Approval of Budget for the Tenant Improvements. Notwithstanding anything to the contrary set forth elsewhere in this Work Letter or the Lease, Landlord shall not have any obligation to expend any portion of the TI Allowance until Landlord and Tenant shall have approved in writing the budget for the Tenant Improvements (the “Approved Budget”). Prior to Landlord’s approval of the Approved Budget, Tenant shall pay all of the costs and expenses incurred in connection with the Tenant Improvements as they become due. Landlord shall not be obligated to reimburse Tenant for costs or expenses relating to the Tenant Improvements that exceed the amount of the TI Allowance. Landlord shall not unreasonably withhold, condition or delay its approval of any budget for Tenant Improvements that is proposed by Tenant.

Approval of Budget for the Tenant Improvements. Notwithstanding anything to the contrary set forth elsewhere in this Work Letter or the Lease, Landlord shall not have any obligation to expend any portion of the TI Allowance until Landlord and Tenant shall have approved in writing the budget for the Tenant Improvements (the “Approved Budget”). Prior to

Construction Budget for Additional Premises Tenant Improvements. After approval of the Final Plans for each of the Third Floor West Wing Premises and the Sixth Floor East Wing Premises, as applicable, by Landlord and Tenant as provided above, Tenant shall prepare a detailed estimate of the Construction Costs for such Additional Premises Tenant Improvements (the “Construction Budget”). Tenant shall deliver a copy of the Construction Budget to Landlord for Landlord’s approval, which shall not be unreasonably withheld, conditioned or delayed.

Tenant Improvements. Subject to this Section 4, Tenant shall accept the Suite [[Unknown Identifier]] Premises and Suite [[Unknown Identifier]] Premises in their “as is” condition (subject to Landlord's continuing repair and maintenance obligations, as outlined in Section 10 of the Lease (as may be amended)), and Landlord shall have no obligation to make any alterations or improvements thereto whatsoever (provided that Landlord shall deliver same in good and tenantable condition, broom clean, with all systems serving same in good working order). Any alterations that Tenant desires to make in the Suite [[Unknown Identifier]] Premises and Suite [[Unknown Identifier]] Premises shall be subject to all the terms and conditions set forth in Section 11 of the Lease. Notwithstanding anything in the Lease to the contrary (and specifically deleting the references to the Improvements Allowances (as defined in Section 7 of the Fourth Amendment) for the DB First Floor Expansion Premises and the DB Second Floor Expansion Premises in Section 7 of the Fourth Amendment), Landlord hereby agrees to grant Tenant # an allowance in the amount of $217,480.45 (i.e. $29.33 per rentable square foot multiplied by 7,416 rentable square feet) (the “Suite [[Unknown Identifier]] Granted Allowance”) to be applied toward the cost (including architectural and engineering fees) of alterations performed by Tenant in the Suite [[Unknown Identifier]] Premises and # an allowance in the amount of $124,988.76 (the “Suite [[Unknown Identifier]] Granted Allowance”, together with the Suite [[Unknown Identifier]] Granted Allowance, collectively, the “Granted Allowance”) to be applied toward the cost of the design and construction of any alterations Tenant desires to perform in Suite [[Unknown Identifier]] Premises and Suite [[Unknown Identifier]] Premises, respectively, in conjunction with Tenant’s initial occupancy of Suite [[Unknown Identifier]] Premises and Suite [[Unknown Identifier]]. Any portion of the Granted Allowance may be applied to pay the fees of the architect and engineers and any construction supervision, contractors' overhead and profit charges, along with fees for any project manager employed by Tenant with respect to such alterations, as well as any licensing and permitting costs and fees; provided, the Suite [[Unknown Identifier]] Granted Allowance may only be used for the Suite [[Unknown Identifier]] Premises and the Suite [[Unknown Identifier]] Granted Allowance may only be used for the Suite [[Unknown Identifier]] Premises.

Tenant Improvements. Subject to this Section 4, Tenant shall accept the Suite 110 Premises in its “as is” condition (subject to Landlord's continuing repair and maintenance obligations, as outlined in Section 10 of the Lease (as may be amended)), and Landlord shall have no obligation to make any alterations or improvements thereto whatsoever (provided that Landlord shall deliver same in good and tenantable condition, broom clean, with all systems serving same in good working order). Any alterations that Tenant desires to make in the Suite 110 Premises shall be subject to all the terms and conditions set forth in Section 11 of the Lease. Notwithstanding anything in the Lease to the contrary, Landlord hereby agrees to grant Tenant an allowance in the amount of $10,000 to be applied toward the cost (including architectural and engineering fees) of alterations performed by Tenant in the Suite 110 Premises (the “Granted Allowance”) in conjunction with Tenant’s initial occupancy of Suite 110 Premises.

Tenant Improvements. The improvements to the Premises to be constructed by Tenant.

