry and lobby identification signage, and # one (1) exterior Building top sign reasonably approved by Landlord, subject to approval of the applicable governmental authority (collectively, "Tenant Signage"); provided, however, in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.2, of this Lease. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms and conditions of this Lease shall be unaffected.

Exterior Signage. With respect to any Building that Tenant leases in its entirety, but subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense (provided that the cost of installing Tenant Signage shall be deemed a Tenant Improvement Allowance Item under the Tenant Work Letter), may install # identification signage on the existing (or to be constructed) monument sign located at the Project entrance on Callan Road, and # on the exterior of the Building (collectively, "Tenant Signage"); provided, however, in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.3, of this Lease. All such signage shall be subject to Tenant's obtaining all required governmental approvals and any required approvals under the CC&Rs. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms and conditions of this Lease shall be unaffected. For so long as Tenant is in Full Occupancy of the Project, but subject to Section 23.3, below, Tenant shall have exclusive rights to exterior Building and monument signage at the Project.

Exterior Signage. Subject to the provisions of this Section 12.2, for so long as: # there is no Event of Default of Tenant, # the Lease is in full force and effect, and # Tenant, an Affiliated Entity and/or a Successor is then occupying at least fifty-one percent (51%) of the Premises (the “Signage Conditions”), then Tenant shall have the right to require Landlord to list, at Landlord’s initial cost and expense, Tenant’s name (“Tenant’s Monument Signage”) on the exterior monument sign serving the Property along New York Avenue. Such monument sign shall be a common monument (i.e. other tenant(s) in the Building may have identification signage installed on such monument). The right to the Tenant’s Monument Signage granted pursuant to this Section 12.2 is personal to Tenant, and may not be exercised by any occupant, subtenant, or other assignee of Tenant, other than an Affiliated Entity or Successor (the parties hereby agreeing that Tenant shall be responsible for the cost of any change in Tenant’s Monument Signage). The parties hereby agree that the maintenance and removal of such Tenant’s Monument Signage (including, without limitation, the repair and cleaning of the existing monument façade upon removal of Tenant’s Monument Signage) shall be performed at Landlord’s sole cost and expense, except that Tenant shall be responsible for the cost of any change in Tenant’s Monument Signage during the initial Term of the lease.

Exterior Signage. Subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense, may install identification signage at the exterior entrance to the Building, as well as internal directional, suite entry and lobby identification signage and directory (collectively, "Tenant Signage"); provided, however, in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.3, of this Lease. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms of this Lease shall be unaffected. If Landlord elects to install a multi-tenant identification sign at the entrance to the Project, Tenant shall be entitled to install its name on such sign (subject to availability on a pro-rata basis based on the relative square footages leased by the tenants of the Project), at Tenant's sole cost and expense.

Exterior Signage. Subject to the provisions of this Section 12.2(b), for so long as: # there is no Event of Default of Tenant, # the Lease is in full force and effect, and # Landlord has permitted another existing tenant of the Building to install one or more signs on the exterior façade of the Building (the “Exterior Signage Condition”), Tenant shall be entitled to install signage representing its proportionate share based on the rentable area of the Premises on the exterior façade of the Building, at Tenant’s sole cost and expense (“Tenant’s Exterior Signage”). Tenant’s Exterior Signage and the installation thereof shall be # subject to the approval by Landlord of the plans and specifications therefor, and # subject to and in accordance with all applicable Legal Requirements, including applicable zoning approvals. The right to the Tenant’s Exterior Signage granted pursuant to this Section 12.2(b) is personal to Tenant, and may not be exercised by any occupant, subtenant, or other assignee of Tenant, other than an Affiliated Entity or Successor (the parties hereby agreeing that Tenant shall be responsible for the cost of any change in Tenant’s Exterior Signage). The parties hereby agree that the maintenance and removal of such Tenant’s Exterior Signage (including, without limitation, the repair and cleaning of the existing Building façade upon removal of Tenant’s Exterior Signage) shall be performed by Landlord on behalf of Tenant, at Tenant’s sole cost and expense, and will be paid for by Tenant to Landlord based on the cost incurred by Landlord for such maintenance and removal, all due and payable within thirty (30) days after receipt of billing by Landlord.

Exterior Signage. Subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense, may install # identification signage on the monument sign outside the front entrance to the Building (which monument sign shall be installed by Landlord at its sole cost prior to the Rent Commencement Date), and # all exterior signage on the Building permitted by the City of South San Francisco, including on those elevations of the Building facing Highway 101 and Oyster Point Boulevard, so long as such signage is consistent with that certain Master Signage Program dated December 2012 and prepared by DES Architects + Engineers (collectively, "Tenant Signage"); provided, however, in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.3,. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms of this Lease shall be unaffected. Except as required by applicable law, Landlord shall not install any other signage on the Building. If Landlord elects to install a multi-tenant identification sign at the entrance to the Project, Tenant shall be entitled to install its name on such sign (subject to availability on a pro-rata basis based on the relative square footages leased by the tenants of the Project), at Tenant's sole cost and expense.

Exterior Signage. Subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense, may install # identification signage on the monument sign outside the front entrance to the Building (which monument Landlord shall install at its sole cost prior to the Lease Commencement Date) # Building entrance signage, internal directional and lobby identification signage, and # one (1) sign on the Building in a mutually reasonably approved location all in accordance with the Project master signage program (collectively, "Tenant Signage"); provided, however, # in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.3, of this Lease, and # if not already completed, Landlord shall consult with Tenant prior to finalizing the master signage program and consider in good faith Tenant's reasonable comments with respect thereto. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms of this Lease shall be unaffected. Except as required by applicable law, Landlord shall not install any other signage on the Building. If Landlord elects to install a multi- tenant identification sign at the entrance to the Project, Tenant shall be entitled to install its name on such sign (subject to availability on a pro-rata basis based on the relative square footages leased by the tenants of the Project), at Tenant's sole cost and expense.

Exterior Signage. Tenant, at its sole cost and expense, may install # its prorata share of identification signage on the existing monument sign located at the Project, and # at the entrance to the Building, and on the exterior of the Building (collectively, "Tenant Signage"); provided, however, in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in Section 23.2 of this Lease. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a good and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to