Document:

EX-10.16

 Exhibit 10.16 

CERTAIN MATERIAL (INDICATED BY AN ASTERISK) HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT. THE OMITTED
MATERIAL HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. 
  
 

 
 EXECUTION COPY 

RESEARCH COLLABORATION, OPTION 

AND EXCLUSIVE LICENSE AGREEMENT 

by and between 
 MERCK
SHARP & DOHME CORP. 
 and 

AMBRX, INC. 

 

 
  

 RESEARCH COLLABORATION, OPTION 

AND EXCLUSIVE LICENSE AGREEMENT 

THIS RESEARCH COLLABORATION, OPTION AND EXCLUSIVE LICENSE AGREEMENT (this “Agreement”), effective as of June 13, 2012
(the “Effective Date”), by and between MERCK SHARP & DOHME CORP., a corporation organized and existing under the laws of New Jersey, (“Merck”) and AMBRX, INC., a corporation organized and existing under the
laws of the State of Delaware (“Ambrx”). 
 RECITALS: 

WHEREAS, Ambrx has developed Ambrx Know-How (as hereinafter defined) and has rights to Ambrx Patent Rights (as hereinafter defined);

 WHEREAS, Merck and Ambrx desire to enter into a research collaboration to identify and optimize polypeptide drug conjugates which
are developed against one or more of the Selected Targets (as hereinafter defined), using, among other things Ambrx’s ReCODETM Technology (as hereinafter defined) and/or EuCODETM Technology (as hereinafter defined), upon the terms and
conditions set forth herein; 
 WHEREAS, Merck desires to obtain a license under the Ambrx Patent Rights and Ambrx Know-How upon the
terms and conditions set forth herein, and Ambrx desires to grant such a license, in order to conduct the research collaboration activities; 

WHEREAS, Merck desires to have certain options, exercisable at Merck’s sole discretion, to obtain an exclusive license under the
Ambrx Patent Rights and Ambrx Know-How to further develop and commercialize the polypeptide drug conjugates, including against one or more of the Selected Targets, resulting from the research collaboration for use in the Field (as hereinafter
defined) in the Territory (as hereinafter defined), and Ambrx desires to grant Merck such options, upon the terms and conditions set forth herein; and 

WHEREAS, upon exercise by Merck of its option(s), Merck shall have the right to exercise the exclusive licenses under the Ambrx Patent
Rights and Ambrx Know-How to research, develop, make, have made, use, sell, offer for sale, export and import Compounds (as hereinafter defined) and Products (as hereinafter defined) for use in the Field in the Territory, and Ambrx desires to grant
such licenses, upon the terms and conditions set forth herein. 
 NOW, THEREFORE, in consideration of the foregoing premises and the
mutual covenants contained herein, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows: 

ARTICLE 1 
 DEFINITIONS

 Unless specifically set forth to the contrary herein, the following terms shall have the respective meanings set forth below: 

	 	1.1	“Act” shall mean, as applicable, the United States Federal Food, Drug and Cosmetic Act, 21 U.S.C. §§ 301 et seq., and/or the Public Health Service Act, 42 U.S.C. §§ 262 et
seq., as such may be amended from time to time. 

  

	 	1.2	“Affiliate” shall mean, with respect to any Person, any other Person that directly or indirectly controls, is controlled by or is under common control with such Person. A Person shall be deemed
to control another Person if such Person possesses the power to direct or cause the direction of the management, business and policies of such Person, whether through the ownership of fifty percent (50%) or more of the voting securities of such
Person, by contract or otherwise. 

  

	 	1.3	“Agreement” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.4	“Ambrx” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.5	“Ambrx Background Know-How” shall mean all information and materials, including discoveries, improvements, processes, methods, protocols, formulas, compositions of matter, data, inventions,
know-how (including any Linker Technology) and/or trade secrets, patentable or otherwise, which (i) are Controlled by Ambrx or any of its Affiliates as of the Effective Date or during the Research Program Term, (ii) are not generally known
and (iii) are necessary or reasonably useful either (a) in connection with the performance of activities under the Research Program and/or (b) in connection with the research, development, manufacture, marketing, use or sale of
Compound(s) or Product(s) in the Territory. [***] For clarity, the use of “Affiliate” in this definition shall exclude any Third Party that becomes an Affiliate of Ambrx after the
Effective Date due to a Change of Control involving Ambrx and such Third Party; provided that (i) such Affiliate does not engage in Research Program activities under this Agreement and (ii) for clarity, in all cases, all information and
materials included within the “Ambrx Background Know-How” prior to the time that such Change of Control occurs shall continue to be included in “Ambrx Background Know-How” following such Change of Control. 

 

	 	1.6	“Ambrx Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed, invented, reduced to
practice and/or otherwise made under the Research Program solely by employees of Ambrx (or any of its Affiliates) or other persons (not employed by Merck (or any of its Affiliates)) acting on behalf of Ambrx (or any of its Affiliates).

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 2
- 

	 	1.7	“Ambrx Know How” shall mean, the Ambrx Background Know-How, the Ambrx Collaboration Information and Inventions and Ambrx’s rights in Joint Collaboration Information and Inventions.

  

	 	1.8	“Ambrx Patent Rights” shall mean any and all Patent Rights in the Territory which are Controlled by Ambrx or any of its Affiliates as of the Effective Date or during the Term and which
(i) claim or cover any Compound and/or Product or the research, development, manufacture, marketing, use or sale thereof;(ii) claim or cover Ambrx Know-How (including any Ambrx Collaboration Information and Inventions or Ambrx’s
rights in Joint Collaboration Information and Inventions); or (iii) claim or cover ReCODETM Modification or EuCODETM Modification. [***] 

  

	 	1.9	“Ambrx Third Party License Agreements” shall mean the Scripps License. 

  

	 	1.10	“Applicable Laws” shall mean the applicable laws of any jurisdiction which are applicable to any of the Parties or their respective Affiliates in carrying out activities hereunder or to which any
of the Parties or their respective Affiliates in carrying out the activities hereunder is subject, and shall include all statutes, enactments, acts of legislature, laws, ordinances, rules, regulations, notifications, guidelines, policies,
directions, directives and orders of any statutory authority, tribunal, board, or court or any central or state government or local authority or other governmental entity in such jurisdictions, including the Act. 

 

	 	1.11	“Calendar Quarter” shall mean the respective periods of three (3) consecutive calendar months ending on March 31, June 30, September 30 and December 31.

  

	 	1.12	“Calendar Year” shall mean each successive period of twelve (12) months commencing on January 1 and ending on December 31. 

 

	 	1.13	“Cancer” shall mean [***]. 

  

	 	1.14	“Change of Control” shall mean [***] 

  

	 	1.15	“Clinical Trial” shall mean a Phase I Clinical Trial, Phase II Clinical Trial, or Phase III Clinical Trial, as applicable. 

 

	 	1.16	“Collaboration Information and Inventions” shall mean any protocol, formula, data, know-how, information, trade secret, process, method, composition of matter [***], compound [***], material,
article of manufacture, discovery, invention or finding, patentable or otherwise, that is first conceived, discovered, developed, invented, reduced to practice and/or otherwise made (as would be necessary to establish inventorship under United
States patent law (regardless of where the applicable activities occurred)) in performance of the Research Program. For clarity, “Collaboration Information and Inventions” shall exclude Patent Rights. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 3
- 

	 	1.17	“Combination Product” shall mean a Product which includes one or more active ingredients other than a Compound in combination with a Compound. All references to Product in this Agreement shall be
deemed to include Combination Product. 

  

	 	1.18	“Commercially Reasonable Efforts” shall mean[***]. 

  

	 	1.19	“Committee” shall mean the joint research committee established to facilitate the Research Program, as more fully described in Section 2.4.1. 

 

	 	1.20	“Compound” shall mean any and all (a) polypeptide drug conjugates Discovered in performance of a Research Program with Primary Activity directed against the applicable Selected Target and
(b) any subsequent modifications or derivatives of such polypeptide drug conjugate under subsection (a) that still maintain Primary Activity directed against the applicable Selected Target, whether modified or derived during or after the
Research Program. [***]. 

  

	 	1.21	“Confidential Information” shall mean any and all proprietary and/or confidential information and data, including all scientific, pre-clinical, clinical, regulatory, manufacturing, marketing,
financial and commercial information or data, whether communicated in writing or orally or by any other method, which is provided by one Party to the other Party in connection with this Agreement. 

 

	 	1.22	“Control”, “Controls” or “Controlled by” shall mean with respect to any Patent Rights, know-how or other intellectual property assets or other items or rights,
as applicable, the possession of (whether by ownership or license or other right, other than pursuant to a license under this Agreement), or the ability of a Party to grant access to, or a license or sublicense of, such item or right as provided for
herein without violating the terms of any agreement or other arrangement with any Third Party existing at the time such Party would be required hereunder to grant the other Party such access or license or sublicense. 

 

	 	1.23	“Discover” shall mean, [***] 

  

	 	1.24	“EuCODETM Modification” shall mean the design, creation, modification and/or generation of compounds against a Target through the incorporation, substitution or addition of one or more
non-naturally encoded amino acids (i.e., amino acids other than the 20 naturally-encoded amino acids), including non-naturally encoded amino acids providing one or more points of site-specific attachment for a drug, into the amino acid sequence of
the polypeptide comprising such compounds against a Target using EuCODETM Technology. 

  

	 	1.25	“EuCODETM Technology” shall mean Ambrx Patent Rights and Ambrx Know-How (i) necessary for performing EuCODETM Modification and/or (ii) directed to or 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 4
- 

	 	
necessary for expressing, or chemically modifying, Compounds resulting from EuCODETM Modification. 

  

	 	1.26	“Field” shall mean the use of Compound and Product [***]. 

  

	 	1.27	“Filing” of an NDA (or IND, as applicable) shall mean the acceptance by a Regulatory Authority of an NDA (or IND, as applicable) for filing; provided that such Regulatory Authority has not issued
a refusal to file letter or a letter identifying deficiencies for which the Regulatory Authority will suspend its review following submission of the filing. 

  

	 	1.28	“First Commercial Sale” shall mean, with respect to a given Product in a given country in the Territory[***]. 

 

	 	1.29	“Full Time Equivalent” or “FTE” shall mean the equivalent of a full-time scientist’s work time over a Calendar Year consisting of a total of one thousand seven hundred and
sixty (1760) hours per Calendar Year of work devoted to, and directly related to, conducting activities under the Research Program in accordance with this Agreement. Any individual who devotes less than one thousand seven hundred and sixty
(1760) hours per Calendar Year to conducting activities under the Research Program shall be treated as an FTE on a pro-rata basis taking into account the actual number of hours worked on conducting activities under the Research Program divided
by one thousand seven hundred and sixty (1760) hours. No individual may be charged at greater than one (1) FTE in a given Calendar Year. 

  

	 	1.30	“FTE Rate” shall mean [***]. 

  

	 	1.31	“GLP” or “Good Laboratory Practice” shall mean the applicable then-current standards for laboratory activities for pharmaceuticals or biologicals, as set forth in the Act, as
amended from time to time, together with any similar standards of good laboratory practice as are required by any Regulatory Authority in the Territory. 

  

	 	1.32	“Improvement to Ambrx Background Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Ambrx Background
Know-How (including any Improvement to Ambrx Linker Technology Solely Developed by Ambrx). Notwithstanding the foregoing, “Improvement to Ambrx Background Technology” shall exclude any Collaboration Information and Invention that is
(i) an Improvement to Ambrx Linker Technology (other than an Improvement to Ambrx Linker Technology Solely Developed by Ambrx), [***] and/or (iii) a Selected Target, Compound or Product (or specifically related to, or applicable to, a
Selected Target, Compound or Product). 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 5
- 

	 	1.33	“Improvement to Ambrx Linker Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Linker Technology within
the Ambrx Background Know-How. 

  

	 	1.34	“Improvement to Ambrx Linker Technology Solely Developed by Ambrx” shall mean any Improvement to Ambrx Linker Technology that is conceived, discovered, developed, invented, reduced to practice
and/or otherwise made under the Research Program solely by employees of Ambrx (or any of its Affiliates) or other persons (not employed by Merck (or any of its Affiliates)) acting on behalf of Ambrx (or any of its Affiliates). 

 

	 	1.35	“Improvement to Merck Background Technology” shall mean any [***] 

  

	 	1.36	“Improvement to Merck Linker Technology” shall mean any [***] 

  

	 	1.37	“IND” shall mean an Investigational New Drug application, Clinical Study Application, Clinical Trial Exemption, or similar application or submission for approval to conduct human clinical
investigations filed with or submitted to the applicable Regulatory Authority in conformance with the requirements of such Regulatory Authority. 

  

	 	1.38	“IND-Enabling Pharmacology and Toxicology Study” shall mean a genotoxicity, acute toxicology, safety pharmacology and sub-chronic toxicology study, in species that satisfy applicable regulatory
requirements, using applicable GLP, that meets the standard necessary for submission as part of an IND filing with the applicable Regulatory Authority[***]. 

  

	 	1.39	“Initiates” or “Initiation” shall mean, with respect to a Clinical Trial, the administration of the first dose to a patient in such Clinical Trial. 

 

	 	1.40	“Joint Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed, invented, reduced to
practice and/or otherwise made under the Research Program jointly by employee(s) of Merck and/or its Affiliate and/or a Third Party acting on behalf of Merck or its Affiliate, on the one hand, and employee(s) of Ambrx and/or its Affiliate and/or a
Third Party acting on behalf of Ambrx or its Affiliate, on the other hand. 

  

	 	1.41	“Joint Patent Rights” shall mean all Patent Rights to the extent claiming patentable Joint Collaboration Information and Inventions. 

 

	 	1.42	“Linker Technology” shall mean [***]. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 6
- 

	 	1.43	“Major Markets” shall mean the following countries: the United States, Japan, the United Kingdom, France, Germany, Italy and Spain. 

 

	 	1.44	“Major Market in the EU” shall mean any one of the following countries: the United Kingdom, France, Germany, Italy or Spain. 

 

	 	1.45	“Marketing Authorization” shall mean all approvals from the relevant Regulatory Authority necessary to market and sell a Product in a given country in the Territory (including all applicable
pricing and governmental reimbursement approvals legally required to sell Product in such country). 

  

	 	1.46	“Merck” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.47	“Merck Background Know-How” shall mean [***]. 

  

	 	1.48	“Merck Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed, invented, reduced to
practice and/or otherwise made under the Research Program solely by employees of Merck (or any of its Affiliates) or other persons (not employed by Ambrx (or any of its Affiliates)) acting on behalf of Merck (or any of its Affiliates).

  

	 	1.49	“Merck Know-How” shall mean the Merck Background Know-How, the Merck Collaboration Information and Inventions and Merck’s rights in Joint Collaboration Information and Inventions.

  

	 	1.50	“Merck Patent Rights” shall mean any and all Patent Rights in the Territory which are Controlled by Merck or any of its Affiliates and which claim or cover Merck Know-How (including Merck
Collaboration Information and Inventions and Merck’s rights in Joint Collaboration Information and Inventions). 

  

	 	1.51	“Merck Proprietary Molecule” shall mean [***]. 

  

	 	1.52	“Merck Reversion Technology” shall mean [***]. 

  

	 	1.53	“NDA” shall mean a New Drug Application, Biologics License Application, Worldwide Marketing Application, Marketing Authorization Application, filing pursuant to Section 510(k) of the Act, or
similar application or submission for Marketing Authorization of a Product filed with a Regulatory Authority to obtain marketing approval for a biological, pharmaceutical or diagnostic product in a given country or group of countries.

  

	 	1.54	“Net Sales” shall mean the [***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 7
- 

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***] 

  

	 	(d)	[***] 

  

	 	(e)	[***] 

  

	 	(f)	[***] 

  

	 	(g)	[***] 

 [***] 

[***] 
  

	 	1.55	“Option(s)” shall have the meaning set forth in Section 3.6.1(c) of this Agreement. 

  

	 	1.56	“Option Exercise Date” shall mean the date that Merck exercises a given Option (if any) as set forth in Section 3.6.1. 

 

	 	1.57	“Party” shall mean Merck or Ambrx, individually, and “Parties” shall mean Merck and Ambrx, collectively. 

 

	 	1.58	“Patent Rights” shall mean (i) patents and patent applications in the Territory (which for the purposes of this Agreement shall be deemed to include certificates of invention and
applications for certificates of invention) and (ii) any and all divisionals, continuations, continuations-in-part, reissues, renewals, substitutions, registrations, re-examinations, revalidations, extensions, supplementary protection
certificates and the like of any such patents and patent applications, and any and all foreign equivalents of the foregoing in the Territory. 

  

	 	1.59	“Person” means any individual, partnership, joint venture, limited liability company, corporation, firm, trust, association, unincorporated organization, governmental authority or agency, or any
other entity not specifically listed herein. 

  

	 	1.60	“Phase I Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(a), as may be amended, or the foreign equivalent thereof.

  

	 	1.61	“Phase II Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(b), as may be amended, or the foreign equivalent thereof.

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 8
- 

	 	1.62	“Phase III Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(c), as may be amended, or the foreign equivalent thereof.

  

	 	1.63	“Preclinical Proof of Concept” shall mean that a given Compound has successfully met the criteria, as reasonably determined by Merck, set forth in the applicable Research Plan as the proof of
concept criteria. 

  

	 	1.64	“Primary Activity” shall mean [***]. 

  

	 	1.65	“Product” shall mean any pharmaceutical or biological preparation in final form containing a Compound for any and all uses in the Field, including any Combination Product. For clarity, different
formulations or dosage strengths of a given Product shall be considered the same Product for purposes of this Agreement. 

  

	 	1.66	“Program Linker Technology” shall mean any Linker Technology that is a Collaboration Information and Invention. 

 

	 	1.67	“ReCODETM Modification” shall mean the design, creation, modification and/or generation of compounds against a Target through the incorporation, substitution or addition of one or more
non-naturally encoded amino acids (i.e., amino acids other than the 20 naturally-encoded amino acids), including non-naturally encoded amino acids providing one or more points of site-specific attachment for a drug, into the amino acid sequence of
the polypeptide comprising such compounds against a Target using ReCODETM Technology. 

  

	 	1.68	“ReCODETM Technology” shall mean Ambrx Patent Rights and Ambrx Know-How (i) necessary for performing ReCODETM Modification and/or (ii) directed to or necessary for expressing,
or chemically modifying, Compounds resulting from ReCODETM Modification. 

  

	 	1.69	“Regulatory Authority” shall mean any applicable government regulatory authority involved in granting approvals for the manufacturing, marketing, reimbursement and/or pricing of a Product in the
Territory, including, in the United States, the United States Food and Drug Administration and any successor governmental authority having substantially the same function. 

 

	 	1.70	“Related Party” shall mean each of Merck, its Affiliates, and their respective sublicensees (which term does not include distributors), as applicable. 

 

	 	1.71	[***] 

  

	 	1.72	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 9
- 

	 	1.73	[***] 

  

	 	1.74	[***] 

  

	 	1.75	[***] 

  

	 	1.76	[***] 

  

	 	1.77	[***] 

  

	 	1.78	[***] 

  

	 	1.79	[***] 

  

	 	1.80	[***] 

  

	 	1.81	[***] 

  

	 	1.82	[***] 

  

	 	1.83	“Reversion Combination Product” shall mean a Reversion Product which includes one or more active ingredients other than a Reversion Compound in combination with a Reversion Compound.

  

	 	1.84	“Reversion Compound” shall mean [***] 

  

	 	1.85	“Reversion Product” shall mean any pharmaceutical or biological preparation in final form containing a Reversion Compound for any and all uses in the Field, including any Reversion Combination
Product. For clarity, once a given Product becomes a Reversion Product, it shall no longer be considered a “Product” for purposes of this Agreement. 

  

	 	1.86	“Royalty Products” shall mean [***], as applicable. 

  

	 	1.87	“Scripps License” shall mean that certain License Agreement by and between The Scripps Research Institute (“Scripps”) and Ambrx, dated as of August 26, 2003, as amended by
Amendment No. 1, dated December 19, 2005, and as the same may be amended from time to time in accordance with this Agreement. 

  

	 	1.88	“Selected Target” shall mean [***] 

  

	 	1.89	“Target” shall mean [***] 

  

	 	1.90	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
10 - 

	 	1.91	[***] 

  

	 	1.92	[***] 

  

	 	1.93	[***] 

  

	 	1.94	[***] 

  

	 	1.95	[***] 

  

	 	1.96	“Territory” shall mean all of the countries in the world, and their territories and possessions. 

  

	 	1.97	“Third Party” shall mean an entity other than Merck and its Affiliates, and Ambrx and its Affiliates. 

  

	 	1.98	[***]. 

  

	 	1.99	[***]. 

  

	 	1.100	“Valid Patent Claim” shall mean [***]. 

  

	 	1.101	“Violation” shall mean that a Party or any of its officers or directors or any other personnel (or other permitted agents of such Party performing activities hereunder) has been:
(1) convicted of any of the felonies identified among the exclusion authorities listed on the U.S. Department of Health and Human Services, Office of Inspector General (OIG) website, including 42 U.S.C. 1320a-7(a)
(http://oig.hhs.gov/exclusions/authorities.asp); (2) identified in the OIG List of Excluded Individuals/Entities (LEIE) database (http://exclusions.oig.hhs.gov/) or the U.S. General Services Administration’s list of Parties Excluded from
Federal Programs (http://www.epls.gov); or (3) listed by any US Federal agency as being suspended, debarred, excluded or otherwise ineligible to participate in Federal procurement or non-procurement programs, including under 21 U.S.C. 335a
(http://www.fda.gov/ora/compliance_ref/debar/) (each of (1), (2) and (3) collectively the “Exclusions Lists”). 

  

	 	1.102	Additional Definitions. The following terms have the meanings set forth in the corresponding Sections of this Agreement: 

  

			
	 Term
	  	 Section

		
	“AAA”	  	10.6.1
	“Additional Third Party Licenses”	  	5.5.7
	“Ambrx Compound Patent Rights”	  	7.2.1

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
11 - 

			
	“Ambrx Indemnified Parties”	  	9.1
	“Code”	  	8.4(g)
	“Development/Commercialization Milestones”	  	5.4.2
	[***]	  	5.4.2
	[***]	  	5.4.2
	[***]	  	5.4.2
	[***]	  	5.4.2
	[***]	  	5.4.2
	“Eliminated FTE”	  	5.2.3
	“Excluded Claim”	  	10.6.6
	“Excluded Targets”	  	2.1.1
	“Exclusions Lists”	  	1.101
	“Human Materials”	  	2.2.2
	“Indemnified Party”	  	9.3
	“Indemnifying Party”	  	9.3
	“License Payments”	  	5.9
	“Materials”	  	2.9
	“Merck Indemnified Parties”	  	9.2
	“Officials”	  	2.12.2
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	“Option Outside Date”	  	3.6.1(c)
	“Payment”	  	2.12.2
	“Project Leader”	  	2.4.3
	“Providers”	  	2.2.2
	“Research Milestones”	  	5.4.1
	[***]	  	[***]
	[***]	  	[***]
	[***]	  	[***]
	“Royalty Period”	  	5.5.4
	“Safety/Efficacy Termination”	  	8.2
	“Sensitive Information”	  	10.2
	“Taxes”	  	5.9
	“Target Identification Date”	  	2.1.1
	“Target Identification Notice”	  	2.1.1
	“Term”	  	8.1

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
12 - 

			
	“Third Party Research Costs”	  	5.2.1
	“[***] Sublicense”	  	3.2

 ARTICLE 2 

RESEARCH PROGRAM 
  

	 	2.1	General; Research Plans and Selected Targets 

  

	 	2.1.1	Identification of Selected Targets. The Parties hereby agree and acknowledge that Target 1 has been identified by the Parties and is more particularly described on Schedule 1.90. Within [***] after
the Effective Date, Merck shall identify a [***]), which Targets may be chosen by Merck in its sole discretion; provided, however, that such Targets are not otherwise identified on Schedule 2.1.1 (the “Excluded Targets”);
[***] Merck shall notify Ambrx thereof in writing (each such notice, a “Target Identification Notice”, and the date of delivery of such notice with respect to a given Target, the “Target Identification Date”, as
applicable). 

  

	 	2.1.2	Creation of Initial Research Plans. The Parties hereby acknowledge and agree that the initial Research Plan 1 for the activities under Research Program 1 is attached hereto as Schedule 1.72. [***].

  

	 	2.1.3	Research Program in General. Ambrx and Merck shall engage in the [***] upon the terms and conditions set forth in this Agreement and as directed by the Committee. The activities to be undertaken in the
course of the Research Program shall be set forth in [***], any or all of which Research Plans may be amended from time to time by the Committee as set forth herein. Each Research Plan shall provide that, subject to Section 2.4.1, Ambrx shall
solely be responsible for (a) making the research quantities of recombinant polypeptides incorporating non-active amino acids under the applicable Research Program for use in such Research Program and (b) EuCODETM Modification
activities and ReCODETM Modification activities involving the use or application of EuCODETM Technology or ReCODETM Technology under the Research Plan (subject to Section 2.5.2) for the applicable Research Program, in each case,
through the earlier of (i) the applicable Option Outside Date for such Research Program or (ii) the exercise of the applicable Option by Merck for such Research Program. 

 

	 	2.2	Conduct of Research 

  

	 	2.2.1	 Activities and Efforts. Ambrx and Merck each shall use Commercially Reasonable Efforts to accomplish the objectives of the Research
Program, 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
13 - 

	 	
including to perform all activities to be performed by such Party as set forth in the applicable Research Plan, and in connection therewith, each Party shall maintain and utilize sufficient
equipment, laboratories, offices and other facilities, and use personnel with sufficient skills and experience, in each case, as are required to accomplish the Research Program in accordance with the terms of this Agreement and the Research Plans,
as applicable. 

  

	 	2.2.2	Compliance. Ambrx and Merck each shall conduct the Research Program in compliance with all Applicable Laws. In addition, if animals are used in research under a Research Program hereunder, the Parties will
comply with the Animal Welfare Act or any other applicable local, state, national and international laws and regulations relating to the care and use of laboratory animals, and are encouraged to use the highest standards, such as those set forth in
the Guide for the Care and Use of Laboratory Animals (NRC, 1996), for the humane handling, care and treatment of such research animals. Any animals which are used in the course of a Research Program, or products derived from those animals, such as
eggs or milk, will not be used for food purposes, nor will these animals be used for commercial breeding purposes. In addition, if any human cell lines, tissue, human clinical isolates or similar human-derived materials (“Human
Materials”) have been or are to be collected and/or used in a Research Program, each Party represents and warrants (i) that it has complied, or shall comply, with all Applicable Laws relating to the collection and/or use of the Human
Materials and (ii) that it has obtained, or shall obtain, all necessary approvals and appropriate informed consents, in writing, for the collection and/or use of such Human Materials, and such Party shall provide documentation of such approvals
and consents to the other upon request. Each Party further represents and warrants that such Human Materials may be used as contemplated in this Agreement without any obligations to the individuals or entities (“Providers”) who
contributed the Human Materials, including any obligations of compensation to such Providers or any other Third Party for the intellectual property associated with, or commercial use of, the Human Materials for any purpose. Each Party shall notify
the other Party in writing of any deviations from applicable regulatory or legal requirements. Each Party hereby certifies that it has not employed or otherwise used in any capacity, and will not employ or otherwise use in any capacity, the services
of any person debarred under United States law, including but not limited to Section 21 USC 335a, or foreign equivalent thereof, in performing any portion of the Research Program. Each Party shall notify the other Party in writing immediately
if any such debarment occurs or comes to its attention, and shall, with respect to any person or entity so debarred promptly remove such person or entity from performing any Research Program activities, function or capacity related to the Research
Program. 

  

	 	2.2.3	 Subcontractors. Merck shall be entitled to utilize the services of its Affiliates and Third Parties to perform its Research Program
activities. Ambrx shall be entitled to utilize the services of its Affiliates to perform its Research Program activities; Ambrx shall be entitled to utilize the services of Third Parties to perform its

  
 - 14 - 

	 	
Research Program activities only upon Merck’s prior written consent, not to be unreasonably withheld, or as specifically set forth in the applicable Research Plan. Notwithstanding any such
consent, each Party shall remain at all times fully liable for its respective responsibilities under the Research Program. In all cases, the rights granted to any subcontractor shall be subject and subordinate to the applicable terms and conditions
of this Agreement. The applicable Party engaging a subcontractor shall oversee the performance by its subcontractors of the subcontracted activities in a manner that would be reasonably expected to result in their timely and successful completion of
such activities, and such Party shall remain responsible and primarily and fully liable for the performance of such activities in accordance with this Agreement. Each Party hereby expressly waives any requirement that the other Party exhaust any
right, power or remedy, or proceed against such subcontractor for any obligation or performance hereunder, prior to proceeding directly against the Party engaging such subcontractor. The Party engaging a subcontractor shall ensure compliance with
the applicable terms of this Agreement by any such subcontractor with respect to the applicable activities to be performed by such subcontractor hereunder, including with respect to provisions on confidentiality and intellectual property ownership
and compliance with legal requirements. Without limiting the foregoing, to the extent that a Party utilizes Third Party contractors to perform Research Program activities, such Party shall ensure that such Third Party contractors are obligated to
assign rights to any Collaboration Information and Inventions made by such Third Party contractors so that such rights can be conveyed in accordance with the terms and conditions of this Agreement, including Section 2.7. 

 

	 	2.3	Use of Research Funding 

 Ambrx shall apply the research funding it receives from
Merck under this Agreement to carry out its Research Program activities in accordance with the applicable Research Plan and the terms and conditions of this Agreement. 
  

	 	2.4	Joint Research Committee 

 The Parties hereby establish a committee to facilitate
the Research Program as follows: 
  

	 	2.4.1	 Composition of the Joint Research Committee. The Research Program shall be conducted under the direction of a joint research committee
(the “Committee”) comprised of three (3) representatives of Merck and three (3) representatives of Ambrx. Each Party shall provide the other with a list of its initial members of the Committee no later than thirty
(30) days after the Effective Date, and each Party may change its representatives to the Committee from time to time, in its sole discretion, effective upon notice to the other Party of such change. These representatives shall have appropriate
technical credentials, experience and knowledge, and ongoing familiarity with the Research Program. Additional representatives or consultants may from time to time, by mutual consent of the

  
 - 15 - 

	 	
Parties, be invited to attend Committee meetings, subject to such representative’s or consultant’s written agreement to comply with the requirements of Section 4.1. The Committee
shall be chaired by a representative of Merck, who shall prepare written draft minutes of all Committee meetings within twenty (20) days following such meetings, and shall circulate such minutes to the Committee members. Merck shall issue final
minutes within twenty (20) days following receipt of Ambrx’s written comments. Decisions of the Committee shall be made unanimously by the representatives, with each Party having a single vote. In the event that the Committee cannot or
does not, after good faith efforts, reach agreement on an issue, the issue will be communicated [***] who shall endeavor to facilitate a resolution of such issue. If the Parties have not resolved such issue within ten (10) business days
following the communication of the issue to them, then the resolution and/or course of conduct shall be determined by Merck, in its sole discretion (and such matter shall not be subject to dispute resolution pursuant to Section 10.6); [***] or
(iii) resolve any dispute regarding payments hereunder. In making such final decision, the [***] shall consider any comments from Ambrx and such decision shall be consistent with the general goals of the applicable Research Program. Each Party
shall bear its own expenses related to the attendance of such meetings by its representatives. 

  

	 	2.4.2	 Meetings and Responsibilities. The Committee shall meet in accordance with a schedule established by mutual written agreement of the
Parties, but no less frequently than once per Calendar Quarter, with the location for such meetings alternating between Ambrx and Merck facilities (or such other location as may be determined by the Committee). Alternatively, the Committee may meet
by means of teleconference, videoconference or other similar communications equipment. The Committee shall be responsible for directing the Research Program and making decisions and determinations in connection therewith, including (i) to
create and approve [***], (ii) to amend any of the Research Plans (including with respect to any extension periods as set forth in Section 5.3), (iii) to review and coordinate the Parties’ activities under the Research Program,
(iv) to confer regarding the status of the Research Program and the progress under the Research Program, (v) to review relevant data under the Research Program, (vi) to consider and advise on any technical issues that arise under the
Research Program, (vii) to consider issues of priority of activities under the Research Program, (viii) to discuss intellectual property strategy and other intellectual property matters under the Research Program, and to discuss matters
related to Merck Background Know-How, Merck Patent Rights, Ambrx Background Know-How and Ambrx Patent Rights, which a Party proposed to make available or has made available for use in connection with performance of activities under the Research
Program, and to discuss other relevant Third Party intellectual property rights, and (ix) to review and advise on any budgetary and economic matters relating to the Research Program (including to allocate resources across the projects and to

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
16 - 

	 	
determine the number of FTEs needed to conduct the Research Program activities). 

  

	 	2.4.3	Project Leaders. Merck and Ambrx each shall appoint a person (a “Project Leader”) from the Committee to coordinate its part of the Research Program. The Project Leaders shall be the
primary contact between the Parties with respect to the Research Program. Each Party shall notify the other within thirty (30) days of the Effective Date of the appointment of its Project Leader and shall notify the other Party as soon as
practicable upon changing this appointment. 

  

	 	2.4.4	Limitations on Authority of the Committee. The Committee will have solely the roles and responsibilities assigned to it in this Article 2. The Committee will have no authority to amend, modify or waive
compliance with this Agreement (provided that for clarity, the Committee shall have the right to amend or modify the Research Plans as set forth in this Section 2.4). In addition, the Committee will have no authority to amend, modify or limit
Merck’s final decision-making authority with respect to the development and commercialization of Compound and Product as set forth in this Agreement. 

  

	 	2.4.5	Disbandment of Committee. Upon completion (or earlier termination) of a given Research Program, the Committee shall have no further authority with respect to the Compounds (or Reversion Compounds, as
applicable) Discovered under such Research Program, and all further research and development thereof hereunder shall be in accordance with Section 3.8. Upon completion (or earlier termination) of all Research Programs, the Committee shall be
disbanded and shall have no further authority with respect to the activities hereunder, and all further research and development of Compounds (or Reversion Compounds, as applicable) hereunder shall be in accordance with Section 3.8.

  

	 	2.5	Exchange of Information 

  

	 	2.5.1	Ambrx Background Know-How. Within a reasonable time period following execution of this Agreement (but in all cases within thirty (30) days after the Effective Date), and promptly on an ongoing basis
during the Research Program Term, Ambrx shall disclose to Merck in English (and deliver in writing or in an electronic format) Ambrx Background Know-How related to the effects of the non-native amino acid format on process, protein folding,
stability, pharmacokinetics and safety not previously disclosed in writing to Merck. 

  

	 	2.5.2	 Technology Transfer of EuCODETM Technology or ReCODETM Technology during Research Program Term. For clarity, Ambrx shall be
solely responsible for all EuCODETM Modification activities and ReCODETM Modification activities involving the use or application of EuCODETM Technology or ReCODETM Technology under the applicable Research Plan during the applicable
Research Program Term. Notwithstanding the foregoing (and without limiting any other rights or remedies of Merck hereunder), if Ambrx is unable to perform such activity(ies) to a material degree and such inability continues for sixty (60) days

  
 - 17 - 

	 	
following receipt of written notice from Merck, Ambrx shall transfer to Merck the EuCODETM Technology and ReCODETM Technology (and any other relevant Ambrx Background Technology)
reasonably necessary for Merck to perform such activity(ies) and Ambrx shall reasonably assist Merck in performing such activity(ies). 

  

	 	2.6	Records and Reports 

  

	 	2.6.1	Records. Ambrx shall maintain complete and accurate records, in sufficient detail and in good scientific manner appropriate for patent and regulatory purposes, which shall fully and properly reflect all
work done and results achieved in the performance of the Research Program by Ambrx, as well as the number of FTEs utilized by Ambrx for the performance of the Research Program. Merck shall maintain complete and accurate records, in sufficient detail
and in good scientific manner appropriate for patent and regulatory purposes, which shall fully and properly reflect all work done and results achieved in the performance of the Research Program by Merck. Upon request during the Term, the other
Party shall provide copies of the records described in Section 2.6.1 above (provided, however, that Ambrx shall only have the right to receive copies of such records with respect to Reversion Compounds or other Collaboration Information and
Inventions over which Ambrx has prosecution control as set forth in Article 7). 

  

	 	2.6.2	Copies and Inspection of Records. During the Term, Merck shall have the right, during normal business hours and upon reasonable notice, to inspect and copy all such records of Ambrx referred to in
Section 2.6.1 in order to verify the number of FTEs utilized by Ambrx in the performance of the Research Program. Merck shall have the right to arrange for its employees and/or consultants involved in the activities contemplated hereunder to
visit the offices and laboratories of Ambrx (and any of its Affiliates) and any of its Third Party contractors as permitted under Section 2.2 during normal business hours and upon reasonable notice, and to discuss the Research Program work and
its results in detail with the technical personnel and consultants of Ambrx. 

  

	 	2.6.3	Quarterly Reports. Within thirty (30) days following the end of each Calendar Quarter during the Research Program Term, each Party shall provide to other Party a written progress report in English
which shall describe the work performed during such Calendar Quarter on the Research Program, evaluate the work performed in relation to the goals of the Research Program for such Calendar Quarter and provide such other information as may be
required by the Research Program or reasonably requested by such other Party relating to the progress of the goals or performance of the Research Program. 

  

	 	2.6.4	 Data Integrity. Each Party acknowledges the importance of ensuring that the Research Program is undertaken in accordance with the
following good data management practices: (i) data is being generated using sound scientific techniques and processes; (ii) data is being accurately and reasonably 

  
 - 18 - 

	 	
contemporaneously recorded in accordance with good scientific practices by Persons conducting research hereunder; (iii) data is being analyzed appropriately without bias in accordance with
good scientific practices; and (iv) all data and results are being stored securely and can be easily retrieved. Each Party agrees that it shall carry out the Research Program so as to collect and record any data generated therefrom in a manner
consistent with the foregoing requirements. 

  

	 	2.7	Research Collaboration Information and Inventions 

  

	 	2.7.1	Ownership. Inventorship of Collaboration Information and Inventions shall be determined in accordance with United States patent laws (regardless of where the applicable activities occurred).
Notwithstanding the foregoing, all right, title and interest in and to any and all Collaboration Information and Inventions shall be determined in accordance with the following terms and conditions, such that the entire right, title and interest in:

  

	 	(a)	[***]; 

  

	 	(b)	[***]; and 

  

	 	(c)	[***]. 

  

	 	2.7.2	Disclosure. Ambrx shall promptly disclose to Merck in writing the development, making, conception or reduction to practice of Ambrx Collaboration Information and Inventions (including any Compounds within
such Ambrx Collaboration Information and Inventions) and/or Merck Collaboration Information and Inventions. Merck shall promptly disclose to Ambrx in writing the development, making, conception or reduction to practice of Ambrx Collaboration
Information and Inventions. Each Party shall promptly disclose to the other all Joint Collaboration Information and Inventions (including any Compounds within such Joint Collaboration Information and Inventions). 

 

	 	2.7.3	 Assignment of Interests to Effectuate Ownership. With respect to any Collaboration Information and Invention, each of Ambrx and Merck
shall, and hereby do, on behalf of themselves and each of their respective Affiliates, employees and contractors hereunder, assign to one another ownership of rights, title and interest in and to such Collaboration Information and Inventions to
effect the ownership of such Collaboration Information and Inventions as set forth in Section 2.7.1, subject to any licenses expressly granted under this Agreement. In furtherance of the foregoing, each Party shall, upon request by the other,
promptly undertake and perform (and/or cause its Affiliates and its and their respect employees and/or agents to promptly undertake and perform) such further actions as are reasonably necessary for Ambrx and Merck, as between the Parties, to each
perfect its title in any such Collaboration Information and Inventions as set forth 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
19 - 

	 	
in Section 2.7.1, as applicable, including by causing the execution of any assignments or other legal documentation, and/or providing the other Party or its patent counsel with reasonable
access to any employees or agents who may be inventors of such Collaboration Information and Inventions. 

  

	 	2.7.4	Joint Collaboration Information and Inventions. [***] 

  

	 	2.8	Research Program Term 

  

	 	2.8.1	Term. Except as otherwise provided herein, the term of each Research Program shall commence [***] 

  

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***] 

 provided, however, that the Research Program Term for a given
Research Program (on a Research Program-by-Research Program basis) may be extended as set forth in Section 5.3. For clarity, to the extent a given Research Program is not otherwise terminated or discontinued pursuant to this Agreement, such
Research Program shall continue in accordance with the applicable Research Plan following the time that Merck exercises its Option with respect to such Research Program pursuant to Section 3.6.1. 

 

	 	2.8.2	Early Discontinuance of Research Program. Notwithstanding the provisions of Section 2.8.1, Merck shall have the right, in its discretion, to discontinue a given Research Program at any time (on a
Research Program-by-Research Program basis) prior to the scheduled end of the applicable Research Program Term by providing no less than ninety (90) days prior written notice of such discontinuance to Ambrx (which notice shall identify the
Research Program being discontinued and that the applicable Research Program is being discontinued pursuant to this Section 2.8.2). Upon delivery of such Research Program discontinuance notice by Merck to Ambrx (in accordance with
Section 10.4), the Research Program Term for the applicable Research Program shall automatically end on the date set forth in the discontinuance notice (but in any event no sooner than ninety (90) days following the delivery of such
discontinuance notice). For clarity, early discontinuance of a given Research Program under this Section 2.8.2 shall not be considered a termination of this Agreement with respect to such Research Program pursuant to Section 8.2.

  

	 	2.8.3	 Discontinuance of Research Program Activities. Upon expiration or early discontinuance of the Research Program Term for a given Research
Program, all 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
20 - 

	 	
further Research Program activities under such Research Program shall terminate (including all funding obligations of Merck with respect to such Research Program), but the other rights and
obligations under this Agreement shall not otherwise be affected and shall remain in full force and effect (including (i) any rights and obligations under any under any other Research Program, (ii) the rights of Merck to further research
and develop the Compounds and Products in accordance with this Agreement and (iii) the rights of Merck and Ambrx to further research and develop Reversion Compounds and Reversion Products in accordance with this Agreement). Immediately upon the
expiration or early discontinuance of a given Research Program, (a) each Party shall disclose to the other Party those Collaboration Information and Inventions as set forth in Section 2.7.2, and (b) Ambrx shall reimburse Merck for any
overpayments made by Merck under such Research Program, and/or Merck shall make any payments required under such Research Program (but solely to the extent such amounts were incurred and/or constitute an irrevocable obligation to pay prior to the
expiration or termination of such Research Program and are required to be paid by Merck in accordance with this Agreement), as the case may be. In addition, immediately following the applicable Option Outside Date, (x) with respect to any
Research Program for which Merck did not exercise its Option as set forth in Section 3.6, each Party shall return or cause to be returned to other Party all Confidential Information and all substances or compositions of the other Party
delivered or provided by such other Party, as well as any other material (including Materials) provided by such other Party in any medium under such Research Program (provided, however, that each Party may retain any such Confidential Information,
substances or compositions, as applicable, as are reasonably necessary for such Party’s continued practice under any licenses which survive the termination of the applicable Research Program Term and each Party may keep one copy of the
Confidential Information of the other Party in its confidential files for record purposes), and (y) with respect to any Research Program for which Merck did exercise its Option as set forth in Section 3.6, at Merck’s written request,
Ambrx shall return or cause to be returned to Merck all Confidential Information and all substances or compositions of Merck delivered or provided by Merck, as well as any other material (including Materials) provided by Merck in any medium under
such Research Program (provided, however, that Ambrx may retain one copy of the Confidential Information of Merck in its confidential files for record purposes). 

  

	 	2.9	Materials 

 Each Party shall provide the other with sufficient quantities of its
research materials to conduct the activities under the Research Program as set forth in the applicable Research Plan or as otherwise determined by the Committee (“Materials”, provided that for clarity, Compounds shall not be
considered “Materials”), which Materials shall be used solely for the purpose of enabling the Parties to perform their respective activities under the Research Program in accordance with the terms of this Agreement. The Materials are not
to be used in humans, nor shall any of the Materials, or any derivatives, analogs, modifications or components thereof, be transferred, delivered or disclosed to any Third Party (other than to permitted subcontractors hereunder in accordance with
Section 2.2.3) without the prior written approval of the delivering Party. Any unused Materials and any derivatives, analogs, 

  
 - 21 - 

 
modifications or components thereof shall be, at the delivering Party’s option, either returned or destroyed in accordance with instructions given by the delivering Party. All such
destruction shall be in accordance with Applicable Laws. THE MATERIALS ARE PROVIDED “AS IS” AND WITHOUT ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS
FOR ANY PARTICULAR PURPOSE OR ANY WARRANTY THAT THE USE OF THE MATERIALS WILL NOT INFRINGE OR VIOLATE ANY PATENT OR OTHER PROPRIETARY RIGHTS OF ANY THIRD PARTY. 
  

	 	2.10	Research Program Costs 

 Except as otherwise set forth in Section 5.2, each
Party shall bear its own costs in connection with performing Research Program activities. 
  

	 	2.11	Exclusive Efforts 

  

	 	2.11.1	Ambrx. [***] 

 [***] 

[***]. 
  

	 	2.11.2	Merck. [***]. 

 [***] 

 

	 	2.12	Compliance with Law and Ethical Business Practices 

  

	 	2.12.1	Ambrx acknowledges that Merck’s corporate policy requires that Merck’s business must be conducted within the letter and spirit of the law. By signing this Agreement, Ambrx agrees to conduct the services
contemplated herein in a manner which is consistent with both law and good business ethics. 

  

	 	2.12.2	 Neither Party shall make any payment, either directly or indirectly, of money or other assets, including but not limited to the compensation
such Party derives from this Agreement (hereinafter collectively referred as a “Payment”), to government or political party officials, officials of international public organizations, candidates for public office, or representatives
of other businesses or persons acting on behalf of any of the foregoing (hereinafter collectively referred as “Officials”) where such Payment would constitute violation of any

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
22 - 

	 	
law. In addition regardless of legality, neither Party shall make any Payment either directly or indirectly to Officials if such Payment is for the purpose of influencing decisions or actions
with respect to the subject matter of this Agreement or any other aspect of such Party’s or the other Party’s business. 

  

	 	2.12.3	Each Party acknowledges that no employee of the other Party or its Affiliates shall have authority to give any direction, either written or oral, relating to the making of any commitment by such Party or its
agents to any Third Party in violation of terms of this Section 2.12. 

  

	 	2.12.4	Each Party certifies to the other Party that as of the date of this Agreement that such Party has screened itself, and its officers and directors against the Exclusions Lists and that it has informed the other
Party whether it, or any of its officers or directors, has been in Violation. After the execution of this Agreement, each Party shall notify the other Party in writing immediately if any such Violation occurs or comes to its attention.

  

	 	2.12.5	Each Party shall indemnify and hold the other Party and any of its Affiliates harmless from and against any and all liabilities (including all costs and reasonable attorneys’ fees associated with defending
against such claims) that may arise by reason of the acts or omissions of it or its agents or other Third Parties acting on its behalf which would constitute a violation of this Section 2.12. 

 

	 	2.13	Regulatory Matters. In the event that Merck determines that any regulatory filings for any Compounds or Products are required for any activities hereunder (including any activities under the Research
Program), including INDs, NDAs and other Marketing Authorizations (as applicable), then as between the Parties, Merck shall have the sole right, in its discretion, to obtain such regulatory filings (in its (or its Affiliate’s or Related
Party’s) name) and as between the Parties, Merck (or its Affiliate or Related Party) shall be the owner of all such regulatory filings. As between the Parties, Merck (or its Affiliate or Related Party) shall have the sole right to communicate
and otherwise interact with Regulatory Authorities with respect to the Compounds and/or Products (including during the Research Program Term). For clarity, Ambrx (and its Affiliates) shall have no right to, and shall not, make any regulatory filings
related to any Compounds or Products or otherwise interact with any Regulatory Authorities with respect to the Compounds or Products. 

  

	 	2.14	[***]. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
23 - 

 ARTICLE 3 

LICENSE; OPTION; DEVELOPMENT AND COMMERCIALIZATION 
  

	 	3.1	License Grant 

  

	 	3.1.1	By Ambrx. 

 Research Program Licenses 

 

	 	(a)	Subject to the rights retained by Ambrx in Section 3.1.1(c) and the terms and conditions of this Agreement, Ambrx hereby grants to Merck an exclusive license (even as to Ambrx and its Affiliates) to carry
out the activities in the Research Program during the Research Program Term in the Territory in the Field under Ambrx Patent Rights, with the right to sublicense as set forth in Section 3.7.1. 

 

	 	(b)	Subject to the rights retained by Ambrx in Section 3.1.1(c) and the terms and conditions of this Agreement, Ambrx hereby grants to Merck an exclusive license (even as to Ambrx and its Affiliates) to carry
out the activities in the Research Program during the Research Program Term in the Territory in the Field under Ambrx Know-How, with the right to sublicense as set forth in Section 3.7.1. 

 

	 	(c)	[***]. 

 Development, Manufacturing and Commercialization Licenses 

 

	 	(d)	Subject to the rights retained by Ambrx in Section 3.1.1(f) and the terms and conditions of this Agreement, Ambrx hereby grants to Merck an exclusive license (even as to Ambrx and its Affiliates) in the
Territory under the Ambrx Patent Rights, with the right to sublicense as set forth in Section 3.7.1, to research, develop, make, have made, use, offer to sell, sell, export and/or import Compounds and Products for use in the Field; provided,
however that Merck shall only have the right to exercise such license with respect to those Compounds (and the Products containing such Compounds) Discovered under a Research Program for which Merck has exercised its Option in accordance with
Section 3.6. For clarity, the license granted under this Section 3.1.1(d) shall terminate with respect to any Compounds (and Products containing such Compounds) Discovered under a given Research Program as to which the applicable Option
has not been exercised by Merck as of the applicable Option Outside Date. 

  

	 	(e)	 Subject to the rights retained by Ambrx in Section 3.1.1(f) and the terms and conditions of this Agreement, Ambrx hereby grants to Merck
an exclusive license (even as to Ambrx and its Affiliates) in the Territory under the Ambrx Know-How, with the right to sublicense as set forth in Section 3.7.1, to research, develop, make, have made, use, offer to sell, sell, export and/or
import Compounds and Products for use in the Field; provided, however that Merck shall only have the right to exercise such license with respect to those Compounds (and the Products containing such Compounds) Discovered under a Research Program

  
 - 24 - 

	 	
for which Merck has exercised its Option in accordance with Section 3.6. For clarity, the license granted under this Section 3.1.1(e) shall terminate with respect to any Compounds (and
Products containing such Compounds) Discovered under a given Research Program as to which the applicable Option has not been exercised by Merck as of the applicable Option Outside Date. 

 

	 	(f)	[***] 

 Additional Linker
Technology Licenses 
  

	 	(g)	Ambrx hereby grants to Merck [***]. 

  

	 	3.1.2	By Merck. 

 Research Program Licenses 

 

	 	(a)	If Merck requests Ambrx to perform activities under the Research Program that require a license under any Merck Patent Rights or Merck Know-How, Merck hereby grants a non-exclusive, non-transferable,
non-sublicensable, royalty free, license to Ambrx under such Merck Patent Rights or Merck Know-How, as applicable, solely as are necessary to perform such activities under the Research Program. 

Development, Manufacturing and Commercialization Licenses 
  

	 	(b)	With respect to a given Reversion Compound (and Reversion Product incorporating such Reversion Compound), Merck hereby grants to Ambrx a non-exclusive license, [***]. 

 

	 	(c)	[***]. 

  

	 	3.2	[***]  

  

	 	3.3	No Grant of Inconsistent Rights by Ambrx. 

  

	 	3.3.1	During the Term, Ambrx (and its Affiliates) shall not assign, transfer, convey or otherwise grant to any Person, or otherwise encumber (including through lien, charge, security interest, mortgage, encumbrance or
otherwise), any rights to any Ambrx Know-How or Ambrx Patent Rights (or any rights to any intellectual property that would otherwise be included in the Ambrx Know-How or Ambrx Patent Rights) in any manner that is inconsistent with or would interfere
with the exercise of the rights or licenses granted to Merck hereunder, including the exercise of the Options. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
25 - 

	 	3.3.2	In addition, following the Effective Date [***], as applicable, Ambrx (and its Affiliates) shall not assign, transfer, convey or otherwise grant to any Person,
or otherwise encumber (including through lien, charge, security interest, mortgage, encumbrance or otherwise) any rights to any Compounds or Products containing such Compounds (provided that Ambrx shall grant to Merck the rights to the Compounds and
Products as set forth herein). 

  

	 	3.3.3	Without limiting the foregoing, during the Term, Ambrx (and its Affiliates) shall not use (and shall not grant to any Third Party the right to use) any Compounds or Products containing such Compounds for any
purpose (including the research, development, manufacturing or commercialization thereof), except for Ambrx’s performance of the activities to be performed by Ambrx under the Research Program as set forth in the Research Plan in accordance with
this Agreement. 

  

	 	3.3.4	Notwithstanding the foregoing, (y) in the event that Merck does not exercise its Option with respect to a given Research Program in accordance with Section 3.6.1, then the foregoing provisions of this
Section 3.3 shall not apply with respect to Reversion Compounds or Reversion Products for the applicable Selected Target; and (z) in the event that this Agreement expires or is terminated with respect to all Compounds/Products for a
particular Selected Target in accordance with Article 8, then the foregoing provisions of this Section 3.3 shall not apply with respect to Reversion Compounds/Reversion Products for such Selected Target. 

 

	 	3.4	No Implied Licenses 

 Except as specifically and expressly set forth in this
Agreement, neither Party shall acquire any license or other intellectual property interest, by implication or otherwise, in any Confidential Information disclosed to it under this Agreement, know how or under any patents or patent applications owned
or controlled by the other Party or its Affiliates. 
  

	 	3.5	[***] 

 [***] 
  

	 	3.6	Merck Option 

  

	 	3.6.1	Grant of Option; Exercise of Option. [***]: 

  

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***]. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
26 - 

 [***] 

 

	 	3.6.2	Technology Transfer Upon Option Exercise; Transfer of Activities. As soon as reasonably practicable after Merck exercises a given Option pursuant to Section 3.6.1, Ambrx shall disclose to Merck in
English (and deliver in writing or in an electronic format) all relevant Ambrx Collaboration Information and Inventions not previously disclosed in writing to Merck related to the Compounds under the Research Program for which such Option was
exercised. In addition, upon the request of Merck following Merck’s exercise of a given Option pursuant to Section 3.6.1, Ambrx shall transfer to Merck all relevant research cell lines, biologic materials and other materials (including the
Materials, and for clarity, Merck shall have the right to use such Materials solely in connection with the Compounds and Products hereunder, notwithstanding the provisions of Section 2.9) necessary or reasonably useful for the research,
development, manufacture or sale of the applicable Compounds and Products under the Research Program for which such Option was exercised, including for expressing or producing such Compounds and Products. Notwithstanding the foregoing, Ambrx shall
not be obligated to disclose or transfer to Merck any cell line that does not express the polypeptide component of a Compound or Product (other than, as covered under Section 2.5.2, those biologic materials and other materials that constitute
EuCODETM Technology or ReCODETM Technology or other Ambrx Background Know-How, which shall be provided to Merck as set forth therein). Ambrx shall assist Merck to effect an orderly transition and uninterrupted development and manufacturing
of the Compounds. Thereafter during the Term, Ambrx shall cooperate with Merck and promptly disclose to Merck in English (and deliver in writing or in an electronic format) any other intellectual property relating to such Compounds (or the research,
development, making, use or sale thereof) as may be developed or identified by Ambrx (or its Affiliates), to the extent that Merck has a license thereto under this Agreement. 

 

	 	3.6.3	Revisions to Research Plan Upon Exercise of Option. Within thirty (30) days after Merck has exercised its Option with respect to a given Research Program, to the extent that the Research Program Term
for such Research Program has not yet ended in accordance with this Agreement, the Committee shall review and, if determined by the Committee, amend, the Research Plan for such Research Program for the further research activities to be conducted
under such Research Program post Option exercise. 

  

	 	3.7	Sublicensing. 

  

	 	3.7.1	[***] 

 [***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
27 - 

	 	3.7.2	[***] 

  

	 	3.8	Development, Manufacture and Commercialization 

  

	 	3.8.1	Compounds and Products By Merck. Following the valid exercise of the applicable Option by Merck, Merck (and its Affiliates), either itself or together with Third Parties, shall have the sole right, at its
expense, to research, develop (including pre-clinical and clinical development), manufacture, register and commercialize Compounds Discovered under such Research Program (other than Reversion Compounds) and Products containing such Compounds (other
than Reversion Products) against any and all targets, and Ambrx (and its Affiliates) shall have no right to do so. In the event that Merck exercises its Option with respect to a given Research Program, then Merck shall use Commercially Reasonable
Efforts to develop and commercialize at least one Product (containing a Compound developed under such Research Program) in the Field in the Major Markets. All other development and commercialization efforts with respect to the Compounds and Products
shall be at the discretion of Merck. For clarity, in the event that Merck does not exercise its Option with respect to a given Research Program, then the licenses granted by Ambrx to Merck as set forth in Sections 3.1.1(d) and 3.1.1(e) hereunder for
the Compounds Discovered under such Research Program (and Products containing such Compounds) shall terminate. 

 Upon
expiration of the Research Program Term, and once per year thereafter until the First Commercial Sale of a Product, Merck shall, as soon as reasonably practicable after receipt of a written request by Ambrx, provide Ambrx with a written report that
summarizes the development progress and plans for such Product and the related Compound. 
  

	 	3.8.2	Reversion Compounds and Reversion Products By Ambrx and Merck. Following the completion (or earlier termination) of a given Research Program, Ambrx (and its Affiliates), either itself or together with
Third Parties, and Merck (and its Affiliates), either itself or together with Third Parties, shall each have the right, at its expense, to develop (including pre-clinical and clinical development), manufacture, register and commercialize any
Reversion Compounds (if any) and Reversion Products (if any). For clarity, except as expressly set forth in Section 3.1.2(b), Section 3.1.2(c) or Section 8.4(h) (if applicable), Merck is not granting any rights or licenses to any
Merck Know-How, Merck Patent Rights or any other intellectual property of Merck or any of its Affiliates in connection therewith. 

  

	 	3.9	Excused Performance 

 In addition to the provisions of Article 6 hereof, the
obligations of Merck with respect to any Product under Section 3.8.1 are expressly conditioned upon the continuing absence of any adverse condition or event relating to the safety or efficacy of the Product, and the

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
28 - 

 
obligation of Merck to develop or commercialize any such Product may be delayed or suspended so long as in Merck’s reasonable, good-faith opinion any such condition or event exists. 

ARTICLE 4 

CONFIDENTIALITY AND PUBLICATION 
  

	 	4.1	Nondisclosure Obligation 

 All Confidential Information disclosed by one Party to
the other Party hereunder shall be maintained in confidence by the receiving Party and shall not be disclosed to any Third Party or used for any purpose except as set forth herein without the prior written consent of the disclosing Party, except to
the extent that such Confidential Information: 
  

	 	(a)	is known by the receiving Party at the time of its receipt, and not through a prior disclosure by the disclosing Party, as documented by the receiving Party’s business records; 

 

	 	(b)	is in the public domain by use and/or publication before its receipt from the disclosing Party, or thereafter enters the public domain through no fault of the receiving Party; 

 

	 	(c)	is subsequently disclosed to the receiving Party by a Third Party who may lawfully do so and is not under an obligation of confidentiality to the disclosing Party; 

 

	 	(d)	is developed by the receiving Party independently of Confidential Information received from the disclosing Party, as documented by the receiving Party’s business records; 

 

	 	(e)	is disclosed to governmental or other regulatory agencies in order to obtain patents or to gain or maintain approval to conduct clinical trials or to market Product, but such disclosure may be only to the extent
reasonably necessary to obtain patents or authorizations; 

  

	 	(f)	is deemed necessary by Merck to be disclosed to Related Parties, agents, consultants, and/or other Third Parties for any and all purposes Merck and its Affiliates deem necessary or advisable in the ordinary
course of business in accordance with this Agreement (including the exercise of licenses granted to Merck hereunder) on the condition that such Third Parties agree to be bound by confidentiality and non-use obligations that substantially are no less
stringent than those confidentiality and nonuse provisions contained in this Agreement; provided, however, that the term of confidentiality for such Third Parties shall be no less than ten (10) years; or 

 

	 	(g)	 is deemed necessary by counsel to the receiving Party to be disclosed to such Party’s attorneys, independent accountants or financial
advisors for the sole 

  
 - 29 - 

	 	
purpose of enabling such attorneys, independent accountants or financial advisors to provide advice to the receiving Party, on the condition that such attorneys, independent accountants and
financial advisors agree to be bound by the confidentiality and non-use obligations no less protective than those set forth in this Agreement; provided, however, that the term of confidentiality for such attorneys, independent accountants and
financial advisors shall be no less than ten (10) years. 

  

	 	(h)	in connection with a financing, merger, or acquisition, each Party shall have the further right to disclose the material terms of this Agreement under a confidentiality obligation no less protective than those
set forth in this Agreement. 

  

	 	(i)	the Parties shall agree in advance with each other on the terms of this Agreement to be redacted in any Securities and Exchange Commission filings. 

Any combination of features or disclosures shall not be deemed to fall within the foregoing exclusions merely because individual features are
published or available to the general public or in the rightful possession of the receiving Party unless the combination itself and principle of operation are published or available to the general public or in the rightful possession of the
receiving Party. 
 If a Party is required by judicial or administrative process to disclose Confidential Information that is subject to the
non-disclosure provisions of this Section 4.1, such Party shall promptly inform the other Party of the disclosure that is being sought in order to provide the other Party an opportunity to challenge or limit the disclosure obligations.
Confidential Information that is disclosed by judicial or administrative process shall remain otherwise subject to the confidentiality and non-use provisions of this Section 4.1, and the Party disclosing Confidential Information pursuant to
Applicable Law or court order shall take all steps reasonably necessary, including obtaining an order of confidentiality, to ensure the continued confidential treatment of such Confidential Information. 

 

	 	4.2	Publication 

 Merck and Ambrx each acknowledge the other Party’s interest in
publishing the results of its research in order to obtain recognition within the scientific community and to advance the state of scientific knowledge. Each Party also recognizes the mutual interest in obtaining valid patent protection and in
protecting business interests and trade secret information. Consequently, except for disclosures permitted pursuant to Section 4.1, either Party, its employees or consultants wishing to make a publication with respect to the research under the
Research Program hereunder shall deliver to the other Party a copy of the proposed written publication or an outline of an oral disclosure at least sixty (60) days prior to submission for publication or presentation. The reviewing Party shall
have the right (a) to propose modifications to the publication or presentation for patent reasons, trade secret reasons or business reasons or (b) to request a reasonable delay in publication or presentation in order to protect patentable
information. If the reviewing Party requests a delay, the publishing Party shall delay submission or presentation for a period of ninety 

  
 - 30 - 

 
(90) days to enable patent applications protecting each Party’s rights in such information to be filed in accordance with Article 7 below. Upon expiration of such ninety (90) days,
the publishing Party shall be free to proceed with the publication or presentation. If the reviewing Party requests modifications to the publication or presentation, the publishing Party shall edit such publication to prevent disclosure of trade
secret or proprietary business information prior to submission of the publication or presentation. 
  

	 	4.3	Publicity/Use of Names 

 No disclosure of the existence, or the terms, of this
Agreement may be made by either Party, and neither Party shall use the name, trademark, trade name or logo of the other Party, its Affiliates or their respective employees in any publicity, promotion, news release or disclosure relating to this
Agreement or its subject matter, without the prior express written permission of the other Party, except as may be required by Applicable Law or as permitted pursuant to Section 4.1; provided that in the event disclosure is required by
Applicable Law, the disclosing Party shall use good-faith efforts to give the non-disclosing Party an opportunity, with reasonable advance notice, to review and comment on any proposed disclosure. Notwithstanding the foregoing, Ambrx shall have the
right to issue a press release regarding the execution of this Agreement, which press release shall be in a form agreed to by the Parties in writing in advance of the issuance of such press release. Disclosure of Confidential Information either for
which consent has previously been obtained or which has previously been disclosed publicly will not require advance approval. 
  

	 	4.4	Clinical Trial Register 

 Notwithstanding the foregoing, Merck shall have the
right to publish the results or summaries of results of any clinical trials conducted hereunder with respect to a Product on Merck’s clinical trial register. 
  

	 	4.5	Remedies 

 Each Party shall be entitled to seek, in addition to any other right or
remedy it may have, at law or in equity, a temporary injunction, without the posting of any bond or other security, enjoining or restraining the other Party from any violation or threatened violation of this Article 4. 

ARTICLE 5 
 PAYMENTS;
ROYALTIES AND REPORTS 
  

	 	5.1	Research Program Funding 

 In consideration for Ambrx’s performance of its
obligations under the Research Program and the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How, upon the terms and conditions contained herein, Merck shall pay to Ambrx, within ten (10) days following the Effective Date, an
upfront payment in the amount of Fifteen Million Dollars ($15,000,000), which shall be non-refundable and non-creditable. 

  
 - 31 - 

	 	5.2	FTE Funding under the Research Program 

  

	 	5.2.1	General. In consideration for Ambrx’s provision of FTEs for the performance of its obligations under the Research Program, upon the terms and conditions contained herein, Merck (i) shall pay
Ambrx the applicable FTE Rate per year during the Research Program Term for each FTE provided by Ambrx in accordance with this Section 5.2 and (ii) shall reimburse Ambrx for its direct, out-of-pocket research costs incurred by Ambrx and
paid to a Third Party contractor solely to perform research activities under the Research Program pursuant to the Research Plan (“Third Party Research Costs”) in accordance with this Section 5.2. The number of FTEs to be
provided by Ambrx for the performance of the Research Program per year shall be set forth in the applicable Research Plan; provided, however, that the Committee shall have the right to revise the number of FTEs in accordance with Section 2.4.
Such FTE funding shall be payable in advance in quarterly installments due on the first day of the applicable Calendar Quarter; provided, however, that the payments for the first Calendar Quarter and the last Calendar Quarter of a given Research
Program Term shall be made on a pro rata basis; and provided, further, that the payment for the second Calendar Quarter of 2012 (on a pro-rata basis) shall be payable within ten (10) days following the later of (i) the Effective Date; and
(ii) the first day of such Calendar Quarter. 

 The amount of any Third Party Research Costs which will be reimbursed by
Merck shall be expressly set forth in the applicable Research Plan (and the Research Plan shall also identify the Third Party contractor performing the applicable activities under the Research Plan and the activities to be performed by such Third
Party contractor). At the end of each Calendar Quarter during the Research Program Term, Ambrx shall invoice Merck for the Third Party Research Costs incurred during such Calendar Quarter to the extent that such Third Party Research Costs were
expressly set forth in the Research Plan. Merck shall pay such invoiced amounts within thirty (30) days of receipt of the invoice. Notwithstanding the foregoing, Merck shall only be obligated to reimburse Ambrx for those Third Party Research
Costs which are expressly agreed to by the Parties and set forth in the Research Plan (including with respect to the amount of such Third Party Research Costs and with respect to the activities to be performed by the applicable Third Party
contractor) and Ambrx shall be solely responsible for (and shall not be entitled to reimbursement for) any other costs, including any costs in excess of such agreed upon amount or any costs not directly related to the performance of activities under
the Research Plan or any costs not approved by the Committee. 
  

	 	5.2.2	 Reporting and Reconciliation. Ambrx shall, within [***] days following the end of
each Calendar Quarter during the Research Program Term, deliver to Merck a 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
32 - 

	 	
written report detailing the number of FTEs actually utilized in such Calendar Quarter for the performance of Research Program activities, including a description of the activities performed (and
Merck shall have the right to audit Ambrx’s records in connection therewith in accordance with Section 5.7, mutatis mutandis). In the event that the number of FTEs actually utilized in such Calendar Quarter is less than the number
of FTEs for which Merck made payment in advance pursuant to Section 5.2.1, then at Merck’s option, Ambrx shall either refund or credit Merck for the difference between the payment made by Merck and the actual payment due for such FTEs
(provided that if Merck opts for a refund, such refund shall be made by Ambrx within [***] days following notice by Merck thereof and if Merck opts for a credit, Merck shall be entitled to a credit against any future FTE amounts payable by Merck
pursuant to this Section 5.2). For clarity, in no event shall Ambrx be entitled to receive payment for (and Ambrx shall be solely responsible for) any and all FTEs in a given Calendar Quarter which are in excess of the number of FTEs authorized
to be utilized to conduct the Research Program activities in such Calendar Quarter as set forth in the applicable Research Plan or as otherwise expressly approved in writing by the Committee. 

 

	 	5.2.3	Elimination of FTEs. Notwithstanding anything to the contrary in this Section 5.2, in the event that the Parties or the Committee determines to reduce the number of FTEs for the conduct of Research
Program activities from those set forth in the applicable Research Plan (each, an “Eliminated FTE”), then Merck shall only be required to fund such reduced number of FTEs in accordance with the provisions of this Section 5.2
(and Merck shall not be required to fund any Eliminated FTEs); provided, however, that to the extent that Ambrx is unable to reassign (after using Commercially Reasonable Efforts) such Eliminated FTEs to other activities under the Research Program
hereunder or to other activities at Ambrx (or its Affiliates), then, for a period not to exceed [***] months, Merck shall continue to fund such Eliminated FTEs in accordance with this
Section 5.2 (provided that for clarity, after such [***] month period, Merck shall no longer be required to fund such Eliminated FTEs). 

  

	 	5.3	Extension of Research Program Term 

 Merck may, at its sole discretion and upon
written notice to Ambrx no later than ninety (90) days prior to the expiration of the applicable Research Program Term, extend Ambrx’s participation in any of the Research Programs for one (1) additional year each. In such event, the
applicable Research Program Term shall be extended to include such additional year. [***] 
  

	 	5.4	Milestone Payments 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
33 - 

	 	5.4.1	Research Milestones. In consideration for the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How, upon the terms and conditions contained herein, Merck shall pay to Ambrx the
following amounts, which shall be non-refundable and shall be non-creditable, with respect to each Selected Target for which Merck achieves the following milestone event during the Term (collectively, the “Research Milestones”):

  

					
	 Event
	  	Payment Amount	 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 

 For clarity, each of the foregoing Research Milestones in this Section 5.4.1 shall be payable [***] 

The maximum amount payable by Merck under this Section 5.4.1 is [***]. 

 

	 	5.4.2	Development and Commercialization Milestones. In consideration for the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How, upon the terms and conditions contained herein, Merck shall
pay to Ambrx the following amounts, which shall be non-refundable and shall be non-creditable, with respect to each Selected Target for which Merck achieves the following milestone event during the Term (provided, however that for clarity, the
following amounts shall only be triggered by Compounds (or Products containing such Compounds, as applicable) for which Merck exercised its Option pursuant to Section 3.6.1) (the “Development/Commercial Milestones”):

  

					
	 Event
	  	Payment Amount	 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 

 For clarity, [***] 

[***]. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
34 - 

	 	5.4.3	Sales Milestones. In consideration for the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How, upon the terms and conditions contained herein, Merck shall pay to Ambrx the following
amounts, which shall be non-refundable and shall be non-creditable, with respect to each Selected Target for which Merck achieves the following milestone event during the Term (provided, however that for clarity, in determining whether the following
events were achieved, only Net Sales of the Products containing Compounds for which Merck exercised its Option pursuant to Section 3.6.1 shall be included): 

 

					
	 Event
	  	Payment Amount	 
	 First achievement of aggregate Net Sales in the Territory of all Products in the Territory for use against the applicable Selected
Target in a given Calendar Year exceeding [***] for such Calendar Year
	  	 	[***	] 
	 First achievement of aggregate Net Sales in the Territory of all Products for use against the applicable Selected Target in a given
Calendar Year exceeding [***] for such Calendar Year
	  	 	[***	] 

 [***] 

[***]. 
  

	 	5.4.4	Reporting and Payment. Merck shall notify Ambrx in writing within thirty (30) days following the achievement of each milestone as set forth in Section 5.4.1, 5.4.2 or 5.4.3, as applicable, and
shall make the appropriate milestone payment within thirty (30) days after the achievement of such milestone. 

  

	 	5.5	Royalties 

  

	 	5.5.1	Royalties Payable By Merck. Subject to the terms and conditions of this Agreement, Merck shall pay Ambrx royalties as set forth in this Section 5.5. 

 

	 	5.5.2	Patent Royalties. Subject to the provisions of Section 5.5.3, Merck shall pay Ambrx royalties in an amount equal to the following percentage of Net Sales of Royalty Products sold by Merck or its
Related Parties in the Territory for use in the Field, provided that the manufacture, use or sale of the applicable Royalty Product would infringe a Valid Patent Claim in the country of sale: 

 

	 	(a)	[***] of such Net Sales in the Territory in each Calendar Year up to and including Net Sales of [***]; 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
35 - 

	 	(b)	[***] of such Net Sales in the Territory in each Calendar Year for the portion of such Net Sales exceeding [***] up to and including [***]; and 

 

	 	(c)	[***] of such Net Sales in the Territory in each Calendar Year for the portion of such Net Sales exceeding [***]. 

[***] 
  

	 	5.5.3	[***]. 

  

	 	5.5.4	Royalty Period. Royalties on a given Royalty Product at the rates set forth above shall commence with the First Commercial Sale of the Royalty Product and continue on a country-by-country basis until the
expiration of the later of: (i) the last-to-expire Valid Patent Claim that would be infringed by the manufacture, use or sale of such Royalty Product in such country; or (ii) the period of ten (10) years following the First Commercial
Sale of such Royalty Product in such country (the “Royalty Period”). [***] 

  

	 	(i)	[***] 

  

	 	(ii)	[***] 

  

	 	(iii)	[***] 

  

	 	(iv)	[***] 

  

	 	(v)	[***] 

  

	 	(vi)	[***] 

  

	 	5.5.5	Royalties for Bulk Compound. In those cases in which Merck sells bulk Compound rather than Product in packaged form to an independent Third Party, the royalty obligations of this Section 5.5 shall be
applicable to the bulk Compound (but solely to the extent that a royalty would otherwise be payable on the Product incorporating such Compound). 

  

	 	5.5.6	Compulsory Licenses. If a compulsory license is granted to a Third Party with respect to Royalty Product in any country in the Territory with a royalty rate lower than the royalty rate provided by
Section 5.5.2 or 5.5.3, as applicable, then the royalty rate to be paid by Merck on Net Sales in that country under Section 5.5.2 or 5.5.3, as applicable, shall be reduced to the rate paid by the compulsory licensee. 

 

	 	5.5.7	[***] 

  
 - 36 - 

	 	5.6	Reports; Payment of Royalty 

 During the Term following the First Commercial Sale
of a Product, Merck shall furnish to Ambrx a quarterly written report for the Calendar Quarter showing the Net Sales of all Royalty Products subject to royalty payments sold by Merck and its Related Parties in the Territory for use in the Field
during the reporting period and the royalties payable under this Agreement. Reports shall be due on the [***] day following the close of each Calendar Quarter. Royalties shown to have accrued by
each royalty report shall be due and payable on the date such royalty report is due. Merck shall keep complete and accurate records in sufficient detail to enable the royalties payable hereunder to be determined. 

 

	 	5.7	Audits 

  

	 	(a)	Upon the written request of Ambrx and not more than once in each Calendar Year, Merck shall permit an independent certified public accounting firm of nationally recognized standing selected by Ambrx and
reasonably acceptable to Merck, at Ambrx’s expense, to have access during normal business hours to such of the records of Merck as may be reasonably necessary to verify the accuracy of the royalty reports hereunder for any Calendar Year ending
not more than twenty-four (24) months prior to the date of such request. The accounting firm shall disclose to Ambrx only whether the royalty reports are correct or incorrect and the amount of any discrepancy. No other information shall be
provided to Ambrx. 

  

	 	(b)	If such accounting firm identifies a discrepancy made during such period, the appropriate Party shall pay the other Party the amount of the discrepancy within thirty (30) days of the date Ambrx delivers to
Merck such accounting firm’s written report so concluding, or as otherwise agreed upon by the Parties. [***] 

  

	 	(c)	[***]. 

  

	 	(d)	Upon the expiration of twenty-four (24) months following the end of any Calendar Year, the calculation of royalties payable with respect to such Calendar Year shall be binding and conclusive upon Ambrx, and
Merck and its Related Parties shall be released from any liability or accountability with respect to royalties for such Calendar Year. 

  

	 	(e)	Ambrx shall treat all financial information subject to review under this Section 5.7 or under any sublicense agreement in accordance with the confidentiality and non-use provisions of this Agreement, and
shall cause its accounting firm to enter into an acceptable confidentiality agreement with Merck and/or its Related Parties obligating it to retain all such information in confidence pursuant to such confidentiality agreement. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
37 - 

	 	5.8	Payment Exchange Rate 

 All payments to be made by Merck to Ambrx under this
Agreement shall be made in United States dollars and may be paid by bank wire transfer in immediately available funds to such bank account in the United States as may be designated in writing by Ambrx from time to time. In the case of sales outside
the United States, the rate of exchange to be used in computing the monthly amount of currency equivalent in United States dollars due Ambrx shall be made at the monthly rate of exchange utilized by Merck in its worldwide accounting system [***]. 
  

	 	5.9	Income Tax Withholding 

 [***] 

 

	 	5.10	Reporting and Payments by Ambrx with Respect to Reversion Compounds and Reversion Products. 

Upon expiration of the Research Program Term, and once per year thereafter, Ambrx shall, upon request by Merck, provide Merck with a written
report that summarizes its development progress and plans for Reversion Compounds and Reversion Products. 
 With respect to any Reversion
Compound and Reversion Product, as applicable, Ambrx shall be required to pay to Merck the milestones set forth in Section 5.4 and the royalties set forth in Section 5.5 that Merck would have been required to pay to Ambrx pursuant to such
Sections if Merck had developed and commercialized such Reversion Compound and Reversion Product (as if Merck had exercised the Option for the Research Program under which such Reversion Compound was developed), mutatis mutandis; provided,
however, that Ambrx shall only be required to pay [***] of the amount of the milestone or royalty, as applicable, that would have been payable by Merck. [***] 

[***] 
 [***] 

 

	 	5.11	Ambrx Third Party Licenses 

 Notwithstanding the provisions of Section 5.5.7,
and except as otherwise agreed by the Parties in writing, Ambrx shall be solely responsible for satisfying all costs and payments of any kind (including all upfront fees, annual payments, milestone payments and royalty payments) (i) arising
under any license or other grant of rights from a Third Party to Ambrx (or any of its Affiliates), including under any of the Ambrx Third Party License Agreements, which payments arise as a result of any activities hereunder and/or
(ii) otherwise arising as a result of the use of Ambrx’s proprietary platform technology 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
38 - 

 
(including ReCODETM Technology and/or EuCODETM Technology) as contemplated hereunder. 

ARTICLE 6 

REPRESENTATIONS AND WARRANTIES; COVENANTS 
  

	 	6.1	Mutual Representations and Warranties 

 Each Party represents and warrants to the
other Party the following as of the Effective Date of this Agreement: 
  

	 	(a)	Corporate Power. Such Party is duly organized and validly existing under the laws of the state of its organization and has full corporate power and authority to enter into this Agreement and to perform its
obligations hereunder. 

  

	 	(b)	Due Authorization and Execution. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby have been duly authorized by the necessary corporate actions of
such Party. This Agreement has been duly executed by such Party. This Agreement and any other documents contemplated hereby constitute valid and legally binding obligations of such Party enforceable against it in accordance with their respective
terms, except to the extent that enforcement of the rights and remedies created thereby is subject to bankruptcy, insolvency, reorganization, moratorium and other similar laws of general application affecting the rights and remedies of creditors.

  

	 	(c)	Non-Contravention. The execution, delivery and performance by such Party of this Agreement and any other agreements and instruments contemplated hereunder will not (i) in any material respect violate
any statute, regulation, judgment, order, decree or other restriction of any governmental authority to which such Party is subject, (ii) violate any provision of the corporate charter, by-laws or other organizational documents of such Party, or
(iii) constitute a material violation or breach by such Party of any provision of any material contract, agreement or instrument to which such Party is a party or to which such Party may be subject although not a party (including, with respect
to Ambrx, the Ambrx Third Party License Agreements). 

  

	 	6.2	Ambrx Representations and Warranties 

  

	 	6.2.1	As of the Effective Date and Research Plan Approval Date. Ambrx represents and warrants to Merck that as of the Effective Date, solely with respect [***] is approved by the Committee, the following
representations and warranties as of such approval date solely with respect to [***], as applicable: 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
39 - 

	 	(a)	to the best of Ambrx’s knowledge, the Ambrx Patent Rights and Ambrx Know-How exist and are not invalid or unenforceable, in whole or in part; 

 

	 	(b)	it has the full right, power and authority, including the full right, power and authority under the Ambrx Third Party License Agreements, to enter into this Agreement, to perform the Research Program and to grant
the licenses granted under Article 3 hereof; 

  

	 	(c)	it (and its Affiliates) has not previously (i) assigned, transferred, conveyed or otherwise encumbered its right, title and/or interest in Ambrx Patent Rights or Ambrx Know-How, or (ii) granted any
rights to any Third Parties, in either case that would conflict with the rights granted to Merck hereunder; 

  

	 	(d)	to the best of Ambrx’s knowledge, it is the sole and exclusive owner or sole and exclusive licensee (pursuant to the Ambrx Third Party License Agreements, as applicable) of the Ambrx Patent Rights and Ambrx
Know-How, all of which are (and shall be) free and clear of any liens, charges and encumbrances, and no other person, corporate or other private entity, or governmental entity or subdivision thereof, has or shall have any claim of ownership
whatsoever with respect to the Ambrx Patent Rights and/or Ambrx Know-How except pursuant to the Ambrx Third Party License Agreements; 

  

	 	(e)	to the best of Ambrx’s knowledge, the exercise of the license granted to Merck under the Ambrx Patent Rights and Ambrx Know-How, including the research, development, manufacture, use, sale, export and import
of Compounds and Products, do not interfere with or infringe any intellectual property rights owned or possessed by any Third Party; 

  

	 	(f)	there are no claims, judgments or settlements against or owed by Ambrx (or any of its Affiliates) and, to the best of Ambrx’s knowledge, no pending or threatened claims or litigation relating to the Ambrx
Patent Rights and/or Ambrx Know-How; 

  

	 	(g)	the Ambrx Third Party License Agreements are the only agreements (including any licenses), written or oral, granting any licenses or other rights to Ambrx (or any of its Affiliates) relating to the Ambrx Know-How
or Ambrx Patent Rights; 

  

	 	(h)	 with respect to each Ambrx Third Party License Agreement [***], (i) it is in full
force and effect; (ii) Ambrx is not in breach; (iii) Ambrx has not received any notice of breach or notice of threatened breach; and (iv) Ambrx has not received any notice from the counterparty to such Ambrx Third Party License
Agreement [***]) of intent to reduce the scope of the field or the licenses thereunder or render any of the licenses thereunder non-exclusive, and no event, act or omission has occurred which would reasonably be expected to give rise to the right of
the 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
40 - 

	 	
counterparty to such Ambrx Third Party License Agreement [***] to reduce the scope of the field or the licenses thereunder or render any of
the licenses thereunder non-exclusive; 

  

	 	(i)	Ambrx has disclosed to Merck all reasonably relevant information regarding (i) the Selected Target, and, to the best of Ambrx’s knowledge, relating to the Compounds or Products for use against such
Selected Target, and/or (ii) the Ambrx Patent Rights and Ambrx Know-How licensed under this Agreement; 

  

	 	(j)	Ambrx has disclosed to Merck the existence of any patent opinions related to the Ambrx Patent Rights and/or Ambrx Know-How licensed under this Agreement; 

 

	 	(k)	Ambrx has obtained all necessary consents, approvals and authorizations of all governmental authorities and other Persons required to be obtained by it in connection with the execution, delivery and performance
of this Agreement; 

  

	 	(l)	Ambrx has not obtained, or filed for, any INDs, NDAs or Marketing Authorizations for any Compounds or Products (or other polypeptide drug conjugates) for use against the Selected Target; 

 

	 	(m)	Ambrx has disclosed all material information and data and all material correspondences to/from any Regulatory Authority controlled by Ambrx (or any of its Affiliates) or to which it (or any of its Affiliates) has
access, in each case related to (i) the Research Program regardless of whether such data and information would have a positive, negative or neutral impact on the potential commercial, scientific or strategic value or attractiveness of the
Research Program or (ii) the Selected Target (or to the best of Ambrx’s knowledge, Compounds or Products for use against the Selected Target) regardless of whether such data and information would have a positive, negative or neutral impact
on the potential commercial, scientific or strategic value or attractiveness of the Selected Target (or such Compounds or Products); 

  

	 	(n)	Ambrx has not employed or otherwise used in any capacity the services of any Person debarred under United States law, including to Section 21 USC 335a, with respect to the Compounds or Products for use
against the Selected Target; and 

  

	 	(o)	The Ambrx Patent Rights and the Ambrx Know-How constitutes all intellectual property owned or otherwise controlled (through license or otherwise) by Ambrx (or any of its Affiliates) that are related to any Linker
Technology or are otherwise reasonably necessary or useful to perform the Research Program. 

  

	 	6.2.2	As of An Option Exercise Date. Ambrx represents and warrants to Merck that as of an applicable Option Exercise Date, solely with respect to the applicable Selected Target (including the Compounds and
Products related thereto): 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
41 - 

	 	(a)	to the best of Ambrx’s knowledge, the Ambrx Patent Rights and Ambrx Know-How exist and are not invalid or unenforceable, in whole or in part; 

 

	 	(b)	it has the full right, power and authority, including the full right, power and authority under the Ambrx Third Party License Agreements, to grant the licenses granted under Article 3 hereof; 

 

	 	(c)	it (and its Affiliates) has not previously (i) assigned, transferred, conveyed or otherwise encumbered its right, title and/or interest in Ambrx Patent Rights or Ambrx Know-How, or (ii) granted any
rights to any Third Parties, in either case that would conflict with the rights granted to Merck hereunder; 

  

	 	(d)	to the best of Ambrx’s knowledge, it is the sole and exclusive owner or sole and exclusive licensee (pursuant to the Ambrx Third Party License Agreements, as applicable) of the Ambrx Patent Rights and Ambrx
Know-How, all of which are (and shall be) free and clear of any liens, charges and encumbrances, other than such liens, charges or encumbrances that would not conflict with the rights granted to Merck hereunder, and no other person, corporate or
other private entity, or governmental entity or subdivision thereof, has or shall have any claim of ownership whatsoever with respect to the Ambrx Patent Rights and/or Ambrx Know-How except pursuant to the Ambrx Third Party License Agreements;

  

	 	(e)	to the best of Ambrx’s knowledge, the exercise of the license granted to Merck under the Ambrx Patent Rights and Ambrx Know-How, including the research, development, manufacture, use, sale, export and import
of Compounds and Products, do not interfere with or infringe any intellectual property rights owned or possessed by any Third Party; 

  

	 	(f)	there are no claims, judgments or settlements against or owed by Ambrx (or any of its Affiliates) and, to the best of Ambrx’s knowledge, no pending or threatened claims or litigation relating to the Ambrx
Patent Rights and/or Ambrx Know-How or Compounds or Products; 

  

	 	(g)	the Ambrx Third Party License Agreements are the only agreements (including any licenses), written or oral, granting any licenses or other rights to Ambrx (or any of its Affiliates) relating to the Compounds or
Products; 

  

	 	(h)	with respect to each Ambrx Third Party License Agreement, (i) it is in full force and effect; (ii) Ambrx is not in breach; (iii) Ambrx has not received any notice of breach or notice of threatened
breach; and (iv) Ambrx has not received any notice from the counterparty to such Ambrx Third Party License Agreement of intent to reduce the scope of the field or the licenses thereunder or render any of the license thereunder non-exclusive,
and no event, act or omission has occurred which would reasonably be expected to give rise to the right of the counterparty to such Ambrx Third Party License Agreement to reduce the scope of the field or the licenses thereunder or render any of the
licenses thereunder non-exclusive; 

  
 - 42 - 

	 	(i)	Ambrx has disclosed to Merck all reasonably relevant information regarding Compounds or Products, including any safety or efficacy information related to such Compounds or Products; 

 

	 	(j)	Ambrx has not obtained, or filed for, any INDs, NDAs or Marketing Authorizations for any Compounds or Products (or other polypeptide drug conjugates) for use against the Selected Target; 

 

	 	(k)	Ambrx has disclosed all material information and data and all material correspondences to/from any Regulatory Authority, in each case, controlled by Ambrx (or any of its Affiliates) or to which it (or any of its
Affiliates) has access, related to Compounds or Products regardless of whether such data and information would have a positive, negative or neutral impact on the potential commercial, scientific or strategic value or attractiveness of such Compounds
or Products, as applicable; 

  

	 	(l)	Ambrx has not employed or otherwise used in any capacity the services of any Person debarred under United States law, including to Section 21 USC 335a, with respect to the Compounds Discovered under the
applicable Research Program or otherwise in performing any portion of the Research Program; and 

  

	 	(m)	The Ambrx Patent Rights and the Ambrx Know-How constitutes all intellectual property owned or otherwise controlled (through license or otherwise) by Ambrx (or any of its Affiliates) that are reasonably necessary
or useful to research, develop, manufacture, sell or use the Compounds and/or Products. 

  

	 	6.3	Ambrx Further Representations, Warranties and Covenants 

  

	 	6.3.1	 Ambrx Third Party License Agreements and [***]. Ambrx represents and warrants to Merck that it has provided to Merck in writing prior to
the Effective Date a true, correct and complete copy of each of the Ambrx Third Party License Agreements [***], and each such copy includes any and all amendments, restatements, side letters, or other modifications thereto, as each such Ambrx Third
Party License Agreement [***] is in effect as of the Effective Date. Ambrx further covenants and agrees that during the Term of this Agreement, (a) it will satisfy all of its material obligations (including all payment obligations) under, and take
all steps necessary to maintain in full force and effect, each of the Ambrx Third Party License Agreements [***], including taking all steps to ensure that all licenses granted thereunder remain in full force and effect (on an exclusive basis) and
that the scope of such licenses (including with respect to all licensed intellectual property (including all Patent Rights) and all fields) are not reduced or limited in any manner that would adversely affect Merck’s rights under this
Agreement; (b) it will not assign (except an assignment to a party to which this 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
43 - 

	 	
Agreement has been assigned as permitted under Section 10.2), amend, restate, amend and restate, terminate in whole or in part, or otherwise modify any of the Ambrx Third Party
License Agreements [***] in any manner that would adversely affect Merck’s rights or obligations hereunder without the prior written consent of Merck; and (c) it will provide Merck with prompt notice of any claim of a material breach under any
of the Ambrx Third Party License Agreements [***] or notice of termination of any of the Ambrx Third Party License Agreements [***], made by either Ambrx or the counterparty to such Ambrx Third Party License Agreement [***] (or any party acting on
behalf of such counterparty) which would reasonably be expected to have an adverse effect on Merck’s rights or obligations hereunder. For the purposes of clarity, Ambrx (and not Merck) shall be responsible for all of the financial and other
obligations of Ambrx (and/or any of its Affiliates) to the counterparty under any of the Ambrx Third Party License Agreements [***], including any and all financial obligations to such counterparty with respect to Net Sales of Merck and its Related
Parties. 