TENANT IMPROVEMENTS. [Section 2.1 of Exhibit 1.1].1-2 of the Lease is hereby amended and restated as follows:

Tenant Improvements. Except as specifically set forth herein or in the Tenant Work Letter attached to this Fourth Amendment as Exhibit B (the "Tenant Work Letter"), Landlord shall not be obligated to provide or pay for any improvement work or services related to the improvement of the Fourth Expansion Premises, and Tenant shall accept the Fourth Expansion Premises in its presently existing, "as-is" condition, provided that Landlord shall deliver the Fourth Expansion Premises to Tenant fully decommissioned in good, vacant, broom clean condition, and otherwise in the same condition as of the date of this Fourth Amendment, in compliance with all Applicable Laws (to the extent necessary to maintain a certificate of occupancy or its legal equivalent for the Fourth Expansion Premises), with the roof water-tight and shall cause the HVAC systems, plumbing, electrical systems, fire sprinkler system, lighting, emergency generators, and all other Building systems serving the Fourth Expansion Premises to be in good operating condition and repair and in compliance with Applicable Laws (to the extent necessary to obtain or maintain a certificate of occupancy, or its legal equivalent, for the Fourth Expansion Premises) as of the Fourth Expansion Commencement Date. Additionally, Tenant acknowledges that it shall continue to accept the Existing Premises in its presently existing "as-is" condition, and Landlord shall not be obligated to provide or pay for any improvement work related to the improvement of

Tenant Improvements. Tenant shall cause the Tenant Parties to construct, furnish or install all improvements, equipment or fixtures, that Tenant deems reasonably necessary for Tenant’s intended use of the Leased Premises, including laboratory, research and development, and manufacturing facilities, which shall include, without limitation, a new freight elevator (collectively, the “Tenant Improvements”). Tenant shall cause the Tenant Parties to complete construction of the Tenant Improvements for the entirety of the Leased Premises. Tenant shall also be responsible for the cost of any alterations to the Building to comply with applicable Laws to the extent solely required as a result of the Tenant Improvements; provided that Tenant shall not be responsible for any alterations required of Landlord under the Lease or this Work Letter. Tenant has engaged and Landlord has approved # Crew Universal as its consultant to manage the design and construction of the Tenant Improvements (“Tenant Improvement Project Manager”), and # DES Architects + Engineers as its architect for the Tenant Improvements (“Tenant Improvement Architect”). Tenant shall cause all drawings and specifications for the Tenant Improvements to be prepared by the Tenant Improvement Architect and to be constructed by GCI, Inc. or another general contractor licensed in California, selected by Tenant, and reasonably approved by Landlord (“Tenant Improvement Contractor”). Landlord’s prior written consent, which shall not be unreasonably withheld, conditioned or delayed, shall be required if Tenant desires to change its Tenant Improvement Architect, Tenant Improvement Contractor or Tenant Improvement Project Manager. Tenant shall furnish to Landlord a copy of the executed contracts between Tenant and Tenant Improvement Architect, and Tenant and Tenant Improvement Contractor, covering all of Tenant’s obligations under this Work Letter.

Tenant Improvements. Unless specified otherwise herein, Tenant shall bear and pay the cost of the Tenant Improvements,(which cost shall include, without limitation, the costs of construction as provided for in the Tenant Improvement Contractor’s contract, the cost of permits, all architectural, design, space planning, and engineering services obtained by Tenant in connection with Tenant Improvements, laboratory and office improvements, wiring and cabling costs, and cubicle costs and the construction supervision fee payable to Landlord in an amount equal to the lesser of # $150,000, and # 1.5% of the cost (excluding such fee) of the Tenant Improvements; provided that so long as Tenant is not in default under the Lease beyond all applicable notice and cure periods, Landlord shall contribute a maximum of $150 per rentable square foot, for an aggregate maximum of # $15,121,200 (the “Tenant Improvement Allowance”), which shall be utilized only building improvements to the Building, the Generator and for any related costs, including but not limited to design, engineering, construction, furniture and equipment appurtenant to the Leased Premises, cabling, project management fees, moving expenses, and signage, plus # the additional sum of $350,000 (the “Elevator Allowance”) to be used by Tenant to partially defray the cost of the freight elevator to be installed by Tenant. The Tenant Improvement Allowance shall be available to Tenant until the later of # December 1, 2022, as may be delayed by Force Majeure and Landlord Delays, and # the date that is thirty (30) months after the Lease Commencement Date (the “TI Allowance Deadline”), after which Tenant shall have no further right to request any unrequested portion of the Tenant Improvement Allowance. The Elevator Allowance shall be available to Tenant until December 31, 2026, as may be delayed by Force Majeure and Landlord Delays (the “Elevator Allowance Deadline”; together with the TI Allowance Deadline, each an “Allowance Deadline”), after which Tenant shall have no further right to request any unrequested portion of the Elevator Allowance. Landlord acknowledges that Tenant may complete pre-construction, construction and installation of the freight elevator in phases over the course of the Term of the Lease, and agrees to make payments (which may be in multiple draws) of the Elevator Allowance to Tenant in accordance with this Paragraph 3. Subject to the applicable Allowance Deadline, based upon applications for payment prepared, certified and submitted by Tenant as described below, Landlord shall make progress payments from the Tenant Improvement Allowance or Elevator Allowance to Tenant in accordance with the provisions of this Paragraph 3 as follows: