Sixth Amendment, dated as of July 12, 2024, to Lease by and between HCP LS Redwood City, LLC and Revolution Medicines, Inc

SIXTH AMENDMENT TO LEASE

This SIXTH AMENDMENT TO LEASE (“Sixth Amendment”) is made and entered into as of July 12, 2024 (the “Effective Date”), by and between HCP LS REDWOOD CITY, LLC, a Delaware limited liability company (“Landlord”), and REVOLUTION MEDICINES, INC., a Delaware corporation (“Tenant”).

r e c i t a l s :

A. Landlord and Tenant are parties to the Lease dated January 15, 2015 (the “Original Lease”), as amended by that certain First Amendment to Lease dated September 16, 2016 (the “First Amendment”), that certain Second Amendment to Lease dated April 17, 2020 (the “Second Amendment”), that certain Third Amendment to Lease dated November 1, 2021 (the “Third Amendment”), that certain Fourth Amendment to Lease dated March 24, 2023 (the “Fourth Amendment”), and that certain Fifth Amendment to Lease dated August 3, 2023 (the “Fifth Amendment”, and together with the Original Lease, the First Amendment, the Second Amendment, the Third Amendment, the Fourth Amendment, and the Fifth Amendment, the “Lease”), whereby Tenant leases approximately 142,811 RSF (“Existing Premises”) comprised of:

(i) that certain premises (the “700 Premises”) containing approximately 41,916 RSF consisting of the entire building (“700 Building”) located at 700 Saginaw Drive, Redwood City, CA,

(ii) that certain premises (the “300 Premises”) containing approximately 19,483 RSF consisting of the entire building (the “300 Building”) located at 300 Saginaw Drive, Redwood City, CA,

(iii) that certain premises (the “800 Premises”) containing approximately 41,445 RSF consisting of the entire building (“800 Building”) located at 800 Saginaw Drive, Redwood City, CA, and

(iv) that certain premises (the “900 Premises”) containing approximately 39,967 RSF consisting of the entire building (“900 Building”) located at 900 Saginaw Drive, Redwood City, CA.

B. Tenant desires to expand the Existing Premises to include that certain space consisting of approximately 43,293 RSF (the “Fourth Expansion Premises”) comprising all of the rentable area of the building located at 500 Saginaw Drive, Redwood City, CA (the “500 Building”), as delineated on Exhibit A attached hereto and made a part hereof, and to make other modifications to the Lease, and in connection therewith, Landlord and Tenant desire to amend the Lease as hereinafter provided. With the addition of the Fourth Expansion Premises, the total Premises will contain 186,104 RSF.

a g r e e m e n t :

NOW, THEREFORE, in consideration of the foregoing recitals and the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows:

Tenant shall pay the first month’s Base Rent due with respect to the Fourth Expansion Premises within 30 days of execution of this Sixth Amendment.

“Alternatively, upon the termination of Tenant’s lease of the portion of the Premises in one or the other of the 700 Building, the 300 Building, the 800 Building, the 900 Building, or the 500 Building under any of the provisions of this Article 11, the parties shall be released with respect to the provisions of the Lease which are applicable to the terminated portion of the Premises without further obligation to the other from the date possession of the terminated portion of the Premises is surrendered to Landlord, except for items which have theretofore accrued and are then unpaid.”

"The term “Bank” as used herein shall mean a money-center, solvent and nationally recognized bank listed on the most current list of Global Systemically Important Banks (G-SIBs) as of the Effective Date, and otherwise acceptable to Landlord in its reasonable discretion, and that (i) accepts deposits, maintains accounts, has a local San Francisco office which will accept draws on a letter of credit or allows draws by facsimile or electronically, and whose deposits are insured by the FDIC, (ii) is not subject to the control or jurisdiction of any receiver, trustee, custodian, conservator, liquidator or similar official under any federal, state, foreign, or common law; (iii) is not a “bridge bank” or other successor (whether by asset sale, merger, or otherwise) to any bank that was the original issuer of the L-C, or any entity that is under the control of the Federal Deposit Insurance Corporation as receiver or conservator, unless expressly approved in writing by Landlord in its sole and absolute discretion; and (iv) whose long-term, unsecured and unsubordinated debt obligations are rated of no less than “A” by Fitch Ratings Ltd. (“Fitch”) and a short term issuer rating of no less than “F1” by Fitch (or in the event such applicable Fitch ratings are no longer available, comparable ratings from Standard and Poor's Professional Rating Service or Moody's Professional Rating Service), unless

otherwise expressly approved in writing by Landlord in its sole and absolute discretion (collectively, the “L-C Issuer Requirements”).”

Landlord acknowledges that as of the Effective Date, JP Morgan is an acceptable Bank.

IN WITNESS WHEREOF, this Sixth Amendment has been executed as of the day and year first above written.

EXHIBIT A

OUTLINE OF FOURTH EXPANSION PREMISES

EXHIBIT B

TENANT WORK LETTER

This Tenant Work Letter shall set forth the terms and conditions relating to the initial improvement of the Fourth Expansion Premises for Tenant following the date of this Sixth Amendment. This Tenant Work Letter is essentially organized chronologically and addresses the issues of construction, in sequence, as such issues will arise during construction in the Premises.

SECTION 1

POSSESSION OF THE PREMISES

Tenant acknowledges that Tenant has thoroughly examined the Fourth Expansion Premises. On the Effective Date, Landlord shall tender possession of the Premises to Tenant in its presently existing, “as-is” condition, subject to Section 6 of the Sixth Amendment. Except for the payment of the Tenant Improvement Allowance as provided in Section 2, below, Landlord shall have no obligation to make or pay for any improvements to the Fourth Expansion Premises.

SECTION 2

TENANT IMPROVEMENTS

2.1 Tenant Improvement Allowance. Commencing as of the Effective Date, Tenant shall be entitled to a one-time tenant improvement allowance for the Fourth Expansion Premises in the amount of $4,329,300.00 (i.e., $100.00 per RSF of the Fourth Expansion Premises) (the “Tenant Improvement Allowance”), for the costs relating to the initial design and construction of Tenant’s improvements, which are permanently affixed to the Premises or which are “Tenant Improvement Allowance Items,” as that term is defined in Section 2.2.1, below (collectively, the “Tenant Improvements”). In no event shall Landlord be obligated to make disbursements pursuant to this Tenant Work Letter or otherwise in connection with Tenant’s construction of the Tenant Improvements or any Tenant Improvement Allowance Items, as defined below, in a total amount which exceeds the sum of the Tenant Improvement Allowance. All Tenant Improvements for which the Tenant Improvement Allowance has been made available shall be deemed Landlord’s property under the terms of the Lease; provided, however, Landlord may, by written notice to Tenant given concurrently with Landlord’s approval of the “Final Working Drawings”, as that term is defined in Section 3.3, below, require Tenant, prior to the end of the Lease Term, or given following any earlier termination of this Lease, at Tenant’s expense, to remove any Tenant Improvements and to repair any damage to the Fourth Expansion Premises and Building caused by such removal and return the affected portion of the Fourth Expansion Premises to a Building standard general office condition. Landlord hereby approves the DGA space plan attached hereto as Schedule 1 (“DGA Plan”). So long as the Final Space Plan, Final Working Drawings and corresponding Tenant Improvements are consistent with and a logical extension of the DGA Plan, Landlord shall not require Tenant, whether at the end of the Lease Term, or following any earlier termination of the Lease, to pay for or remove any Tenant Improvements set forth on the Final Working Drawings, to repair any damage to the Premises and Building caused by such removal, or to return the affected portion of the Premises to the condition in existence prior to the construction of the Tenant Improvements. Any portion of the Tenant Improvement Allowance that

is not disbursed or allocated for disbursement by date that twelve (12) months after the Fourth Expansion Commencement Date (subject to delays caused by Landlord), shall revert to Landlord and Tenant shall have no further rights with respect thereto.

2.2 Disbursement of the Tenant Improvement Allowance.

2.2.1 Tenant Improvement Allowance Items. Except as otherwise set forth in this Tenant Work Letter, the Tenant Improvement Allowance shall be disbursed by Landlord only for the following items and costs (collectively the “Tenant Improvement Allowance Items”):

2.2.1.1 Payment of all reasonable fees of the “Architect” and the “Engineers,” as those terms are defined in Section 3.1 of this Tenant Work Letter, project management fees, and payment of the fees incurred by, and the cost of documents and materials supplied by, Landlord and Landlord’s consultants in connection with the preparation and review of the “Construction Drawings,” as that term is defined in Section 3.2 of this Tenant Work Letter;