  

	 	6.4	Disclaimer 

 EACH PARTY HEREBY DISCLAIMS ANY AND ALL REPRESENTATIONS AND
WARRANTIES IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED HEREIN NOT EXPRESSLY MADE IN THIS AGREEMENT TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAWS, INCLUDING WITH RESPECT TO THE COMPOUNDS, PRODUCTS, OR ANY TECHNOLOGY OR OTHER INTELLECTUAL
PROPERTY LICENSED OR GRANTED UNDER THIS AGREEMENT, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE. FOR THE AVOIDANCE OF DOUBT, NOTHING CONTAINED IN THIS SECTION 6.4 SHALL
OPERATE TO LIMIT OR INVALIDATE ANY EXPRESS WARRANTY CONTAINED HEREIN OR ANY IMPLIED WARRANTY OF GOOD FAITH AND/OR FAIR DEALING. 
 ARTICLE
7 
 PATENT PROVISIONS 
  

	 	7.1	Filing, Prosecution and Maintenance of Patents for Collaboration Information and Inventions 

  

	 	7.1.1	[***] 

  

	 	7.1.2	[***] 

  

	 	7.1.3	[***] 

  

	 	7.1.4	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
44 - 

	 	7.1.5	[***] 

  

	 	7.1.6	[***] 

  

	 	7.2	[***] 

  

	 	7.2.1	[***] 

  

	 	7.2.2	[***] 

  

	 	7.2.3	[***] 

  

	 	7.3	[***] 

  

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***] 

  

	 	(d)	[***] 

  

	 	(e)	[***] 

  

	 	7.4	[***] 

  

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***] 

  

	 	(d)	[***] 

  

	 	(i)	[***] 

  

	 	(ii)	[***] 

  

	 	(iii)	[***] 

  

	 	(e)	[***] 

  

	 	(f)	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
45 - 

	 	7.5	[***] 

 [***] 

ARTICLE 8 
 TERM AND
TERMINATION 
  

	 	8.1	Term and Expiration 

 This Agreement shall be effective as of the Effective Date
and unless terminated earlier pursuant to Sections 8.2 or 8.3 below, this Agreement shall continue in full force and effect on a Product-by-Product and country-by-country basis until expiration of all Merck royalty obligations hereunder with respect
to such Product in such country. The period from the Effective Date until the date of expiration or earlier termination of this Agreement in its entirety, or as the case may be, until the date of the expiration or earlier termination of this
Agreement in part with respect to a given Product on a country-by-country basis, shall be referred to herein as the “Term”. 

 

	 	8.2	Termination by Merck 

 Merck shall have the right to terminate this Agreement
[***]. Any termination under this Section 8.2 shall be accomplished by Merck giving ninety (90) days’ advance written notice to Ambrx (provided, however that Merck shall have the right to terminate this Agreement with respect to a
given Product immediately upon written notice to Ambrx in the event that Merck has a safety or efficacy concern with respect to such Product (a “Safety/Efficacy Termination”)). [***]. 

 

	 	8.3	Termination for Cause 

  

	 	8.3.1	Cause for Termination. This Agreement may be terminated at any time during the Term: 

  

	 	(a)	 upon written notice by either Party if the other Party is in breach of its material obligations hereunder, and has not cured such breach within
[***] days after notice requesting cure of the breach; provided, however, that in the event of a good faith dispute with respect to the existence of a material breach, the [***] day cure period shall be tolled until such time as the dispute is
resolved pursuant to Section 10.6 hereof; provided further, however, that notwithstanding the foregoing, it is agreed that termination pursuant to this Section 8.3.1(a) shall be on a Product-by-Product and country-by-country basis to which the material breach relates, as applicable, and that the non-breaching Party cannot terminate this Agreement
under this Section 8.3.1(a) with respect to non-affected Products and non-affected countries (and the effects of termination as set forth in Section 8.4 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
46 - 

	 	
shall only apply with respect to such terminated Product and such terminated country, as applicable); or 

  

	 	(b)	upon written notice by Merck if Ambrx materially fails to conduct a given Research Program in accordance with the terms of this Agreement (including with respect to a failure to comply with its diligence
obligations under Section 2.2) or otherwise materially breaches any of its obligations with respect to a given Research Program, and Ambrx has not cured such breach within [***] days after
notice requesting cure of the breach; provided, however, that notwithstanding the foregoing, it is agreed that termination pursuant to this Section 8.3.1(b) shall be on a Research Program-by-Research Program basis to which the breach relates,
as applicable, and Merck cannot terminate this agreement under this Section 8.3.1(b) with respect to the non-affected Research Programs (and the effects of termination as set forth in Section 8.4 shall only apply with respect to such
terminated Research Program) (provided that for clarity, the provisions of this Section 8.3.1(b) shall be without limitation to any rights of Merck under Section 8.3.1(a)); or 

 

	 	(c)	by either Party upon the filing or institution of bankruptcy, reorganization, liquidation or receivership proceedings, or upon an assignment of a substantial portion of the assets for the benefit of creditors by
the other Party; provided, however, that in the case of any involuntary bankruptcy proceeding such right to terminate shall only become effective if the Party consents to the involuntary bankruptcy or such proceeding is not dismissed within [***]
days after the filing thereof; or 

  

	 	(d)	immediately upon written notice by either Party if the Research Program has terminated in its entirety and Merck has not exercised any of its Options within the time periods set forth in Section 3.6.

  

	 	8.4	Effect of Termination 

  

	 	(a)	[***] 

  

	 	(b)	[***] 

  

	 	(c)	[***] 

  

	 	(d)	[***] 

  

	 	(e)	[***] 

  

	 	(f)	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
47 - 

	 	(g)	[***] 

  

	 	(h)	[***] 

  

	 	(i)	[***] 

  

	 	(ii)	[***] 

  

	 	(i)	[***]. 

  

	 	8.5	Effect of Expiration or Termination; Survival 

  

	 	(a)	Upon expiration of the Term, (i) Merck’s licenses pursuant to Sections 3.1.1(d) and 3.1.1(e) with respect to any Compounds and Products as to which the applicable Option has been exercised (if any)
shall become fully paid-up, perpetual, irrevocable licenses and (ii) Ambrx’s license pursuant to Section 3.1.2(b) shall survive such expiration with respect to any Reversion Compounds (if any,
as of the date of such expiration) and Reversion Products (if any, as of the date of such expiration) (subject to the payment obligations of Ambrx as set forth in Section 5.10 and subject to the provisions of Section 3.1.2(b)).

  

	 	(b)	Expiration or termination of this Agreement shall not relieve the Parties of any obligation accruing prior to such expiration or termination. Each Party shall pay all amounts then due and owing as of the
expiration or termination date (and Ambrx shall reimburse Merck for any uncredited fees paid by Merck pursuant to the Research Program). Any expiration or termination of this Agreement shall be without prejudice to the rights of either Party against
the other accrued or accruing under this Agreement prior to expiration or termination, including the obligation to pay royalties for Product(s) or Compound sold prior to such expiration or termination. 

 

	 	(c)	The provisions of Article 4 shall survive the expiration or termination of this Agreement and shall continue in effect for [***]. In addition, the provisions
of Articles 1 (as necessary for the interpretation of other surviving provisions), 7 and 10, and Sections 2.6.1, 2.6.4, 2.7, 2.9 (other than the first sentence thereof), 2.12.5, 3.1.1(g), 3.1.2(b), 3.1.2(c), 3.7.2, 5.2.2, 5.7, 5.10, 6.4, 8.4, 9.1
through 9.4, and this 8.5 shall survive any expiration or termination of this Agreement. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
48 - 

 ARTICLE 9 

INDEMNIFICATION; LIMITATION ON LIABILITY 
  

	 	9.1	Indemnification by Merck 

 Merck hereby agrees to indemnify, hold harmless and
defend Ambrx, its Affiliates and their respective officers, directors, agents, employees, successors and assigns (collectively, the “Ambrx Indemnified Parties”) against any and all losses, costs, expenses, fees or damages arising
out of or relating to claims, allegations, suits, actions or proceedings asserted by any Third Party, whether governmental or private, arising out of or relating to (i) the research, development, manufacture, use, sale or other disposition of
Compounds and Products by Merck or its Affiliates or sublicensees under this Agreement, (ii) the breach of any of Merck’s covenants, representations or warranties under this Agreement, or (iii) the negligence or willful misconduct by
Merck, its Affiliates or their respective officers, directors, agents or employees, in performing any obligations under this Agreement; provided, however, that Merck shall not be required to indemnify, hold harmless or defend any Ambrx Indemnified
Party against any claim to the extent that Ambrx has an obligation to indemnify the Merck Indemnified Parties under clauses (iii) or (iv) of Section 9.2. 
  

	 	9.2	Indemnification by Ambrx 

 Ambrx agrees to indemnify, hold harmless and defend
Merck, its Affiliates and their respective officers, directors, agents, employees, successors and assigns (collectively, the “Merck Indemnified Parties”) against any and all losses, costs, expenses, fees or damages arising out of or
relating to claims, allegations, suits, actions or proceedings asserted by any Third Party, whether governmental or private, arising out of or relating to (i) the research, development, manufacture, use, sale or other disposition of Reversion
Compounds and/or Reversion Products by Ambrx or its Affiliates or sublicensees, (ii) the research, development, manufacture or use of Compounds and/or Products by Ambrx or its Affiliates or sublicensees under this Agreement, (iii) the
breach of any of Ambrx’s covenants, representations or warranties under this Agreement, or (iv) the negligence or willful misconduct by Ambrx, its Affiliates or their respective officers, directors, agents or employees, in performing any
obligations under this Agreement; provided, however, that Ambrx shall not be required to indemnify, hold harmless or defend any Merck Indemnified Party against any claim to the extent that Merck has an obligation to indemnify the Ambrx Indemnified
Parties under clauses (ii) or (iii) of Section 9.1. 
  

	 	9.3	Procedure 

 If either Party is seeking indemnification under Section 9.1 or
9.2 (the “Indemnified Party”), it shall inform the other Party (the “Indemnifying Party”) of the claim giving rise to the obligation to indemnify pursuant to such Section as soon as reasonably practicable after
receiving notice of the claim (provided, however, any delay or failure to provide such notice shall not constitute a waiver or release of, or otherwise limit, the Indemnified Party’s rights to indemnification under, as applicable,
Section 9.1 or 9.2, except to the extent that such delay or failure materially prejudices the Indemnifying 

  
 - 49 - 

 
Party’s ability to defend against the relevant claims). The Indemnifying Party shall have the right to assume the defense of any such claim for which it is obligated to indemnify the
Indemnified Party. The Indemnified Party shall cooperate with the Indemnifying Party and the Indemnifying Party’s insurer as the Indemnifying Party may reasonably request, and at the Indemnifying Party’s cost and expense. The Indemnified
Party shall have the right to participate, at its own expense and with counsel of its choice, in the defense of any claim or suit that has been assumed by the Indemnifying Party. The Indemnifying Party shall not settle any claim without the prior
written consent of the Indemnified Party, not to be unreasonably withheld. The Indemnified Party shall not settle or compromise any such claim without the prior written consent of the Indemnifying Party, which it may provide in its sole discretion.
If the Parties cannot agree as to the application of Section 9.1 or 9.2 to any claim, pending resolution of the dispute pursuant to Section 10.6, the Parties may conduct separate defenses of such claims, with each Party retaining the right
to claim indemnification from the other Party in accordance with Section 9.1 or 9.2 upon resolution of the underlying claim. 
  

	 	9.4	Limitation of Liability 

 NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY SPECIAL,
CONSEQUENTIAL, INCIDENTAL, PUNITIVE, OR INDIRECT DAMAGES (INCLUDING LOST PROFITS) ARISING FROM OR RELATING TO THIS AGREEMENT (INCLUDING BREACH OF THIS AGREEMENT) OR THE EXERCISE OF ITS RIGHTS HEREUNDER, REGARDLESS OF ANY NOTICE OF THE POSSIBILITY OF
SUCH DAMAGES. NOTWITHSTANDING THE FOREGOING, NOTHING IN THIS SECTION 9.4 IS INTENDED TO OR SHALL LIMIT OR RESTRICT (1) THE INDEMNIFICATION RIGHTS OR OBLIGATIONS OF ANY PARTY UNDER SECTION 9.1 OR 9.2, OR (2) DAMAGES AVAILABLE FOR A
PARTY’S BREACH OF ITS CONFIDENTIALITY OBLIGATIONS UNDER Article 4. 
  

	 	9.5	Insurance 

 Each Party shall procure and maintain insurance, including product
liability insurance (or self-insure), adequate to cover its obligations hereunder and which is consistent with normal business practices of prudent companies similarly situated at all times during which any Product or Reversion Product, as
applicable, is being clinically tested with human subjects or commercially distributed or sold by such Party. It is understood that such insurance shall not be construed to create a limit of either Party’s liability with respect to its
indemnification obligations under this Article 9 or otherwise. Each Party shall provide the other Party with written evidence of such insurance upon request. Each Party shall provide the other Party with written notice at least thirty (30) days
prior to the cancellation, non renewal or material change in such insurance or self insurance which materially adversely affects the rights of the other Party hereunder. 

  
 - 50 - 

 ARTICLE 10 

MISCELLANEOUS 
  

	 	10.1	Force Majeure 

 Neither Party shall be held liable to the other Party nor be
deemed to have defaulted under or breached this Agreement for failure or delay in performing any obligation under this Agreement to the extent that such failure or delay is caused by or results from causes beyond the reasonable control of the
affected Party, potentially including, embargoes, war, acts of war (whether war be declared or not), acts of terrorism, insurrections, riots, civil commotions, strikes, lockouts or other labor disturbances, fire, floods, or other acts of God, or
acts, omissions or delays in acting by any governmental authority or the other Party. The affected Party shall notify the other Party of such force majeure circumstances as soon as reasonably practical, and shall promptly undertake all reasonable
efforts necessary to cure such force majeure circumstances. 
  

	 	10.2	Assignment/Change of Control 

 Except as provided in this Section 10.2, this
Agreement may not be assigned or otherwise transferred, nor may any right or obligation hereunder be assigned or transferred, by either Party without the consent of the other Party. [***]. 

 

	 	10.3	Severability 

 If any one or more of the provisions contained in this Agreement is
held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby, unless the absence of the invalidated provision(s)
adversely affects the substantive rights of the Parties. The Parties shall in such an instance use their good faith efforts to replace the invalid, illegal or unenforceable provision(s) with valid, legal and enforceable provision(s) which, insofar
as practical, implement the purposes of this Agreement. 
  

