Document:

EX-10.10

 Exhibit 10.10

CERTAIN CONFIDENTIAL PORTIONS OF THIS EXHIBIT HAVE BEEN OMITTED AND REPLACED WITH “[***]”. SUCH IDENTIFIED INFORMATION HAS BEEN
EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS (I) NOT MATERIAL AND (II) WOULD LIKELY CAUSE COMPETITIVE HARM TO THE COMPANY IF DISCLOSED. 

645 SUMMER STREET 

BOSTON, MA 
 LEASE
AGREEMENT 
 BETWEEN 

OPG MP PARCEL OWNER (DE) LLC, 

a Delaware limited liability company, 

AS LANDLORD 
 AND 

IKENA ONCOLOGY, INC., 
 a
Delaware corporation, 
 AS TENANT 

 LEASE AGREEMENT 

TABLE OF CONTENTS 
  

							
	 1.
	 	Basic Lease Information	  	 	1	 
	 2.
	 	Lease Grant	  	 	3	 
	 3.
	 	Term and Commencement Date	  	 	4	 
	 4.
	 	Rent	  	 	5	 
	 5.
	 	Compliance with Laws; Use	  	 	6	 
	 6.
	 	Letter of Credit	  	 	8	 
	 7.
	 	Building Services	  	 	8	 
	 8.
	 	Alterations	  	 	10	 
	 9.
	 	Repairs and Maintenance	  	 	12	 
	 10.
	 	Entry by Landlord	  	 	13	 
	 11.
	 	Assignment and Subletting	  	 	14	 
	 12.
	 	Notices	  	 	15	 
	 13.
	 	Indemnity and Insurance	  	 	16	 
	 14.
	 	Casualty Damage	  	 	18	 
	 15.
	 	Condemnation	  	 	19	 
	 16.
	 	Events of Default	  	 	20	 
	 17.
	 	Limitation of Liability	  	 	23	 
	 18.
	 	Holding Over	  	 	24	 
	 19.
	 	Surrender of Premises	  	 	24	 
	 20.
	 	Subordination; Estoppel Certificate	  	 	25	 
	 21.
	 	Miscellaneous	  	 	27	 

  

  
 i 

 LEASE AGREEMENT 

This Lease Agreement (this “Lease”) is made and entered into as of July 31, 2020 (the “Effective
Date”), by and between OPG MP PARCEL OWNER (DE) LLC, a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a Delaware corporation (“Tenant”).

 

	1.	 Basic Lease Information. 

 

	 	1.01	 “Building” shall mean the building located at 645 Summer Street, Boston, MA 02210 and commonly
known as 645 Summer Street. The “Rentable Floor Area of the Building” is deemed to be 150,000 square feet. 

“Industrial Park” shall mean the industrial park located in the City of Boston, in which the Building is located. 

 

	 	1.02	 “Premises” shall mean the area shown on Exhibit A to this
Lease. The Premises are located on a portion of the first (1st) floor of the Building and known as Suite 101.

 

	 	1.03	 “Rentable Floor Area of the Premises”: 20,752 square feet. 

 

	 	1.04	 “Estimated Term Commencement Date”: February 1, 2021. 

 

	 	1.05	 “Term Commencement Date”: See Section 3.01. 

 

	 	1.06	 “Rent Commencement Date”: The date that is three (3) months after the Term
Commencement Date. 

  

	 	1.07	 “Term Expiration Date”: The last day of the sixty-third (63rd) full calendar month following the Term Commencement Date.

  

	 	1.08	 “Base Rent”: 

 

									
	 Period
	  	Annual Base Rent Rate
Per Square Foot of
Rentable Floor Area *	 	  	Monthly
Base Rent	 
	 Lease Year 1:
	  	$	84.00	 	  	$	145,264.00	 
	 Lease Year 2:
	  	$	86.52	 	  	$	149,621.92	 
	 Lease Year 3:
	  	$	89.12	 	  	$	154,110.58	 
	 Lease Year 4:
	  	$	91.79	 	  	$	158,733.89	 
	 Lease Year 5:
	  	$	94.54	 	  	$	163,495.91	 

  

	*	 Subject to the Base Rent Waiver Period under Section 4.01 below. 

As used above, the first “Lease Year” shall commence on the Term Commencement Date and end on the day immediately preceding
the first anniversary of the Rent Commencement Date (provided that if the Rent Commencement Date does not occur on the first day of a calendar month, the first Lease Year shall further include the balance of the calendar month such first anniversary
occurs), and each subsequent Lease Year shall mean each successive period of twelve (12) calendar months following the first Lease Year during the initial Term, provided that the last Lease Year of the initial Term shall end on the Term
Expiration Date set forth above for the initial Term. 

  
 1 

	 	1.09	 “Tenant’s Proportionate Share” shall mean 13.83%, as such percentage may be adjusted from
time to time to reflect changes in the Premises or the Building; provided, however, Tenant’s Proportionate Share shall not be subject to increase during the initial Term due to any changes in the Building. 

 

	 	1.10	 Additional Provisions: See Exhibit F 

1. Parking 
 2. Right of First
Offer 
 3. Hazardous Materials 

4. Roof Rights 
 5. Emergency
Generator 
 6. Negative Conditions 
  

	 	1.11	 “Letter of Credit” shall mean the letter of credit in the amount of $871,584.00, as provided
in Section 6 and Exhibit G attached hereto. 

  

	 	1.12	 “Broker”: CBRE (“Broker”), which represented both Landlord and Tenant in
connection with this Lease. 

  

	 	1.13	 “Permitted Use”: Subject to applicable Laws (as defined below), including applicable City
of Boston zoning rules and regulations, and the terms set forth herein, general office, research and development and laboratory uses, vivarium (limited to the Animal Use) uses within the Permitted Vivarium Area only, and any ancillary uses thereto.

  

	 	1.14	 “Notice Address(es)”: 

 

			
	For Landlord:	  	For Tenant:
		
	 OPG MP Parcel Owner (DE) LLC
 c/o Oxford
Properties Group
 125 Summer Street
 Boston, MA 02110

Attention: Leasing
 Email: [***]

 
 OPG MP Parcel Owner (DE) LLC

c/o Oxford Properties Group
 125 Summer Street

Boston, Massachusetts 02110
 Attention: Legal

Email: [***]
	  	 Prior to the Term Commencement Date:
  

Ikena Oncology, Inc.
 50 Northern Avenue, 7th Floor
 Boston, MA 02210

Email: [***]
  

From and after the Term Commencement Date:
  

Ikena Oncology, Inc.
 645 Summer Street, Suite 101

Boston, MA 02210
 Email: [***]

  

	 	1.15	 “Business Day(s)” are Monday through Friday of each week, exclusive of New Year’s Day,
Presidents Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day (“Holidays”). “Building Service Hours” are 8:00 A.M. to 6:00
P.M. on Business Days. 

  
 2 

	 	1.16	 “Property” means the Building and the parcel(s) of land on which it is located and, at
Landlord’s reasonable discretion, the parking facilities and other improvements, if any, serving the Building, and the parcel(s) of land on which they are located.

 

	 	1.17	 Other Defined Terms: Other capitalized terms shall have the meanings set forth in the Lease and its
Exhibits below. References in this Lease to numbered Sections shall be deemed to refer to the numbered Sections of this Lease, unless otherwise specified. 

 

	 	1.18	 Exhibits: The following exhibits and attachments are incorporated into and made a part of this
Lease: 

 Exhibit A (Outline and Location of Premises) 

Exhibit B (Expenses and Taxes) 

Exhibit C (Work Letter) 

Exhibit D (Commencement Letter) 

Exhibit E (Building Rules and Regulations) 

Exhibit F (Additional Provisions) 

Exhibit G (Letter of Credit) 

Exhibit H (Form of SNDA) 

Exhibit I (Form of NDA) 

Exhibit J (Baseline Condition) 
  

	2.	 Lease Grant. 

2.01 Premises. Landlord hereby leases the Premises to Tenant and Tenant hereby leases the Premises from Landlord. The Premises
exclude the exterior faces of exterior walls, the common stairways and stairwells, elevators and elevator wells, fan rooms, electric and telephone closets, janitor closets, freight elevator vestibules, and pipes, ducts, conduits, wires and
appurtenant fixtures serving other parts of the Building (exclusively or in common), and other Common Areas (as defined below) of the Building. If the Premises include the entire rentable area of any floor, the common corridors, elevator lobby,
and restroom facilities located on such full floor(s) shall be considered part of the Premises. 
 2.02 Appurtenant
Rights. During the Term, Tenant shall have, as appurtenant to the Premises, the non-exclusive rights to use in common (subject to reasonable rules of general applicability to tenants and other users
of the Building from time to time made by Landlord of which Tenant is given prior notice): (a) the common lobbies, corridors, stairways, elevators and loading platform of the Building, and the pipes, ducts, conduits, wires and appurtenant
meters and equipment serving the Premises in common with others; (b) common driveways and walkways necessary for access to the Building; (c) if the Premises include less than the entire rentable floor area of any floor, the common
corridors, elevator lobby, and restroom facilities located on such floor; and (d) all other areas or facilities in or about the Building from time to time designated for general use in common by Tenant, other Building tenants, and Landlord
(collectively, the “Common Areas”).

  
 3 

	3.	 Term and Commencement Date. 

3.01 Term. The “Term” of this Lease shall begin at 12:01 a.m. on the earlier to occur of the following dates
under clauses (a) or (b), which date shall be the “Term Commencement Date”: 
 (a) the date on which Tenant first
enters into possession of all or any portion of the Premises for the regular conduct of its business. (The event described in the prior sentence shall not be deemed to occur by virtue of any entry by Tenant into the Premises under
Exhibit C for the installation or testing of Tenant’s computers or other equipment, or the installation of other property of Tenant in the Premises); or 

(b) the date Landlord delivers the Premises to Tenant (i) vacant and broom clean, (ii) with the Base Building Work and the Initial
Tenant Work substantially completed in accordance with, and subject to, the provisions of Exhibit C attached hereto, and (iii) with the Building systems and equipment serving the Premises in good working order and
condition, but otherwise in the existing “as-is” condition of the Premises (collectively, the “Delivery Condition”). The date on which the Premises are delivered to Tenant in the
Delivery Condition shall be the “Delivery Date”. Landlord shall provide bi-weekly updates to Tenant of progress towards meeting the Milestone Schedule (as defined in Exhibit C attached
hereto) and the estimated delivery of the Premises to Tenant and shall use commercially reasonable efforts to provide at least fifteen (15) Business Days’ advance notice to Tenant of the Delivery Date. As of the Effective Date, Landlord
has not received any written notice that the Premises are in violation of applicable Laws, including without limitation, the Environmental Health and Safety Laws (as defined in Exhibit F attached hereto) and the Americans with Disabilities
Act. Landlord shall perform all Base Building Work and Initial Tenant Work in compliance with all applicable Laws, including without limitation, the Environmental Health and Safety Laws and the Americans with Disabilities Act. 

The Term of this Lease shall end at 11:59 p.m. on the Term Expiration Date set forth in Section 1, unless sooner terminated in
accordance with the provisions of this Lease. Promptly after the determination of the Term Commencement Date, Landlord and Tenant shall execute and deliver a commencement letter in the form attached as Exhibit D
(the “Commencement Letter”). Tenant’s failure to execute and return the Commencement Letter, or to provide written objection to the statements contained in the Commencement Letter, within thirty (30) days
after Tenant’s receipt of the same shall be deemed an approval by Tenant of the statements contained therein. 
 3.02 Initial Tenant
Work. As used herein, the “Initial Tenant Work” shall mean all Alterations (as defined in Section 8) performed, or to be performed, in or about the Premises that are required initially to put the Premises in condition
suitable for Tenant’s use and occupancy, as listed in the “Landlord” column and identified as “Initial Tenant Work” on the Responsibility Matrix attached as Schedule C-1 to
Exhibit C attached hereto. The Initial Tenant Work shall be performed by Landlord in accordance with, and subject to, the provisions of Exhibit C attached hereto. 

3.03 Delivery. Landlord shall not be liable for any delay or failure to deliver possession of the Premises or any other space due
to the holdover or unlawful possession of such space by another party or other reason, provided, however, Landlord shall use reasonable efforts to obtain possession of any such space. Landlord shall use commercially reasonable efforts to
substantially complete the Base Building Work and the Initial Tenant Work on or before the Estimated Term Commencement Date, subject to any Tenant Delays and Force Majeure delays. Any delay in the delivery of the Premises or in the occurrence of the
Term Commencement Date shall not give rise to any liability or default by Landlord or affect any of the terms of this Lease or Tenant’s obligation to accept the Premises when delivered, except as expressly set forth in Section 3.01 or
Exhibit C, as the case may be. Notwithstanding the foregoing, (i) if the Delivery Date does not occur by the date that is thirty (30) days after the Estimated 

  
 4 

 
Term Commencement Date (as extended by delays caused by Tenant or Force Majeure), then Tenant shall receive an abatement of Rent in an amount equal to one (1) day’s Rent for each day
the Delivery Date is delayed beyond such thirty (30) day period; (ii) if the Delivery Date does not occur by the date that is ninety (90) days after the Estimated Term Commencement Date (as extended by delays caused by Tenant or Force
Majeure), then the foregoing abatement shall increase to an amount equal to two (2) days’ Rent for each day the Delivery Date is delayed beyond such ninety (90) day period; and (iii) if the Delivery Date does not occur by the
date that is one hundred fifty (150) days after the Estimated Term Commencement Date (as extended by delays caused by Tenant or Force Majeure), then Tenant shall have the right to terminate this Lease by delivering written notice thereof to
Landlord within thirty (30) days after such one hundred fifty (150) day period, provided that if Tenant does not exercise its termination right within such thirty (30) day period, then Tenant’s termination right shall be deemed
waived but Tenant’s right to an abatement of Rent hereunder shall continue until the Delivery Date occurs. Except as otherwise provided in this Lease, Tenant shall not be permitted to take possession of or enter the Premises before the Term
Commencement Date without Landlord’s permission. If Tenant takes possession of or enters the Premises before the Term Commencement Date, Tenant’s possession or entry before the Term Commencement Date shall be subject to the terms and
conditions of this Lease; provided, however, except for the cost of services used or requested by Tenant (excluding any utilities, and to the extent applicable as provided in Section 7.01 below, any after-hours loading dock charges), Tenant
shall not be required to pay Rent for any such possession or entry before the Term Commencement Date during which Tenant, with Landlord’s approval, has entered, or is in possession of, the Premises for the sole purpose of performing
improvements or installing furniture, equipment or other personal property.     
  

	4.	 Rent. 

4.01 Base Rent and Additional Rent. During the Term (but subject to the following subparagraph of this Section 4.01), Tenant
hereby covenants and agrees to pay to Landlord, without any setoff or deduction (except to the extent expressly set forth in this Lease), (a) all Base Rent (as provided in Section 1), (b) Tenant’s Proportionate Share of the
Expenses and Taxes (as provided in Exhibit B attached hereto), and (c) all other Additional Rent due for the Term (collectively referred to as “Rent”). “Additional Rent” means all
sums (exclusive of Base Rent) that Tenant is required to pay to Landlord from time to time under this Lease. 
 Notwithstanding the
foregoing, provided that Tenant is not then in Default beyond any applicable notice and cure period under the Lease, Landlord agrees to waive payment of the monthly amounts of Base Rent for the period commencing on the Term Commencement Date and
ending on the date immediately preceding the Rent Commencement Date set forth in Section 1 (the “Base Rent Waiver Period”). In the event that the Base Rent Waiver Period does not end on the last day of a calendar month,
then on the first day of the calendar month in which the Base Rent Waiver Period expires, Tenant shall pay to Landlord the amount of the Base Rent for the portion of the calendar month that follows the last day of the Base Rent Waiver Period, pro-rated on a per diem basis. For purposes of clarification of the foregoing, if the Term Commencement Date is January 15, 2021, provided that Tenant is not then in Default beyond any applicable notice and
cure period under the Lease, the Base Rent Waiver Period would be the period between January 15, 2021 and April 14, 2021, Tenant would be responsible for paying to Landlord Base Rent in the amount of $77,474.13 on April 1, 2021, and
commencing on May 1, 2021, Base Rent would be due and payable at the times and in the manner set forth in this Lease. 
 4.02 Manner
and Timing of Payments. Base Rent and other recurring monthly charges of Additional Rent shall be due and payable in advance on the first day of each calendar month without notice or demand. All other items of Rent shall be due and
payable by Tenant within thirty (30) days after Tenant’s receipt of a reasonably detailed invoice thereof. Rent shall be made payable to the entity, and sent to the address, that Landlord from time to time designates for such purposes
and shall be paid by 

  
 5 

 
Tenant by good and sufficient check payable in United States of America currency or by electronic or wire transfer to an account from time to time designated by Landlord. Landlord’s
acceptance of less than the entire amount of Rent shall be considered, unless otherwise specified by Landlord, a payment on account of the oldest obligation due from Tenant hereunder, notwithstanding any statement to the contrary contained on or
accompanying any such payment from Tenant. Rent for any partial month during the Term shall be prorated on a per diem basis. Tenant shall pay and be liable for all rental, sales and use taxes (but excluding income taxes), if any, imposed
upon or measured by Rent. No endorsement or statement on a check or letter accompanying payment shall be considered an accord and satisfaction. 
  

	5.	 Compliance with Laws; Use. 

Tenant shall use the Premises only for the Permitted Use and shall not use or permit the use of the Premises for any other purpose. Tenant
shall comply with all statutes, codes, ordinances, orders, rules and regulations of any municipal or governmental entity whether in effect now or later, including without limitation, the Environmental Health and Safety Laws (as defined in Exhibit
F attached hereto) and the Americans with Disabilities Act (“Law(s)”), regarding the operation of Tenant’s business and the use and occupancy of the Premises, subject to Landlord’s delivery obligations as expressly set
forth in this Lease. Without limiting the generality of the foregoing, and except as provided in Exhibit C attached hereto, Tenant shall be solely responsible for complying with all Laws that relate to operations of Tenant’s laboratory
and vivarium uses, and all Laws pertaining to equipment, installations and improvements used or required in connection with the operations of Tenant’s laboratory and vivarium uses. 

Tenant acknowledges and agrees that the vivarium constitutes an “Add Alternate Item” above and beyond the “Jacobs Spec
Plan” (as such terms are defined in Exhibit C) and shall be installed at Tenant’s sole cost and expense as further discussed in Exhibit C. The vivarium will be permitted to be operated in the portion of the Premises shown on
plans submitted by Tenant and approved by Landlord in accordance with Exhibit C attached hereto (the “Permitted Vivarium Area”), and shall be used for biomedical research, development, handling and testing of the Permitted
Animals (as hereinafter defined) (the “Animal Use”). Tenant shall not use any animals other than mice and rats (the “Permitted Animals”) in its operations. The movement of any Permitted Animals into or out of the
Premises shall occur only outside of Building Service Hours. In addition, Tenant shall take any reasonable actions necessary to resolve any picketing or public relations issues arising from the Animal Use, and shall have pickets removed. The Animal
Use shall be permitted subject to the following: (i) all research, development, handling and testing of the Permitted Animals shall be conducted in strict compliance with all applicable Laws and with good scientific and medical practice;
(ii) all dead animals, any part thereof or any waste products related thereto, shall be disposed of, at Tenant’s sole cost and expense, in strict compliance with all applicable Laws and with good scientific and medical practice;
(iii) no odors, noises or any similar nuisance shall be permitted to emanate from or permeate outside the Premises; and (iv) Tenant’s use of the vivarium shall not interfere with the peaceable and quiet use and enjoyment by other
tenants or occupants of the Industrial Park. Tenant shall procure and deliver to Landlord copies of all necessary permits and approvals necessary for the use and operation of the vivarium before allowing any actual Permitted Animals onto the
Premises and shall maintain such permits and approvals during the Term.  
 Tenant shall comply with applicable laboratory practices,
(including the use of safety equipment) and policies established by the Center for Disease Control and Prevention (the “CDC”), and Tenant’s use of the Premises shall not exceed applicable Biosafety Level 2 (“BSL-2”) requirements and protocols in effect with respect to Tenant’s use from time to time, and Tenant shall store, use and dispose of Hazardous Materials in compliance with all applicable
Environmental, Health and Safety Laws. 

  
 6 

 In addition, Tenant shall, at its sole cost and expense, promptly comply with any Laws that
relate to the Base Building (defined below), but only to the extent such obligations are triggered by (i) Tenant’s vivarium use and/or (ii) any other use of the Premises by Tenant (other than for general office use) to the extent that
such use requires compliance work beyond the baseline condition described in Exhibit J attached hereto, and/or (iii) any Alterations (as defined in Section 8.01) in or about the Premises performed or requested by Tenant after the
Term Commencement Date, provided that Landlord shall perform the Base Building Work and the Initial Tenant Work in a good and workmanlike manner and in compliance with all applicable Laws. Except to the extent the same are expressly set forth herein
as obligations of Tenant, Landlord shall be responsible for the compliance of the Base Building with all applicable Laws. All costs incurred by Landlord for compliance work shall be included in Expenses except as otherwise expressly provided in
Exhibit B attached hereto. “Base Building” shall include the structural portions of the Building, the common restrooms, the Building mechanical, electrical, and plumbing systems and equipment located in the internal core of
the Building on the floor or floors on which the Premises are located, and the pH Neutralization System (as defined below). Tenant shall promptly provide Landlord with copies of any notices it receives regarding an alleged violation of
Law. Except as otherwise provided herein, Tenant shall be solely responsible, at Tenant’s sole cost and expenses, for obtaining all operational permits, licenses and approvals required in order for Tenant to use the Premises for the
Permitted Use (excluding any permits, licenses, and approvals required for the construction of the Initial Tenant Work and/or the Base Building Work, which shall be Landlord’s responsibility). As part of the Landlord’s performance of the
Initial Tenant Work, Landlord shall tie the Premises into the existing Base Building pH neutralization system (the “pH Neutralization System”), in accordance with any discharge permits required by the Massachusetts Water Resources
Authority (the “MWRA Permits”), which MWRA Permits shall be held in Landlord’s name, provided that, to the extent required for Tenant’s use, Tenant shall obtain a wastewater treatment operator license from the Commonwealth
of Massachusetts. The monitoring, repair and maintenance costs of the pH Neutralization System shall be passed through to Tenant on a pro-rata basis, based upon the proportion that the Rentable Floor Area of
the Premises bears to the total rentable floor area of all tenant-occupied space tied into the pH Neutralization System; provided that any capital repairs and capital replacements shall be passed through only to the extent the same are Permitted
Capital Expenses, in which event the amortized cost thereof shall be passed through to Tenant in the same manner as provided in Exhibit B. 

If any governmental license or permit required to be obtained by Tenant shall be required for the proper and lawful conduct of Tenant’s
business at the Premises (including, without limitation, all permits and approvals required for the use and operation of the vivarium and any required wastewater treatment operator license), Tenant, at Tenant’s expense, shall duly procure and
thereafter maintain such license and submit the same to inspection by Landlord. Tenant, at Tenant’s expense, shall at all times comply in all material respects with the terms and conditions of each such license or permit. Tenant shall provide
Landlord with copies of all such licenses, permits and approvals required for Tenant’s use, including any permits, licenses and registrations required pursuant to Environmental Health and Safety Laws that are obtained or renewed during the
Term. 
 Tenant shall not exceed the standard density limit for the Building, which is 1 person per 150 useable square feet. Tenant shall
not use or permit the use of any portion of the Premises or any equipment installed by Tenant or any party acting under or through Tenant in a manner that results in objectionable noise, odors, or vibrations emanating from the Premises and shall
prevent the emanation of noxious odors, smoke, vibration, noise, water or other effects which constitute a nuisance or otherwise interfere with the safety or comfort of Landlord or of any of the other occupants of the Building. Without limiting the
generality of the foregoing sentence, Tenant shall not use any portion of the Premises for a personal fitness or exercise area or install or use any exercise equipment therein. Tenant shall comply with the rules and regulations of the Building
attached as Exhibit E and such other reasonable rules and regulations adopted by Landlord from time to time of which Tenant is given prior written notice, including rules and regulations for the performance of Alterations.
In the event of any conflict between the terms of this Lease and the rules and regulations, the terms of this Lease shall control. 

  
 7 

 Notwithstanding anything to the contrary contained in this Lease, during the Term, Tenant
shall be entitled to the allocation of 27.70% of the maximum allowable chemical quantities (both in use and in storage) permitted by MAQ Codes (defined below) for the first (1st) floor of the
Building, which maximum allowable chemical quantities for the entire first (1st) floor is 240 liquid gallons, subject to Tenant maintaining all licenses, permits and approvals required therefor.
As used herein, “MAQ Codes” shall mean 780 CMR – Massachusetts State Building Code 9th Edition, 527 CMR – Massachusetts Comprehensive Fire Safety Code, and NEPA 45
– Standard on Fire Protection for Laboratories Using Chemicals, 2011 Edition. 
  

	6.	 Letter of Credit. 

Concurrently with Tenant’s execution and delivery of this Lease, Tenant shall deliver to Landlord a clean, irrevocable letter of credit in the amount set
forth in Section 1, which shall comply with, and may be drawn by Landlord in accordance with, the provisions of Exhibit G attached hereto (such letter of credit, together with any renewal or replacement thereof in
accordance herewith, being referred to herein as the “Letter of Credit”). 
  

	7.	 Building Services. 

7.01 Building Services. Landlord shall furnish Tenant with the following services (the costs of which shall be included in
Expenses, except for such costs that are separately metered or check metered for the Premises, all of which separately metered or check metered costs shall be paid by Tenant as provided below): (a) reasonable quantities of hot and cold water
for use in the Base Building restrooms and reasonable quantities of cold water for use in the Premises (provided that Landlord shall deliver the Premises in the baseline condition described in Exhibit J attached hereto and with the
Base Building Work substantially complete in accordance with the terms and provisions of this Lease); (b) Base Building gas and customary heat and air conditioning in season during the Building Service Hours at such temperatures and in such
amounts that are standard in comparable buildings in the Greater Boston area for laboratory and office space; (c) standard janitorial service for the Common Areas nightly on Business Days (it being acknowledged and agreed that Tenant shall be
solely responsible for all cleaning and janitorial services for the Premises per Section 9.01 of this Lease) and the provision of a dumpster at the shared loading dock for the Building, for the
non-exclusive use by Tenant and other Building occupants for disposal of ordinary trash (i.e., non-organic and non-controlled
substances that do not constitute Hazardous Materials) (the “Ordinary Trash Dumpster”); (d) elevator service; (e) electricity in accordance with the terms and conditions in Section 7.02; (f) access to the
Building for Tenant and its employees 24 hours per day/7 days per week, subject to the terms of this Lease and such reasonable protective services or monitoring systems, if any, as Landlord may from time to time impose, including, without
limitation, sign-in procedures and/or presentation of identification cards; and (g) such other services as Landlord reasonably determines are necessary or appropriate for the Property. To the extent
that any of the foregoing utility services for the Premises are separately metered, Tenant shall timely pay the separate charges for such services directly to the applicable utility company. To the extent that any of the foregoing utility services
for the Premises (including, without limitation, air handling units or other HVAC equipment serving the Premises) or any other equipment serving the Premises, whether exclusively or in common, is not metered directly by the utility company to the
Premises, Tenant shall pay to Landlord, as Additional Rent, the costs of such utility service (without mark-up) by a separate charge payable by Tenant to Landlord based on evidence from the check-meters
installed for the Premises or equipment serving the Premises or, for any portion of the Premises or equipment that from time to time does not have operational check-meters, based on reasonable allocations prepared by Landlord’s building

  
 8 

 
engineer for the space and period in question. As part of the Landlord’s performance of the Initial Tenant Work, Landlord shall install, at Landlord’s cost, check meters for the
Premises for (i) gas, (ii) chilled water and hot water for HVAC service and (iii) as provided in Section 7.02, for electricity. Tenant shall pay to Landlord, as Additional Rent, the actual costs of such utility service (without mark-up) in arrears by a separate charge payable by Tenant to Landlord based on evidence from such check-meters installed for the Premises. In lieu of billing actual utility charges in arrears pursuant to the
foregoing, Landlord shall have the right to require that Tenant make estimated monthly payments for such utility charges payable to Landlord hereunder, in advance on the first day of each month or partial month of the Term, based on amounts
estimated by Landlord from time to time for such utility charges and provided to Tenant in writing, subject to quarterly reconciliations based on actual check-meter readings and utility rates for the space and period in question. As part of the
Initial Tenant Work, Landlord shall provide supplemental HVAC equipment to provide redundant HVAC service for vivarium holding rooms only in accordance with the following specifications: Landlord will install a fan coil unit to provide redundant
HVAC for holding rooms 1138 & 1139, and future holding rooms 1137A & 1145, in accordance with the specification therefor in Addendum 1 to the 645 Summer Street Spec Lab & Office CD set issued June 12, 2020 (the
“Vivarium Supplemental HVAC Equipment”). Landlord’s obligation to provide any HVAC equipment or services beyond the Base Building shall be limited to providing the Vivarium Supplemental HVAC Equipment, and Tenant expressly
acknowledges and agrees that Tenant shall be solely responsible for any inadequacy in HVAC services for Tenant’s use. If, at Tenant’s request, Landlord, or an affiliated or third party service provider, provides any services that are not
Landlord’s express obligation under this Lease, including, without limitation, any repairs which are Tenant’s responsibility pursuant to Section 9 below, Tenant shall pay to the applicable service provider the cost of such services.
Tenant shall have the right to use the loading dock for Building (including during Tenant’s initial move in to the Premises) on a non-discriminatory basis, subject to any reasonable rules and regulations
promulgated by Landlord from time to time with respect to such use, including without limitation, any scheduling protocols. Landlord currently does not charge tenants any fee for loading dock usage; however, if in the future Landlord determines that
use of the loading dock outside of Building Service Hours poses a security concern for the Building and/or the tenants and occupants thereof, then Landlord reserves the right to employ security detail for any after-hours use by Tenant and Tenant
shall pay the actual cost for such after-hours use charged by the security vendor from time to time, plus an administrative charge in the amount of twenty percent (20%) of such cost. 

7.02 Tenant Electricity. The Premises shall be check metered for electricity by Landlord as part of the Initial Tenant Work. Tenant
shall pay to Landlord, as Additional Rent, the actual costs of such electricity (without mark-up) in arrears by a separate charge payable by Tenant to Landlord based on evidence from such check-meters
installed for the Premises. In lieu of billing actual electricity charges in arrears pursuant to the foregoing, Landlord shall have the right to require that Tenant make estimated monthly payments for such electricity charges hereunder, in advance
on the first day of each month or partial month of the Term, based on amounts estimated by Landlord from time to time for such electricity charges, subject to quarterly reconciliations based on actual meter readings and utility rates for the space
and period in question. Without the consent of Landlord, Tenant’s use of electrical service shall not exceed the Building’s standard capacity, as reasonably determined by Landlord, based upon the Building standard electrical design
load. The Building’s 4000 amp, 480/277 volt electrical service can accommodate lab tenants with an approximate 50-50 split between office and laboratory use within each tenant premises located on the
first floor of the Building. The estimated electrical load for lighting, receptacle and ventilation allocated in each tenant premises is 6 va per square foot for office space, and 18 va per square foot for laboratory space. 

  
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 7.03 Interruption of Services. Landlord’s failure to furnish, or any
interruption, diminishment or termination of services due to the application of Laws, the failure of any equipment, the performance of maintenance, repairs, improvements or alterations, utility interruptions or the occurrence of an event of Force
Majeure (defined in Section 21.06) or any other cause (collectively a “Service Failure”) shall not render Landlord liable to Tenant, constitute a constructive eviction of Tenant, give rise to an abatement of Rent, nor
relieve Tenant from the obligation to fulfill any covenant or agreement, except as provided in the next sentence. If the Premises, or a material portion of the Premises, are made untenantable for a period in excess of five (5) consecutive
Business Days after written notice thereof from Tenant to Landlord, as a result of a Service Failure that is reasonably within the control of Landlord to correct, then Tenant, as its sole remedy, shall be entitled to receive an abatement of Rent
payable hereunder during the period following such five-(5)-Business-Day period and ending on the day the service has been restored. If the entire Premises has not been rendered untenantable by the
Service Failure, the amount of abatement shall be equitably prorated. This Section shall not apply to any Service Failure arising from a casualty event governed by Section 14 below. 

7.04 Reservations. Without limiting the generality of the foregoing, Landlord reserves the right from time to time upon advance
notice to Tenant to modify components of the access procedures for the Building or other portions of the Property, to change the number of lobby attendants, or to institute, modify, supplement, or discontinue any particular access control procedures
or equipment for the Building, whether during or after business hours. Landlord does not warrant or guarantee the effectiveness of any such system or procedures. Tenant expressly disclaims any such warranty, guarantee, or undertaking by
Landlord with respect thereto and acknowledges that access control procedures from time to time in effect are solely for the convenience of tenants generally and are not intended to secure the Premises or to guarantee the physical safety of any
persons in or about the Premises or the Property. Tenant shall be responsible for securing the Premises, including without limitation by Tenant’s installation of access card readers or other security equipment for the Premises in
accordance with Exhibit C and/or Section 8 and by restricting or monitoring access into and from the Premises by its employees or other invitees. At the time that any Tenant employee (or other person acting under
or through Tenant) who has been issued a Building access card is terminated or otherwise ceases to work at the Premises, Tenant shall retrieve and destroy the Building access card for such person and, in accordance with the Building’s standard
procedures, notify the Building’s property manager that such person should be removed from the active list for Building access cards. 
  

	8.	 Alterations 

8.01 Alterations. Tenant shall not make alterations, repairs, additions or improvements or install any Cable (collectively referred
to as “Alterations”) in the Premises, without first obtaining the written consent of Landlord in each instance, which consent shall not be unreasonably withheld, conditioned or delayed. “Cable” shall mean and refer
to any electronic, fiber, phone and data cabling and related equipment that is installed by or for the exclusive benefit of Tenant or any party acting under or through Tenant. Prior to starting work on any Alterations, Tenant shall furnish
Landlord with plans and specifications (which shall be in CAD format if requested by Landlord); names of contractors reasonably acceptable to Landlord (provided that Landlord may reasonably designate specific contractors with respect to Base
Building, as may be described more fully below, and provided further that it shall be reasonable for Landlord to require any contractor or subcontractor performing work on or about the Premises or Building to employ union labor and any construction
manager utilized by Tenant to be a union-associated construction manager); required permits and approvals; evidence of contractor’s and subcontractor’s insurance in amounts reasonably required by Landlord and naming as additional insureds
the Landlord, the managing agent for the Building, and such other Additional Insured Parties (as defined in Section 13) as Landlord may designate for such purposes; and any security for performance in amounts reasonably required by Landlord
(except that Landlord may only require such security for any Alterations the cost of which is estimated to exceed $200,00.00 and Landlord shall not require any security for the Initial Tenant Work). All Cable shall be clearly marked with
adhesive plastic labels (or plastic tags attached to such Cable with wire) to show Tenant’s name, suite number, and the purpose of such Cable 

  
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(i) every 6 feet outside the Premises (specifically including, but not limited to, the electrical room risers and any Common Areas), and (ii) at the termination point(s) of such
Cable. Material changes to the plans and specifications must also be submitted to Landlord for its approval. Alterations shall be constructed in a good and workmanlike manner using materials of a quality reasonably approved by Landlord,
and Tenant shall ensure that no Alteration adversely affects any Building system or Landlord’s ability to perform its obligations hereunder. Tenant shall reimburse Landlord for any third-party expenses incurred by Landlord in connection with
the review, inspection, and coordination of Tenant’s plans for Alterations and Tenant’s performance thereof, and pay to Landlord or its managing agent a fee for Landlord’s administrative oversight and coordination of any Alterations
equal to 2% of the hard costs of the Alterations. Upon completion, Tenant shall furnish “as-built” plans (in CAD format, if requested by Landlord) for
non-Cosmetic Alterations, customary AIA completion affidavits, full and final waivers of lien, and any applicable certificate of occupancy for the space affected by such Alterations. Landlord’s
approval of an Alteration shall not be deemed to be a representation by Landlord that the Alteration complies with Law or will not adversely affect any Building system. If any Alteration requires any change to the Base Building, any Building
system, or any Common Area, then such changes shall be made at Tenant’s sole cost and expense and performed, at Landlord’s election, either by Tenant’s contractor or a contractor engaged by Landlord. Notwithstanding the
foregoing, Landlord’s consent shall not be required for any Alteration that satisfies all of the following criteria (a “Cosmetic Alteration”): (a) is of a cosmetic nature such as painting, wallpapering, hanging
pictures and installing carpeting; (b) is not visible from the exterior of the Premises or Building; (c) will not affect the Base Building (defined in Section 5); and (d) does not require work to be performed inside the walls or
above the ceiling of the Premises. Cosmetic Alterations shall be subject to all the other provisions of this Section 8.03, to the extent applicable thereto.

8.02 Liens. Tenant shall not cause or permit any mechanics’ or other liens to be placed upon the Property, the Premises, or
Tenant’s leasehold interest hereunder in connection with any work or service done or purportedly done by or for the benefit of Tenant, its subtenants, or any other party acting under or through Tenant (excluding the Initial Tenant
Work). Tenant shall give Landlord notice at least forty-five (45) days prior to the commencement of any work in the Premises to afford Landlord the opportunity, where applicable, to post and record notices of
non-responsibility. Tenant, within thirty (30) days after notice from Landlord, shall fully discharge any such lien by settlement, by bonding or by insuring over the lien in the manner prescribed by
the applicable lien Law. If Tenant fails to timely discharge such lien within such period, Tenant shall be deemed in Default under this Lease and, in addition to any other remedies available to Landlord as a result of such Default by Tenant,
Landlord, at its option, may bond, insure over or otherwise discharge the lien. Tenant shall reimburse Landlord for any amount paid by Landlord to discharge such lien, including, without limitation, reasonable attorneys’
fees. Landlord shall have the right to require Tenant to post a performance or payment bond in connection with any work or service done or purportedly done by or for the benefit of Tenant. Tenant acknowledges and agrees that all such work
or service is being performed for the sole benefit of Tenant and not for the benefit of Landlord. 
 8.03 Leasehold
Improvements. All Initial Tenant Work and other leasehold improvements from time to time made in and to the Premises (collectively, “Leasehold Improvements”) shall, except as expressly provided in this Lease, remain upon
the Premises at the end of the Term without compensation to Tenant. Landlord, by written notice to Tenant at the time Landlord provides its approval for a proposed Alteration, may require Tenant, at Tenant’s expense, to remove any Leasehold
Improvements or other affixed installations that, in Landlord’s reasonable judgment, are of a nature that would require removal and repair costs that are materially in excess of the removal and repair costs associated with the baseline
condition described in Exhibit J attached hereto (“Required Removables”). Required Removables shall include, without limitation, internal stairways, raised floors, private baths and showers, vaults, rolling file
systems, structural alterations and modifications and any Cable installed by or on 

  
 11 

 
behalf of Tenant; provided, however, that, notwithstanding anything to the contrary contained in this Lease, Required Removables shall not include any Initial Tenant Work and Tenant shall not be
required to remove any portion of the Initial Tenant Work at the end of the Term, except as may be required in connection with Tenant’s decommissioning obligations set forth in Exhibit F attached hereto. The Required Removables shall be
removed by Tenant before the expiration or earlier termination of this Lease in accordance with Section 19. 
 8.04 Signage. No
signs, advertisements or notices shall be painted or affixed to windows, doors or other parts of the Building, except those of such color, size, style and in such places as are first approved in writing by Landlord. All tenant identifications,
suite number and branding at the entrance to the Premises shall be subject to Landlord’s prior written approval in Landlord’s reasonable discretion, and shall be installed by Landlord, at Tenant’s cost and expense, using the standard
graphics for the Building. Landlord, at its sole cost, shall provide Tenant with Building standard signage on all existing tenant directories at the Building. 
  

	9.	 Repairs and Maintenance. 

9.01 Tenant Obligations. During the Term, Tenant, at its sole cost and expense, shall perform all maintenance and repairs to the non-structural elements of the Premises that are not Landlord’s express responsibility under this Lease, and keep the Premises (other than those elements thereof or therein which are Landlord’s express
responsibility under this Lease) in good condition and repair, reasonable wear and tear, and damage by Casualty, or taking by eminent domain (which shall instead be governed by Articles 14 and 15 below) excepted. Tenant’s repair and maintenance
obligations include, without limitation, repairs to: (a) floor covering; (b) interior partitions; (c) doors; (d) the interior side of demising walls; (e) Alterations (described in Section 8); (f) supplemental air
conditioning units, kitchens, including hot water heaters, plumbing, and similar facilities exclusively serving the Premises or any portion thereof, whether such items are installed by Tenant or are currently existing in the Premises (other than the
Base Building air handling units outside the Premises, which will be maintained by Landlord); and (g) any Cable. Tenant shall maintain in effect throughout the Term maintenance contracts for any such supplemental air conditioning units or
other specialty equipment exclusively serving the Premises and, from time to time upon Landlord’s request, provide Landlord with a copy of such maintenance contract and reasonable evidence of its service record. All repairs and other work
performed by Tenant or its contractors, including that involving Cable, shall be subject to the terms of Section 8.01 above. If Tenant fails to make any repairs to the Premises required to be made by Tenant hereunder for more than thirty
(30) days after notice from Landlord (although notice shall not be required in an emergency), Landlord may (but shall not be required to do so) make the repairs, and, within thirty (30) days after demand, Tenant shall pay to Landlord the
reasonable cost of the repairs. 
 Landlord shall have no obligation to provide any cleaning, janitorial or refuse or waste removal services
in or to the Premises (other than providing the Ordinary Trash Dumpster pursuant to Section 7.01 above). Tenant shall be responsible, at its sole cost and expense, for providing cleaning and janitorial services to the Premises in a neat and
first-class manner consistent with the cleaning standards generally prevailing in comparable buildings in the Greater Boston area for laboratory and office space or as otherwise reasonably established by Landlord in writing from time to time, using
an insured contractor or contractors selected by Tenant and reasonably approved in writing by Landlord (it being acknowledged and agreed that it shall be reasonable for Landlord to require a union contractor) and such provider shall not interfere
with the use and operation of the Building or Property by Landlord or any other tenant or occupant thereof. Tenant shall also be responsible to arrange for, at Tenant’s sole cost and expense, any waste (including biomedical, hazardous and
laboratory waste) and refuse removal services for Tenant’s operations at the Premises. All waste (including biomedical, hazardous and laboratory waste) and refuse removal shall be performed in compliance with applicable environmental Laws using
licensed laboratory 

  
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waste disposal companies. All ordinary trash (i.e., non-organic and non-controlled substances that do not
constitute Hazardous Materials) may be stored in the Ordinary Trash Dumpster, but all biomedical, hazardous and laboratory waste and refuse shall be stored in the Premises and shall be removed in compliance with applicable environmental Laws. Tenant
shall also cause all extermination of vermin (which expressly excludes the Permitted Animals) in the Premises or resulting from Tenant’s use of the Premises to be performed by companies reasonably approved by Landlord in writing and shall
contract and utilize pest extermination services as reasonably necessary or as reasonably requested by Landlord. 
 9.02 Landlord
Obligations. Landlord shall keep and maintain in good repair and working order and perform maintenance to keep the same in such condition (a) the structural elements of the Building, including the foundation, exterior walls, structural
columns, structural beams and exterior doors; (b) the mechanical (including HVAC), electrical, plumbing, fire/life safety, and all other systems serving the Building tenants in general (but excluding any supplemental air conditioning units, hot
water heaters, and similar equipment installed by Tenant, any systems or equipment exclusively serving the Premises and any Cable) and the Base Building (i.e., not supplemental) air handling units that serve the Premises; (c) the Common Areas;
(d) the roof of the Building, including the structural aspects thereof; (e) the exterior windows and exterior mullions of the Building; (f) the elevators serving the Building, and (g) the pH Neutralization System. Subject to
reasonable wear and tear, and damage by Casualty, or taking by eminent domain (which shall instead be governed by Articles 14 and 15 below), Landlord shall from time to time make repairs for which Landlord is responsible hereunder. 

 

	10.	 Entry by Landlord. 

Landlord may enter the Premises to inspect, show or clean the Premises or to perform or facilitate the performance of repairs, alterations or additions to the
Premises or any portion of the Building. Except in emergencies or to provide Building services, Landlord shall provide Tenant with at least twenty-four (24) hours’ prior written notice of entry (which may be by email). In
connection with any such entry for non-emergency work performed during Building Service Hours, Landlord shall use reasonable efforts, consistent with the operation of a first-class high rise building, not to
unreasonably interfere with Tenant’s use of the Premises, and will use commercially reasonable efforts not to close the Building or prevent access to the Premises (subject to Landlord’s reasonable judgment in connection with
emergencies or imminent damage or danger). If reasonably necessary, Landlord may temporarily close all or a portion of the Premises to perform repairs, alterations and additions. Landlord shall not close the Premises during Building Service Hours if
the work can reasonably be performed on weekends and/or after Building Service Hours. Any such entry by Landlord shall not constitute a constructive eviction or entitle Tenant to an abatement or reduction of Rent. Notwithstanding the foregoing, in
the event that the Premises is closed or access thereto is completely denied in connection with any such repairs, alterations or additions and not due to Force Majeure, and such prohibited access continues for more than one (1) day, then
commencing on the second day of such prohibited access, Rent shall abate for each day that Tenant is prevented from having any access to the Premises due to such work and not due to Force Majeure (it being acknowledged and agreed that there shall be
no abatement of Rent so long as Tenant has minimum access to the Premises nor shall there be any abatement of Rent in connection with any Force Majeure). Tenant shall at all times, except in the case of emergencies, have the right to escort Landlord
or its agents, representatives, contractors or guests while the same are in the Premises, provided that Tenant makes such representative available when such access is reasonably agreed and provided that such escort does not materially and adversely
affect Landlord’s access rights hereunder. Landlord shall use reasonable efforts to comply with Tenant’s reasonable security, confidentiality and safety requirements with respect to entering restricted portions of the Premises; provided,
however, that Tenant has notified Landlord of such security, confidentiality and safety requirements reasonably prior to Landlord’s entry into the Premises and provided further that in no event shall Tenant bar or prohibit access by Landlord
and its employees, agents and contractors for the performance of the obligations of Landlord or the exercise of the rights of Landlord under this Lease. 

  
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	11.	 Assignment and Subletting. 

11.01 Transfers. Except as otherwise provided in Section 11.04 below, Tenant shall not assign, sublease, transfer or encumber
any interest in this Lease or allow any third party to use all or any portion of the Premises (in each such case, collectively or individually, a “Transfer” to a “Transferee”) without the prior written consent of
Landlord, which consent shall not be unreasonably withheld, conditioned or delayed if Landlord does not exercise its recapture rights under Section 11.02. Without limitation, it is agreed that Landlord’s consent shall not be
considered unreasonably withheld if the proposed Transferee (a) is a governmental entity or is an existing occupant of the Building, (b) whether or not an existing occupant of the Building, has been in discussions with Landlord regarding
the leasing of space within the Building within the preceding six (6) months, (c) is incompatible with the character of occupancy of the Building, as reasonably determined by Landlord, or (d) would subject the Premises to a use which
would: (i) violate any exclusive right granted to another tenant of the Building; (ii) require any addition to or modification of the Premises or the Building in order to comply with building code or other governmental requirements; or
(iii) involve a violation of the Permitted Use clauses of this Lease. Except as permitted under Section 11.04 below, if the entity(ies) that directly or indirectly controls the voting shares/rights of Tenant (other than through the
ownership of voting securities listed on a recognized securities exchange) changes at any time, such change of ownership or control (“Change in Control”) shall constitute a Transfer. Any Transfer in violation of this Section
shall, at Landlord’s option, be deemed a Default by Tenant as described in Section 16.01, and shall be voidable by Landlord. In no event shall any Transfer, including a Permitted Transfer, release or relieve the Tenant from any
obligation under this Lease, and the Tenant entity originally named in this Lease shall remain primarily liable for the performance of the tenant’s obligations under this Lease, as amended from time to time. 

11.02 Process. Tenant shall provide Landlord with financial statements for the proposed Transferee (or, in the case of a change of
ownership or control, for the proposed new controlling entity(ies)), a copy of the final form of the proposed assignment, sublease, or other Transfer documentation, and such other information as Landlord may reasonably request within ten
(10) Business Days after Tenant’s consent request. Within ten (10) Business Days after receipt of the required information and documentation, Landlord shall either: (a) consent to the Transfer by execution of a consent agreement
in a form reasonably acceptable to Landlord; (b) reasonably refuse to consent to the Transfer in writing specifying the reasons therefor; or (c) in the event of a proposed assignment of this Lease or subletting of all or part of the
Premises for a sublease term for all or substantially all of the remainder of the Term (meaning that the sublease will expire with one (1) year or less remaining in the then lease Term), recapture the portion of the Premises that Tenant is
proposing to Transfer. If Landlord exercises its right to recapture, this Lease shall automatically be amended (or terminated if the entire Premises is being assigned or sublet) to delete the applicable portion of the Premises effective on the
proposed effective date of the Transfer, although Landlord may require Tenant to execute a reasonable amendment or other document reflecting such reduction or termination. Notwithstanding the foregoing, if Landlord recaptures the applicable
portion of the Premises, Tenant may elect to rescind its request for Landlord’s consent to an assignment or subletting and nullify Landlord’s recapture by notice to Landlord delivered no later than ten (10) Business Days following
receipt of Landlord’s recapture election. Tenant shall pay to Landlord the reasonable costs and attorneys’ fees incurred by Landlord in connection with such requested Transfer not to exceed $5,000.00; provided, however, if neither Tenant
nor the proposed Transferee requests any material changes to this Lease or Landlord’s standard form of consent in connection with the proposed Transfer, such costs shall not exceed $1,500.00. 

  
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 11.03 Excess Payments. In the event, if any, that (i) all rent and other
consideration which Tenant receives as a result of and attributable to Tenant’s actual transfer of its occupancy rights in the Premises exceeds (ii) the Rent payable to Landlord for the portion of the Premises and Term covered by the
Transfer, then Tenant shall, at Landlord’s election, pay to Landlord an amount equal to fifty percent (50%) of such excess, from time to time on a monthly basis upon Tenant’s actual receipt of such excess; provided that in determining any
such excess, Tenant may deduct from the excess all reasonable and customary expenses directly incurred by Tenant in connection with such Transfer, except that any construction costs incurred by Tenant in connection with such Transfer shall be
deducted on a straight-line basis over the term of the applicable Transfer. If Tenant is in Default, Landlord may require that all sublease payments be made directly to Landlord, in which case Tenant shall receive a credit against Rent in the
amount of Tenant’s share of payments received by Landlord. 
 11.04 Permitted Transfers. Tenant may (i) assign this
Lease or sublet all or a portion of the Premises to a successor to Tenant by merger, consolidation, or the purchase of all or substantially all of Tenant’s assets or ownership interests or effectuate a Change in Control event (collectively, a
“Permitted Successor Entity Transfer”), or (ii) assign this Lease or sublet all or a portion of the Premises to an Affiliate (defined below), in any event, without the consent of Landlord (each a “Permitted
Transfer” and each such transferee a “Permitted Transferee”), provided that all of the following conditions are satisfied: (a) Tenant must not be in Default; (b) Tenant must give Landlord written notice at
least fifteen (15) Business Days before such Transfer, or, if the transfer or transaction is subject to confidentiality restrictions, promptly following the effective date of such assignment or sublease; and (c) if the Transfer is a
Permitted Successor Entity Transfer, the Credit Requirement (defined below) must be satisfied. Tenant’s notice to Landlord shall include information and documentation evidencing that the Transfers qualifies as a Permitted Transfer
hereunder and that each of the above conditions has been satisfied. “Affiliate” shall mean an entity controlled by, controlling or under common control with Tenant and “control” shall mean ownership of fifty
percent (50%) or more of the voting shares/rights of the applicable entity. The “Credit Requirement” shall be deemed satisfied if, as of the date immediately preceding the date of the Permitted Transfer, the Net Worth
of the successor entity is not less than the Net Worth of Tenant as determined in accordance with generally accepted accounting principles and provided on Tenant’s unaudited financial statements submitted to Landlord for Tenant’s
financial quarter between January 1, 2020 and March 31, 2020. For the purposes herein, “Net Worth” shall be calculated as Total Assets – Total Liabilities – Intangible Assets. 

11.05 Prohibited Matters. Without limiting Landlord’s right to withhold its consent to any transfer by Tenant, and regardless
of whether Landlord shall have consented to any such transfer, neither Tenant nor any other person having an interest in the possession, use or occupancy of the Premises or any part thereof shall enter into any lease, sublease, license, concession,
assignment or other transfer or agreement for possession, use or occupancy of all or any portion of the Premises which provides for rent or other payment for such use, occupancy or utilization based, in whole or in part, on the net income or profits
derived by any person or entity from the space so leased, used or occupied, and any such purported lease, sublease, license, concession, assignment or other transfer or agreement shall be absolutely void and ineffective as a conveyance of any right
or interest in the possession, use or occupancy of all or any part of the Premises.
  

	12.	 Notices. 

All demands, approvals, consents or notices (collectively referred to as a “notice”) shall be in writing and delivered by hand or sent by
registered, express, or certified mail, with return receipt requested or with delivery confirmation requested from the U.S. postal service, or sent by overnight or same day courier service at the party’s respective Notice Address(es) set forth
in Section 1; provided, however, notices may be sent via e-mail to the e-mail address provided by the other party for notices under this Lease so long as

  
 15 

 
such notice is also simultaneously given pursuant to one of the other foregoing methods of delivery. In addition, if the Building is closed (whether due to emergency, governmental order or any
other reason), then any notice address at the Building shall not be deemed a required notice address during such closure, and, unless Tenant has provided an alternative valid notice address to Landlord for use during such closure, any notices sent
during such closure may be sent via e-mail or in any other practical manner reasonably designed to ensure receipt by the intended recipient. Each notice shall be deemed to have been received on the
earlier to occur of actual delivery or the date on which delivery is refused, or, if Tenant has vacated the Premises or any other Notice Address of Tenant without providing a new Notice Address, three (3) Business Days after notice is deposited
in the U.S. mail or with a courier service in the manner described above. Either party may, at any time, change its Notice Address (other than to a post office box address) by giving the other party written notice of the new address. 

 

	13.	 Indemnity and Insurance. 

13.01 Indemnification. Subject to the waiver set forth in Section 13.04 and except to the extent caused by the negligence or
willful misconduct of Landlord or any Landlord Related Parties (defined below), and to the maximum extent permitted under applicable law, Tenant shall indemnify, defend and hold Landlord and Landlord Related Parties harmless against and from all
liabilities, obligations, damages, penalties, claims, actions, costs, charges and expenses, including, without limitation, reasonable attorneys’ fees and other professional fees (to the extent permitted by applicable Law) (collectively referred
to as “Losses”), which may be imposed upon, incurred by or asserted against Landlord or any of the Landlord Related Parties by any third party and arising out of or in connection with (i) any damage or injury occurring in the
Premises or (ii) any damage or injury which occurs at or about the Property to the extent caused by the negligence or willful misconduct of Tenant, or its trustees, managers, members, principals, beneficiaries, partners, officers, directors,
employees and agents (the “Tenant Related Parties”) or any of Tenant’s transferees, contractors or licensees. Subject to the waiver set forth in Section 13.04 and except to the extent caused by the negligence or
willful misconduct of Tenant or any Tenant Related Parties, Landlord hereby agrees to indemnify, defend and hold Tenant and the Tenant Related Parties harmless from and against any and all Losses for property damage, personal injury or any other
matter arising, claimed, charged or incurred against or by Tenant or any of the Tenant Related Parties in connection with or relating to any event, condition, matter or thing which occurs in, at or about the Property to the extent due to the
negligence or willful misconduct of Landlord or its trustees, managers, members, principals, beneficiaries, partners, officers, directors, employees, Mortgagees (defined in Section 20) and agents (the “Landlord Related Parties”
and together with the Tenant Related Parties, the “Related Parties”). To the maximum extent permitted under applicable Law, except to the extent arising due to the negligence or willful misconduct of Landlord but subject to the
waiver set forth in Section 13.04, Tenant hereby waives all claims against and releases Landlord and the Landlord Related Parties from all claims for any injury to or death of persons, damage to property or business loss to the extent resulting
from (a) Force Majeure, (b) acts of third parties, (c) the bursting or leaking of any tank, water closet, drain or other pipe, or (d) the inadequacy or failure of any security or protective services, personnel or equipment.
Nothing herein shall be construed as to diminish the repair and maintenance obligations of Landlord contained elsewhere in this Lease. 

13.02 Insurance. Tenant shall maintain the following coverages in the following amounts throughout the Term (and during any other
periods before or after the Term during which Tenant or any Tenant Related Party enters into or occupies all or any portion of the Premises): 

(a) Commercial General Liability Insurance covering claims of bodily injury, personal injury and property damage arising out of Tenant’s
operations and contractual liabilities, including coverage formerly known as broad form, on an occurrence basis, with minimum primary limits of $1,000,000 each occurrence and $2,000,000 annual aggregate and a minimum excess/umbrella limit of
$5,000,000.00. 

  
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 (b) Property insurance covering (i) Tenant’s Property (as defined below), and
(ii) any Leasehold Improvements in the Premises, whether installed by or for the benefit of Tenant under this Lease or any prior lease or other agreement to which Tenant was a party or otherwise (“Tenant-Insured
Improvements”). Such insurance shall be written on a special cause of loss form for physical loss or damage, for the full replacement cost value (subject to reasonable deductible amounts) without deduction for depreciation of the
covered items and in amounts that meet any co-insurance clauses of the policies of insurance, and shall include coverage for damage or other loss caused by fire or other peril, including vandalism and
malicious mischief, theft, water damage of any type, including sprinkler leakage, bursting or stoppage of pipes, and explosion, and providing business interruption coverage for a period of one year. 

(c) Worker’s Compensation and Employer’s Liability or other similar insurance to the extent required by Law. 

The minimum limits of insurance required to be carried by Tenant shall not limit Tenant’s liability. Such insurance shall
(i) be issued by an insurance company that has an A.M. Best rating of not less than A-VII and (ii) provide that it shall not be canceled or materially changed without thirty (30) days’
prior notice to Landlord, except that ten (10) days’ prior notice may be given in the case of nonpayment of premiums. Tenant’s Commercial General Liability Insurance shall (a) name Landlord, Landlord’s managing agent,
and any other party designated by Landlord (“Additional Insured Parties”) as additional insureds; and (b) be primary insurance as to all claims thereunder and provide that any insurance carried by Landlord is excess and non-contributing with Tenant’s insurance. Landlord shall be designated as a loss payee with respect to Tenant’s property insurance allocable to any Tenant-Insured Improvements. Tenant shall
deliver to Landlord, on or before the Term Commencement Date and at least fifteen (15) days before the expiration dates thereof, certificates from Tenant’s insurance company on the forms currently designated “ACORD 28” (Evidence
of Commercial Property Insurance) and “ACORD 25-S” (Certificate of Liability Insurance) or the equivalent. Tenant shall give Landlord at least thirty (30) days’ advance written notice
of any cancellation, termination or lapse of insurance.
 Tenant shall maintain such increased amounts of the insurance required to be
carried by Tenant under this Section 13.02, and such other types and amounts of insurance covering the Premises and Tenant’s operations therein, as may be reasonably requested by Landlord, but not in excess of the amounts and types of
insurance then being required by landlords of buildings comparable to and in the vicinity of the Building. 
 Landlord shall maintain all-risk property insurance, including flood insurance, insuring the full replacement cost of the Premises (excluding Tenant-Insured Improvements), the Building, and the Property, including the Common
Areas. Landlord shall also carry, during the Term, Commercial General Liability Insurance with respect to the Common Areas, with contractual liability insurance, in a combined single limit of not less than $2,000,000 per occurrence for bodily
injury, personal injury and property damage and a minimum excess/umbrella limit of $5,000,000.00. 
 13.03 Tenant’s
Property. All furnishings, fixtures, equipment, and other personal property and effects of Tenant and of all persons claiming through Tenant (including, without limitation, Tenant’s Roof Equipment, as defined in Exhibit F),
which from time to time may be on the Premises or elsewhere in the Building or in transit thereto or therefrom (collectively, “Tenant’s Property”) shall be at the sole risk of Tenant to the maximum extent permitted by law and
shall be kept insured by Tenant throughout the Term (and during any other periods before or after the Term during which Tenant or any Tenant 

  
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Related Party enters into or occupies all or any portion of the Premises) at Tenant’s expense in accordance with Section 13.02. Tenant’s Property expressly includes all
business fixtures and equipment, including without limitation any security or access control systems installed for the Premises, filing cabinets and racks, removable cubicles and partitions, kitchen equipment, computers and related equipment, raised
flooring, supplemental cooling equipment, audiovisual and telecommunications equipment, non-building standard signage, and other tenant equipment installations, in each case including related conduits,
cabling, and brackets or mounting components therefor and any connectors to Base Building systems and in each case whether installed or affixed in or about the Premises, in building core areas, or elsewhere in the Building. 

13.04 Waiver of Subrogation. Each party waives, and shall cause its insurance carrier to waive, any right of recovery against the
other for any loss of or damage to property which loss or damage is (or, if the insurance required hereunder had been carried, would have been) covered by insurance. For purposes of this Section 13.04, any deductible or self-insured
retention with respect to a party’s insurance shall be deemed covered by, and recoverable by such party under, valid and collectable policies of insurance. 
  

	14.	 Casualty Damage. 

14.01 Casualty. If all or any portion of the Premises becomes untenantable or all or any material portion of the Building necessary
for access to or beneficial use of the Premises shall be damaged by fire or other casualty (collectively a “Casualty”), then Landlord, with reasonable promptness, shall cause a licensed general contractor reasonably selected by
Landlord to provide Landlord with a written estimate of the amount of time required, using standard working methods, to substantially complete the repair and restoration of the Premises (exclusive of Tenant’s Property and the Tenant-Insured
Improvements) and any Common Areas necessary to provide access to or beneficial use of the Premises to substantially their condition prior to the Casualty to the extent reasonably practicable (subject to compliance with Laws) (“Completion
Estimate”). Landlord shall promptly forward a copy of the Completion Estimate to Tenant. If the Completion Estimate indicates that the Premises or any Common Areas necessary to provide access to or beneficial use of the Premises
cannot be restored to substantially their condition prior to the Casualty to the extent reasonably practicable (subject to compliance with Laws) within two hundred seventy (270) days from the date of the Casualty, then either party shall have
the right to terminate this Lease upon written notice to the other within thirty (30) days after Tenant’s receipt of the Completion Estimate. Tenant, however, shall not have the right to terminate this Lease in accordance with this
Section 14.01 if the Casualty was caused by the negligence or intentional misconduct of Tenant or any Tenant Related Parties. In addition, Landlord, by notice to Tenant within sixty (60) days after the date of the Casualty, shall have
the right to terminate this Lease if: (1) the Premises have been materially damaged during the last twelve (12) months of the Term; (2) any Mortgagee requires that all or a material portion of the insurance proceeds be applied to the
payment of the mortgage debt owed to such Mortgagee; or (3) a material uninsured loss to the Building or Premises occurs. If this Lease is terminated by either party on account of any Casualty as provided in this Article 14, then Tenant shall
pay to Landlord (by assignment or otherwise) an amount equal to the insurance proceeds actually received by Tenant under the policy(ies) referred to in Section 13.02(b) on account of the damage to or loss of the Leasehold Improvements in the
Premises less a reasonable allocation of Tenant’s actual out-of-pocket third party costs, if any, to adjust and collect such proceeds; however, from any such
proceeds actually received by Tenant, Tenant shall be entitled to retain an amount equal to the unamortized portion (amortized over the initial Term on a straight-line basis) of the hard costs paid by Tenant to perform any Alterations (excluding,
however, any amounts paid by Landlord to perform the Initial Tenant Work). 

  
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 14.02 Restoration. If this Lease is not terminated in accordance with
Section 14.01, Landlord shall promptly and diligently, subject to reasonable delays for insurance adjustment or other matters beyond Landlord’s reasonable control, restore the Premises and Common Areas necessary to provide access to or use
of the Premises (but excluding Tenant’s Property and the Tenant-Insured Improvements), subject to the following provisions. Such restoration shall be to substantially the same condition that existed prior to the Casualty, except for
modifications required by Law or any other modifications to the Common Areas as Landlord may reasonably elect. In no event shall Landlord be required to spend more for the restoration of the Premises, Building and Common Areas than the proceeds
received by Landlord from Landlord’s insurance policies together with deductibles thereon, provided, however, if Landlord does not elect to fund any such deficiency, Landlord shall promptly notify Tenant and Tenant or Landlord may elect to
terminate this Lease. Landlord shall not be liable for any inconvenience to Tenant or injury to Tenant’s business resulting in any way from the Casualty or the repair thereof. Provided that Tenant is not in Default, during any period of time
that all or a portion of the Premises is rendered untenantable, inaccessible or unusable, as applicable, as a result of a Casualty, the Rent shall abate for the portion of the Premises that is untenantable, inaccessible or unusable and not used by
Tenant; provided, however, the rent abatement period under the preceding sentence shall end on the earlier of ninety (90) days after Landlord has completed Landlord’s restoration work required herein or the date that Tenant recommences
business operations from that portion of the Premises. Promptly following the completion of Landlord’s restoration of the Premises, Building and the Common Areas as required herein and notification from Landlord of such completion, or upon
notification from Landlord that Tenant may access the Premises for the concurrent performance of restoration work by each party, Tenant shall restore the Tenant-Insured Improvements to substantially their condition prior to the Casualty (except for
modifications required by Law or otherwise elected by Tenant to reflect Tenant’s business) and in a good and workmanlike manner with reasonable speed and diligence. In no event shall Tenant be required to spend more for the restoration of the
Tenant-Insured Improvements than the proceeds received by Tenant from Tenant’s insurance policies or the amount Tenant would have received had Tenant carried the insurance and with limits required in this Lease. 

14.03 Tenant’s Additional Termination Right. Notwithstanding the foregoing, if Landlord does not substantially complete the repair
and restoration work required to be performed by Landlord as provided in Section 14.02 above within the later of (a) two (2) months after the expiration of the estimated amount of time set forth in the applicable Completion Estimate, and
(b) two hundred seventy (270) days after the date of the Casualty, as each such period of time shall be extended to the extent of any delays due to Force Majeure or delays caused by any Tenant Related Parties (such extension shall not
exceed nine (9) months in the aggregate on account of Force Majeure delays), then Tenant may terminate this Lease by written notice thereof to Landlord within thirty (30) days after the expiration of such period of time, as the same may be
extended, unless Landlord completes its restoration obligations hereunder within such thirty (30) day period, in which event such termination notice shall be null and void and this Lease shall continue in full force and effect. 

 

	15.	 Condemnation. 

Either party may terminate this Lease if any material part of the Premises is taken or condemned for any public or quasi-public use under Law, by eminent
domain or private purchase in lieu thereof (a “Taking”). Landlord shall also have the right to terminate this Lease if there is a Taking of any portion of the Building or Property which would have a material adverse effect on
Landlord’s ability to profitably operate the remainder of the Building. The terminating party shall provide written notice of termination to the other party within forty five (45) days after it first receives notice of the
Taking. The termination shall be effective as of the effective date of any order granting possession to, or vesting legal title in, the condemning authority. If this Lease is not terminated, Base Rent and Tenant’s Proportionate Share
shall be appropriately adjusted to account for any reduction in the square footage of the Building or Premises. 

  
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All compensation awarded for a Taking shall be the property of Landlord. The right to receive compensation or proceeds are expressly waived by Tenant, provided, however, Tenant may file a
separate claim for Tenant’s Property and Tenant’s reasonable relocation expenses, provided the filing of the claim does not diminish the amount of Landlord’s award. If only a part of the Premises is subject to a Taking and this
Lease is not terminated, Landlord, with reasonable diligence, will restore the remaining portion of the Premises as nearly as practicable to the condition immediately prior to the Taking. 

 

	16.	 Events of Default. 

16.01 Default. In addition to any other Default specifically described in this Lease, each of the following occurrences shall be a
“Default”: (a) Tenant’s failure to pay any portion of Rent when due, if the failure continues for five (5) Business Days after Landlord gives written notice to Tenant of the applicable failure by Tenant to timely pay
such portion of the Rent (“Monetary Default”); (b) Tenant’s failure (other than a Monetary Default) to comply with any term, provision, condition or covenant of this Lease, if the failure is not cured within thirty
(30) days after written notice to Tenant provided, however, if Tenant’s failure to comply cannot reasonably be cured within such thirty-(30)-day period, Tenant shall be allowed additional time (not
to exceed an additional ninety (90) days) as is reasonably necessary to cure the failure so long as Tenant begins the cure within such thirty-(30)-day period and diligently pursues the cure to completion;
(c) Tenant effects or permits a Transfer without Landlord’s required approval or otherwise in violation of Section 11 of this Lease; (d) Tenant becomes insolvent, makes a transfer in fraud of creditors, makes an assignment for
the benefit of creditors, or forfeits or loses its right to conduct business; (e) the leasehold estate is taken by process or operation of Law; or (f) if a receiver, guardian, conservator, trustee in bankruptcy or similar officer shall be
appointed by a court of competent jurisdiction to take charge of all or any part of Tenant’s property and such appointment is not discharged within ninety (90) days thereafter, or if a petition including, without limitation, a petition for
reorganization or arrangement is filed by Tenant under any bankruptcy law or is filed against Tenant and the same shall not be dismissed within ninety (90) days from the date upon which it is filed. In addition, if Landlord provides Tenant with
notice of Tenant’s failure to comply with any specific provision of this Lease on two (2) separate occasions during any twelve-(12)-month period, any subsequent violation of such provision within such twelve-(12)-month period shall, at
Landlord’s option, constitute a Default by Tenant without the requirement of any further notice or cure period as provided above. All notices sent under this Section shall be in satisfaction of, and not in addition to, any notice required by
Law. 
 16.02 Remedies. Upon the occurrence of any Default, Landlord may, immediately or at any time thereafter, elect to
terminate this Lease by notice of termination, by entry, or by any other means available under Law and may recover possession of the Premises as provided herein. Upon termination by notice, by entry, or by any other means available under Law,
Landlord shall be entitled immediately, in the case of termination by notice or entry, and otherwise in accordance with the provisions of Law to recover possession of the Premises from Tenant and those claiming through or under the Tenant. Such
termination of this Lease and repossession of the Premises shall be without prejudice to any remedies which Landlord might otherwise have for arrears of rent or for a prior breach of the provisions of this Lease. Landlord may, without notice,
store Tenant’s personal property (and those of any person claiming under Tenant) at the expense and risk of Tenant or, if Landlord so elects, Landlord may sell such personal property at public auction or auctions or at private sale or sales
after thirty (30) days’ notice to Tenant and apply the net proceeds to the earliest of installments of rent or other charges owing Landlord. Tenant agrees that a notice by Landlord alleging any default shall, at Landlord’s option
(the exercise of such option shall be indicated by the inclusion of the words “notice to quit” in such notice), constitute a statutory notice to quit. If Landlord exercises its option to designate a notice of default hereunder as a
statutory notice to quit, any grace periods provided for herein shall run concurrently with any statutory notice periods. Tenant further agrees that it shall not interpose any counterclaim or set-off in
any summary proceeding or in any action based in whole or in part on non-payment of Rent, unless Tenant would have no right to commence an independent proceeding to seek to recover on account of such claim.

  
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 16.03 Reimbursement of Expenses. In the case of termination of this Lease
pursuant to this Section 16, Tenant shall reimburse Landlord for all reasonable and documented expenses arising out of such termination, including without limitation, all reasonable and documented costs incurred in collecting amounts due from
Tenant under this Lease (including reasonable attorneys’ fees, costs of litigation and the like); all reasonable and documented expenses incurred by Landlord in attempting to relet the Premises or parts thereof (including advertisements,
brokerage commissions, tenant allowances, costs of preparing space, and the like); and all of Landlord’s then unamortized costs of any work allowances provided to Tenant for the Premises. The reimbursement from Tenant shall be due and
payable promptly from time to time after Tenant’s receipt of a reasonably detailed invoice thereof, without regard to whether the expense was incurred before or after the termination. 

16.04 Damages. Landlord may elect by written notice to Tenant within one year following such termination to be indemnified for loss
of rent by a lump sum payment representing the then present value of the amount of rent and additional charges which would have been paid in accordance with this Lease for the remainder of the Term minus the then present value of the aggregate fair
market rent and additional charges payable for the Premises for the remainder of the Term (if less than the rent and additional charges payable hereunder), estimated as of the date of the termination, and taking into account reasonable projections
of vacancy and time required to re-lease the Premises. (For the purposes of calculating the rent which would have been paid hereunder for the lump sum payment calculation described herein, the last full
year’s Additional Rent under Section 4 is to be deemed constant for each year thereafter. The Federal Reserve discount rate (or equivalent) shall be used in calculating present values.) Should the parties be unable to agree on a
fair market rent, the matter shall be submitted, upon the demand of either party, to the Boston, Massachusetts office of the American Arbitration Association, with a request for arbitration in accordance with the rules of the American Arbitration
Association by a single arbitrator who shall be an MAI appraiser with at least seven (7) years’ experience as an appraiser for first-class office, lab and R&D buildings in the Seaport District. The parties agree that a decision of
the arbitrator shall be conclusive and binding upon them. If and for so long as Landlord does not make the election provided for in this Section 16.04 above, Tenant shall indemnify Landlord for the loss of rent by a payment at the end of
each month which would have been included in the Term, representing the excess of the rent which would have been paid in accordance with this Lease (i.e., Base Rent and Additional Rent that would have been payable to be ascertained monthly) over the
rent actually derived from the Premises by Landlord for such month (the amount of rent deemed derived shall be the actual amount less any portion thereof attributable to Landlord’s reletting expenses described in Section 16.03 which have
not been reimbursed by Tenant thereunder).
 In lieu of the damages, indemnity, and full recovery by Landlord of the sums payable under the
foregoing provisions of this Section 16.04, Landlord may, by written notice to Tenant within six (6) months after termination under any of the provisions contained in Section 16 and before such full recovery, elect to recover, and
Tenant shall thereupon pay, as liquidated final damages under this Section 16.04 (excepting any amounts of reimbursement under Section 16.03 with respect to clause (iii) below), an amount equal to (i) the aggregate of the Base
Rent and Additional Rent for the twelve-month period ending one year after the termination date (or, if lesser, for the balance of the Term had it not been terminated) if the terms of this Lease had been fully complied with by Tenant, plus
(ii) the amount of Base Rent and Additional Rent of any kind accrued and unpaid at the time of termination, and minus (iii) the amount of any recovery by Landlord under the foregoing provisions of this Section 16 up to the time of
payment of such liquidated damages (but reduced by any amounts of reimbursement under Section 16.03). The amount under clause (i) represents a reasonable forecast of the minimum damages expected to occur in the event of a breach, taking
into account the uncertainty, time and cost of determining elements relevant to actual damages, such as fair market rent, time and costs that may be required to re-lease the Premises, and other factors. 

  
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 Landlord agrees to use reasonable efforts to relet the Premises after Tenant vacates the
same in the event this Lease is terminated based upon a Default by Tenant hereunder. Such obligation to relet the Premises shall be subject to the reasonable requirements of Landlord to lease to high quality tenants on such terms as Landlord may
from time to time deem appropriate and to develop the Building in a harmonious manner with an appropriate mix of uses, tenants, floor areas and terms of tenancies, and the like, and Landlord shall not be obligated to relet the Premises to any party
to whom Landlord or its affiliate may desire to lease other available space in the Building. 
 16.05 Curative Action. If Tenant is in
Default of any of its non-monetary obligations under this Lease, Landlord shall have the right, but not the obligation, to perform any such obligation, with five (5) days’ prior written notice
(except in the case of any dangerous condition or emergency, in whch case no notice shall be required). Tenant shall reimburse Landlord for the cost of such performance upon demand. 

16.06 Claims in Bankruptcy. Nothing herein shall limit or prejudice the right of Landlord to prove and obtain in a proceeding for
bankruptcy, insolvency, arrangement or reorganization, by reason of the termination, an amount equal to the maximum allowed by a statute or law in effect at the time when, and governing the proceedings in which, the damages are to be proved, whether
or not the amount is greater to, equal to, or less than the amount of the loss or damage which Landlord has suffered. 
 16.07 Late
Charges and Fees. If Tenant does not pay any Rent when due hereunder, then without notice and in addition to all other remedies hereunder, Tenant shall pay to Landlord an administration fee in the amount of four percent (4%) of the unpaid
Rent, plus interest on such unpaid amount at the rate of one and one half percent (1.5%) per month from the date such amount was due until the date paid (which interest, as accrued to date, shall be payable from time to time upon Tenant’s
receipt of an invoice thereof); provided, however, in no event shall such interest exceed the maximum amount permitted to be charged by applicable law. Notwithstanding the foregoing, Tenant shall be entitled to a grace period of five (5)
days for the first two (2) late payments of Rent in any twelve-(12)-month period prior to the imposition of the foregoing amounts. In addition, Tenant shall pay to Landlord a reasonable fee for any checks returned by Tenant’s bank for
any reason. 
 16.08 Enforcement Costs. Tenant shall pay to Landlord, as Additional Rent, the costs and expenses, including
reasonable attorneys’ fees, incurred in enforcing any obligations of Tenant under this Lease with which Tenant has failed to comply. 

16.09 General. The repossession or re-entering of all or any part of the Premises shall not
relieve Tenant of its liabilities and obligations under this Lease. No right or remedy of Landlord shall be exclusive of any other right or remedy, and each right and remedy shall be cumulative and in addition to any other right and remedy now
or subsequently available to Landlord at law or in equity. Without limiting the generality of the foregoing, in addition to the other remedies provided in this Lease, Landlord shall be entitled to the restraint by court order of the violation or
attempted or threatened violation of any of the provisions of this Lease or of applicable Law or to a decree compelling specific performance of any such provisions. 

  
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	17.	 Limitation of Liability. 

17.01 Landlord’s Liability. Tenant agrees from time to time to look only to Landlord’s interest in the Property
(including, without limitation, uncollected rent, property insurance, condemnation and sale proceeds prior to distribution thereof, but subject to the rights of any Mortgagee and to Landlord’s right to use any insurance and condemnation
proceeds for the purposes of repairing and restoring the Building and the Property) for satisfaction of any claim against Landlord hereunder or under any other instrument related to the Lease (including any separate agreements among the parties and
any notices or certificates delivered by Landlord) and not to any other property or assets of Landlord. If Landlord from time to time transfers its interest in the Building (or part thereof which includes the Premises), then from and after each
such transfer, so long as such transferee shall have assumed all of Landlord’s obligations as under this Lease, Tenant shall look solely to the interests in the Building of each of Landlord’s transferees for the performance of all of the
obligations of Landlord hereunder (or under any related instrument). The obligations of Landlord shall not be binding on any direct or indirect partners (or members, trustees or beneficiaries) of Landlord or of any successor, individually, but
only upon Landlord’s or such successor’s interest described above. If Landlord shall refuse or fail to provide any consent or approval for any matter for which Landlord’s consent or approval is required under this Lease or is
otherwise requested by Tenant, Landlord shall not be liable for damages as a result thereof, and Tenant’s sole remedy to enforce any alleged obligation of Landlord to provide such consent or approval shall be an action for specific performance,
injunction, or declaratory relief.
 17.02 Assignment of Rents. 

(a) With reference to any assignment by Landlord of Landlord’s interest in this Lease, or the rents payable hereunder, conditional in
nature or otherwise, which assignment is made to the holder of a mortgage on property which includes the Premises, Tenant agrees that the execution thereof by Landlord, and the acceptance thereof by the holder of such mortgage shall never be treated
as an assumption by such holder of any of the obligations of Landlord hereunder unless such holder shall, by notice sent to Tenant, specifically otherwise elect and, except as aforesaid, such holder shall be treated as having assumed Landlord’s
obligations hereunder only upon foreclosure of such holder’s mortgage and the taking of possession of the Premises. 
 (b) In no event
shall the acquisition of Landlord’s interest in the Property by a purchaser which, simultaneously therewith, leases Landlord’s entire interest in the Property back to the seller thereof be treated as an assumption by operation of law or
otherwise, of Landlord’s obligations hereunder, but Tenant shall look solely to such seller–lessee, and its successors from time to time in title, for performance of Landlord’s obligations hereunder. In any such event, this Lease
shall be subject and subordinate to the lease to such purchaser. For all purposes, such seller–lessee, and its successors in title, shall be the Landlord hereunder unless and until Landlord’s position shall have been assumed by such
purchaser–lessor. 
 (c) Except as provided in paragraph (b) of this Section 17.02, in the event of any transfer of title to
the Property by Landlord, Landlord shall thereafter be entirely freed and relieved from the performance and observance of all covenants and obligations hereunder; provided, however, Landlord shall be released only to the extent such successor
landlord shall have assumed all of Landlord’s obligations under this Lease. Tenant hereby agrees to enter into such reasonable agreements or instruments as may, from time to time, be requested in confirmation of the foregoing, so long as
the same provide that Tenant’s rights hereunder shall continue undisturbed so long as there is no Default of Tenant in existence and continuing. 

17.03 Landlord Default. In the event Tenant alleges that Landlord is in default under any of Landlord’s obligations under this
Lease, Tenant agrees to give any Mortgagee (as defined in Section 20), by registered mail, a copy of any notice of default which is served upon the Landlord, provided that prior to such notice, Tenant has been notified, in writing (whether by
way of notice of an assignment of lease, request to execute an estoppel letter, or otherwise), of the address of any such Mortgagee. Tenant 

  
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further agrees that if Landlord shall have failed to cure such default within thirty (30) days after written notice thereof by Tenant (provided, if the nature of Landlord’s failure is
such that more than thirty (30) days are reasonably required in order to cure, Landlord shall not be in default if Landlord commences to cure such failure within such thirty (30) day period, and thereafter diligently pursues to cure such
failure to completion), such Mortgagee shall have an additional thirty (30) days within which to cure such default, but shall not be obligated to cure such default. If such default cannot be cured within such
thirty-(30)-day period, then such Mortgagee shall have such additional time as may be necessary to cure such default, if prior to the end of such thirty-(30)-day period
such Mortgagee has commenced and is diligently pursuing such cure or the remedies under the Mortgage necessary for Mortgagee to be able to effect such cure, in which event Tenant shall have no right with respect to such default while such cure and
remedies are being diligently pursued by such Mortgagee. Except as may be expressly provided in this Lease, in no event shall Tenant have the right to terminate the Lease nor shall Tenant’s obligation to pay Base Rent or other charges
under this Lease abate based upon any default by Landlord of its obligations under the Lease.
 17.04 Waiver of Consequential Damages.
In no event shall Landlord or any Landlord Related Party ever be liable to Tenant for loss of profits, loss of business, or indirect or consequential damages suffered by Tenant from whatever cause. Notwithstanding anything to the contrary contained
in this Lease, except for any liability of Tenant expressly permitted under Article 18 of this Lease, Tenant shall not be liable to Landlord or any Landlord Related Party for any loss of rent, loss of business, indirect or consequential damages
incurred by Landlord from any cause whatsoever, including the negligence or fault of any of Tenant or the Tenant Related Parties. 
  

	18.	 Holding Over. 

If Tenant fails to surrender all or any part of the Premises at the expiration or earlier termination of this Lease, any such occupancy of all or any part of
the Premises after such expiration or termination shall be that of a tenancy at sufferance. Any such occupancy after such expiration or termination shall be subject to all the terms and provisions of this Lease, except that Tenant shall pay an
amount for such occupancy (on a per month basis without reduction for partial months during the holdover) equal to the sum of one hundred fifty percent (150%) of the Base Rent due for the month immediately preceding the holdover and one hundred
percent (100%) of any Additional Rent due for the month immediately preceding the holdover. No holdover by Tenant or payment by Tenant after the expiration or earlier termination of this Lease shall be construed to extend the Term or prevent
Landlord from immediate recovery of possession of the Premises by summary proceedings or otherwise. In addition, if as a result of such holdover, Landlord is unable to deliver possession of space to a new tenant or to perform improvements therein
for a new tenant due to Tenant’s failure to timely vacate all or part of the Premises, Tenant shall be liable to Landlord for all damages and losses that Landlord suffers from the holdover. 

 

	19.	 Surrender of Premises. 

At the expiration or earlier termination of this Lease or Tenant’s right of possession hereunder, Tenant shall remove all Required Removables (if any)
under Section 8.03, remove all Tenant’s Property from the Premises, remove all signage installed by or on behalf of Tenant, and quit and surrender the Premises to Landlord, broom clean, and in good order, condition and repair, reasonable
wear and tear, taking by eminent domain, damage by Casualty and damage and elements of the Premises which Landlord is obligated to repair hereunder excepted. Tenant shall repair any damage caused by the installation or removal of Tenant’s
Property or Required Removables or Tenant’s signage. If Tenant fails to remove any of Tenant’s Property or to restore or repair the Premises to the required condition as provided herein upon the expiration of the Term of this Lease
(or, as applicable, within two (2) days after any earlier termination of this Lease or Tenant’s right to possession hereunder), then Landlord, at Tenant’s sole cost 

  
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and expense, shall be entitled, but not obligated, to remove and store Tenant’s Property and/or perform such restoration or repair of the Premises. Landlord shall not be responsible for
the value, preservation, or safekeeping of Tenant’s Property, and Tenant shall pay to Landlord, upon demand, the expenses and storage charges so incurred. If Tenant fails to remove Tenant’s Property from the Premises or storage,
within thirty (30) days after notice, Landlord may deem all or any part of Tenant’s Property to be abandoned and, at Landlord’s option, subject to applicable Laws, title to Tenant’s Property shall vest in Landlord or Landlord may
dispose of Tenant’s Property in any manner Landlord deems appropriate. 
  

	20.	 Subordination; Estoppel Certificate. 

20.01 Subordination to Ground Lease. This Lease is and shall be subject and subordinate to the Amended, Restated and Consolidated Ground
Lease between the Massachusetts Port Authority (as ground lessor) (the “Ground Lessor” or the “Authority”), and Landlord, as successor in interest to Boston Harbor Industrial Development LLC (as ground lessee),
dated as of March 31, 2010, notice of which is recorded with the Suffolk County Registry of Deeds in Book 46261, Page 23, and filed with the Suffolk Registry District of the Land Court as Document No. 776685 (the “Ground
Lease”). 
 (a) Ground Lessor Consent. Notwithstanding anything to the contrary, Tenant acknowledges that the terms and
provisions of this Lease are subject to the prior written consent of Ground Lessor. Accordingly, the effectiveness of this Lease is expressly contingent upon Landlord obtaining Ground Lessor’s consent on or before the date that is sixty
(60) days after the Effective Date. Landlord shall use good faith efforts to obtain Ground Lessor’s consent within such sixty (60) day period and shall notify Tenant promptly upon obtaining Ground Lessor’s consent. If Ground
Lessor disapproves of this Lease, Landlord or Tenant may terminate this Lease by delivering written notice thereof to the other party, whereupon this Lease shall become null and void. If Landlord is unable to obtain Ground Lessor’s consent on
or before the date that is sixty (60) days after the Effective Date, then Tenant may terminate this Lease by delivering written notice thereof to Landlord, whereupon this Lease shall become null and void. 

(b) Ground Lease Terminates Prior to Lease. In the event the Ground Lease is terminated prior to the termination of this Lease, Ground
Lessor, at its option, may require Tenant to attorn to Ground Lessor as landlord and waive any right Tenant has to terminate this Lease, or surrender possession to the Premises as a result of the termination of the Ground Lease, at which time this
Lease shall terminate simultaneously with the Ground Lease. Notwithstanding the foregoing or anything to the contrary contained in this Lease, Landlord shall use commercially reasonable efforts to secure for Tenant a
Non-Disturbance and Attornment Agreement in the form attached hereto as Exhibit I (the “NDA”), which may be recorded by Tenant at Tenant’s sole expense. As used in the previous
sentence, “commercially reasonable efforts” shall mean that, within five (5) business days after the full execution of this Lease, Landlord shall deliver this Lease to Ground Lessor and request that Ground Lessor execute the NDA, and
thereafter Landlord shall diligently pursue and use good faith efforts to obtain the executed NDA from Ground Lessor and shall keep Tenant regularly apprised of Landlord’s progress. If Landlord has not delivered to Tenant the NDA within ninety
(90) days after the Effective Date, Tenant shall have the right to terminate this Lease by delivering written notice to Landlord. 
 (c)
Tenant Receives Notice of Landlord Default. In the event Tenant receives notice from Ground Lessor that an “Event of Default” has occurred under the terms of the Ground Lease, Tenant shall thereafter be obligated to pay all Base
Rent, Additional Rent and all other sums due hereunder to Ground Lessor or as Ground Lessor may direct. 

  
 25 

 (d) Compliance with Massachusetts Port Authority’s Non-discrimination and Affirmative Action Requirements. Tenant shall: 
 i. Not discriminate against
any person, employee, or applicant for employment because of that person’s membership in any legally protected class, including, but not limited to, their race, color, gender, religion, creed, national origin, ancestry, age being greater than
forty years, sex, sexual orientation, disability, genetic information, or Vietnam-era veteran status in the use of the Premises, including the hiring and discharging of employees, the provision or use of
services, the selection of suppliers and contractors, in the subleasing or refusing to sublease any portion of the Premises or providing or refusing to provide any services or use of any facility. In addition, Tenant its successors in interest,
subtenants, licensees, managers, operators, and assigns shall not discriminate against any person, employee, or applicant for employment who is a member of, or applies to perform service in, or has an obligation to perform service in a uniformed
military service of the United States, including the National Guard, on the basis of that membership, application or obligation. 
 ii.
Conspicuously post notices to employees and prospective employees setting forth the Fair Employee Practices Law of the Commonwealth of Massachusetts. 

iii. Comply with all applicable federal, state and local laws, rules, regulations and orders and the Authority’s rules and orders
(provided that, with respect to the Authority’s rules and orders, copies of such rules and orders have been provided to Tenant) pertaining to Civil Rights and Equal Opportunity, including but not limited to Executive Orders 11246 and 11478 as
amended, unless otherwise exempt therefrom. 
 20.02 Subordination to Mortgages. This Lease is and shall be subject and
subordinate to the lien of any mortgage(s), deed(s) of trust, deeds to secure debt, ground lease(s) other than the Ground Lease, or other lien(s) now or subsequently arising upon the Premises, the Building or the Property, and to all renewals,
modifications, refinancings, and extensions thereof (collectively referred to as a “Mortgage”). Landlord represents and warrants that there are no existing mortgages or ground leases encumbering the Property as of the Effective
Date, excepting the Ground Lease and the Mortgage described in the form attached hereto as Exhibit H. The party having the benefit of a Mortgage shall be referred to as a “Mortgagee”. This clause shall be self-operative, but
upon request from Landlord or a Mortgagee, Tenant shall execute a subordination agreement in favor of the Mortgagee and Tenant in such Mortgagee’s standard form, with such commercially reasonable changes as Tenant may request that are
acceptable to Mortgagee for other comparable leases in the Building. As an alternative, any Mortgagee shall have the right at any time to subordinate its Mortgage to this Lease. Upon request, Tenant, without charge, shall attorn to any
successor to Landlord’s interest in this Lease. In the event Mortgagee enforces it rights under the Mortgage, Tenant, at Mortgagee’s option, will attorn to Mortgagee or its successor; provided, however, that Mortgagee or its successor
shall not be liable for or bound by (i) any payment of any Rent installment which may have been made more than thirty (30) days before the due date of such installment, (ii) any act or omission of or default by Landlord under this
Lease (but Mortgagee, or such successor, shall be subject to the continuing obligations of landlord under the Lease arising from and after such succession, but only to the extent of Mortgagee’s, or such successor’s, interest in the
Property as provided in Section 17), (iii) any credits, claims, setoffs or defenses which Tenant may have against Landlord, or (iv) any obligation under this Lease to maintain a fitness facility at the Building, if any. Tenant,
upon the reasonable request by Mortgagee or such successor in interest, shall execute and deliver an instrument or instruments confirming such attornment. Landlord shall use reasonable efforts to provide Tenant with a
non-disturbance, subordination, and attornment agreement in favor of Tenant from any future Mortgagee in such Mortgagee’s standard form, with such commercially reasonable changes as Tenant may reasonably
request that are reasonably acceptable to Mortgagee for other comparable leases in the Building. Landlord shall obtain from the existing Mortgagee, a subordination, non-disturbance and attornment
agreement in the form attached hereto as Exhibit H (an “SNDA”). If Landlord has not delivered to Tenant the SNDA within ninety (90) days after the Effective Date, Tenant shall have the right to terminate this Lease by
delivering written notice to Landlord. 

  
 26 

 20.03 Modification of Lease. If any Mortgagee requires a modification of this
Lease, which modification will not cause an increased cost or expense to Tenant or in any other way adversely change the rights and obligations of Tenant hereunder, Tenant agrees that this Lease may be so modified and agrees to execute whatever
documents are reasonably required therefor and to deliver the same to Landlord within ten (10) Business Days following a request therefor. At the request of Landlord or any Mortgagee, Tenant agrees to execute a short form of this Lease and
deliver the same to Landlord within ten (10) Business Days following the request therefor. 
 20.04 Estoppel
Certificate. Tenant shall, within ten (10) Business Days after receipt of a written request, execute and deliver a commercially reasonable estoppel certificate addressed to Landlord and any parties reasonably requested by Landlord,
such as a current or prospective Mortgagee or purchaser of the Building. Without limitation, such estoppel certificate may include a certification as to the status of this Lease and any particular obligations thereunder, the existence of any
defaults, and the amount of Rent that is then due and payable. 
 20.05 Tenant Information. Upon Landlord’s request from
time to time (but not more than once in any twelve (12) month period, except in connection with a proposed sale, financing or re-financing of the Building, or following a Default, in which cases the
foregoing limitation shall not apply), Tenant shall provide Tenant’s most recently prepared financial statements (typically through the fiscal quarter immediately prior to such request). Financial statements for each fiscal year shall be
prepared and certified by a certified public accountant; financial statements for each quarter shall be prepared and certified by Tenant’s chief financial officer. Notwithstanding the foregoing, in no event shall Tenant be required to provide
any financial information to Landlord which Tenant does not otherwise prepare (or cause to be prepared) for its own purposes. If requested by Tenant, such financial statements shall be furnished pursuant to a confidentiality agreement in a form
reasonably provided by Landlord and reasonably acceptable to Tenant for such purpose. 
  

	21.	 Miscellaneous. 

21.01 Measurement of Floor Area. Landlord and Tenant stipulate and agree that the Rentable Floor Area of the Premises originally leased
to Tenant shall be conclusively deemed to be as specified in Section 1 and that the Rentable Floor Area of the Building is as specified in Section 1 as of the date hereof. Any change in the Rentable Floor Area of the Premises on account of
expansion shall be conclusively deemed to be as specified in any applicable expansion provisions under Exhibit F (if any) or in any amendment hereafter executed by Landlord and Tenant in connection with such expansion (if any). Any other
change in the Rentable Floor Area of the Premises on account of casualty, condemnation, or the like shall be determined in accordance with the measurement standard that was originally used to determine the stipulated Rentable Floor Area for the
space in question. Any change in the Rentable Floor Area of the Building on account of casualty, condemnation, or the like shall be determined from time to time by Landlord based on area computations supplied by Landlord’s architect, which
determinations shall be conclusive. References in this Lease to floor area measurements and square footage shall mean Rentable Floor Area unless the reference explicitly provides otherwise. 

21.02 Notice of Lease. Tenant shall not record this Lease. Tenant, at Tenant’s cost and expense, shall be entitled to record a
memorandum or notice of lease or other short form lease (each deemed a “notice of lease” hereunder) in accordance with any statutory requirements of the state in which the Building is located, and otherwise subject to
Landlord’s reasonable approval regarding the form and substance of the notice of lease, and Landlord agrees to execute and have the same acknowledged and returned to Tenant promptly following Tenant’s request. Tenant shall record all
necessary documentation to release such notice of lease of record within thirty (30) days following the earlier to occur of (i) the Term Expiration Date, or (ii) termination of this Lease or Tenant’s right to possession under
this Lease. If 

  
 27 

 
Tenant fails to have such notice of lease released within such thirty-(30)-day period, Landlord shall be entitled to take all action as is reasonably
necessary to cause such notice of lease to be released. In such event, Tenant shall reimburse Landlord for any reasonable costs and expenses, including reasonable attorneys’ fees, incurred by Landlord in causing the notice of lease to be
released of record. In no event shall such notice of lease set forth the rent or other charges payable by Tenant under this Lease; and any such document shall expressly state that it is executed pursuant to the provisions contained in this Lease and
is not intended to vary the terms and conditions of this Lease. 
 21.03 Governing Law, Etc. This Lease shall be interpreted and
enforced in accordance with the Laws of the state or commonwealth in which the Building is located and Landlord and Tenant hereby irrevocably consent to the jurisdiction and proper venue of such state or commonwealth. This Lease contains all of
the agreements and understandings between Landlord and Tenant with respect to the Premises and supersedes all prior writings and dealings between them with respect thereto, including all lease proposals, letters of intent and other
documents. Neither party is relying upon any warranty, statement or representation not contained in this Lease. If any term or provision of this Lease shall to any extent be void or unenforceable, the remainder of this Lease shall not be
affected. This Lease may be amended only by a writing signed by all of the parties hereto. The titles are for convenience only and shall not be considered a part of the Lease. Where the phrases “persons acting under Tenant” or
“persons claiming under Tenant” or similar phrases are used, such persons shall include subtenants, sub-subtenants, and licensees, and all employees, agents, independent contractors and invitees of
Tenant or of such other parties. The enumeration of specific examples of or inclusions in a general provision shall not be construed as a limitation of the general provision. If Tenant is granted any extension option, expansion option, or
other right or option, the exercise of such right or option (and notice thereof) must be irrevocable to be effective, time always being of the essence to the exercise of such right or option; and if Tenant purports to condition the exercise of any
option or to vary its terms in any manner, then the option granted shall be void and the purported exercise shall be ineffective. Unless otherwise stated herein, any consent or approval required hereunder may be given or withheld in the sole
absolute discretion of the party whose consent or approval is required. Nothing herein shall be construed as creating the relationship between Landlord and Tenant of principal and agent, or of partners or joint venturers, or any relationship
other than landlord and tenant. Tenant’s covenants contained in this Lease are independent and not dependent, and Tenant hereby waives the benefit of any statute or judicial law to the contrary. Tenant’s covenant to pay Rent is
independent of every other covenant in this Lease. Tenant’s obligation to pay Rent shall not be discharged or otherwise affected by any law or regulation now or hereafter applicable to the Premises or any other restriction on Tenant’s use,
or (except as expressly provided in this Lease) any casualty or taking, or any other occurrence; and no termination or abatement remedy that is not expressly provided for in this Lease for any breach or failure by Landlord to perform any obligation
under this Lease shall be implied or applicable as a matter of law. 
 21.04 Representations. Tenant represents and warrants to
Landlord, and agrees, that each individual executing this Lease on behalf of Tenant is authorized to do so on behalf of Tenant and that Tenant and all beneficial owners of Tenant are not and at no time will be (i) in violation of any Laws
relating to terrorism or money laundering, or (ii) among the individuals or entities with whom U.S. persons or entities are restricted from doing business under regulations of the Office of Foreign Assets Control (“OFAC”) of
the Department of the Treasury (including those named on OFAC’s Specially Designated Nationals and Blocked Persons List for the purpose of identifying suspected terrorists or on the most current list published by the U.S. Treasury Department
Office of Foreign Assets Control at its official website, http://www.treasury.gov/resource-center/sanctions/SDN-List/Pages/default.aspx or any replacement website or other replacement official publication of
such list) or under any statute, executive order (including the September 24, 2001, Executive Order Blocking Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit, or Support Terrorism, known as Executive Order
13224), or other governmental action and Tenant will not Transfer this Lease to, contract with or otherwise engage in any dealings or transactions or be otherwise associated with such persons or entities. 

  
 28 

 Landlord represents it is not (a) a person or entity designated by the U.S. Government
as a Specially Designated National and Blocked Person, designated on the Sectoral Sanctions Identification List or Foreign Sanctions Evader List, maintained by the U.S. Department of Treasury’s Office of Foreign Assets Control; (b) a
person or entity who is otherwise the target of any U.S. economic sanctions program such that a U.S. person or entity cannot deal with or otherwise engage in business transactions involving such person or entity; (c) owned at 50% or higher
level, or acting for or on behalf of, any person or entity identified in clause (a) and/or (b) above; or (d) located, domiciled or residing in a country that is the target of any U.S. economic sanctions program such that the entry
into this Lease would be prohibited under U.S. law. 
 21.05 Waiver of Trial by Jury; No Other Waiver. Landlord and Tenant hereby
waive any right to trial by jury in any proceeding based upon a breach of this Lease. No failure by either party to declare a default immediately upon its occurrence, nor any delay by either party in taking action for a default, nor
Landlord’s acceptance of Rent with knowledge of a default by Tenant, shall constitute a waiver of the default, nor shall it constitute an estoppel. The delivery of keys to Landlord or to Landlord’s property manager shall not operate
as a termination of this Lease or a surrender of the Premises.
 21.06 Time Periods. Whenever a period of time is prescribed for
the taking of an action by Landlord or Tenant (other than the payment of the security deposit or Rent), the period of time for the performance of such action shall be extended by the number of days that the performance is actually delayed due to
strikes, acts of God, shortages of labor or materials, war, terrorist acts, public health emergencies, epidemics, pandemics, governmental mandates or orders, civil disturbances and other causes beyond the reasonable control of the performing party
(“Force Majeure”). 
 21.07 Transfer of the Property. Landlord shall have the right from time to time to
transfer and assign, in whole or in part, all of its rights and obligations under this Lease and in the Building and Property and, upon transfer, Landlord shall be released from any further obligations hereunder to the degree that the transferee
assumes Landlord’s obligations under this Lease and, in such event, and Tenant agrees to look solely to the successor in interest of Landlord for the performance of such obligations, to the extent that any successor pursuant to a voluntary,
third party transfer (but not as part of an involuntary transfer resulting from a foreclosure or deed in lieu thereof) shall have assumed Landlord’s obligations under this Lease from and after the date of the transfer. 

21.08 Submission. The submission of this Lease to Tenant or a summary of some or all of its provisions for examination does not
constitute a reservation of or option for the Premises or an offer to lease, and no legal obligations shall arise with respect to the Premises or other matters herein unless and until such time as this Lease is executed and delivered by Landlord and
Tenant and approved by the holder of any mortgage on the Building having the right to approve this Lease.
 21.09 Brokers. Tenant
represents that it has dealt directly with and only with the Broker (described in Section 1) as a broker, agent or finder in connection with this Lease. Tenant shall indemnify and hold Landlord and the Landlord Related Parties harmless
from all claims of any other brokers, agents or finders claiming to have represented Tenant in connection with this Lease. Landlord hereby agrees to pay all brokerage commissions or finder’s fees (if any) that may be due to the Broker in
connection with this Lease pursuant to its written agreements, if any, with each such Broker. Landlord shall indemnify and hold Tenant and the Tenant Related Parties harmless from all claims of any brokers, agents or finders claiming to have
represented Landlord in connection with this Lease. Any assistance rendered by any agent or employee of Landlord in connection with this Lease or any subsequent amendment or modification or any other document related hereto has been or will be
made as an accommodation to Tenant solely in furtherance of consummating the transaction on behalf of Landlord, and not as agent for Tenant. 

  
 29 

 21.10 Survival. The expiration of the Term, whether by lapse of time,
termination or otherwise, shall not relieve either party of any obligations that accrued prior to or which expressly survive the expiration or termination of this Lease.

21.11 Quiet Enjoyment. This Lease is subject to all easements, restrictions, agreements, and encumbrances of record to the extent
in force and applicable. Landlord covenants that, provided there is no Default of Tenant in existence and continuing, Tenant shall peacefully and quietly have, hold and enjoy the Premises, free from any claim by Landlord or persons claiming
under Landlord, but subject to all of the terms and provisions hereof, provisions of Law, and rights of record to which this Lease is or may become subordinate. This covenant is in lieu of any other so called quiet enjoyment covenant, either
express or implied. This covenant shall be binding upon Landlord and its successors only during its or their respective periods of ownership of the Building. 

21.12 Reservations. This Lease does not grant any rights to light or air over or about the Building. Landlord excepts and
reserves to itself any and all rights not specifically granted to Tenant under this Lease. Landlord reserves the right to make changes to the Property, Building and Common Areas as Landlord deems appropriate, provided the changes do not
materially adversely affect Tenant’s ability to use the Premises for the Permitted Use or reduce the usable square footage of the Premises. Wherever this Lease requires Landlord to provide a customary service or to act in a reasonable manner
(whether in incurring an expense, establishing a rule or regulation, providing an approval or consent, or performing any other act), this Lease shall be deemed also to provide that whether such service is customary or such conduct is reasonable
shall be determined by reference to the practices of owners of buildings that (i) are comparable to the Building in size, age, class, quality and location, and (ii) at Landlord’s option, have been, or are being prepared to be,
certified under the U.S. Green Building Council’s Leadership in Energy and Environmental Design (LEED) rating system or a similar rating system. Landlord shall use commercially reasonable efforts to avoid closing the Building or preventing
access to the Premises, provided that Landlord shall have the right (but not the obligation) to temporarily close the Building if Landlord reasonably determines that there is an imminent danger of significant damage to the Building or of personal
injury to Landlord’s employees or the occupants of the Building. The circumstances under which Landlord may temporarily close the Building shall include, without limitation, electrical interruptions, hurricanes and civil disturbances. A closure
of the Building under such circumstances shall not constitute a constructive eviction nor entitle Tenant to an abatement or reduction of Rent. Notwithstanding the foregoing, in the event that Landlord closes the Building due to an imminent danger of
significant damage to the Building or of personal injury to Landlord’s employees or the occupants of the Building for a reason that is not necessitated by Force Majeure, which closure entirely prevents Tenant from accessing the Premises, then
if such prohibited access continues for more than one (1) Business Day, then commencing on the second Business Day of such prohibited access, Rent shall abate for each day that Tenant is prevented from having any access to the Premises due to
such closure of the Building by Landlord and not due to Force Majeure (it being acknowledged and agreed that there shall be no abatement of Rent in connection with any Force Majeure or in connection with any Building closure where Tenant has minimum
access to the Premises).     
 21.13 REIT Provisions. Tenant and Landlord intend that all amounts payable by
Tenant to Landlord shall qualify as “rents from real property,” and will otherwise not constitute “unrelated business taxable income” or “impermissible tenant services income,” all within the meaning of
Section 856(d) of the Internal Revenue Code of 1986, as amended (the “Code”) and the U.S. Department of Treasury 

  
 30 

 
Regulations promulgated thereunder (the “Regulations”). In the event that Landlord determines that there is any risk that any amount payable under this Lease may not qualify as
“rents from real property” or will otherwise constitute impermissible tenant services income within the meaning of Section 856(d) of the Code and the Regulations, Tenant agrees to (a) cooperate with Landlord, at no material
expense to Tenant, by entering into such amendment or amendments as Landlord deems necessary to qualify all amounts payable under this Lease as “rents from real property,” and (b) permit (and, upon request, to acknowledge in writing)
an assignment of the obligation to provide certain services under the Lease, and, upon request, to enter into direct agreements with the parties furnishing such services (which shall include, but not be limited to, a taxable REIT subsidiary of
Landlord). Notwithstanding the foregoing, Tenant shall not be required to take any action pursuant to the preceding sentence (including acknowledging in writing an assignment of services pursuant thereto) if such action would result in
(i) Tenant incurring more than de minimis additional liability under this Lease, or (ii) more than a de minimis negative change in the quality or level of Building operations or services rendered to Tenant under this Lease. For the
avoidance of doubt: (A) if Tenant does not acknowledge in writing an assignment as described in clause (b) above (it being agreed that Tenant shall not unreasonably withhold, condition or delay such acknowledgment so long as the criteria
in clauses (i) and (ii) hereinabove are satisfied), then Landlord shall not be released from liability under this Lease with respect to the services so assigned; and (B) nothing in this Section shall limit or otherwise affect
Landlord’s ability to assign its entire interest in this Lease to any party as part of a conveyance of Landlord’s ownership interest in the Building. 

21.14 Execution. This Lease may be executed by DocuSign or other electronic means, in one or more counterparts and, when executed
by each party, shall constitute an agreement binding on all parties notwithstanding that all parties are not signatories to the original or the same counterpart provided that all parties are furnished a copy or copies thereof reflecting the
signature of all parties. Transmission of a facsimile or by email of a pdf copy of the signed counterpart of the Lease shall be deemed the equivalent of the delivery of the original, and any party so delivering a facsimile or pdf copy of the signed
counterpart of the Lease by email transmission shall in all events deliver to the other party an original signature promptly upon request. 

21.15 Prevailing Party. If any dispute arises between the parties hereto concerning the meaning or interpretation of any provision of
this Lease, then the party not prevailing in such dispute, as the case may be, shall pay any and all costs and expenses reasonably incurred by the other party in enforcing or establishing its rights hereunder through legal proceedings, including,
but not limited to, court costs, expert fees and costs and reasonable attorneys’ fees and disbursements. 
 [Signatures on Following
Page] 

  
 31 

 Landlord and Tenant have executed this Lease as a sealed Massachusetts instrument in two or
more counterparts as of the Effective Date of this Lease set forth above. 
  

			
	LANDLORD:
	
	 OPG MP PARCEL OWNER (DE) LLC,
 a
Delaware limited liability company

		
	By:	 	 /s/ Brian Barriero

	Name: Brian Barriero
	Title: Vice President
		
	By:	 	 /s/ Kristen Binck

	Name: Kristen Binck
	Title: Vice President
	
	TENANT:
	
	 IKENA ONCOLOGY, INC.,
 a Delaware
corporation

		
	By:	 	 /s/ Douglas Carlson

	Name: Douglas Carlson
	Title: Chief Financial Officer

  
 32 

 EXHIBIT A 

OUTLINE AND LOCATION OF PREMISES 

This Exhibit is attached to and made a part of the Lease Agreement (the “Lease”) by and between OPG MP PARCEL OWNER (DE)
LLC, a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a Delaware corporation (“Tenant”), for space in the Building located at 645 Summer Street, Boston, MA 02210. 

Exhibit A is intended only to show the general layout of the Premises as of the beginning of the Term of this Lease. The depiction of interior
windows, cubicles, modules, furniture and equipment in this Exhibit is for illustrative purposes only, but does not mean that such items exist. Landlord is not required to provide, install or construct any such items. It does not in any way
supersede any of Landlord’s rights set forth in the Lease with respect to arrangements and/or locations of public parts of the Building and changes in such arrangements and/or locations. It is not to be scaled; any measurements or distances
shown should be taken as approximate. The inclusion of elevators, stairways electrical and mechanical closets, and other similar facilities for the benefit of occupants of the Building does not mean such items are part of the Premises. 

[See Attached Floor Plan] 

  
 A-1 

 

 

  
 A-2 

 EXHIBIT B 

EXPENSES AND TAXES 

This Exhibit is attached to and made a part of the Lease Agreement (the “Lease”) by and between OPG MP PARCEL OWNER (DE) LLC,
a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a Delaware corporation (“Tenant”), for space in the Building located at 645 Summer Street, Boston, MA
02210. Capitalized terms used but not defined herein shall have the meanings given in the Lease. 
  

	1.	 Payments.

1.01 Expenses and Taxes. From and after the Term Commencement Date, Tenant shall pay (a) Tenant’s Proportionate Share of
Expenses (defined below), for each calendar year during the Term (“Tenant’s Share of Expenses”), and (b) Tenant’s Proportionate Share of Taxes (defined below) for each Fiscal Year (i.e., a period
commencing on July 1st and ending on June 30th) during the Term (“Tenant’s Share of Taxes”). Landlord
shall provide Tenant with a good faith estimate of the Tenant’s Share of Expenses for each calendar year and of the Tenant’s Share of Taxes for each Fiscal Year during the Term. On or before the first day of each month, Tenant shall
pay to Landlord a monthly installment equal to one-twelfth of Landlord’s estimate of both the Tenant’s Share of Expenses and Tenant’s Share of Taxes. If Landlord determines that its good
faith estimate of the Tenant’s Share of Expenses or of the Tenant’s Share of Taxes was incorrect by a material amount, Landlord may from time to time provide Tenant with a revised estimate. Commencing with the next monthly installment
payment due thirty (30) days after Tenant’s receipt of such revised estimate, Tenant’s monthly payments shall be based upon the revised estimate. If Landlord does not provide Tenant with an estimate of the Tenant’s Share of
Expenses by January 1 of a calendar year or the Tenant’s Share of Taxes by July 1 of a Fiscal Year, then Tenant shall continue to pay monthly installments based on the previous year’s estimate(s) until Landlord provides Tenant
with the new estimate. Upon delivery of the new estimate, an adjustment shall be made for any month for which Tenant paid monthly installments based on the previous year’s estimate. Tenant shall pay Landlord the amount of any
underpayment within thirty (30) days after receipt of the new estimate and invoice for such amounts. Any overpayment shall be refunded to Tenant within thirty (30) days or credited against the next due future installment(s) of
Additional Rent. Appropriate adjustments shall be made for any portion of a year at the beginning or end of the Term or for any year during which changes occur in the percentage of occupancy of the Building or in the Rentable Floor Area to
which Landlord furnishes particular services. 
 1.02 Reconciliation. As soon as is practical (which Landlord shall use
reasonable efforts to do within one hundred twenty (120) days) following the end of each (a) calendar year, Landlord shall furnish Tenant with a reasonably detailed statement containing breakdowns for the calculation of the actual Expenses
and Tenant’s Share of Expenses for the prior calendar year, and (b) Fiscal Year, Landlord shall furnish Tenant with a reasonably detailed statement containing breakdowns for the calculation of the actual Taxes and Tenant’s Share of
Taxes for the prior Fiscal Year. If the estimated Tenant’s Share of Expenses for the prior calendar year is more than the actual Tenant’s Share of Expenses for the prior calendar year, or if the estimated Tenant’s Share of Taxes for
the prior Fiscal Year is more than the actual Tenant’s Share of Taxes for the prior Fiscal Year, as the case may be, then Landlord shall either provide Tenant with a refund or apply any overpayment by Tenant against Additional Rent due or next
becoming due; provided that, if the Term expires before the determination of the overpayment, then Landlord shall refund any overpayment to Tenant after first deducting the amount of Rent due. If the estimated Tenant’s Share of Expenses
for the prior calendar year is less than the actual Tenant’s Share of Expenses for the prior calendar year, or if the estimated Tenant’s Share of Taxes for the prior Fiscal Year is less than the actual Tenant’s Share of Taxes for the
prior Fiscal Year, as the case may be, then Tenant shall pay 

  
 B-1 

 
Landlord, within thirty (30) days after its receipt of the statement and invoice for such amount of Expenses or Taxes, any underpayment for the prior calendar year (for Expenses) or for the
prior Fiscal Year (for Taxes), as the case may be. Notwithstanding any dispute concerning any Landlord’s statement, payments shall be made by the parties in accordance with Landlord’s statement at the time and in the manner set forth
above, and if necessary there shall be a further adjustment between the parties at the time the dispute is resolved. 
  

	2.	 Property Operating Expenses.

2.01 “Expenses” means all costs and expenses incurred in each calendar year in connection with operating, maintaining,
repairing, and managing the Building, the Property and the Industrial Park. It is understood that the Building is part of the Industrial Park and is operated along with all or some of the other portions of the Industrial Park, and that the Expenses
for the Building include shared costs and expenses which are allocated among the Building and other portions of the Industrial Park based upon the proportionate usage or benefit derived from the shared facilities (including the Parking Facilities),
as reasonably determined by Landlord. Expenses include, without limitation: (a) all labor and labor related costs, including wages, salaries, bonuses, taxes, insurance, uniforms, training, retirement plans, pension plans and other employee
benefits; (b) management fees; (c) the cost of equipping, staffing and operating an on-site and/or off-site management office for the Building (including,
without limitation, the fair market rental value of any management office located in the Building), provided if the management office services one or more other buildings or properties, the shared costs and expenses of equipping, staffing and
operating such management office(s) shall be equitably prorated and apportioned between the Building and the other buildings or properties; (d) costs of accounting and IT services (which shall be equitably prorated between the Building and
other buildings or properties to which such services are provided); (e) the cost of services; (f) rental and purchase cost of parts, supplies, tools and equipment; (g) insurance premiums and commercially reasonable deductibles;
(h) electricity, gas and other utility costs, except to the extent that such charges are reimbursed to Landlord separately (or paid directly to the utility company) by Tenant or any other tenant, occupant, person or other party; (i) ground
lease rent (for purposes hereof “ground lease rent” shall be limited to the Base Rent provided in Section 5.1(a) of the Ground Lease and the District Service Fee provided in Section 5.6 of the Ground Lease and the Infrastructure
Improvement Credit shall be credited against the same); and (j) the amortized cost of capital improvements and capital repairs and capital replacements (as distinguished from non-capital repair and
replacement parts or components made or installed in the ordinary course of business) that are: (1) reasonably intended to reduce current or future operating expense costs, or (2) required to comply with any Laws that are first
effective, or first interpreted to apply to the Property after the Term Commencement Date (“Permitted Capital Expenses”). The cost of Permitted Capital Expenses shall be amortized by Landlord over the useful life of the Permitted
Capital Expenses or, in the case of a cost saving capital improvement, over the Payback Period (as defined below). The amortized cost of Permitted Capital Expenses may, at Landlord’s option, include actual or imputed interest at the rate that
Landlord would reasonably be required to pay to finance the cost of the capital improvement or such other items. “Payback Period” means the reasonably estimated period of time that it takes for the cost savings resulting from
Permitted Capital Expenses to equal the total cost of the Permitted Capital Expenses. Expenses incurred in connection with obtaining LEED certification for the Building shall be capitalized and included in Expenses only to the extent allowed as
Permitted Capital Expenses pursuant to the foregoing provisions. Landlord, by itself or through an affiliate, shall have the right to directly perform, provide and be compensated for any services under the Lease. If Landlord incurs Expenses for
the Building, Property or Industrial Park together with one or more other buildings or properties, whether pursuant to a reciprocal easement agreement, common area agreement or otherwise, the shared costs and expenses shall be equitably prorated and
apportioned between the Building, Property or Industrial Park and the other buildings or properties.

  
 B-2 

 2.02 Exclusions. Expenses shall not include: (1) the cost of capital
improvements, capital repairs or capital replacements (except as expressly set forth above with respect to Permitted Capital Expenses); (2) depreciation; (3) principal and interest payments and other such charges with respect to mortgage and
other non-operating debts of Landlord or with respect to the Property; (4) the cost of repairs or other work to the extent Landlord is reimbursed by insurance or condemnation proceeds, by other tenants
(other than through the payment of Expenses) or from any other source; (5) costs in connection with leasing space in the Building or Industrial Park, including brokerage commissions, lease concessions, rental abatements, and construction
allowances granted to specific tenants; (6) costs incurred in connection with the sale, financing or refinancing of the Building or the Industrial Park or any portion thereof; (7) fines, interest and penalties incurred due to the late
payment of Taxes or Expenses; (8) organizational expenses associated with the creation and operation of the entity which constitutes Landlord; (9) any penalties or damages that Landlord pays to Tenant under this Lease or to other tenants
in the Building or the Industrial Park under their respective leases; (10) wages, bonuses and other compensation of any employee who does not devote substantially all of his or her employed time to the Building unless such wages and benefits
are prorated on a reasonable basis to reflect time spent on the operation and management of the Building vis-à-vis time spent on matters unrelated to the
operation and management of the Building; (11) wages, bonuses and other compensation of employees above the grade of general manager (provided that with respect to any general manager or employee that does not devote substantially all of his or
her employed time to the Building, such wages, bonuses and other compensation are prorated on a reasonable basis to reflect time spent on the operation and management of the Building
vis-à-vis time spent on matters unrelated to the operation and management of the Building); (12) [intentionally deleted]; (13) costs of electricity provided to
tenants’ premises, if and to the extent that Tenant is charged for such electricity services under other provisions of this Lease; (14) charitable or political contributions; (15) [intentionally deleted]; (16) the cost of testing,
remediation or removal, transportation or storage of Hazardous Materials at the Property (provided that the foregoing shall not relieve Tenant of its obligations with respect to those costs for which Tenant is otherwise responsible pursuant to the
terms of this Lease); (17) fines, penalties, or interest resulting from Landlord’s negligence, willful misconduct, violation of law or breach of contract or that of Landlord’s employees, agents, or contractors; (18) insurance
deductibles in excess of commercially reasonable deductibles; (19) the amount of a judgment or settlement against Landlord which is not covered by the insurance required to be carried by Landlord under this Lease; (20) subject to the terms
of Article 7 of the Lease, costs for electricity supplied to tenants’ premises in the Building and all costs of water supplied to tenants’ premises in the Building if and to the extent Tenant’s usage of electricity or water,
respectively, is separately metered, check metered or submetered and paid separately by Tenant; (21) any Expenses paid to an affiliate of Landlord to the extent the same is in excess of the reasonable cost of said item or service in an
arm’s length transaction; (22) reserves of any kind; (23) Taxes (which shall be payable by Tenant, separate from Expenses, as provided pursuant to the terms of this Lease) and any inheritance, estate, succession, transfer, gift,
franchise, corporation, income, gains or profit tax or capital levy and other taxes excluded from the definition of Taxes; (24) management fees in excess of 3% of net rents from the Property; (25) leasing commissions, fees and costs,
advertising and promotional expenses and other costs incurred in selling the Building or the Property; (26) legal fees or other expenses incurred in connection with negotiating and enforcing leases, letters, deal memos, letters of intent,
subleases and/or assignments with tenants or occupants in the Building, including costs incurred in connection with consents and approvals under leases in the Building; (27) cost of any work or service performed on an extra cost basis for any
tenant in the Building or the Property to the extent such work or service is in excess of any work or service Landlord makes available to Tenant or generally to other tenants in the Building at Landlord’s expense; (28) costs incurred in
connection with repair, maintenance and replacement of any bathrooms located within the premises of another tenant of the Building to the extent such costs are separately billed; and (29) costs incurred in connection with upgrading the Building
to correct any violation of Laws existing as of the Term Commencement Date (provided that the foregoing shall not relieve Tenant of its obligations with respect to any compliance, contest or settlement of any claimed violation of law or requirements
of law for which Tenant is responsible under the terms of this Lease). 

  
 B-3 

 2.03 Adjustments. If at any time during a calendar year the Building is not at
least 95% leased and/or occupied and receiving Landlord services hereunder (or if a service provided by Landlord to tenants of the Building generally is not provided by Landlord to particular tenant(s) due to self-provided services or other
circumstances), Expenses that vary based upon the occupancy of the Building shall, at Landlord’s option, be determined as if the Building had been 95% leased and/or occupied (and all services provided by Landlord to tenants of the Building
generally had been provided by Landlord to tenants occupying 95% of the entire Building) during that calendar year. Notwithstanding the foregoing, Landlord may calculate the extrapolation of Expenses under this Section based on 100% occupancy and
service so long as such percentage is used consistently for each year of the Term. The extrapolation of Expenses under this Section shall be performed by appropriately adjusting the cost of those components of Expenses that are impacted by changes
in the occupancy or service levels of the Building and, upon request, Landlord shall provide reasonable documentation of such calculation to Tenant. 
  

	3.	 Property Taxes. 

“Taxes” shall mean: (a) all real property taxes and other assessments on the Building and/or Property, including,
but not limited to, gross receipts taxes, assessments for special improvement districts and business improvement districts, governmental charges, fees and assessments for police, fire, traffic mitigation or other governmental service of purported
benefit to the Property, taxes and assessments levied in substitution or supplementation in whole or in part of any such taxes and assessments and the Property’s share of any real estate taxes and assessments under any reciprocal easement
agreement, common area agreement, or similar agreement as to the Property; (b) all personal property taxes for property that is owned by Landlord and used in connection with the operation, maintenance and repair of the Property; and
(c) all commercially reasonable costs and fees incurred in connection with seeking reductions in any tax liabilities described in (a) and (b), including, without limitation, any costs incurred by Landlord for compliance, review, and appeal
of tax liabilities. Without limitation, Taxes shall be determined without regard to any “green building” credit and shall not include any income, capital levy, transfer, capital gain, gift, estate, or inheritance tax or any fines,
interest or penalties incurred due to the late payment of Taxes (unless such late payment is due to Tenant’s delinquency). If a change in Taxes is obtained for any year of the Term during which Tenant paid Tenant’s Proportionate Share of
any Tenant’s Share of Taxes, then Taxes for that year will be retroactively adjusted and Landlord shall provide Tenant with a credit, if any, based on the adjustment. Tenant shall pay Landlord the amount of Tenant’s Proportionate
Share of any such increase in the Tenant’s Share of Taxes within thirty (30) days after Tenant’s receipt of a statement from Landlord.
  

	4.	 Audit Rights. 

Within one hundred eighty (180) days after receiving Landlord’s annual reconciliation statement of Expenses (the “Review
Notice Period”), Tenant may give Landlord written notice (“Review Notice”) that Tenant intends to review Landlord’s records of the Expenses for the calendar year to which the statement applies, and identifying, with a
reasonable degree of specificity, the information regarding Expenses that Tenant desires to review (the “Request for Information”). Within a reasonable time after Landlord’s receipt of a timely Request for Information
regarding Expenses and executed Audit Confidentiality Agreement (referenced below), Landlord shall forward to Tenant such records (or copies thereof) of Expenses for the applicable calendar year that are reasonably necessary for Tenant to conduct
its review of the information regarding Expenses appropriately identified in the Request for Information. Within ninety (90) days after any particular records regarding Expenses are made available to Tenant (such period is referred to as
the “Objection Period”), Tenant shall have the right to give 

  
 B-4 

 
Landlord written notice (an “Objection Notice”) stating in reasonable detail any objection to Landlord’s statement of Expenses for the year to which the Review Notice
relates. If Tenant provides Landlord with a timely Objection Notice and the parties agree, or it is otherwise determined pursuant to arbitration as provided below, that Expenses for the calendar year are less than reported, then Landlord shall
provide Tenant with a credit against the next installment of Rent in the amount of the overpayment by Tenant. If the parties agree, or it is otherwise determined pursuant to arbitration as provided below, that Expenses for the calendar year are
greater than reported, Tenant shall pay Landlord the amount of any underpayment within thirty (30) days. If Tenant fails to give Landlord an Objection Notice with respect to any records that have been made available to Tenant prior to
expiration of the Objection Period applicable to the records which have been provided to Tenant, Tenant shall be deemed to have approved Landlord’s statement of Expenses with respect to the matters reflected in such records and shall be barred
from raising any claims regarding the Expenses relating to such records for that year. If Tenant fails to timely provide Landlord with a Review Notice and the Request for Information, Tenant shall be deemed to have approved Landlord’s
statement of Expenses and shall be barred from raising any claims regarding the Expenses for that year.
 If Tenant retains an agent to
review Landlord’s records, the agent must be with a reputable and mutually acceptable certified public accounting firm licensed to do business in the Commonwealth of Massachusetts. Tenant shall be solely responsible for all costs, expenses
and fees incurred for the audit, and Tenant shall not directly or indirectly engage such agent or any other party in connection with such review whose compensation or fees are charged in whole or in part on a contingency basis. However,
notwithstanding the foregoing, if Landlord and Tenant determine, or if it is otherwise determined pursuant to arbitration as provided below, that Tenant’s Share of Expenses for the calendar year in question were less than Landlord stated in the
applicable statement by more than five percent (5%), Landlord, within thirty (30) days after its receipt of paid invoices therefor from Tenant, shall reimburse Tenant for the reasonable out-of-pocket costs paid by Tenant in connection with such review by Tenant, up to a maximum of $7,500.00. The records and related information obtained by Tenant shall be treated as confidential, and
applicable only to the Building, by Tenant and its auditors, consultants and other parties reviewing such records on behalf of Tenant (collectively, “Tenant’s Auditors”), and, prior to making any records available to Tenant or
Tenant’s Auditors, Landlord may require Tenant and Tenant’s Auditors to each execute a confidentiality agreement in a form reasonably provided by Landlord (“Audit Confidentiality Agreement”) in accordance with the
foregoing. In no event shall Tenant be permitted to examine Landlord’s records or to dispute any statement of Expenses unless Tenant has paid and continues to pay all Rent when due. 

Tenant shall have the right to make such examination no more than once in respect of each calendar year during the Term. 

If the parties dispute the results of Tenant’s audit of Landlord’s annual reconciliation statement of Expenses, and if the parties
are unable to reach a resolution on an amount that exceeds $5,000.00 in remaining Tenant liability within sixty (60) days after Landlord’s receipt of an Objection Notice, as the case may be, Landlord and Tenant shall designate a certified
public accountant (the “Arbiter”) whose determination made in accordance with this paragraph, shall be rendered within sixty (60) days after selection of the Arbiter, and shall be binding upon the parties. The arbitration
pursuant to this Section shall be conducted in Boston, Massachusetts, in accordance with the Commercial Arbitration Rules of the American Arbitration Association and the Expedited Procedures of the Commercial Arbitration Rules in effect when the
arbitration begins. Tenant shall pay the cost of the Arbiter unless the Arbiter determines that Landlord overstated Expenses by five percent (5%) or more of the actual amounts due, in which event Landlord will pay the costs of the Arbiter and the
reasonable costs of Tenant’s audit, up to a maximum of $10,000.00 with respect to the costs of Tenant’s audit, and up to a maximum of $25,000.00 with respect to the costs of the Arbiter. The Arbiter shall be an independent certified public
accountant having at least fifteen (15) years of experience in commercial real estate accounting in the downtown Boston, Massachusetts area, and with no ongoing relationship to either party. In rendering its determination, the Arbiter shall be
bound by the provisions of this Lease and shall not add to, subtract from or otherwise modify the provisions of the Lease. 
  

  
 B-5 

 EXHIBIT C 

WORK LETTER 
 This
Exhibit is attached to and made a part of the Lease Agreement (the “Lease”) by and between OPG MP PARCEL OWNER (DE) LLC, a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a
Delaware corporation (“Tenant”), for space in the Building located at 645 Summer Street, Boston, MA 02210. Capitalized terms used but not defined herein shall have the meanings given in the Lease. 

C.1 Intentionally omitted. 

C.2 Landlord’s Work. Landlord shall perform the base building work listed in the “Landlord” column and
identified as “Base Building Work” on the Landlord / Tenant Responsibility Matrix attached hereto as Schedule C-1 (the “Responsibility Matrix”), using Building standard
materials, quantities and finishes (the “Base Building Work”). In addition, the Initial Tenant Work shall be constructed by Landlord in accordance with, and subject to, the provisions of this Exhibit C. All
work to be performed by Landlord under this Paragraph C.2 shall be performed in a good and workmanlike manner and in accordance with all applicable Laws. Subject to Force Majeure and Tenant Delays, Landlord shall use reasonable efforts to perform
the Base Building Work and the Initial Tenant Work in accordance with the milestone schedule attached hereto as Schedule C-4 (the “Milestone Schedule”).  

The “Substantial Completion Date” (for purposes of Section 3.01(b) of the Lease) shall mean the date on which the
Landlord has substantially completed the Base Building Work and the Initial Tenant Work. Landlord shall use commercially reasonable efforts to substantially complete the Base Building Work and the Initial Tenant Work on or before the Estimated Term
Commencement Date. In the event that the Substantial Completion Date is delayed beyond the Estimated Term Commencement Date (other than due to a Tenant Delay, as defined below), then the “Estimated Term Commencement Date” set forth
in Section 1 of the Lease shall be delayed by one day for each day of such delay by Landlord in achieving the Substantial Completion Date. Notwithstanding anything to the contrary contained in this Exhibit C or the Lease, in the event
that a Tenant Delay and a Force Majeure delay are occurring on the same date, only one (1) day of delay resulting from such Tenant Delay and Force Majeure delay may be claimed for each such overlapping day. 

For purposes hereof, “substantially complete” and “substantial completion” shall mean that the applicable work by Landlord
under this Paragraph C.2 has been completed, other than minor punchlist-type items the completion of which will not unreasonably delay or interfere with Tenant’s occupancy of the Premises for the regular conduct of business, as certified
in writing by Landlord’s architect, and as evidenced by the issuance of a temporary or permanent certificate of occupancy for the Premises; provided, however, that if such certificate of occupancy cannot be issued due to any work to be
performed by Tenant or installation of cabling, furniture, fixtures or equipment to be performed by Tenant, or any other action required of Tenant, then the issuance of a certificate of occupancy shall not be a condition to the occurrence of the
Substantial Completion Date or the Term Commencement Date, and the Base Building Work and the Initial Tenant Work shall be deemed substantially complete on the date that the certificate of occupancy would have issued but for the non-completion of such work, installation or action to be performed by Tenant. 
 Notwithstanding anything
to the contrary contained in this Exhibit C or the Lease, Landlord shall deliver to Tenant notice of a Force Majeure delay and/or Tenant Delay within five (5) Business Days after Landlord has actual knowledge of the occurrence of same
(except that no notice shall be required in connection with any failure by Tenant to timely comply with any time periods expressly set forth in this 

  
 C-1 

 
Lease). If Landlord fails to deliver to Tenant notice of a Force Majeure delay and/or Tenant Delay within five (5) Business Days after Landlord has actual knowledge of the occurrence of
same, the period prior to the delivery of Landlord’s notice of a Force Majeure delay and/or Tenant Delay event will not be counted as a Force Majeure delay and/or Tenant Delay. If Tenant disputes whether such Force Majeure delay and/or Tenant
Delay has occurred, such dispute shall be subject to Paragraph C.11 below. 
 C.3 Landlord’s Construction Documents. Landlord
shall prepare the plans and specifications for the Initial Tenant Work (the “Construction Documents”). The Construction Documents shall be consistent with the “Jacobs Spec Plan” dated June 1, 2020 attached hereto as
Schedule C-3 (the “Jacobs Spec Plan”). Tenant shall respond promptly (and in all events within five (5) Business Days) to Landlord’s requests from time to
time for Tenant’s approval of all construction-related items (e.g., carpet and paint selections) not specified on Schedule C-3. 

C.4 Cost of the Base Building Work and Initial Tenant Work. Landlord shall perform the Base Building Work at Landlord’s sole
expense. In addition, Landlord shall perform the portions of the Initial Tenant Work listed in the “Landlord” column and identified as “Initial Tenant Work” on the Responsibility Matrix and shown on the Jacobs Spec Plan, at
Landlord’s sole expense. Any item of work not listed in the “Landlord” column and identified as “Initial Tenant Work” on the Responsibility Matrix and shown on the Jacobs Spec Plan, including without limitation, the design
and construction of the vivarium, shall constitute an “Add Alternate Item”, and any change or addition to the Initial Tenant Work as listed in the “Landlord” column and identified as “Initial Tenant Work” on the
Responsibility Matrix and shown on the Jacobs Spec Plan shall constitute an Initial Tenant Work Change Order under Paragraph C.5 below, and Tenant shall be responsible for (i) all costs of all Add Alternate Item and (ii) all
additional costs arising from any Initial Tenant Work Change Order (collectively, the “Excess Tenant Work Costs”). 
 Prior
to Landlord commencing construction of the Add Alternate Items, Tenant shall deposit with Landlord fifty percent (50%) of the estimated total costs of the Add Alternate Items within thirty (30) days after Tenant’s receipt of an invoice
therefor. In addition, Landlord may from time to time require Tenant to pay the estimated cost for an Initial Tenant Work Change Order to Landlord before performing such Initial Tenant Work Change Order or otherwise within thirty (30) days
following receipt of each Landlord’s invoices for each such Initial Tenant Work Change Order. Within ninety (90) days after the completion of all items of Initial Tenant Work listed on the Final Punchlist, Landlord shall provide Tenant
with a final invoice prepared by Landlord for all remaining Excess Tenant Work Costs. Such statement shall be conclusive between the parties unless the statement is incorrect and is disputed by Tenant by notice to Landlord given within ten
(10) Business Days after Tenant’s receipt of the statement, specifying in reasonable detail any disputed items. Upon issuance of such final statement, there shall be adjustments between Landlord and Tenant to the end that Landlord shall
have received the exact amount due to Landlord hereunder on account of Excess Tenant Work Costs. Any remaining amount due by Tenant of the Excess Tenant Work Costs shall be due and payable, within thirty (30) days after receipt of such
statement. 
 Notwithstanding anything to the contrary, with respect to the Generator Upgrade Change Order (as defined in Exhibit F),
Tenant shall only be responsible for Tenant’s Generator Share (i.e., fifty percent (50%)) of the cost of the Generator Upgrade Change Order. Tenant shall pay Tenant’s Generator Share of the Generator Upgrade Change Order in the same
manner as any other Initial Tenant Work Change Order. For purposes of clarification of the foregoing, if the cost of the Generator Upgrade Change Order is $150,000.00, Tenant’s Generator Share of the Generator Upgrade Change Order is
$75,000.00. Landlord may require Tenant to pay such $75,000.00 to Landlord before performing such Generator Upgrade Change Order or otherwise within thirty (30) days following receipt of Landlord’s invoices for the Generator Upgrade Change
Order. 

  
 C-2 

 C.5 Change Orders. Tenant may, from time to time, by written order to Landlord on a
form specified by Landlord (“Initial Tenant Work Change Order” or “Change Order”), request a change in the Initial Tenant Work shown on the Construction Documents. Upon receipt of any Change Order, Landlord shall
submit to Tenant a price estimate for such Change Order. Landlord shall cause the Initial Tenant Work to be performed in accordance with such Initial Tenant Work Change Order after reasonable approval thereof by Landlord. The Construction Documents
shall not be modified in any material respect except with Landlord’s reasonable prior written approval; and all modifications to the Construction Documents, whether material or not, shall be made only by Initial Tenant Work Change Order
submitted to and reasonably approved by Landlord. Tenant shall be responsible for all additional costs arising from any Initial Tenant Work Change Order as provided in Paragraph C.4 above (including, without limitation, as to each such Initial
Tenant Work Change Order, the general contractor mark-ups for general conditions and fees and the applicable construction management fee equal to five percent (5.0%) of the total additional costs of such
change order, including any mark-ups charged by the general contractor, architect or other consultants for Landlord’s managing agent providing such construction management services) and shall pay such
Excess Tenant Work Costs to Landlord as provided in Paragraph C.4 above. 
 C.6 Landlord’s Performance of the
Work. Landlord shall be deemed authorized to proceed with the Initial Tenant Work shown on the Construction Documents on the fifth (5th) Business Day after Landlord submits to Tenant the price
for the Excess Tenant Work Costs under Paragraph C.4, unless Tenant has then requested that Landlord delay the commencement of the Initial Tenant Work, in which event any such timely request (or any subsequent request) by Tenant to delay the
work shall be subject to the provisions on Tenant Delay under Paragraph C.10 below. All Initial Tenant Work shall be performed and constructed by Landlord in accordance with the Construction Documents and in a good and workmanlike manner and in
compliance with applicable Laws. 
 With respect to any Initial Tenant Work Change Order submitted after Landlord is initially authorized
(or deemed authorized) to proceed with the Initial Tenant Work, Landlord shall submit to Tenant a price estimate for such Change Order, and Landlord shall be deemed authorized to proceed with such Change Order on the fifth (5th) Business Day after submission of the price estimate to Tenant if the Change Order has not then been withdrawn. 

No Initial Tenant Work shall be performed except in accordance with the Construction Documents, and any Initial Tenant Work Change Orders,
reasonably approved by Landlord. Landlord may require that the Construction Documents or any Initial Tenant Work Change Order be revised if, in Landlord’s reasonable judgment, (i) the requested work would delay completion of the Base
Building Work or the Initial Tenant Work beyond the Estimated Term Commencement Date (unless Tenant acknowledges that such delay shall constitute a Tenant Delay under Paragraph C.10 below), (ii) would increase the cost of operating the
Building or performing any other work in the Building (unless Tenant pays such additional costs), (iii) are incompatible with the design, quality, equipment or systems of the Building, or (iv) otherwise do not comply with the provisions of
this Lease (including, without limitation, Section 8). Landlord shall not be responsible for any aspects of the design of the Initial Tenant Work, including the design of any Initial Tenant Work shown on any Initial Tenant Work Change Orders,
with respect to the adequacy of the design for Tenant’s intended use of the Premises. 
 C.7 Tenant’s Early Access. The
Initial Tenant Work to be performed by Landlord under this Exhibit C shall not include the purchase, installation, or testing of any office, conference room, break out rooms, reception and kitchen furniture or any other
furniture, personal property, computers or telecommunications equipment, cabling, security or any other specialized business fixtures and equipment or wiring therefor (even if the same may be generally depicted for illustration or space planning
purposes on the Construction Documents), all of which shall be Tenant’s responsibility under this Paragraph C.7. Prior to the Substantial Completion Date, any entry by Tenant into the Premises for the purposes of

  
 C-3 

 
installing Tenant’s wiring, furniture, equipment, and personal property shall be subject in each case to (i) Landlord’s approval of the schedule and scope of such work (which shall
not delay the performance by Landlord of the Base Building Work or the Initial Tenant Work), (ii) Landlord’s approval of Tenant’s contractors or vendors for such work in accordance with Section 8 of the Lease,
(iii) Landlord’s receipt from Tenant of copies of all necessary permits for the applicable work by Tenant, if any, and (iv) customary insurance certificates from Tenant’s contractors, subcontractors, and other parties acting
under Tenant with respect to the applicable work in accordance with Section 8 of the Lease. Tenant shall be responsible for any damage to the Base Building Work or the Initial Tenant Work or the Premises caused by Tenant or its employees,
agents, contractors, subcontractors, material suppliers and laborers in connection with such entry. Any entry into the Premises by Tenant (or its contractors, subcontractors, or other parties acting under Tenant) prior to the Substantial Completion
Date shall be subject to all of the provisions of the Lease that are applicable to the Premises during the Term, except for the obligation to pay Base Rent, Tenant’s Share of Expenses and Tenant’s Share of Taxes. 

C.8 Close-Out of Initial Tenant Work. On a date reasonably specified by Landlord, Landlord and
Tenant shall inspect the Initial Tenant Work for the purpose of preparing a list of the punchlist-type items then remaining to be completed (the “Final Punchlist”). Landlord shall submit the Final Punchlist to Tenant, and Tenant
shall sign and return the Final Punchlist to Landlord within thirty (30) days after its receipt, noting any items that Tenant reasonably believes should be added thereto. Items shall not be added to the Final Punchlist by Tenant after it is
delivered to Landlord. If the Final Punchlist is not timely delivered by Tenant, then the Initial Tenant Work shall be deemed final and complete, and Landlord shall have no further obligation to cause any other Initial Tenant Work to be completed,
other than the punchlist items specified in Landlord’s Final Punchlist and the correction of latent defects as provided below. With respect to items on the Final Punchlist not in dispute, Landlord shall cause such items to be completed in a
diligent manner during regular business hours, but in a manner that will seek to minimize interruption of Tenant’s use and occupancy. With respect to any disputed Final Punchlist items, Landlord shall cause such items to be completed in like
manner, but Landlord may nevertheless reserve Landlord’s rights to require Tenant to pay the costs therefor as Excess Tenant Work Costs. 

Except for latent defects and uncompleted items of Initial Tenant Work specified in the Final Punchlist, Tenant shall be deemed to have
accepted all elements of the Initial Tenant Work on the Term Commencement Date. In the case of a dispute concerning the completion of items of the Initial Tenant Work specified in the Final Punchlist, such dispute shall be subject to Paragraph C.11
below. In the case of latent defects in the Initial Tenant Work appearing after the Term Commencement Date, Tenant shall be deemed to have waived any claim for correction or cure thereof on the earlier of (a) the date thirty (30) days
after the date such defect was discovered if Tenant has not then given notice thereof to Landlord or (b) the date fifty one (51) weeks following the Substantial Completion Date if Tenant has not then given notice of such defect to
Landlord. With respect to items as to which Tenant has given adequate and timely notice hereunder, Landlord shall, at Landlord’s sole cost and expense, cause Landlord’s contractor so to remedy, repair, or replace any incomplete, defective
or malfunctioning aspects of the Initial Tenant Work that materially affect Tenant’s occupancy of the Premises, such action to occur as soon as practicable during normal working hours and so as to avoid any unreasonable interruption of
Tenant’s use of the Premises. If timely and adequate notice has been given and if Landlord has other guarantees, contract rights, or other claims against contractors, materialmen or architects, Landlord shall, with regard to any incomplete,
defective or malfunctioning aspects of the Initial Tenant Work that materially affect Tenant’s occupancy of the Premises, use reasonable efforts to enforce such guarantees or contract rights. The foregoing shall constitute Landlord’s
entire obligation with respect to all incomplete, defective, or malfunctioning aspects of the Initial Tenant Work. 

  
 C-4 

 C.9 Authorized Representatives. Tenant hereby designates Vanessa Thompson
(VThompson@ikenaoncology.com) to serve as Tenant’s representative, who shall have full power and authority to act on behalf of Tenant on any matters relating to the Initial Tenant Work (“Tenant’s Authorized
Representative”). Tenant may from time to time change Tenant’s Authorized Representative or designate additional Tenant’s Authorized Representative(s) by written notice delivered to Landlord in accordance with the Lease. Landlord
hereby designates Nicole Looney (NLooney@oxfordproperties.com) to serve as Landlord’s representative, who shall have full power and authority to act on behalf of Landlord on any matters relating to the Initial Tenant Work
(“Landlord’s Authorized Representative”). Landlord may from time to time change Landlord’s Authorized Representative or designate additional Landlord’s Authorized Representative(s) by written notice delivered to
Tenant in accordance with the Lease. 
 C.10 Tenant Delays. Tenant acknowledges that substantial time will be required on its part to
provide complete information concerning its requirements to the architect and engineers for the Base Building Work and the Initial Tenant Work, that Tenant must make timely decisions as and when requested hereunder, that time is of the essence to
Landlord in causing the Term Commencement Date to occur as early as possible, and that Tenant will cooperate with Landlord to achieve the earliest possible Term Commencement Date. Any delay in the commencement or performance of the Base Building
Work or the Initial Tenant Work as a result of any of the following is referred to herein as a “Tenant Delay”: 
  

	 	(i)	 any failure by Tenant to timely respond within the above-designated time periods to requests for information
necessary to complete the preparation of the Construction Documents or to carry out the Base Building Work or the Initial Tenant Work; 

  

	 	(ii)	 any failure by Tenant timely to approve within the above-designated time periods a substitute for any
materials, equipment, designs, processes, or products shown on the Construction Documents that are not readily available to Landlord’s contractor to acquire in a timely manner and incorporate into the Initial Tenant Work in the ordinary course
without delay, 

  

	 	(iii)	 any Initial Tenant Work Change Order that actually causes a delay in the commencement or performance of the
Initial Tenant Work, whether or not such requested Initial Tenant Work Change Order is actually implemented; 

  

	 	(iv)	 any failure of Tenant to act in a timely manner within the above-designated time periods on any
construction-related question or matter, 

  

	 	(v)	 any request by Tenant that Landlord delay the commencement of, or delay or suspend the performance of, any
element of the Initial Tenant Work, or 

  

	 	(vi)	 any other act or omission of Tenant or any of their officers, employers, agents, contractors, or equipment
vendors, including without limitation under Paragraph C.7 above, that actually causes a delay in the commencement or performance of the Base Building Work, the Initial Tenant Work, the Add Alternate Items and any Initial Tenant Work Change
Order. 

 For each day of Tenant Delay, the “Substantial Completion Date” shall be deemed to be one day earlier than the actual
date thereof, and the Term Commencement Date and Tenant’s obligation to pay Base Rent and additional charges shall be accelerated accordingly under Section 3.01 of the Lease. 

C.11 Dispute Resolutions. In the event of a controversy, dispute or claim arising out of, from or relating to the interpretation,
performance or breach of the provisions of this Exhibit C whether based on contract, tort, equity or statute and including without limitation disputes concerning entitlement to and exercise of termination rights or default remedies
(collectively, a “Dispute”), in each case as between 

  
 C-5 

 
Landlord and Tenant, senior representatives of the parties shall meet and attempt to resolve the Dispute in good faith. If the Dispute is not resolved pursuant to this procedure within
thirty (30) days after the commencement of such procedure, then the method of dispute resolution with respect to which either party may choose to avail itself of shall (unless Landlord and Tenant mutually agree in writing otherwise) be
arbitration in accordance with this Paragraph C.11.     
 A Dispute submitted to arbitration hereunder shall be
administered by the American Arbitration Association (“AAA”) in accordance with the Commercial Arbitration Rules and the Expedited Procedures (except that the arbitrator shall be bound by the provisions of this Lease and shall not
have the power to add to, subtract from, modify or change any of the provisions of this Lease). Unless the parties otherwise agree in writing: (i) the arbitration shall be administered by a single arbitrator, who shall be an attorney who
is also a licensed engineer, registered architect, or other construction professional and/or an attorney who specializes in construction disputes; (ii) the arbitration shall be conducted in Boston, Massachusetts; and (iii) the award or
decision of the arbitrator shall be in writing, shall be signed by the arbitrator, and shall include a statement regarding the reasons for the disposition of all Disputes submitted to the arbitrator. Each party shall bear its own costs and
expenses and an equal share of the arbitrator’s and administrative fees of arbitration, provided, however, the arbitrator shall have the authority to award the prevailing party an amount equal to such party’s actual Dispute resolution
costs and expenses incurred in connection with the Dispute, including without limitation reasonable attorneys’ and professionals’ fees. The award rendered by the arbitrator shall be final, and judgment may be entered upon it in
accordance with applicable law in any court in the Commonwealth of Massachusetts. No claims, disputes, controversies or other matters in question arising out of or relating to the Lease, this Exhibit C or the transactions contemplated
thereby and hereby, other than Disputes, shall be subject to the arbitration provisions of this Paragraph C.11. Notwithstanding anything to the contrary contained herein, the arbitrator shall have no authority to award extra-contractual damages
or remedies for the benefit of either party (i.e., it is the intention of Landlord and Tenant that the arbitrator’s authority be limited to making factual determinations, awarding damages and directing remedies based on the express terms
and conditions of this Exhibit C). In the event a dispute resolution under this Paragraph C.11 results in a delay in the Term Commencement Date beyond the Estimated Term Commencement Date, such delay shall constitute a Tenant Delay
unless Tenant is the prevailing party in such dispute resolution.
 The provisions of this Paragraph C.11 shall not apply to disputes
arising under the body of the Lease. 

  
 C-6 

 Schedule C-1 

Landlord / Tenant Responsibility Matrix 

[Omitted] 

  
 C-7 

 Schedule C-2 

[Intentionally Deleted] 

  
 C-8 

 Schedule C-3 

Jacobs Spec Plan for Initial Tenant Work 
  

 
 

 

  
 C-1 

 Schedule C-4 

Milestone Schedule 
 [Omitted] 

  
 C-1 

 EXHIBIT D 

COMMENCEMENT LETTER 

[Omitted]

  
 D-1 

 EXHIBIT E 

BUILDING RULES AND REGULATIONS 

[Omitted]

  
 E-1 

 EXHIBIT F 

ADDITIONAL PROVISIONS 

This Exhibit is attached to and made a part of the Lease Agreement (the “Lease”) by and between OPG MP PARCEL OWNER (DE) LLC,
a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a Delaware corporation (“Tenant”), for space in the Building located at 645 Summer Street, Boston, MA
02210. Capitalized terms used but not defined herein shall have the meanings given in the Lease. 
  

	1.	 Parking; Amenities. 

 

	 	a.	 Parking. 

  

	 	i.	 During the Term, Tenant shall have the right to lease from Landlord, and Landlord shall lease to Tenant, or
cause the operator (the “Operator”) of the surface parking lot serving the Building (the “Parking Facilities”) to lease to Tenant, fourteen (14) unreserved parking spaces in the Parking Facilities (the
“Spaces”) for the use of Tenant and its employees and visitors. The Spaces shall be leased at the rate of $190.00 per unreserved Space, per month, as such rate may be adjusted from time to time (but no more than one (1) time
per twelve (12) month period during the Term) to reflect the then current rate for parking in the Parking Facilities, which such rate shall be consistent with parking rates at comparable surface parking lots in Boston’s Seaport District.
If requested by Landlord, Tenant shall execute and deliver to Landlord the standard parking agreement used by Landlord or the Operator in the Parking Facilities for such Spaces. 

 

	 	ii.	 No deductions or allowances shall be made for days when Tenant or any of its employees does not utilize the
parking facilities or for Tenant utilizing less than all of the Spaces. Tenant shall not have the right to lease or otherwise use more than the number of unreserved Spaces set forth above. 

 

	 	iii.	 Except for particular spaces and areas designated by Landlord or the Operator for reserved parking, all parking
in the Parking Facilities shall be on an unreserved, first-come, first-served basis. 

  

	 	iv.	 Neither Landlord nor the Operator shall be responsible for money, jewelry, automobiles or other personal
property lost in or stolen from the Parking Facilities regardless of whether such loss or theft occurs when the Parking Facilities or other areas therein are locked or otherwise secured. Except as caused by the negligence or willful misconduct
of Landlord and without limiting the terms of the preceding sentence, Landlord shall not be liable for any loss, injury or damage to persons using the Parking Facilities or automobiles or other property therein, it being agreed that, to the fullest
extent permitted by law, the use of the Spaces shall be at the sole risk of Tenant and its employees. 

  

	 	v.	 Landlord or its Operator shall have the right from time to time to designate the location of the Spaces and to
promulgate reasonable rules and regulations regarding the Parking Facilities, the Spaces and the use thereof, including, but not limited to, rules and regulations controlling the flow of traffic to and from various parking areas, the angle and
direction of parking and the like. Tenant shall comply with and cause its employees to comply with all such rules and regulations and all reasonable additions and amendments thereto of which Tenant is given prior written notice.

  
 F-1 

	 	vi.	 Except for emergency repairs, Tenant and its employees shall not perform any work on any automobiles while
located in the Parking Facilities or on the Property. If it is necessary for Tenant or its employees to leave an automobile in the Parking Facilities overnight, Tenant shall provide Landlord with prior notice thereof designating the license
plate number and model of such automobile. 

  

	 	vii.	 Landlord or the Operator shall have the right to temporarily close the Parking Facilities or certain areas
therein in order to perform necessary repairs, maintenance and improvements to the Parking Facilities. Landlord shall use commercially reasonable efforts to return the affected portion of the Parking Facility to its full use as quickly as reasonably
possible. 

  

	 	viii.	 Tenant shall not assign, sublease or transfer any of its rights under this Section 1 without the consent
of Landlord, other than in connection with a Permitted Transfer pursuant to Article 11 of the Lease. 

  

	 	ix.	 Landlord may elect to provide parking cards or keys to control access to the Parking Facilities. In such event,
Landlord shall provide Tenant with one card or key for each Space that Tenant is leasing hereunder, provided that Landlord shall have the right to require Tenant or its employees to place a deposit on such access cards or keys and to pay a fee for
any lost or damages cards or keys. 

  

	 	b.	 Shuttle Service and Bike Amenities. If and for so long as Landlord, in its discretion, provides the
following Building amenities for the shared use of Building occupants (collectively, the “Amenities”): (i) shuttle service between the Building and South Station in Boston (the “Shuttle Service”), (ii) Blue Bike
service at the entrance to the Property, and (iii) bike storage racks, Tenant shall have the non-exclusive right to use such Amenities, subject to availability and to any reasonable rules and regulations
promulgated by Landlord (including, without limitation, allocation of amenities to various tenants) from time to time with respect thereto and generally applicable to the users thereof of which Tenant is given prior written notice. Landlord shall
provide the Shuttle Service for the Building pursuant to a schedule reasonably designated by Landlord. Tenant acknowledges and agrees that the costs and expenses of operating and maintaining the Amenities as applicable shall be included in Expenses.
Tenant further acknowledges and agrees that Landlord shall have no obligation to provide or maintain any Amenities; provided, however, that Landlord shall not have the right to discontinue the Shuttle Service unless Landlord determines, in its
reasonable business judgment, that the Shuttle Service is not being sufficiently used and it would be economically prudent to discontinue the Shuttle Service, in which event Landlord shall give Tenant at least six (6) months’ advance
notice of any permanent discontinuance of the Shuttle Service. Tenant also acknowledges and agrees that Landlord shall have the right to relocate the bike storage racks and to make reasonable modifications thereto as determined by Landlord in its
reasonable business judgment based on the then usage thereof. 

  

	2.	 Right of First Offer. As used herein, the “First Offer Space” shall mean the
balance of the northern section of the first (1st) floor of the Building, as depicted on Schedule F-1 attached hereto. 

 

	 	a.	 Landlord’s ROFO Notice. Subject to the initial
lease-up (with respect to the currently vacant parts of the First Offer Space) and the Superior Rights (as defined below), before hereafter entering into a lease for the entire First Offer Space (and not just
a portion thereof) with a third party (other than the then existing tenant or other occupant of such space), Landlord shall give Tenant a notice (the “Landlord’s ROFO Notice”) specifying the terms on which Landlord would be
willing to lease the First Offer Space to Tenant in accordance with the terms of this Section 2. 

  
 F-2 

 Notwithstanding anything in this Section 2 to the contrary, Tenant’s one-time right of first offer hereunder with respect to the First Offer Space shall be subject and subordinate to the “Superior Rights”, which shall include and refer to Landlord’s right from
time to time to lease all or part of the First Offer Space to (i) any tenant with existing rights to such First Offer Space as of the Effective Date, (ii) any tenant that is granted rights for all or part of the currently vacant First
Offer Space in the initial leases entered into by Landlord pursuant to the initial lease up, and (iii) any third party for temporary use or occupancy of any part of the First Offer Space under a license or other temporary occupancy agreement
for a term not to exceed two (2) years (e.g., for temporary swing space or storage in connection with the leasing or construction of other space in the Building). 
  

	 	b.	 Tenant’s Response. Within five (5) Business Days after receipt of Landlord’s ROFO
Notice, Tenant shall, by written notice delivered to Landlord, either (i) reject Landlord’s ROFO Notice, or (ii) reject Landlord’s ROFO Notice but unconditionally and irrevocably offer to lease the entire First Offer Space from
Landlord for its own use at a Base Rent rate proposed in Tenant’s response and otherwise on the terms set forth in Landlord’s ROFO Notice, or (iii) unconditionally and irrevocably accept Landlord’s offer to lease the entire First
Offer Space from Landlord for its own use on the terms set forth in Landlord’s ROFO Notice. The failure by Tenant to timely respond as aforesaid shall be deemed Tenant’s rejection of Landlord’s ROFO Notice for the First Offer Space
under clause (i). 

 If Landlord’s ROFO Notice is rejected under clause (i) above (or deemed rejected by
Tenant’s failure to timely respond), then Tenant shall have no further rights with respect to the First Offer Space, this Section 2 shall terminate automatically, and Landlord may enter into any lease or leases for all or part of the First
Offer Space on such terms and conditions (including without limitation extension or expansion rights with respect to the First Offer Space or any portion thereof) as Landlord determines in its sole discretion. 

If Tenant timely offers to lease the First Offer Space on alternative terms as set forth in clause (ii) above, then Landlord may, by
written notice delivered within thirty (30) days of receipt thereof, accept or decline such offer (the failure to so respond being deemed Landlord’s election to decline Tenant’s offer). 

 

	 	c.	 Confirmatory Instrument. If the offer to lease the First Offer Space is accepted as provided above,
the First Offer Space shall, subject to the provisions set forth below and without further action by the parties, be leased by Tenant on the accepted terms and otherwise on all of the terms of the Lease in effect immediately prior to such expansion,
provided that, at the request of either party, Landlord and Tenant shall promptly execute and deliver an agreement confirming such expansion of the Premises and the estimated date the Premises are to be expanded pursuant to this Section with a
provision for establishing the effective date of such expansion based on actual delivery. Except as expressly set forth in such agreement, Landlord’s failure to deliver, or delay in delivering, all or any part of such First Offer Space,
for any reason, shall not give rise to any liability of Landlord, shall not alter Tenant’s obligation to accept such space when delivered, shall not constitute a default of Landlord, and shall not affect the validity of the Lease.

  
 F-3 

	 	d.	 General. Notwithstanding any provision of this Section to the contrary, Tenant’s rights under
this Section shall be void, at Landlord’s election, if (i) Tenant is in Default under the Lease, after any applicable notice and cure periods have expired, at the time Landlord would otherwise give a Landlord’s ROFO Notice to Tenant
hereunder or at the time Tenant makes any election with respect to the First Offer Space under this Section or at the time the First Offer Space would be added to the Premises, or (ii) any Transfer has occurred under Article 11 of the Lease
(other than a Permitted Transfer). 

  

	 	3.	 Hazardous Materials.  

(a) Hazardous Materials. As used herein, the term “Hazardous Materials” shall mean any wastes, materials or substances
(whether in the form of liquids, solids, aerosols or gases, and whether or not air-borne), specifically including live organisms, viruses and fungi, medical waste and
so-called “bio-hazard” materials, which are or are deemed to be (i) pollutants or contaminants, or which are or are deemed to be hazardous, toxic,
ignitable, reactive, corrosive, infectious, dangerous, harmful or injurious, or which present a risk to public health or to the environment, or which are or may become regulated by or under the authority of any applicable local, state (including,
without limitation, Chapter 21E of the General Laws of the Commonwealth of Massachusetts and 780 CMR 307) or federal laws, judgments, ordinances, orders, rules, regulations, codes or other governmental restrictions, guidelines or requirements, any
amendments or successor(s) thereto, replacements thereof or publications promulgated pursuant thereto, including, without limitation, any such items or substances which are or may become regulated by any of the Environmental, Health and Safety Laws
(as hereinafter defined); (ii) listed as a chemical known to the Commonwealth of Massachusetts to cause cancer or reproductive toxicity; or (iii) a pesticide, petroleum, including crude oil or any fraction thereof, asbestos or an
asbestos-containing material, a polychlorinated biphenyl, radioactive material, urea formaldehyde, biohazard material, mold, fungus, virus, living organisms or other medical waste. 

(b) Environmental, Health and Safety Laws. In addition to the laws referred to in Section 3(a) above, the term
“Environmental, Health and Safety Laws” shall be deemed to include, without limitation, 33 U.S.C. Section 1251 et seq., 42 U.S.C. Section 6901 et seq., 42 U.S.C. Section 7401 et
seq., 42 U.S.C. Section 9601 et seq., the Emergency Planning and Community Right to Know Act (EPCRTKA) 42 U.S.C. § 11001-11050 and all local, state and federal laws, judgments, ordinances, orders, rules, regulations,
codes and other governmental restrictions, guidelines and requirements, any amendments and successors thereto, replacements thereof and publications promulgated pursuant thereto, which deal with or otherwise in any manner relate to, Hazardous
Materials, air or water quality, air emissions, soil or ground conditions, environmental, health and safety, including, but not limited to, industrial hygiene, soil, water, or environmental conditions or other environmental, health and safety
matters of any kind. In addition to the foregoing, Tenant shall comply with all terms, conditions and guidelines contained in all licenses, permits and approvals applicable to Tenant’s laboratory and vivarium uses and agrees to further
acknowledge such agreement to so comply in writing upon request of Landlord. 
 (c) Use of Hazardous Materials; Licenses; Audit
Reports. Tenant agrees that during the Term of this Lease, there shall be no use, presence, disposal, storage, generation, leakage, treatment, manufacture, import, handling, processing, release, or threatened release of Hazardous Materials on,
from or under the Premises, the Building or the Property by Tenant or any of Tenant’s Parties (individually and collectively, “Hazardous Use”) except for Hazardous Materials which are typically used in the operation of offices
or laboratories, provided that such Hazardous Materials are stored, used and disposed of in strict compliance with all applicable Environmental, Health and Safety Laws and will all BSL-2 requirements and
protocol, and that subject to the provisions of this Section 3(c) below, the use, storage, handling, processing or generation of any and all Hazardous Materials shall have been approved in writing by Landlord in advance. Tenant represents and
warrants that the list attached hereto as Schedule F-2 is a complete list of all Hazardous Materials and quantities to be used and stored by Tenant in the Premises as of the Term Commencement Date,
which list of Hazardous Materials and quantities is hereby 

  
 F-4 

 
approved by Landlord. Tenant shall not use or permit to exist in the Premises any Hazardous Materials other than those listed on Schedule F-2 (the
“Permitted Hazardous Materials and Quantities”); provided, however, that, subject to the following provisions of this Section 3, Tenant may make reasonable adjustments to the types of Hazardous Materials and quantities used or
stored in the Premises, as required by Tenant’s business operations, so long as: 
 (i) such types and quantities of Hazardous Materials
are materially consistent with the types and quantities of the Permitted Hazardous Materials and Quantities and are necessary to Tenant’s business and are otherwise stored, used and disposed of in strict compliance with all applicable
Environmental, Health and Safety Laws; and 
 (ii) Tenant has obtained and maintains all licenses, permits, registrations and consents
required by applicable law (including, without limitation, Environmental, Health and Safety Laws) (collectively, the “Required Permits”) to use or store all such types and quantities of Hazardous Materials in the Premises; and 

(iii) Within five (5) days after Landlord’s written request, Tenant shall have provided Landlord with a revised, updated Schedule F-2 reflecting the reasonable adjustments made by Tenant, and which shall constitute a complete list of all Hazardous Materials and quantities used and stored by Tenant in the Premises as of the date of such
revised, updated Schedule F-2. 
 Notwithstanding the foregoing, under no circumstances shall
Tenant use or permit to exist in the Premises, or obtain any license, permit, registration or consent from any local, federal or state governmental agency, authority, commission, board or the like (each, a “Governmental Authority”)
permitting Tenant to use or store in the Premises, any of the Hazardous Materials or classes thereof listed and/or identified on Schedule F-3 attached hereto. 

Tenant shall promptly provide Landlord upon Landlord’s request with copies of any and all licenses, permits, registrations or consents
relating to the use, storage or disposal of Hazardous Materials that are obtained, modified or renewed during the Term. In addition, Tenant shall complete a Hazardous Materials audit checklist, in a form reasonably acceptable to Landlord, at least
annually or at sooner intervals upon Landlord’s written request if Landlord has reason to believe that Tenant has violated the provisions of this Section 3 or other provisions of the Lease governing Hazardous Materials. In addition, Tenant
shall not permit the imposition of any lien by Governmental Authority or other party to secure payment for damages caused by, or the recovery of any costs or expenses for, the cleanup, remediation, investigation, transportation, disposal, release or
threatened release of any Hazardous Material. Tenant also shall provide Landlord with prompt written notice in reasonable detail of (i) any release or threatened release at, on, under or from the Premises, Building or Property by Tenant or one
of Tenant’s Parties or of which Tenant becomes aware which would reasonably be expected to exceed reportable quantities or give rise to a violation of any Environmental, Health and Safety Laws, or which could result in a legal obligation to
investigate or remediate Hazardous Materials pursuant to, Environmental, Health and Safety Laws or any provisions of this Lease; (ii) any notice received by Tenant, or of which Tenant has knowledge, from any Governmental Authority in connection
with any such release or any violation of Environmental, Health and Safety Laws, or in connection with the presence or alleged presence of any Hazardous Materials at the Premises, Building or Property; or (iii) any incurrence of expense by any
Governmental Authority or other party in connection with the assessment, containment, disposal or removal of any Hazardous Materials located at, on, in, or under, or emanating from the Premises. 

  
 F-5 

 Within ten (10) Business Days of Landlord’s request from time to time, Tenant
shall provide Landlord with an updated list of all Hazardous Materials, including quantifies used and such other information as Landlord may reasonably request, used or stored by Tenant in the Premises or otherwise in the Property. Notwithstanding
the foregoing, with respect to any of Tenant’s Hazardous Materials which Tenant does not properly handle, store or dispose of in compliance with all applicable Environmental, Health and Safety Laws, all
BSL-2 requirements and protocols, Tenant shall, upon written notice from Landlord, no longer have the right to bring such Hazardous Materials into, or use or store such Hazardous Materials in, the Premises,
the Building or the Property until Tenant has demonstrated, to Landlord’s reasonable satisfaction, that Tenant has implemented programs to thereafter properly handle, use, store or dispose of such Hazardous Materials. For the purposes of this
Section 3(c), the term Hazardous Use shall include Hazardous Use(s) on, from or under the Premises by Tenant or any of its directors, officers, employees, shareholders, partners, licensees, invitees, agents, contractors or occupants
(collectively, “Tenant’s Parties”), whether known or unknown to Tenant, and whether occurring and/or existing during or prior to the commencement of the Term of this Lease. 

(d) Compliance. During the Term of this Lease, Tenant, at its sole cost and expense, shall comply with, and shall not be in violation
of, any Environmental, Health and Safety Laws. 
 (e) Inspection and Testing by Landlord. Landlord shall have the right at all times
during the Term of this Lease to (i) inspect the Premises and to (ii) conduct tests and investigations to determine whether Tenant is in compliance with the provisions of this Section. Except in case of emergency, Landlord shall give
reasonable notice to Tenant before conducting any such inspections, tests, or investigations. The cost of all such inspections, tests and investigations shall be borne by Landlord, unless it is determined that Tenant is in breach of Section 3
or other provisions of the Lease governing Hazardous Materials, in which case such costs shall be borne by Tenant. Neither any action nor inaction on the part of Landlord pursuant to this Section 3(e) shall be deemed in any way to release
Tenant from, or in any way modify or alter, Tenant’s responsibilities, obligations, and/or liabilities incurred pursuant to Section 3 hereof. 

(f) Decommissioning. On or before the date that Tenant, and anyone claiming by, through or under Tenant, vacates the Premises, and on or
before the date that Tenant delivers the Premises to Landlord, Tenant shall, to the reasonable satisfaction of Landlord: 

(i) cause the Premises to be decommissioned and decontaminated in accordance with the regulations of the U.S. Nuclear
Regulatory Commission and/or the Massachusetts Department of Public Health for the control of radiation, cause the Premises to be released for unrestricted use by the Radiation Control Program of the Massachusetts Department of Public Health for the
control of radiation, and deliver to Landlord the report of a certified industrial hygienist stating that he or she has examined the Premises (including visual inspection, Geiger counter evaluation and airborne and surface monitoring) and found no
evidence of residual radioactive materials, radiation above natural background levels, or violation of any Environmental Health and Safety Laws; and deliver to Landlord the report of a certified industrial hygienist confirming, in substance, that he
or she has examined the Premises (including visual inspection, onsite screening and laboratory analysis) and found no evidence that the Premises contains any Hazardous Materials, no building materials or components have been adversely impacted by
Hazardous Materials, or is otherwise in violation of any Environmental Health and Safety Law; 
 (ii) provide Landlord with a
completed and executed decommissioning checklist in the form of Schedule F-4 (the “Laboratory Decommissioning Checklist”), 

  
 F-6 

 (iii) decommission all laboratory space in and about the Premises, including
without limitation, to the extent required to deliver a complete Laboratory Decommissioning Checklist, and otherwise in accordance with applicable Laws, and to the reasonable satisfaction of Landlord (but solely for purposes of Landlord’s
compliance with its contractual obligations to other parties, including without limitation, the Ground Lessor and any Mortgagee) and to the satisfaction of any Governmental Authority involved in the closure, 

(iv) terminate all licenses, permits, registrations and consents obtained by Tenant for the use or storage of Hazardous
Materials at the Premises, 
 (v) remove from the Premises and dispose of all universal waste, Hazardous Materials stored in
the Premises in compliance with applicable Laws (including, without limitation, all Environmental, Health and Safety Laws), 

(vi) decontaminate all surfaces and fixed equipment in the Premises, 

(vii) review and remediate and properly dispose of any specific Hazardous Materials that may be associated with any laboratory
fixtures used by Tenant in the Premises, and 
 (viii) provide to Landlord a copy of its most current universal, chemical,
radiological and biological waste removal manifests and a certification from Tenant executed by an officer of Tenant that no Hazardous Materials or other potentially dangerous or harmful chemicals brought onto the Premises from and after the date
that Tenant first took occupancy of the Premises remain in the Premises. 
 (g) Tenant Indemnification. Subject to the waiver set
forth in Section 13.04 of the Lease, Tenant shall indemnify, hold harmless, and, at Landlord’s option (with such attorneys as Landlord may approve in advance and in writing), defend Landlord and Landlord’s officers, directors,
shareholders, partners, members, managers, employees, contractors, property managers, agents and mortgagees and other lien holders, from and against any and all Losses (including without limitation, any costs of cleanup, remediation, removal and
restoration) arising from or related to: (a) any violation or alleged violation by Tenant or any of Tenant’s Parties of any of the requirements, ordinances, statutes, regulations or other laws referred to in this Section 3, including,
without limitation, the Environmental, Health and Safety Laws; (b) any breach of the provisions of this Section 3 by Tenant or any of Tenant’s Parties; or (c) any Hazardous Use on, about or from the Premises of any Hazardous
Material approved by Landlord under this Lease. The indemnification of Landlord by Tenant includes, without limitation, reasonable costs incurred in connection with any investigation of site conditions or any cleanup, remedial, removal or
restoration work required by any federal, state or local governmental agency or political subdivision because of Hazardous Material present in the soil or ground water on or under the Premises based upon the circumstances identified in the first
sentence of this Section 3(g). The indemnification and hold harmless obligations of Tenant under this Section 3(g) shall survive any termination of this Lease. 

(h) Landlord Indemnification. If there exists any levels of Hazardous Materials on or about the Premises as of the Term Commencement
Date that are in violation of any Environmental, Health and Safety Laws, then Landlord shall be responsible for the remediation of such pre-existing levels of Hazardous Materials, except to the extent such
violation was caused or exacerbated by any act, omission or negligence of Tenant or any of the Tenant Parties, and subject to the waiver set forth in Section 13.04 of the Lease, Landlord shall indemnify, defend and hold Tenant harmless from any
and all costs related to such remediation. 

  
 F-7 

	 	4.	 Roof Rights. 

(a) Subject to availability, any existing encumbrances and the terms and conditions hereof, Tenant shall have the right, at no additional
charge, but otherwise subject to the terms and conditions of this Lease, to use certain surface space on the roof of the Building, in a location designated by Landlord and reasonably acceptable to Tenant (the “Roof Area”), for the
purpose of installing (in accordance with Article 8), operating and maintaining telecommunications equipment, supplemental backup power devices and Supplemental HVAC devices (collectively, the “Tenant’s Roof
Equipment”) approved by Landlord. 
 (b) Tenant shall install Tenant’s Roof Equipment at its sole cost and expense, at such
times and in such manner as Landlord may reasonably designate and in accordance with all of the provisions of this Lease, including without limitation Article 8. Tenant shall not install or operate Tenant’s Roof Equipment until it receives
prior written approval of the plans for such work (including the manner in which the Tenant’s Roof Equipment are attached to the roof of the Building and the manner in which any cables are run to and from the Tenant’s Roof Equipment) in
accordance with Article 8. Landlord may withhold approval if the installation or operation of Tenant’s Roof Equipment reasonably would be expected to damage the Base Building. Tenant shall be solely responsible for obtaining all necessary
governmental and regulatory approvals and for the cost of installing, operating, maintaining and removing the Tenant’s Roof Equipment. In addition, if required by any governmental approvals or if at any time Landlord, in its reasonable
discretion deems it necessary, Tenant shall provide and install, at Tenant’s sole cost and expense, appropriate aesthetic screening, reasonably satisfactory to Landlord, for the Tenant’s Roof Equipment. 

Tenant shall engage Landlord’s roofer before beginning any rooftop installations or repairs of Tenant’s Roof Equipment, whether
under this Section 4 or otherwise, and shall always comply with any roof warranty governing the protection of the roof and modifications to the roof. Tenant shall use reasonable efforts to obtain a letter from Landlord’s roofer following
completion of such work stating that the roof warranty remains in effect, if applicable. Tenant, at its sole cost and expense, shall inspect the Roof Area periodically and correct any loose bolts, fittings or other appurtenances and shall repair any
damage to the roof caused by the installation or operation of Tenant’s Roof Equipment. Tenant shall pay Landlord following a written request and invoice therefor, within thirty (30) days after receipt of such invoice, (i) all
applicable taxes or governmental charges, fees, or impositions imposed on Landlord because of Tenant’s use of the Roof Area and (ii) the amount of any increase in Landlord’s insurance premiums as a result of the installation of
Tenant’s Roof Equipment. 
 (c) Tenant agrees that the installation, operation and removal of Tenant’s Roof Equipment shall be at
its sole risk. Subject to the waiver set forth in Section 13.04 of the Lease and except to the extent caused by the negligence or willful misconduct of Landlord or any Landlord Related Parties, Tenant shall indemnify and defend Landlord and the
Landlord Related Parties against any liability, claim or cost, including reasonable attorneys’ fees, incurred in connection with the loss of life, personal injury, damage to property or business or any other loss or injury (except to the extent
due to the negligence or willful misconduct of Landlord or a Landlord Related Party) arising out of the installation, use, operation, or removal of Tenant’s Roof Equipment by Tenant or its employees, agents, contractors, or invitees, including
any liability arising out of Tenant’s violation of this Section 4. Landlord assumes no responsibility for interference in the operation of Tenant’s Roof Equipment caused by other tenants’ equipment, or for interference in the
operation of other tenants’ equipment caused by Tenant’s Roof Equipment. The provisions of this Section 4 shall survive the expiration or earlier termination of this Lease. 

(d) Upon the expiration or earlier termination of the Lease, Tenant, at its sole cost and expense, shall (i) remove Tenant’s Roof
Equipment from the Roof Area in accordance with the provisions of this Lease and (ii) repair any damage caused by such removal. If Tenant does not remove Tenant’s Roof Equipment when so required, Landlord may remove and dispose of it and
charge Tenant for all costs and expenses incurred. 

  
 F-8 

 (e) It is understood and agreed that the installation, maintenance, operation and removal of
the Tenant’s Roof Equipment and aesthetic screening, if any, is not permitted to damage the Building or the roof thereof, nor interfere with the use of the Building and roof by Landlord. Tenant shall be responsible for any damage to the roof or
any other part of the Building caused by Tenant or any of its agents, contractors or representatives in the exercise of Tenant’s rights under this Section 4. If Tenant’s Roof Equipment (i) causes physical damage to the Base
Building, (ii) materially interferes with any telecommunications, mechanical or other systems located at or servicing the Building, or (iii) interferes with any other service provided to other tenants in the Building, in each case in
excess of that permissible under F.C.C. or other regulations (to the extent that such regulations apply and do not require such tenants or those providing such services to correct such interference or damage), Tenant shall within ten
(10) Business Days of notice of a claim of interference or damage cooperate with Landlord or any other tenant or third party making such claim to determine the source of the damage or interference and effect a prompt solution at Tenant’s
expense (if Tenant’s Roof Equipment caused such interference or damage). In the event Tenant disputes in good faith Landlord’s allegation that Tenant’s Roof Equipment is causing a problem with the Building (including, but not limited
to, the electrical, HVAC, and mechanical systems of the Building) and/or any other Building tenants’ equipment in the Building, in writing delivered within ten (10) Business Days of receiving Landlord’s notice claiming such
interference, then Landlord and Tenant shall meet to discuss a solution, and if within seven (7) days of their initial meeting Landlord and Tenant are unable to resolve the dispute, then the matter shall be submitted to arbitration in
accordance with the provisions set forth below. 
 The parties shall direct the Boston office of the AAA to appoint an arbitrator who shall
have a minimum of ten (10) years’ experience in commercial real estate disputes and who shall not be affiliated with either Landlord or Tenant. Both Landlord and Tenant shall have the opportunity to present evidence and outside consultants
to the arbitrator. 
 The arbitration shall be conducted in accordance with the commercial real estate arbitration rules of the AAA insofar
as such rules are not inconsistent with the provisions of this Lease (in which case the provisions of this Lease shall govern). The cost of the arbitration (exclusive of each party’s witness and reasonable attorneys’ fees, which shall be
paid by such party) shall be borne equally by the parties. 
 Within ten (10) days of appointment, the arbitrator shall determine
whether or not Tenant’s Roof Equipment is causing a problem with the Building and/or any other Building tenants’ equipment in the Building, and the appropriate resolution, if any. The arbitrator’s decision shall be final and binding
on the parties. If Tenant shall fail to implement the arbitrator’s decision within ten (10) days after it is issued (provided, however, if Tenant cannot reasonably complete the implementation of such required actions within such ten-(10)-day period, Tenant shall be allowed additional time as is reasonably necessary to cure such failure so long as Tenant begins the cure within such ten-(10)-day period
and diligently pursues the cure to completion), Landlord may at any time thereafter (i) declare a Default and/or (ii) relocate the item(s) of Tenant’s Roof Equipment in dispute in a manner consistent with the arbitral decision. 

(f) Based on Landlord’s good faith determination that such a relocation is necessary, Landlord reserves the right to cause Tenant to
relocate Tenant’s Roof Equipment located on the roof to comparably functional space on the roof by giving Tenant prior notice of such intention to relocate. Landlord agrees to pay the reasonable cost of moving Tenant’s Roof Equipment to
such other space, taking such other steps necessary to ensure comparable functionality of Tenant’s Roof Equipment, and finishing such space to a condition comparable to the then condition of the current location of Tenant’s Roof Equipment.
Tenant shall arrange for the relocation of Tenant’s Roof Equipment within ninety (90) days after Landlord’s notice. In the event Tenant fails to arrange for said relocation within the ninety (90) day period, Landlord shall have the
right to arrange for the relocation of Tenant’s Roof Equipment at Landlord’s expense. 

  
 F-9 

 (g) Tenant agrees that if Landlord makes or plans to make any repairs, alterations,
modifications, additions or improvements to the Building (including any repairs or replacement of the roof, other components of the Base Building) that will require an adjustment or modification to the Roof Area or temporary removal of the
Tenant’s Roof Equipment in order to perform such work, Landlord shall be responsible, at Landlord’s cost, for the temporary removal and storage of such Tenant’s Roof Equipment and any
re-installation thereof in the Roof Area after completion of such work by Landlord. Landlord shall give Tenant at least ninety (90) days’ prior written notice of any request for such removal of the
Tenant’s Roof Equipment, except in cases of emergency for which no prior written notice shall be required. 
 (h) Notwithstanding
anything to the contrary herein, the Tenant’s Roof Equipment may be used only in direct support of Tenant’s operations at the Premises, and Tenant shall not be permitted to license or grant other parties the right to use the same, nor
shall Tenant allow its service providers to use the Roof Area and/or Tenant’s Roof Equipment to provide services to any other party, or to facilitate the provision of services by any other service provider. Landlord hereby reserves the right to
grant roof rights to other tenants or telecommunications service providers from time to time. Tenant shall also cooperate with any uniformly applied reasonable rooftop management policy and any telecommunications management policy which Landlord may
implement for the Building of which Tenant is given prior written notice. 
 Tenant’s rights under this Section 4 are personal to
the original Tenant and any Permitted Transferees. 
  

	 	5.	 Shared Generator. 

(a) Landlord shall install a new multi-tenant emergency generator (the “Shared Generator”) for the non-exclusive use of the tenants and other occupants of the first (1st) floor of the Building (collectively, the “First Floor Tenants”). Landlord
shall install the Shared Generator as part of the Base Building Work. Notwithstanding anything to the contrary, Tenant requested a Change Order to upgrade the Shared Generator to a 350 kVa generator to accommodate Tenant’s additional generator
capacity needs (the “Generator Upgrade Change Order”), and Landlord approved such Generator Upgrade Change Order subject to Tenant’s obligation to reimburse Landlord for its proportionate share (based upon its allocation of
generator capacity among the First Floor Tenants), which proportionate share is fifty percent (50%) (the “Tenant’s Generator Share”), of the cost of the Generator Upgrade Change Order. Tenant shall pay Tenant’s Generator
Share of the Generator Upgrade Change Order as provided in Exhibit C. Landlord shall be responsible for the operation, maintenance and repair of the Shared Generator, and each of the First Floor Tenants shall reimburse Landlord, as additional
rent, for its proportionate share (based upon its allocation of generator capacity among the First Floor Tenants), which proportionate share for the Premises is Tenant’s Generator Share; provided, however, that if replacement of the entire
Shared Generator (as opposed to replacement of component parts) is necessary, such replacement shall be performed by Landlord at Landlord’s sole cost. 

(b) Landlord shall provide Tenant with a total allowable back-up generator capacity of 94 kW for the
Premises. Landlord’s sole obligation for providing emergency back-up power or alternative sources of power to Tenant shall be to provide the Shared Generator with not less than the stated capacity
thereof as set forth herein. 

  
 F-10 

 (c) Notwithstanding Tenant’s non-exclusive
right to use the Shared Generator in common with other First Floor Tenants, Tenant hereby acknowledges and agrees that it shall do so at Tenant’s sole risk and Landlord shall not in any way be liable or responsible to Tenant for any loss,
damage or expense which Tenant may sustain or incur if the Shared Generator should fail to operate properly or as intended or if the quality, character or supply of electrical energy therefrom is changed or is no longer available or suitable for
Tenant’s requirements, Tenant hereby holding Landlord harmless for all of such loss, damage and expense. 
 6. Negative
Conditions. In light of the fact that the Premises are in a multi-tenant Building, Tenant shall not perform any act or carry on any practice or operate any machinery or equipment which may injure the Premises or any other part of the Building,
or cause any odors or vibrations, or noise (including, but without limitation, the use of grinders), or constitute a nuisance to any other occupant or other persons in the Building, and Tenant shall prevent any odors, smoke, vibration, noise or
water from emanating from the Premises and shall prevent the emanation of strong odor, smoke, vibration, noise or water (a “Negative Condition”). In addition to the foregoing, “Negative Conditions” shall include any other
objectionable emissions from the Premises for which Landlord has received good faith complaints from other tenants or occupants of the Building on more than two (2) separate occasions or a complaint from the police or any other governmental
authority having jurisdiction at any time. Upon Landlord’s written notice to Tenant that such a Negative Condition exists, Tenant shall thereafter promptly undertake actions to remedy such Negative Condition (which actions may include the
installation, operation, maintenance and inspection of odor, noise, vibration, water and/or smoke control devices, and the establishment of effective control procedures to eliminate such odors, noise, vibration, smoke, or water or other
objectionable emissions) within five (5) days following receipt of such notice, or such longer period of time as is reasonably necessary to remedy such Negative Condition so long as Tenant promptly undertakes to remedy any such condition and
diligently and continuously pursues such remedy to completion within forty-five (45) days of receipt of such notice from Landlord. Tenant shall cease the activity causing the Negative Condition upon receipt of Landlord’s notice until the
Negative Condition has been remedied. The means Tenant uses to prevent such migration may include but not be limited to: (i) operating the HVAC systems, including any special exhaust systems, under negative pressure, (ii) sealing all
openings in the demising walls, (iii) providing continuous waterproof base (per Landlord’s criteria) along the demising walls in the showers (if any), kitchen and laboratory areas in the Premises, and (iv) placing machines or
equipment in settings of cork, rubber or spring type noise and vibration eliminators. If any such Negative Condition is not so remedied, Landlord may, at its discretion either: (i) cure such Negative Condition and charge Tenant for any cost and
expense incurred by Landlord therefor, and Tenant shall then pay such amount as within thirty (30) days after its receipt of an invoice thereof, or (ii) treat Tenant’s failure to remedy such Negative Condition as a Default, entitling
Landlord to any of its remedies pursuant to the terms of this Lease. 

  
 F-11 

 Schedule F-1 

OUTLINE AND LOCATION OF FIRST OFFER SPACE 

Schedule F-3 is intended only to show the general layout of the First Offer Space as of the beginning of
the Term of this Lease. The depiction of interior windows, cubicles, modules, furniture and equipment in this Exhibit is for illustrative purposes only, but does not mean that such items exist. Landlord is not required to provide, install or
construct any such items. It does not in any way supersede any of Landlord’s rights set forth in the Lease with respect to arrangements and/or locations of public parts of the Building and changes in such arrangements and/or locations. It is
not to be scaled; any measurements or distances shown should be taken as approximate. The inclusion of elevators, stairways electrical and mechanical closets, and other similar facilities for the benefit of occupants of the Building does not mean
such items are part of the First Offer Space. 
 [See Attached Floor Plan] 

  
 F-12 

 

 

  
 F-13 

 Schedule F-2 

INITIAL LIST OF APPROVED HAZARDOUS MATERIALS AND QUANTITIES 

[Omitted] 

  
 F-14 

 Schedule F-3 

PROHIBITED HAZARDOUS MATERIALS 

[Omitted] 

  
 F-15 

 Schedule F-4 

Tenant Laboratory Decommissioning Checklist 

[Omitted] 

  
 F-16 

 EXHIBIT G 

LETTER OF CREDIT REQUIREMENTS 

This Exhibit is attached to and made a part of the Lease Agreement (the “Lease”) by and between OPG MP PARCEL OWNER (DE) LLC,
a Delaware limited liability company (“Landlord”), and IKENA ONCOLOGY, INC., a Delaware corporation (“Tenant”), for space in the Building located at 645 Summer Street, Boston, MA
02210. Capitalized terms used but not defined herein shall have the meanings given in the Lease. 
 The Letter of Credit (as defined in
the Lease) shall be for the amount set forth in Section 1 of the Lease, subject to the terms of Section 6 of the Lease. The Letter of Credit (i) shall be irrevocable and shall be issued by a commercial bank that has a financial
condition reasonably acceptable to Landlord and be able to be drawn upon in Boston, Massachusetts or New York City or by facsimile presentation, (ii) shall require only the presentation to the issuer of a certificate of the holder of the Letter
of Credit stating that Landlord is entitled to draw on the Letter of Credit pursuant to the terms of the Lease, (iii) shall be payable to Landlord or its successors in interest as the Landlord and shall be freely transferable without cost to
any such successor or any lender holding a collateral assignment of Landlord’s interest in the Lease, (iv) shall be for an initial term of not less than one year and contain a provision that such term shall be automatically renewed for
successive one-year periods unless the issuer shall, at least thirty (30) days prior to the scheduled expiration date, give Landlord notice of such nonrenewal, and (v) shall otherwise be in form and
substance reasonably acceptable to Landlord. Notwithstanding the foregoing, the term of the Letter of Credit for the final period shall be for a term ending not earlier than the date forty five (45) days after the last day of the
Term. In the event that the issuer ceases to be reasonably acceptable to Landlord, due to a deterioration in its financial condition or change in status that threatens to compromise Landlord’s ability to draw on the Letter of Credit as
determined in good faith by Landlord, then Tenant shall provide a replacement Letter of Credit from an issuer satisfying the terms of this Exhibit within thirty (30) days after Landlord’s notice of such event. 

Landlord shall be entitled to draw upon the Letter of Credit for its full amount or any portion thereof if (a) Tenant shall fail to
perform any of its obligations under the Lease after the expiration of any applicable notice and cure periods, or (b) not less than thirty (30) days before the scheduled expiration of the Letter of Credit, Tenant has not delivered to
Landlord a new Letter of Credit in accordance with this Exhibit. Without limiting the generality of the foregoing, Landlord may, but shall not be obligated to, draw on the Letter of Credit from time to time in the event of a bankruptcy filing
by or against Tenant and/or to compensate Landlord, in such order as Landlord may determine, for all or any part of any unpaid rent, any damages arising from any termination of the Lease in accordance with the terms of the Lease, and/or any damages
arising from any rejection of the Lease in a bankruptcy proceeding commenced by or against Tenant. Landlord may, but shall not be obligated to, apply the amount so drawn to the extent necessary to cure Tenant’s failure.

Any amount of the Letter of Credit drawn in excess of the amount applied by Landlord to cure any such failure shall be held by Landlord as a
cash security deposit for the performance by Tenant of its obligations under the Lease. Any cash security deposit may be mingled with other funds of Landlord and no fiduciary relationship shall be created with respect to such deposit, nor shall
Landlord be liable to pay Tenant interest thereon. If Tenant shall fail to perform any of its obligations under the Lease after the expiration of any applicable notice and cure periods, Landlord may, but shall not be obliged to, apply the cash
security deposit to the extent necessary to cure Tenant’s failure. After any such application by Landlord of the Letter of Credit or cash security deposit, as the case may be, Tenant shall reinstate the Letter of Credit to the amount
originally required to be maintained under the Lease, within ten (10) Business Days after Landlord’s written demand. Provided that Tenant is not then in default under the Lease, and no condition exists or event has occurred which
after the expiration of any applicable notice or 

  
 G-1 

 
cure period would constitute such a default, within forty five (45) days after the later to occur of (i) the payment of the final Rent due from Tenant or (ii) the later to occur of
the Term Expiration Date or the date on which Tenant surrenders the Premises to Landlord in compliance with Section 19 of the Lease and Section 3 of Exhibit F to the Lease, the Letter of Credit and any cash security deposit, to the
extent not applied, shall be returned to the Tenant, without interest. 
 In the event of a sale of the Building or lease, conveyance or
transfer of the Building, Landlord shall transfer the Letter of Credit or cash security deposit to the transferee. Upon such transfer, the transferring Landlord shall be released by Tenant from all liability for the return of such security, and
Tenant agrees to look to the transferee solely for the return of said security. The provisions hereof shall apply to every transfer or assignment made of the security to such a transferee. Tenant further covenants that it will not assign
or encumber or attempt to assign or encumber the Letter of Credit or the monies deposited herein as security, and that neither Landlord nor its successors or assigns shall be bound by any assignment, encumbrance, attempted assignment or attempted
encumbrance. 

  
 G-2 

 EXHIBIT H 

FORM OF SNDA 
 [Omitted] 

  
 H-3 

 EXHIBIT I 

FORM OF NDA 
 [Omitted] 

  
 I-4 

 EXHIBIT J 

BASELINE CONDITION 
 [Omitted] 

  
 J-1EX-10.1

 Exhibit 10.1 

[    ], 2021 
 CF Acquisition
Corp. VIII 
 110 East 59th Street 
 New York, NY 10022 

Re:    Initial Public Offering  

Ladies and Gentlemen: 
 This letter (this
“Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered into by and among CF Acquisition Corp.
VIII, a Delaware corporation (the “Company”), and Cantor Fitzgerald & Co. as representative (the “Representative”) of the several underwriters (each, an “Underwriter”
and collectively, the “Underwriters”), relating to an underwritten initial public offering (the “Public Offering”), of 23,000,000 of the Company’s units (including up to 3,000,000
units that may be purchased to cover over-allotments, if any) (the “Units”), each comprised of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common
Stock”), and one-fourth of one redeemable warrant. Each whole Warrant (each, a “Warrant”) entitles the holder thereof to purchase one share of Common Stock at a price
of $11.50 per share, subject to adjustment. The Units will be sold in the Public Offering pursuant to a registration statement on Form S-1 and prospectus (the “Prospectus”) filed by the
Company with the U.S. Securities and Exchange Commission (the “Commission”) and the Company has applied to have the Units listed on The Nasdaq Capital Market. Certain capitalized terms used herein are defined in paragraph 12
hereof. 
 In order to induce the Company and the Underwriters to enter into the Underwriting Agreement and to proceed with the Public
Offering and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, each of CFAC Holdings VIII, LLC (the “Sponsor”) and the undersigned individuals, each of whom is a member
of the Company’s board of directors and/or management team (each, an “Insider” and collectively, the “Insiders”), hereby agrees with the Company as follows: 

1. The Sponsor and each Insider agrees that if the Company seeks stockholder approval of a proposed Business Combination, then in connection
with such proposed Business Combination, it, he or she shall (i) vote any shares of Capital Stock (including shares of Common Stock underlying the Private Placement Units) owned by it, him or her in favor of any proposed Business Combination
and (ii) not redeem any shares of Common Stock owned by it, him or her in connection with such stockholder approval. 
 2. The Sponsor
and each Insider hereby agrees that in the event that the Company fails to consummate a Business Combination within 12 months from the closing of the Public Offering, or such later period approved by the Company’s stockholders in accordance
with the Company’s amended and restated certificate of incorporation (the “Charter”), the Sponsor and each Insider shall take all reasonable steps to cause the Company to (i) cease all operations except for the
purpose of winding up, (ii) as promptly as reasonably possible but not more than 10 business days thereafter, subject to lawfully available funds therefor, redeem 100% of the Common Stock sold as part of the Units in the Public Offering (the
“Offering Shares”), at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held
in the Trust Account (net of taxes), less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Offering Shares, which redemption will completely extinguish all Public Stockholders’ rights as
stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining
stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The Sponsor and
each Insider agrees to not propose any amendment to the Charter (i) to modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s initial business combination or to redeem 100% of
the Offering Shares if the Company does not complete a Business Combination within 12 months from the closing of the Public Offering or (ii) with respect to any other provision relating to stockholders’ rights or pre-business combination activity, unless the Company provides its public stockholders with the opportunity to redeem their shares of Common Stock upon approval of any such amendment at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Company to
pay its taxes, divided by the number of then outstanding Offering Shares. 

 The Sponsor and each Insider acknowledges that it, he or she has no right, title, interest
or claim of any kind in or to any monies held in the Trust Account as a result of any liquidation of the Company with respect to the Founder Shares or shares of Common Stock underlying the Private Placement Units held by it, him or her. The Sponsor
and each Insider hereby further waives, with respect to any shares of Common Stock held by it, him or her, if any, any redemption rights it, he or she may have in connection with the consummation of a Business Combination, including, without
limitation, any such rights available in the context of a stockholder vote to approve such Business Combination or a stockholder vote to approve an amendment to the Charter to modify the substance or timing of the Company’s obligation to redeem
100% of the Offering Shares if the Company has not consummated a Business Combination within the time period set forth in the Charter or in the context of a tender offer made by the Company to purchase shares of Common Stock (although the Sponsor,
the Insiders and their respective current or future affiliates shall be entitled to redemption and liquidation rights with respect to any Offering Shares it or they hold if the Company fails to consummate a Business Combination within 12 months from
the date of the closing of the Public Offering. 
 3. (a) During the period commencing on the effective date of the Underwriting Agreement
and ending 180 days after such date, other than to permitted transferees as described in paragraph 7(c) below, the Sponsor and each Insider shall not, without the prior written consent of the Representative, (i) sell, offer to sell, contract or
agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within
the meaning of Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules and regulations of the Commission promulgated thereunder, with respect to any Units, shares of Common
Stock, Founder Shares, Warrants or any securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by it, him or her, (ii) enter into any swap or other arrangement that transfers to another, in whole or in
part, any of the economic consequences of ownership of any Units, shares of Common Stock, Founder Shares, Warrants or any securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by it, him or her, whether any
such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) publicly announce any intention to effect any transaction specified in clause (i) or (ii). Each of the Insiders and the Sponsor acknowledges
and agrees that, prior to the effective date of any release or waiver, of the restrictions set forth in this paragraph 3 or paragraph 7 below, the Company shall announce the impending release or waiver by press release through a major news service
at least two business days before the effective date of the release or waiver. Any release or waiver granted shall only be effective two business days after the publication date of such press release. The provisions of this paragraph will not apply
if the release or waiver is effected solely to permit a transfer not for consideration and the transferee has agreed in writing to be bound by the same terms described in this Letter Agreement to the extent and for the duration that such terms
remain in effect at the time of the transfer. If a discretionary waiver, release or termination of any of the Founder Share restrictions (each, a “Lock-Up Waiver”) applicable to any
party subject to a lock-up agreement is granted, other than to the Company (each, a “Lock-Up Party”), then a substantively identical Lock-Up Waiver shall be deemed to apply to each of the undersigned’s Founder Shares on a pro rata basis based on the portion of the Lock-Up Parties’ Founder Shares
that were granted the Lock-Up Waiver; provided that such pro rata waiver, release or termination shall be in the same manner and on the same terms (including with respect to any conditions or provisos that
apply to such waiver or termination) from such restriction. 
 (b) The Sponsor shall not sell, transfer, assign, pledge or hypothecate any
of its Private Placement Units or securities issuable pursuant to the Forward Purchase Contract (or component securities) or shares of Common Stock issuable upon the exercise of the warrants underlying the Private Placement Units or units issuable
pursuant to the Forward Purchase Contract, or subject any of such securities to any hedging, short sale, derivative, put, or call transaction that would result in the effective economic disposition of such securities, except as provided in FINRA
Rule 5110(e)(2). 
 4. In the event of the liquidation of the Trust Account upon the failure of the Company to consummate its initial
Business Combination within the time period set forth in the Charter, the Sponsor (the “Indemnitor”) agrees to indemnify and hold harmless the Company against any and all loss, liability, claim, damage and expense whatsoever
(including, but not limited to, any and all legal or other expenses reasonably incurred in investigating, 

 
preparing or defending against any litigation, whether pending or threatened) to which the Company may become subject as a result of any claim by (i) any third party for services rendered or
products sold to the Company or (ii) any prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination agreement (a
“Target”); provided, however, that such indemnification of the Company by the Indemnitor shall (x) apply only to the extent necessary to ensure that such claims by a third party or a Target do not reduce
the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Offering Share and (ii) the actual amount per Offering Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00
per Offering Share is then held in the Trust Account due to reductions in the value of the trust assets less interest released to pay taxes, (y) shall not apply to any claims by a third party or a Target which executed a waiver of any and all
rights to the monies held in the Trust Account (whether or not such waiver is enforceable) and (z) shall not apply to any claims under the Company’s indemnity of the Underwriters against certain liabilities, including liabilities under the
Securities Act of 1933, as amended. The Indemnitor shall have the right to defend against any such claim with counsel of its choice reasonably satisfactory to the Company if, within 30 days following written receipt of notice of the claim to the
Indemnitor, the Indemnitor notifies the Company in writing that it shall undertake such defense. 
 5. To the extent that the Underwriters
do not exercise their over-allotment option to purchase up to an additional 3,000,000 Units within 45 days from the date of the Prospectus (and as further described in the Prospectus), the Sponsor agrees to forfeit, at no cost, a number of Founder
Shares in the aggregate equal to 750,000 multiplied by a fraction, (i) the numerator of which is 3,000,000 minus the number of Units purchased by the Underwriters upon the exercise of their over-allotment option, and (ii) the denominator
of which is 750,000. The forfeiture will be adjusted to the extent that the over-allotment option is not exercised in full by the Underwriters so that the Initial Stockholders will own an aggregate of 20.0% of the Company’s issued and
outstanding shares of Capital Stock after the Public Offering (not including the shares underlying the Private Placement Units). For purposes of clarification, nothing in this paragraph will impact the number of shares of Class A Common Stock
purchased by the Sponsor as part of the Forward Purchase Contract (as defined below). 
 6. The Sponsor and each Insider hereby severally
agrees and acknowledges that: (i) the Underwriters and the Company would be irreparably injured in the event of a breach by the Sponsor or an Insider of its, his or her obligations under paragraphs 1, 2, 3, 4, 5, 7(a) and 7(b), as applicable,
of this Letter Agreement, (ii) monetary damages may not be an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief from the breaching party, in
addition to any other remedy that such party may have in law or in equity against the breaching party, in the event of such breach. 
 7.
(a) The Sponsor and each Insider agrees that it, he or she shall not Transfer any Founder Shares or any of the 250,000 shares of Common Stock issuable pursuant to the Forward Contract (or shares of Common Stock issuable upon conversion thereof)
until the earlier of (A) one year after the completion of the Company’s initial Business Combination and (B) subsequent to the Business Combination, (x) if the last reported sale price of the Common Stock equals or exceeds $12.00
per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the
Company’s initial Business Combination or (y) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization or other similar transaction that results in all of the Company’s stockholders having
the right to exchange their shares of Common Stock for cash, securities or other property (the “Founder Shares Lock-up Period”). 

(b) The Sponsor and each Insider agrees that it, he or she shall not Transfer any Private Placement Units or any of the 1,000,000 units
issuable pursuant to the Forward Contract (the “Forward Purchase Units”) or component securities of the Private Placement Units and the Forward Purchase Units until 30 days after the completion of a Business Combination (the
“Private Placement Units Lock-up Period”, together with the Founder Shares Lock-up
Period, the “Lock-up Periods”). 
 (c) Notwithstanding the
provisions set forth in paragraphs 7(a) and (b), Transfers of the Founder Shares, Private Placement Units or securities issuable pursuant to the Forward Purchase Contract (or component securities or shares of Common Stock issuable upon the exercise
of the warrants underlying the Private Placement Units or the Forward Purchase Units issuable pursuant to the Forward Purchase Contract) that are held by the Sponsor, any 

 
Insider or any of their permitted transferees (that have complied with this paragraph 7(c)), are permitted (i) to the Company’s officers or directors, any current or future affiliate or
family member of any of the Company’s officers or directors or any current or future affiliate of the Sponsor or to any member(s), officers, directors or employees of the Sponsor or any of its current or future affiliates; (ii) in the case
of an individual, by gift to a member of such individual’s immediate family or to a trust, the beneficiary of which is a member of such individual’s immediate family, any current or future affiliate of such individual or to a charitable
organization; (iii) in the case of an individual, by virtue of laws of descent and distribution upon death of such individual; (iv) in the case of an individual, pursuant to a qualified domestic relations order; (v) by private sales
or transfers made in connection with any forward purchase agreement or similar arrangement or in connection with the consummation of an initial Business Combination at prices no greater than the price at which the shares or units were originally
purchased; (vi) in the event of the Company’s liquidation prior to the completion of an initial Business Combination; or (vii) by virtue of the laws of the State of Delaware or the Sponsor’s limited liability company agreement
upon dissolution of the Sponsor; provided, however, that in the case of clauses (i) through (v) or (vii), these permitted transferees must enter into a written agreement with the Company agreeing to be bound by the transfer
restrictions herein. 
 8. The Sponsor and each Insider represents and warrants that it, he or she has never been suspended or expelled from
membership in any securities or commodities exchange or association or had a securities or commodities license or registration denied, suspended or revoked. Each Insider’s biographical information furnished to the Company (including any such
information included in the Prospectus) is true and accurate in all material respects and does not omit any material information with respect to the Insider’s background. Each Insider’s questionnaire furnished to the Company is true and
accurate in all material respects. Each Insider represents and warrants that: it, he or she is not subject to or a respondent in any legal action for, any injunction,
cease-and-desist order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction; it, he or she
has never been convicted of, or pleaded guilty to, any crime (i) involving fraud, (ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities and it, he or
she is not currently a defendant in any such criminal proceeding. 
 9.The Sponsor has entered into a forward purchase contract (the
“Forward Purchase Contract”) to purchase 1,000,000 Units and 250,000 shares of Common Stock at a price per Unit of $10.00 per Unit, in a transaction exempt from the registration requirements of the Securities Act (the
“Private Placement”). The Private Placement will be completed concurrently with the completion of the initial Business Combination. 

10. Except as disclosed in the Prospectus, neither the Sponsor nor any officer, nor any current or future affiliate of the Sponsor or any
officer, nor any director of the Company, shall receive from the Company any finder’s fee, reimbursement, consulting fee, monies in respect of any repayment of a loan or other compensation prior to, or in connection with any services rendered
in order to effectuate, the consummation of the Company’s initial Business Combination (regardless of the type of transaction that it is). 

11. The Sponsor and each Insider has full right and power, without violating any agreement to which it is bound (including, without
limitation, any non-competition or non-solicitation agreement with any employer or former employer), to enter into this Letter Agreement and, as applicable, to serve as
a director on the board of directors of the Company and hereby consents to being named in the Prospectus as a director of the Company. 

12. As used herein, (i) “Business Combination” shall mean a merger, capital stock exchange, asset
acquisition, stock purchase, reorganization or similar business combination, involving the Company and one or more businesses; (ii) “Capital Stock” shall mean, collectively, the Common Stock and the Founder
Shares; (iii) “Founder Shares” shall mean (a) the 5,750,000 shares of the Company’s Class B common stock, par value $0.0001 per share, initially issued to the Sponsor (up to 750,000 Shares of
which are subject to complete or partial forfeiture by the Sponsor if the over-allotment option is not exercised by the Underwriters) for an aggregate purchase price of $25,000, or approximately $0.005 per share, prior to the consummation of the
Public Offering; (iv) “Initial Stockholders” shall mean the Sponsor and any Insider that holds Founder Shares; (v) “Private Placement Units” shall mean the
500,000 units, each unit consisting of one share of Common Stock and one-fourth of one warrant to purchase one share of Common Stock that the Sponsor has agreed to purchase for an aggregate purchase price of
$5,000,000, or $10.00 per unit, in a private placement that shall occur simultaneously with the consummation of the Public Offering; (vi) “Public Stockholders” shall mean the holders of securities issued in the
Public Offering; (vii) 

 
“Trust Account” shall mean the trust fund into which a portion of the net proceeds of the Public Offering shall be deposited; and (viii)
“Transfer” shall mean the (a) sale of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or
establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act and the rules and regulations of the Commission promulgated
thereunder with respect to, any security, (b) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be settled
by delivery of such securities, in cash or otherwise, or (c) public announcement of any intention to effect any transaction specified in clause (a) or (b). 

13. The Company will maintain an insurance policy or policies providing directors’ and officers’ liability insurance in an amount
and type that is appropriate for a blank check company such as the Company, and each Insider shall be covered by such policy or policies, in accordance with its or their terms, to the maximum extent of the coverage available for any of the
Company’s directors or officers. 
 14. This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions
contemplated hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as to any particular provision, except by a written instrument executed by the parties hereto affected by such
change, amendment or modification except any waiver need only be executed by the party waiving its rights hereunder. 
 15. No party hereto
may assign, in whole or in part, either this Letter Agreement or any of its rights, interests, or obligations hereunder without the prior written consent of the other parties. Any purported assignment in violation of this paragraph shall be void and
ineffectual and shall not operate to transfer or assign any interest or title to the purported assignee. This Letter Agreement shall be binding on the Sponsor and each Insider and their respective successors, heirs and assigns and permitted
transferees. 
 16. Nothing in this Letter Agreement shall be construed to confer upon, or give to, any person or entity other than the
parties hereto, any right, remedy or claim under or by reason of this Letter Agreement or of any covenant, condition, stipulation, promise or agreement hereof. All covenants, conditions, stipulations, promises and agreements contained in this Letter
Agreement shall be for the sole and exclusive benefit of the parties hereto and their successors, heirs, personal representatives and assigns and permitted transferees. 

17. This Letter Agreement may be executed in any number of original or facsimile or other electronic counterparts and each of such
counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. 

18. This Letter Agreement shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect
the validity or enforceability of this Letter Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this
Letter Agreement a provision as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable. 

19. This Letter Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving
effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. The parties hereto (i) all agree that any action, proceeding, claim or dispute arising out of, or relating in any way
to, this Letter Agreement shall be brought and enforced in the federal or state courts of New York City, in the State of New York, and irrevocably submit to such jurisdiction and venue, which jurisdiction and venue shall be exclusive and
(ii) waive any objection to such exclusive jurisdiction and venue or that such courts represent an inconvenient forum. 

 20. Any notice, consent or request to be given in connection with any of the terms or
provisions of this Letter Agreement shall be in writing and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery or facsimile transmission. 

21. This Letter Agreement shall terminate on the earlier of (i) the expiration of the Lock-up
Periods or (ii) the liquidation of the Company; provided, however, that this Letter Agreement shall earlier terminate in the event that the Public Offering is not consummated and closed by December 31, 2021; provided further that paragraph
4 of this Letter Agreement shall survive such liquidation. 
 [Signature Page Follows] 

 
			
	 Sincerely,

	
	 CFAC HOLDINGS VIII, LLC

		
	By:	 	 
		 	 Name: Howard W. Lutnick

		 	 Title:  Chief Executive Officer

		
	By:	 	 
		 	 Name: Howard W. Lutnick

		
	By:	 	 
		 	 Name: Anshu Jain

		
	By:	 	 
		 	 Name: Alice Chan

		
	By:	 	 
		 	 Name: Robert J. Hochberg

		
	By:	 	 
		 	 Name: Charlotte Blechman

  

			
	 Acknowledged and Agreed:

	
	 CF ACQUISITION CORP. VIII

		
	By:	 	 
		 	 Name:

		 	 Title:

 [Signature Page to Letter Agreement—CF Acquisition Corp. VIII (Insider Letter)]

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