Lease Modification Agreement No. 2, dated as of October 22, 2019, by and between the Registrant and Phoenix Limited Partnership of Raleigh

Effective as of the Expansion Space Commencement Date, Subsection 2.01(b) of the Lease (Square Feet Area) is amended to be “16,120”.

Base Rent. The Base Rent chart in Subsection 2.01(d) of the Lease is amended to be as follows: (see following page)

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Term. Subsection 2.01(g) (Term) is amended to add one year to the Term.

Expiration Date. Subsection 2.01(h) is amended to change the Expiration Date to August 31, 2023.

Existing Condition and Tenant Improvements. The condition of the Leased Premises as of the date of this Lease, as is and with all faults, shall be deemed the “Existing Condition”. All demolition of and improvements made to the Existing Condition of the Expansion Space in accordance with the Schematic Space Plan and Plans (both defined below) shall be deemed the “Tenant Improvements”.

Allowance. Landlord shall provide Tenant with a tenant improvement allowance in the amount not to exceed [***] (or [***] per Expansion Space square foot) (the “Allowance”), to pay for the costs and expenses incurred by Landlord for the design and construction of the Tenant Improvements. The costs and expenses shall include, but not be limited to, the costs and expenses of any (i) design and construction services related to architectural, plumbing, mechanical and electrical trades, (ii) demolition work, and (iii) construction administration services provided by Landlord’s architect and consulting engineers. Costs and expenses shall also include a construction management fee for Landlord of [***] of the total cost of the Tenant Improvements and all costs associated with any contractor’s general conditions, permits (including any new or changes to development, facility or transportation impact fees), taxes, insurance and fees.

Design. Landlord shall cause an architect and one or more engineers, each of whom shall be designated by Landlord in its sole discretion, to consult with Tenant and to prepare architectural, plumbing, mechanical and electrical plans that are (i) consistent with the “Schematic Space Plan” for the Expansion Space, which is attached hereto as Exhibit B-l, (ii) sufficiently detailed for pricing, approval and construction of the Tenant Improvements, and (iii) subject to Landlord’s approval, in its sole discretion (the “Detailed Plans”). All millwork, partitions, doors, hardware, ceiling tile, window coverings, plumbing, HVAC, lighting fixtures, switches, outlets and life safety items shall be designed in Landlord’s standard manner. Carpet and paint shall be selected and designed in Landlord’s standard manner and from Landlord’s standard finishes, unless otherwise agreed to by Landlord, in accordance with Section 4 herein. Landlord intends to reuse existing materials to the extent possible, including doors, frames, hardware, lights, ceiling tile and millwork. Tenant shall furnish to Landlord all other information and technical data reasonably necessary for the preparation of the Detailed Plans within five (5) days of Landlord’s request therefor, or as otherwise agreed to by Tenant and Landlord, so as not to delay the design, pricing, approval and construction of the Tenant Improvements by the Target Commencement Date. Tenant has authorized Amy Van Duyn (“Tenant’s Representative”) to represent Tenant for all purposes related to the design and construction of the Tenant Improvements, including approval of the Plans and any Change Orders (as defined below), and approval by Tenant’s Representative shall constitute approval by Tenant.

Approval of Plans and Cost. Landlord shall cause a general contractor or contractors designated by Landlord, at its sole discretion, to prepare detailed pricing of construction of the Tenant Improvements pursuant to the Detailed Plans. Landlord shall submit to Tenant for Tenant’s approval (i) the Detailed Plans and (ii) an itemized cost statement of all design and construction costs related to the Tenant Improvements (the “Cost Statement”). Within five (5) business days after its receipt of the Detailed Plans and Cost Statement, Tenant shall approve the Detailed Plans and the Cost Statement in writing, subject to any modifications or changes in the Detailed Plans requested by Tenant. Landlord, in its sole discretion, shall retain final approval rights for the Detailed Plans. After Tenant’s approval of the Detailed Plans and the Cost Statement, or in the event Tenant does not respond to Landlord within such five (5) business day period, the Detailed Plans and the Cost Statement shall be deemed to be approved by Tenant, and such approved Detailed Plans shall be thereafter deemed the “Plans”. Notwithstanding anything to the contrary contained herein, if the costs and expenses of the Tenant Improvements as

Change Orders and Additional Costs. After approval of the Cost Statement by Tenant, additional costs will likely be incurred by Landlord. These costs may include, without limitation, design costs that may not yet have been billed, design costs for selection of finishes, costs for construction clarifications and other construction administration by the architect or engineers, construction changes required by governmental inspectors, and changes to the Plans or actual construction initiated by Tenant. From time to time, Landlord shall update the previously approved Cost Statement to account for the subsequent changes in cost, and Tenant shall promptly pay any cost in excess of the Allowance and not previously paid by Tenant. For changes initiated by Tenant that will revise the previously approved Cost Statement or the construction schedule, a change order (“Change Order”) shall be prepared by Landlord, its architect, or general contractor. Each Change Order shall include information regarding any revisions to the cost and construction schedule, and shall provide sufficient information for evaluation by Landlord, its architect, and Tenant. Before the work detailed on the Change Order proceeds, Tenant’s Representative must approve the Change Order, including any change in cost and time. Tenant shall have [***] to approve each Change Order, unless Landlord grants Tenant more time. If Tenant does not approve the Change Order within the approval period, the Change Order shall be deemed disapproved by Tenant. If the Change Order is not approved or deemed disapproved, Landlord shall not proceed with the work contemplated in the Change Order. If the Change Order is approved and the additional cost exceeds [***], and if requested by Landlord, Tenant shall pay the cost of any such Change Order before Landlord proceeds with the work that is the subject of the Change Order.