2.2.1.2 The payment of plan check, permit and license fees relating to construction of the Tenant Improvements;

2.2.1.3 The payment for all demolition and removal of existing improvements in the Fourth Expansion Premises;

2.2.1.4 The cost of construction of the Tenant Improvements, including, without limitation, testing and inspection costs, costs incurred for removal of existing furniture, fixtures or equipment in the Fourth Expansion Premises, hoisting and trash removal costs, costs to purchase and install in the Fourth Expansion Premises equipment customarily incorporated into laboratory improvements or laboratory utility systems, including, without limitation, UPS, DI Systems, boilers, air compressors, glass/cage washers and autoclaves, painting, and contractors’ fees and general conditions (but not including any other unattached furniture, laboratory equipment, or office equipment (“FF&E”), the costs of which FF&E shall not be paid for by the Tenant Improvement Allowance);

2.2.1.5 The cost of any changes in the Base Building when such changes are required by the Construction Drawings (including if such changes are due to the fact that such work is prepared on an unoccupied basis), such cost to include all direct architectural and/or engineering fees and expenses incurred in connection therewith;

2.2.1.6 The cost of any changes to the Construction Drawings or Tenant Improvements required by all applicable building codes (the “Code”);

2.2.1.7 Sales and use taxes;

2.2.1.8 Subject to Section 2.2, above, all other actual out-of-pocket costs expended by Landlord in connection with the construction of the Tenant Improvements, including, without limitation, costs expended by Landlord pursuant to Section 4.1.1 of this Tenant Work Letter, below.

2.2.2 Disbursement of Tenant Improvement Allowance. During the construction of the Tenant Improvements, Landlord shall make monthly disbursements of the Tenant Improvement Allowance for Tenant Improvement Allowance Items for the benefit of Tenant and shall authorize the release of monies for the benefit of Tenant as follows.

2.2.2.1 Monthly Disbursements. On or before the fifth (5th) day of each calendar month, during the design and construction of the Tenant Improvements (or such other date as Landlord may designate), Tenant shall deliver to Landlord: (i) a request for reimbursement of amounts paid to the “Contractor,” as that term is defined in Section 4.1.1 of this Tenant Work Letter, approved by Tenant, in a form to be provided by Landlord, showing the schedule, by trade, of percentage of completion of the Tenant Improvements in the Fourth Expansion Premises, detailing the portion of the work completed and the portion not completed; (ii) invoices from all of “Tenant’s Agents,” as that term is defined in Section 4.1.2 of this Tenant Work Letter, for labor rendered and materials for the Fourth Expansion Premises; (iii) executed mechanic’s lien releases, as applicable, from all of Tenant’s Agents which shall comply with the appropriate provisions, as reasonably determined by Landlord, of California Civil Code Sections 8132, 8134, 8136 and 8138; and (iv) all other information reasonably requested by Landlord. Tenant’s request for payment shall be deemed Tenant’s acceptance and approval of the work furnished and/or the materials supplied as set forth in Tenant’s payment request. Within forty-five (45) days thereafter, and provided that Tenant has paid the “Tenant Contribution” as provided in Section 4.2.1, below, Landlord shall deliver a check to Tenant made payable to Tenant, or, if so directed by Tenant, to the Contractor, in payment of the lesser of: (A) the amounts so requested by Tenant as set forth in this Section 2.2.3.1, above (less the Tenant Contribution, if applicable), less a ten percent (10%) retention to be retained unless Landmark Builders is the Contractor (the aggregate amount of such retentions to be known as the “Final Retention”), and (B) the balance of any remaining available portion of the Tenant Improvement Allowance if applicable (not including the Final Retention, provided that Landlord does not dispute any request for payment based on non-compliance of any work with the “Approved Working Drawings,” as that term is defined in Section 3.5 below, or due to any substandard work. Landlord’s payment of such amounts shall not be deemed Landlord’s approval or acceptance of the work furnished or materials supplied as set forth in Tenant’s payment request.

2.2.2.2 Final Deliveries. Following the completion of construction of the Tenant Improvements, Tenant shall deliver to Landlord (i) properly executed final mechanic’s lien releases in compliance with both California Civil Code Section 8134 and either Section 8136 or Section 8138 from all of Tenant’s Agents, and a certificate certifying that the construction of the Tenant Improvements in the Fourth Expansion Premises has been substantially completed, and (ii) a “close-out package” in such customary format designated by Landlord (e.g., paper and/or electronic files) containing, without limitation, the following items (to the extent deemed necessary by Landlord): (a) as-built drawings and final record CAD drawings, (b) warranties and guarantees from all contractors, subcontractors and material suppliers, (c) all permits, approvals and other documents issued by any governmental agency in connection with the Tenant Improvements, (d) an independent air balance report, if required due to the nature of the Tenant Improvements, and (e) such other information or materials as may be reasonably requested by Landlord. Tenant shall record a valid Notice of Completion in accordance with the requirements of Section 4.3 of this Tenant Work Letter.

2.2.2.3 Other Terms. Landlord shall only be obligated to make disbursements from the Tenant Improvement Allowance to the extent costs are incurred by Tenant for Tenant Improvement Allowance Items. All Tenant Improvement Allowance Items for which the Tenant Improvement Allowance have been made available shall be deemed Landlord’s property under the terms of this Lease.

2.4 Building Standards. The quality of Tenant Improvements shall be in keeping with the existing improvements in the Fourth Expansion Premises.

SECTION 3

CONSTRUCTION DRAWINGS

3.1 Selection of Architect. Tenant shall retain an architect/space planner (the “Architect”) approved in advance by Landlord (which approval shall not be unreasonably withheld) to prepare the Final Space Plan and Final Working Drawings as provided in Section 3.2 and 3.3, below. Tenant shall retain the engineering consultants or design/build subcontractors designated by Tenant and reasonably approved in advance by Landlord (the “Engineers”) to prepare all plans and engineering working drawings relating to the structural, mechanical, electrical, plumbing, HVAC, lifesafety, and sprinkler work in the Fourth Expansion Premises, which work is not part of the Base Building. All such plans and drawings shall comply with the drawing format and specifications reasonably determined by Landlord, and shall be subject to Landlord’s reasonable approval. Tenant and Architect shall verify, in the field, the dimensions and conditions as shown on the relevant portions of the Base Building plans, and Tenant and Architect shall be solely responsible for the same, and Landlord shall have no responsibility in connection therewith. Landlord’s review of any plans or drawings as set forth in this Section 3, shall be for its sole purpose and shall not imply Landlord’s review of the same, or obligate Landlord to review the same, for quality, design, Code compliance or other like matters.

3.2 Final Space Plan. Tenant shall supply Landlord with pdf copies of its final space plan for the Fourth Expansion Premises, digitally signed or acknowledged by Tenant, before any architectural working drawings or engineering drawings have been commenced. The final space plan (the “Final Space Plan”) shall include a layout and designation of all offices, labs, rooms and other partitioning, their intended use, and equipment to be contained therein. Landlord may request clarification or more specific drawings for special use items not included in the Final Space Plan. Landlord shall advise Tenant within five (5) business days after Landlord’s receipt of the Final Space Plan for the Fourth Expansion Premises if the same is unsatisfactory or incomplete in any respect. If Tenant is so advised, Tenant shall promptly cause the Final Space Plan to be revised to correct any deficiencies or other matters Landlord may reasonably require. If Landlord fails to respond to the Final Space Plan within the five (5) business day period set forth above, Tenant may send Landlord a reminder notice setting forth such failure containing the following sentence at the top of such notice in bold, capitalized font at least twelve (12) points in size: “LANDLORD’S FAILURE TO RESPOND TO THIS NOTICE WITHIN THREE (3) BUSINESS DAYS SHALL RESULT IN LANDLORD’S DEEMED APPROVAL OF TENANT’S FINAL SPACE PLAN” (the "Final Space Plan Reminder Notice"). Any such Final Space Plan Reminder Notice shall include a complete copy of the Final Space Plan. If Landlord fails to respond within three (3) business days after receipt of a Final Space Plan Reminder Notice, then the Final Space Plan shall be deemed approved by Landlord.

3.3 Final Working Drawings. After the Final Space Plan has been approved by Landlord, Tenant shall supply the Engineers with a complete listing of standard and non-standard equipment and specifications, including, without limitation, Title 24 calculations, electrical requirements and special electrical receptacle requirements for the Fourth Expansion Premises, to enable the Engineers and the Architect to complete the “Final Working Drawings” (as that term is defined below) in the manner as set forth below. Upon the approval of the Final Space Plan by Landlord and Tenant, Tenant shall promptly cause the Architect and the Engineers to complete the architectural and engineering drawings for the Fourth Expansion Premises, and Architect shall compile a fully coordinated set of architectural, structural, mechanical, electrical and plumbing working drawings in a form which is sufficiently complete to allow all of Tenant’s Agents to bid on the work and to obtain all applicable permits (collectively, the “Final Working Drawings”) and shall submit the same to Landlord for Landlord’s approval, which shall not be unreasonably withheld, conditioned, or delayed. Tenant shall supply Landlord with CAD and pdf copies of such Final Working Drawings, digitally signed or acknowledged by Tenant. Landlord shall advise Tenant within ten (10) business days after Landlord’s receipt of the Final Working Drawings for the Fourth Expansion Premises if the same is unsatisfactory or incomplete in any respect. If Tenant is so advised, Tenant shall promptly cause the Final Working Drawings to be revised in accordance with such review and any disapproval of Landlord in connection therewith. If Landlord fails to respond to the Final Working Drawings within the ten (10) business day period set forth above, Tenant may send Landlord a reminder notice setting forth such failure containing the following sentence at the top of such notice in bold, capitalized font at least twelve (12) points in size: “LANDLORD’S FAILURE TO RESPOND TO THIS NOTICE WITHIN FIVE (5) BUSINESS DAYS SHALL RESULT IN LANDLORD’S DEEMED APPROVAL OF TENANT’S FINAL WORKING DRAWINGS” (the "Final Working Drawings Reminder Notice"). Any such Final Working Drawings Reminder Notice shall include a complete copy of the Final Working Drawings. If Landlord fails to respond within five (5) business days after receipt of a Final Working Drawings Reminder Notice, then the Final Working Drawings shall be deemed approved by Landlord.

3.4 Approved Working Drawings. The Final Working Drawings shall be approved by Landlord (the “Approved Working Drawings”) prior to the commencement of construction of the Fourth Expansion Premises by Tenant. Concurrently with Tenant’s delivery of the Final Working Drawings to Landlord for Landlord’s approval, Tenant may submit the same to the appropriate municipal authorities for all applicable building permits. Tenant hereby agrees that neither Landlord nor Landlord’s consultants shall be responsible for obtaining any building permit or certificate of occupancy for the Fourth Expansion Premises and that obtaining the same shall be Tenant’s responsibility; provided, however, that Landlord shall cooperate with Tenant in executing permit applications and performing other ministerial acts reasonably necessary to enable Tenant to obtain any such permit or certificate of occupancy. No changes, modifications or alterations in the Approved Working Drawings may be made without the prior written consent of Landlord, which shall not be unreasonably withheld, conditioned, or delayed.

3.5 Change Orders. If Tenant at any time desires any changes, alterations or additions to the Approved Working Drawings, Tenant shall submit a detailed written request to Landlord and PMA (as defined in Section 4.1.1 below) specifying such changes, alterations or additions (a “Tenant Change Request”), for Landlord’s approval. Landlord shall advise Tenant within three (3) business days after Landlord’s receipt of a Tenant Change Request if the same is unsatisfactory or incomplete in any respect. If Tenant is so advised, Tenant shall promptly cause the Tenant

Change Request to be revised to correct any deficiencies or other matters Landlord may reasonably require. If Landlord fails to respond to the Tenant Change Request within the three (3) business day period set forth above, Tenant may send Landlord a reminder notice setting forth such failure containing the following sentence at the top of such notice in bold, capitalized font at least twelve (12) points in size: “LANDLORD’S FAILURE TO RESPOND TO THIS NOTICE WITHIN THREE (3) BUSINESS DAYS SHALL RESULT IN LANDLORD’S DEEMED APPROVAL OF A TENANT CHANGE REQUEST” (the “Change Request Reminder Notice”). Any such Change Request Reminder Notice shall include a complete copy of the applicable Tenant Change Request. If Landlord fails to respond within three (3) business days after receipt of a Change Request Reminder Notice, then the applicable Change Request shall be deemed approved by Landlord.

SECTION 4

CONSTRUCTION OF THE TENANT IMPROVEMENTS

4.1 Tenant’s Selection of Contractors.

4.1.1 The Contractor; Landlord’s Project Manager. Tenant shall retain a licensed general contractor, approved in advance by Landlord, to construct the Tenant Improvements (“Contractor”). Landlord’s approval of the Contractor shall not be unreasonably withheld. Landlord approves Landmark Builders as a Contractor. Landlord shall retain Project Management Advisors, Inc. (“PMA”) as a third party project manager for construction oversight of the Tenant Improvements on behalf of Landlord, and Tenant shall pay a fee to Landlord with respect to the PMA services equal to $1.89 per rentable square foot of the Fourth Expansion Premises, which amount shall be deducted from the Tenant Improvement Allowance as incurred.

4.1.2 Tenant’s Agents. All subcontractors, laborers, materialmen, and suppliers used by Tenant (such subcontractors, laborers, materialmen, and suppliers, and the Contractor to be known collectively as “Tenant’s Agents”). The subcontractors used by Tenant, but not any laborers, materialmen, and suppliers, must be approved in writing by Landlord, which approval shall not be unreasonably withheld, conditioned, or delayed; provided, however, Landlord may nevertheless designate and require the use of particular mechanical, engineering, plumbing, fire life-safety and other Base Building subcontractors. If Landlord does not approve any of Tenant’s proposed subcontractors, Tenant shall submit other proposed subcontractors for Landlord’s written approval.

4.2 Construction of Tenant Improvements by Tenant’s Agents.

4.2.1 Construction Contract; Cost Budget.

Tenant shall engage the Contractor under a commercially reasonable and customary construction contract, reasonably approved by Landlord (collectively, the “Contract”). Prior to the commencement of the construction of the Tenant Improvements, and after Tenant has accepted all bids for the Tenant Improvements, Tenant shall provide Landlord with a detailed breakdown, by trade, of the final costs to be incurred or which have been incurred, as set forth more particularly in Sections 2.2.1.1 through 2.2.1.10, above, in connection with the design and construction of the Tenant Improvements to be performed by or at the direction of Tenant or the Contractor, which costs form a basis for the estimated total costs of the work of the Tenant Improvement project (the “Final Budget”). If the Final Budget exceeds the amount of the Tenant Improvement Allowance (less any portion thereof already disbursed by Landlord, or in the process of being disbursed by

Landlord, on or before the commencement of construction of the Tenant Improvements)(the “Over-Allowance Amount”), then Tenant shall pay a percentage of each amount requested to be paid to the Contractor or otherwise disbursed under this Tenant Work Letter (the “Tenant Contribution”), which percentage shall be equal to the amount of the Over-Allowance Amount divided by the amount of the Final Costs, and such payment by Tenant shall be a condition to Landlord’s obligation to pay any amounts of the Tenant Improvement Allowance. In the event that the costs relating to the design and construction of the Tenant Improvements shall be in excess of the estimated amount as set forth in the Final Costs, any such excess shall be paid by Tenant out of its own funds, but Tenant shall continue to provide Landlord with the documents described in Sections 2.2.2.1 (i), (ii), (iii) and (iv) of this Tenant Work Letter, above, for Landlord’s approval, prior to Tenant paying such costs.

4.2.2 Tenant’s Agents.

4.2.2.1 Compliance with Drawings and Schedule. Tenant’s and Tenant’s Agent’s construction of the Tenant Improvements shall comply with the following: (i) the Tenant Improvements shall be constructed in strict accordance with the Approved Working Drawings; and (ii) Tenant’s Agents shall submit schedules of all work relating to the Tenant’s Improvements to Contractor and Contractor shall, within five (5) business days of receipt thereof, inform Tenant’s Agents of any changes which are necessary thereto, and Tenant’s Agents shall adhere to such corrected schedule.

4.2.2.2 Indemnity. Tenant’s indemnity of Landlord as set forth in this Lease shall also apply with respect to any and all costs, losses, damages, injuries and liabilities related in any way to any act or omission of Tenant or Tenant’s Agents, or anyone directly or indirectly employed by any of them, or in connection with Tenant’s non-payment of any amount arising out of the Tenant Improvements and/or Tenant’s disapproval of all or any portion of any request for payment. Such indemnity by Tenant, as set forth in this Lease, shall also apply with respect to any and all costs, losses, damages, injuries and liabilities related in any way to Landlord’s performance of any ministerial acts reasonably necessary (i) to permit Tenant to complete the Tenant Improvements, and (ii) to enable Tenant to obtain any building permit or certificate of occupancy for the Fourth Expansion Premises. The foregoing indemnity shall not apply to claims caused by the gross negligence or willful misconduct of Landlord, its member partners, shareholders, officers, directors, agents, employees, and/or contractors.

4.2.2.2 Requirements of Tenant’s Agents. Each of Tenant’s Agents shall guarantee to Tenant and for the benefit of Landlord that the portion of the Tenant Improvements for which it is responsible shall be free from any defects in workmanship and materials for a period of not less than one (1) year from the date of substantial completion of the work under the Contract (“Substantial Completion”). Each of Tenant’s Agents shall be responsible for the replacement or repair, without additional charge, of all work done or furnished in accordance with its contract that shall become defective within one (1) year after Substantial Completion. The correction of such work shall include, without additional charge, all additional expenses and damages incurred in connection with such removal or replacement of all or any part of the Tenant Improvements, and/or the Building and/or common areas that may be damaged or disturbed thereby. All such warranties or guarantees as to materials or workmanship of or with respect to the Tenant Improvements shall be contained in the Contract or subcontract and shall be written such that such guarantees or warranties shall inure to the benefit of both Landlord and Tenant, as their respective interests may appear, and can be directly enforced by either. Tenant covenants to give to Landlord

any assignment or other assurances which may be necessary to effect such right of direct enforcement.

4.2.2.3 Insurance Requirements.

4.2.2.3.1 General Coverages. All of Tenant’s Agents shall carry the following insurance with insurers having a minimum A.M. best rating of A- VIII or better (i) worker’s compensation insurance covering all of Tenant’s Agents’ respective employees with a waiver of subrogation in favor of Landlord and the property manager, (ii) general liability insurance with a limit of not less than $1,000,000 per occurrence and $2,000,000 general aggregate, including products/completed operations and contractual coverage, and shall name Landlord, its subsidiaries and affiliates, its property manager (if any) and any other party the Landlord so specifies, as an additional insured or loss payee, as applicable, including Landlord’s managing agent, if any, and (iii) if the cost of such Tenant Improvements exceeds $100,000 in the aggregate, then Builders Risk insurance covering the construction of the Tenant Improvements, and such policy shall include Landlord as an additional insured.

4.2.2.3.2 General Terms. Certificates for all insurance carried pursuant to this Section 4.2.2.3 shall be delivered to Landlord before the commencement of construction of the Expansion Tenant Improvements and before the Contractor’s equipment is moved onto the site. All such policies of insurance must contain a provision that the company writing said policy will endeavor to give Landlord thirty (30) days prior written notice of any cancellation or lapse of the effective date or any reduction in the amounts of such insurance. In the event that the Expansion Tenant Improvements are damaged by any cause during the course of the construction thereof, Tenant shall immediately repair the same at Tenant’s sole cost and expense. Tenant’s Agents shall maintain all of the foregoing insurance coverage in force until the Expansion Tenant Improvements are fully completed, except for any Products and Completed Operation Coverage insurance required by Landlord, which is to be maintained for ten (10) years following completion of the work. Such insurance shall provide that it is primary insurance as respects the owner and that any other insurance maintained by owner is excess and noncontributing with the insurance required hereunder. The requirements for the foregoing insurance shall not derogate from the provisions for indemnification of Landlord by Tenant under Section 4.2.2.2 of this Tenant Work Letter.

4.2.2 Governmental Compliance. The Tenant Improvements shall comply in all respects with the following: (i) all state, federal, city or quasi-governmental laws, codes, ordinances and regulations, as each may apply according to the rulings of the controlling public official, agent or other person; (ii) applicable standards of the American Insurance Association (formerly, the National Board of Fire Underwriters) and the National Electrical Code; and (iii) building material manufacturer’s specifications.

4.2.4 Inspection by Landlord. Landlord shall have the right to inspect the Tenant Improvements at all times, provided however, that Landlord’s failure to inspect the Tenant Improvements shall in no event constitute a waiver of any of Landlord’s rights hereunder nor shall Landlord’s inspection of the Tenant Improvements constitute Landlord’s approval of the same. Should Landlord reasonably disapprove any portion of the Tenant Improvements, on the grounds that the construction is defective or fails to comply with the Approved Working Drawings, Landlord shall notify Tenant in writing of such disapproval and shall specify the items disapproved. Any such defects or deviations shall be rectified by Tenant at no expense to Landlord, provided however, that in the event Landlord determines that a defect or deviation exists that might adversely affect the mechanical, electrical, plumbing, heating, ventilating and air conditioning or life-safety systems of the Building, the structure or exterior appearance of the Building or any other tenant’s use of such other tenant’s leased premises, Landlord may, take such action as Landlord reasonably deems necessary, at Tenant’s expense and without incurring any liability on Landlord’s part, to correct any such defect, deviation and/or matter, including, without limitation, causing the cessation of performance of the construction of the Tenant Improvements until such time as the defect, deviation and/or matter is corrected to Landlord’s reasonable satisfaction.

4.2.5 Meetings. Commencing upon the execution of this Lease, Tenant shall hold weekly meetings at a reasonable time, with the Architect and the Contractor regarding the progress of the preparation of Construction Drawings and the construction of the Tenant Improvements, and Landlord and/or its agents shall receive prior notice of, and shall have the right to attend, all such meetings, and, upon Landlord’s request, certain of Tenant’s Agents shall attend such meetings. In addition, minutes shall be taken at all such meetings, a copy of which minutes shall be promptly delivered to Landlord. One such meeting each month shall include the review of Contractor’s current request for payment.

4.3 Notice of Completion; Copy of Record Set of Plans. Within ten (10) days after completion of construction of the Tenant Improvements, Tenant shall cause a valid Notice of Completion to be recorded in the office of the Recorder of the county in which the Building is located in accordance with Section 8182 of the Civil Code of the State of California or any successor statute, and shall furnish a copy thereof to Landlord upon such recordation. If Tenant fails to do so, Landlord may execute and file the same on behalf of Tenant as Tenant’s agent for such purpose, at Tenant’s sole cost and expense. At the conclusion of construction, (i) Tenant shall cause the Architect and Contractor (w) to update the Approved Working Drawings as necessary to reflect all changes made to the Approved Working Drawings during the course of construction, (x) to certify to the best of their knowledge that the “record-set” of as-built drawings are true and correct, which certification shall survive the expiration or termination of this Lease, (y) to deliver to Landlord two (2) sets of copies of such record set of drawings (consisting of the applicable CAD files) within ninety (90) days following issuance of a certificate of occupancy for the Fourth Expansion Premises, and (z) deliver to Landlord a permit card with all required final signoffs from the applicable governmental agencies, and (ii) Tenant shall deliver to Landlord a copy of all warranties, guaranties, and operating manuals and information relating to the improvements, equipment, and systems in the Fourth Expansion Premises. Within fifteen (15) days after request by Tenant following the Substantial Completion of the Tenant Improvements, Landlord will acknowledge its approval of the Tenant Improvements (provided that such approval has been granted) by placing its signature on a Contractor’s Certificate of Substantial Completion fully executed by the Architect, Contractor and Tenant. Landlord’s approval shall not create any

contingent liabilities for Landlord with respect to any latent quality, design, Code compliance or other like matters that may arise subsequent to Landlord’s approval.

SECTION 5

MISCELLANEOUS

5.1 Tenant’s Representative. Tenant has designated Camilo Pascua ***@***) as its sole representatives with respect to the matters set forth in this Tenant Work Letter, who shall each have full authority and responsibility to act on behalf of the Tenant as required in this Tenant Work Letter.

5.2 Landlord’s Representative. Landlord has designated Bernie Baker ***@***) with PMA, as its sole representative with respect to the matters set forth in this Tenant Work Letter, who, until further notice to Tenant, shall have full authority and responsibility to act on behalf of the Landlord as required in this Tenant Work Letter.

5.3 Time is of the Essence in This Tenant Work Letter. Unless otherwise indicated, all references herein to a “number of days” shall mean and refer to calendar days. If any item requiring approval is timely disapproved by Landlord, the procedure for preparation of the document and approval thereof shall be repeated until the document is approved by Landlord.

5.4 Tenant’s Lease Default. Notwithstanding any provision to the contrary contained in the Lease or this Tenant Work Letter, upon any Event of Default by Tenant under the Lease or this Tenant Work Letter (including, without limitation, any failure by Tenant to fund any portion of the Over-Allowance Amount) occurs at any time on or before the substantial completion of the Tenant Improvements and such default remains uncured ten (10) days following Landlord’s notice of such default to Tenant, then in addition to all other rights and remedies granted to Landlord pursuant to the Lease, Landlord shall have the right to withhold payment of all or any portion of the Tenant Improvement Allowance and/or Landlord may, without any liability whatsoever, cause the cessation of construction of the Tenant Improvements and cessation of any work required to be performed by Landlord pursuant to this Tenant Work Letter (in which case, Tenant shall be responsible for any delay and any costs occasioned thereby).

SCHEDULE 1 TO EXHIBIT B

APPROVED DGA PLAN