Construction. After Tenant (i) approves the Detailed Plans and the Cost Statement, (or if Tenant does not respond to Landlord regarding the Detailed Plans and the Cost Statement, as set forth in Section 4 herein), and (ii) pays any and all costs in excess of the Allowance as set forth in Section 4 herein, then Landlord shall be entitled to cause, and shall cause, the general contractor designated by Landlord to construct the Tenant Improvements in accordance with the Plans and the Cost Statement.

Delay. The Commencement Date, Expiration Date, and commencement of installments of Monthly Base Rent shall not be postponed or delayed as a result of any of the following:

Tenant’s failure to furnish information or consult with Landlord or Landlord’s architects or engineers when requested in order to prepare the Detailed Plans;

Tenant’s failure to approve the Detailed Plans and/or Cost Statement or to pay any excess cost as provided in Sections 4 and 5 herein;

Tenant’s failure during construction to furnish information or consult with Landlord or Landlord’s architects, engineers or contractors when requested in order to complete construction;

Additional time necessary to consider changes, revise the Plans, obtain pricing, and/or prepare other documentation for a Change Order initiated by Tenant, whether or not such Change Order is approved by Tenant, and to construct approved Change Orders; or

Any other delay from any other cause attributable to Tenant, its agents, consultants, contractors, subcontractors or employees.

Tenant’s Access to Expansion Space. Landlord shall permit Tenant and its agents reasonable access to the Expansion Space during normal business hours prior to the Commencement Date for the purpose of installing telephone and computer cabling and equipment and fixtures. Tenant’s right to install equipment and fixtures does not include a general right to move personal property into the Expansion Space before the Expansion Space is inspected for purposes of obtaining a certificate of completeness. Therefore, the right to install equipment and fixtures only is granted to the extent the installation does not interfere or hinder Landlord’s ability to obtain a certificate of completeness for the Expansion Space. Tenant’s entry of the Expansion Space for installation shall not constitute acceptance of the Expansion Space nor Tenant’s acknowledgment of the Commencement Date of the Lease, unless Tenant commences the operation of any portion of its business therein. This right of entry onto the Expansion Space is a license from Landlord to Tenant and is subject to revocation in the event that Tenant or its employees, contractors or agents directly causes or is the cause of any code or governmental violation, labor dispute, delay or damage or otherwise becomes in default of any term, covenant or condition of this Lease as provided in Section 9.01. Prior to Tenant’s access, Tenant shall demonstrate to Landlord that it has obtained the insurance required and is in compliance with Section 8.04 of the Lease. Tenant’s early access shall be subject to the Section 8.05 of the Lease (Waiver of Subrogation) and Section 8.06 of the Lease (Indemnity/Waiver of Liability). Therefore, Tenant agrees to assume all risk of loss or damage to any telephone and computer cabling, equipment and fixtures installed pursuant to this provision and to indemnify and hold Landlord, its contractors, employees or agents harmless for any damage or injury indirectly or directly caused by Tenant’s entry.

Warranties. Landlord shall cause the repair or replacement of any defects in material or workmanship in the Tenant Improvements installed by Landlord for a period of one (1) year after the date of the certificate completion for the Expansion Space, or the duration of any manufacturer’s warranty, whichever is longer, provided Tenant notifies Landlord of such defect as soon as reasonably practicable after the date Tenant discovers such defect. LANDLORD MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IN CONNECTION WITH THE TENANT IMPROVEMENTS EXCEPT AS EXPRESSLY SET FORTH IN THIS SECTION 9. Tenant’s sole remedy for the breach of any applicable warranty shall be the remedy set forth in this Section 9. Tenant agrees that no other remedy, including without limitation, incidental or consequential damages for lost profits, injury to person or property or any other incidental or consequential loss, shall be available to Tenant.

Compliance with Certain Requirements. At any time before, during, and after construction, Landlord shall have the right to require changes to the Plans and construction in order to comply with applicable building codes, other governmental requirements, and insurance requirements. Neither Landlord’s nor Tenant’s approval of the Plans is a warranty that the Plans comply with applicable building codes, other governmental requirements, and insurance requirements.

Liability. The architects and engineers are responsible for completing the Plans in accordance with applicable, laws, rules and regulations, including the local building code, and in a manner that is consistent with Tenant’s intended use. The contractor is responsible for completing the Tenant Improvements in accordance with the Plans. The architects and engineers and contractor are responsible if the Tenant Improvements are not completed in accordance with applicable laws, rules and regulations or Tenant’s intended use.