	 	10.4	Notices 

 All notices which are required or permitted hereunder shall be in
writing and sufficient if delivered personally, sent by facsimile (and promptly confirmed by personal delivery, registered or certified mail or overnight courier), sent by nationally-recognized overnight courier or sent by registered or certified
mail, postage prepaid, return receipt requested, addressed as follows: 
  

			
	If to Ambrx, to:	 	Ambrx, Inc.
		 	10975 North Torrey Pines Road
		 	La Jolla, CA 92037
		 	Attn: Office of General Counsel

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
51 - 

			
		 	Facsimile No.: (858) 453-9511
		
	With a copy to:	 	Latham & Watkins, LLP
		 	12636 High Bluff Drive, Suite 400
		 	San Diego, CA 92130
		 	Attention: Faye H. Russell, Esq.
		 	Facsimile No.: (858) 523-5450
		
	If to Merck, to:	 	[***]
		 	[***]
		 	[***]
		 	[***]
		 	[***]
		 	[***]
		
		 	[***]
		 	[***]
		 	[***]
		 	[***]
		 	[***]
		 	[***]
		 	[***]

 or to such other address(es) as the Party to whom notice is to be given may have furnished to the other Party
in writing in accordance herewith. Any such notice shall be deemed to have been given: (a) when delivered, if personally delivered or sent by facsimile on a business day (or if delivered or sent on a non-business day, then on the next business
day); (b) on the business day after dispatch, if sent by nationally-recognized overnight courier; or (c) on the fifth (5th) business day following the date of mailing, if sent by mail. 

 

	 	10.5	Applicable Law 

 This Agreement shall be governed by and construed in accordance
with the laws of the [***] and the patent laws of the United States, without reference to any rules of conflict of laws or renvoi. 
  

	 	10.6	Dispute Resolution 

  

	 	10.6.1	 The Parties shall negotiate in good faith and use reasonable efforts to settle any dispute, controversy or claim arising from or related to
this Agreement or the 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
52 - 

	 	
breach thereof. If the Parties do not fully settle, and a Party wishes to pursue the matter, each such dispute, controversy or claim that is not an “Excluded Claim” shall be finally
resolved by binding arbitration in accordance with the Commercial Arbitration Rules and Supplementary Procedures for Large Complex Disputes of the American Arbitration Association (“AAA”), and judgment on the arbitration award may
be entered in any court having jurisdiction thereof. 

  

	 	10.6.2	The arbitration shall be conducted by a panel of three persons experienced in the pharmaceutical business: within thirty (30) days after initiation of arbitration, each Party shall select one person to act
as arbitrator; and the two Party-selected arbitrators shall select a third arbitrator within thirty (30) days of their appointment. If the arbitrators selected by the Parties are unable or fail to agree upon the third arbitrator, the third
arbitrator shall be appointed by the AAA. The place of arbitration shall be New York, New York, and all proceedings and communications shall be in English. 

  

	 	10.6.3	Either Party may apply to the arbitrators for interim injunctive relief until the arbitration award is rendered or the controversy is otherwise resolved. Either Party also may, without waiving any remedy under
this Agreement, seek from any court having jurisdiction any injunctive or provisional relief necessary to protect the rights or property of that Party pending the arbitration award. The arbitrators shall have no authority to award punitive or any
other type of damages not measured by a Party’s compensatory damages. Each Party shall bear its own costs and expenses and attorneys’ fees and an equal share of the arbitrators’ fees and any administrative fees of arbitration.

  

	 	10.6.4	Except to the extent necessary to confirm an award or as may be required by Applicable Law, neither a Party nor an arbitrator may disclose the existence, content, or results of an arbitration without the prior
written consent of both Parties. In no event shall an arbitration be initiated after the date when commencement of a legal or equitable proceeding based on the dispute, controversy or claim would be barred by the applicable New York statute of
limitations. 

  

	 	10.6.5	The Parties agree that, in the event of a good faith dispute over the nature or quality of performance under this Agreement, neither Party may terminate this Agreement until final resolution of the dispute
through arbitration or other judicial determination. The Parties further agree that any payments made pursuant to this Agreement pending resolution of the dispute shall be refunded if an arbitrator or court determines that such payments are not due.

  

	 	10.6.6	As used in this Section, the term “Excluded Claim” shall mean a dispute, controversy or claim that concerns (a) the validity or infringement of a patent, trademark or copyright; or
(b) any antitrust, anti-monopoly or competition law or regulation, whether or not statutory. 

  

	 	10.7	Entire Agreement; Amendments 

  
 - 53 - 

 This Agreement together with the Schedules hereto contains the entire understanding of the
Parties with respect to the subject matter hereof, including the Research Program and the licenses granted hereunder. Any other express or implied agreements and understandings, negotiations, writings and commitments, either oral or written, with
regard to the subject matter hereof, including the Research Program and/or the licenses granted hereunder, are superseded by the terms of this Agreement. The Schedules to this Agreement are incorporated herein by reference and shall be deemed a part
of this Agreement. This Agreement may be amended, or any term hereof modified, only by a written instrument duly executed by authorized representatives of both Parties hereto. 
  

	 	10.8	Headings and Interpretation 

 The captions to the several Articles and Sections
and subsections hereof are not a part of this Agreement, but are merely for convenience to assist in locating and reading the several Articles and Sections hereof. Any reference in this Agreement to an Article, Section, subsection, paragraph,
clause, or Schedule or Exhibit shall be deemed to be a reference to an Article, Section, subsection, paragraph, clause, or Schedule or Exhibit, of or to, as the case may be, this Agreement, unless otherwise indicated. Unless the context of this
Agreement otherwise requires, (a) words of any gender include each other gender, (b) words such as “herein”, “hereof”, and “hereunder” refer to this Agreement as a whole and not merely to the particular
provision in which such words appear, (c) words using the singular shall include the plural, and vice versa, (d) whenever any provision of this Agreement uses the term “including” (or “includes” or words of similar
import), such term shall not be limiting and such term shall be deemed to mean “including without limitation” (or “includes without limitation”), (e) the word “or” shall not be construed as exclusive, and
(f) references to any Articles or Sections include Sections and subsections that are part of the reference Article or section (e.g., a section numbered “Section 2.2.1” would be part of “Section 2.2.”, and references to
“Article 2” or “Section 2.2.” would refer to material contained in the subsection described as “Section 2.2.2”). 
  

	 	10.9	Independent Contractors 

 It is expressly agreed that Ambrx and Merck shall be
independent contractors and that the relationship between the Parties shall not constitute a partnership, joint venture or agency. Neither Ambrx nor Merck shall have the authority to make any statements, representations or commitments of any kind,
or to take any action, which shall be binding on the other Party, without the prior written consent of the other Party. 

  
 - 54 - 

	 	10.10	Waiver 

 The waiver by either Party hereto of any right hereunder, or of any
failure of the other Party to perform, or of any breach by the other Party, shall not be deemed a waiver of any other right hereunder or of any other breach by or failure of such other Party, whether of a similar nature or otherwise. 

 

	 	10.11	Cumulative Remedies 

 No remedy referred to in this Agreement is intended to be
exclusive, but each shall be cumulative and in addition to any other remedy referred to in this Agreement or otherwise available under law. 
  

	 	10.12	Waiver of Rule of Construction 

 Each Party has had the opportunity to consult
with counsel in connection with the review, drafting and negotiation of this Agreement. Accordingly, the rule of construction that any ambiguity in this Agreement shall be construed against the drafting Party shall not apply. 

 

	 	10.13	Business Day Requirements 

 In the event that any notice or other action or
omission is required to be taken by a Party under this Agreement on a day that is not a business day then such notice or other action or omission shall be deemed to be required to be taken on the next occurring business day. 

 

	 	10.14	Counterparts 

 This Agreement may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute one and the same instrument. For purposes hereof, a scanned copy of this Agreement, including the signature pages hereto, will be deemed to be an original. 

 

	 	10.15	Further Actions 

 Each Party will execute, acknowledge and deliver such further
instruments, and to do all such other ministerial, administrative or similar acts, as may be necessary or appropriate in order to carry out the purposes and intent of this Agreement. 

 

	 	10.16	No Third Party Rights 

 The provisions of this Agreement are for the exclusive
benefit of the Parties, and no other person or entity shall have any right or claim against any Party by reason of these provisions or be entitled to enforce any of these provisions against any Party. 

  
 - 55 - 

	 	10.17	Expenses 

 Except as otherwise specifically provided in this Agreement, each Party
(and its Affiliates) shall bear its own costs and expenses in connection with entering into this Agreement and the consummation of the transactions and performance of its obligations contemplated hereby. 

 

	 	10.18	Extension to Affiliates 

 Merck shall have the right to extend the rights,
licenses, immunities and obligations granted in this Agreement to one or more of its Affiliates. All applicable terms and provisions of this Agreement shall apply to any such Affiliate to which this Agreement has been extended to the same extent as
such terms and provisions apply to Merck. Merck shall remain fully liable for any acts or omissions of such Affiliates. 
 [Remainder of
this page is left intentionally blank] 

  
 - 56 - 

 

 
  

 IN WITNESS WHEREOF, the Parties have executed this Research Collaboration, Option and
Exclusive License Agreement as of the date first set forth above. 
  

					
		 	MERCK SHARP & DOHME CORP.
			
		 	By:	 	 /s/ Barbara Yanni

		 	Name:	 	Barbara Yanni
		 	Title:	 	Vice President and Chief Licensing Officer
		
		 	AMBRX, INC.
			
		 	By:	 	 /s/ John D. Diekman

		 	Name:	 	John D. Diekman
		 	Title:	 	Chairman of the Board

 SIGNATURE PAGE TO RESEARCH COLLABORATION, 

OPTION AND EXCLUSIVE LICENSE AGREEMENT 

 

 
  

 SCHEDULE 1.72 

RESEARCH PLAN 1 
 [See
Attached] 
  

 RESEARCH PLAN 1 

[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 2
- 

 SCHEDULE 1.90 

TARGET 1 
 [***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 3
- 

 SCHEDULE 2.1.1 

EXCLUDED TARGETS 
 [***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 4
-EX-10.17

 Exhibit 10.17 

Execution Version 
 CERTAIN
MATERIAL (INDICATED BY AN ASTERISK) HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT. THE OMITTED MATERIAL HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. 

RESEARCH COLLABORATION 

AND EXCLUSIVE LICENSE AGREEMENT 

by and between 

AGENSYS, INC. 
 and

 AMBRX, INC. 

 RESEARCH COLLABORATION 

AND EXCLUSIVE LICENSE AGREEMENT 

THIS RESEARCH COLLABORATION AND EXCLUSIVE LICENSE AGREEMENT (this “Agreement”), effective as of April 1, 2013 (the
“Effective Date”), by and between AGENSYS, INC., a corporation organized and existing under the laws of the State of California (“Agensys”) and AMBRX, INC., a corporation organized and existing under the laws of the
State of Delaware (“Ambrx”). 
 RECITALS: 

WHEREAS, Ambrx has developed Ambrx Know-How (as hereinafter defined) and has rights to Ambrx Patent Rights (as hereinafter defined);

 WHEREAS, Agensys, together with its Affiliates (as hereinafter defined), is a biotechnology company engaged in research,
development, and commercialization of human therapeutic and diagnostic products. 
 WHEREAS, Agensys and Ambrx desire to enter into a
research collaboration to identify and optimize candidate Antibody Drug Conjugates (as hereinafter defined) which are developed against one or more of the Targets (as hereinafter defined), using, among other things Ambrx’s ReCODETM
Technology (as hereinafter defined) and/or EuCODETM Technology (as hereinafter defined), upon the terms and conditions set forth herein; and 

WHEREAS, Agensys desires to obtain a license under the Ambrx Patent Rights and Ambrx Know-How upon the terms and conditions set forth
herein, and Ambrx desires to grant such a license, in order to research, develop, make, have made, use, sell, offer for sale, export and import Compounds (as hereinafter defined) and Products (as hereinafter defined) for the diagnosis, prevention or
treatment of any and all human diseases and human conditions in the Territory (as hereinafter defined). 
 NOW, THEREFORE, in
consideration of the foregoing premises and the mutual covenants contained herein, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows: 

ARTICLE 1 
 DEFINITIONS

 Unless specifically set forth to the contrary herein, the following terms shall have the respective meanings set forth below: 

 

	 	1.1	“Act” shall mean, as applicable, the United States Federal Food, Drug and Cosmetic Act, 21 U.S.C. §§ 301 et seq., and/or the Public Health Service Act, 42 U.S.C. §§ 262
et seq., as such may be amended from time to time. 

  

	 	1.2	 “Active Selected Target” shall mean Targets which are the subject of the Research Program (“Research Stage Targets”)
and/or for which pre-clinical development of a 

	 	
Compound against such Target is continued beyond the achievement of the Research Milestone through the initiation of an IND-Enabling Pharmacology and Toxicology Study for such Target; provided
however, such Active Selected Targets may be replaced or new Active Selected Targets added pursuant to Section 2.1.3 such that a maximum of four (4) Targets are Research Stage Targets at any one time during the Research Term. As of the
Effective Date, the Active Selected Targets are Target 1, Target 2 and Target 3; following the Effective Date, the Active Selected Targets shall be determined as set forth in Section 2.1.3. For clarity, once a given Target becomes an Open
Terminated Target, it shall not longer be considered a “Target”, “Active Selected Target” or “Commercial Target” for purposes of this Agreement. In addition, once an IND-Enabling Pharmacology and Toxicology Study is
initiated for a Compound directed to an Active Selected Target, such Target shall thereafter be considered a “Commercial Target.” 

  

	 	1.3	“Affiliate” shall mean, with respect to any Person, any other Person that directly or indirectly controls, is controlled by, or is under common control with such Person. A Person shall be deemed to
control another Person if such Person possesses the power to direct or cause the direction of the management, business and policies of such Person, whether through the ownership of fifty percent (50%) or more of the voting securities of such
Person, by contract or otherwise. For clarity, the use of “Affiliate” in this Agreement shall exclude any Third Party that becomes an Affiliate of Ambrx after the Effective Date due to a Change of Control involving Ambrx and such Third
Party; and in all cases, all information and materials included within the rights licensed to Agensys hereunder prior to the time that such Change of Control occurs shall continue to be included in the licensed rights following such Change of
Control. 

  

	 	1.4	“Agensys” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.5	“Agensys Antibody(ies)” shall mean any Antibody(ies) Controlled by Agensys during the Term. 

  

	 	1.6	 “Agensys Background Know-How” shall mean all information and materials, including discoveries, improvements,
processes, methods, protocols, formulas, compositions of matter, data, inventions, know-how (including any Agensys Payload Technology and Agensys Antibody(ies)) and/or trade secrets, patentable or otherwise, which (i) are Controlled by Agensys
or any of its Affiliates as of the Effective Date or during the Research Term, (ii) are not generally known or available and (iii) Agensys chooses to make available for use in connection with the performance of activities under the
Research Program. Notwithstanding the foregoing, Agensys Background Know-How shall exclude (x) the Agensys Collaboration Information and Inventions and (y) Agensys’ rights in Joint Collaboration Information and Inventions. For the
avoidance of doubt, an Agensys Antibody which has undergone a EuCODE Modification and/or a ReCODE Modification under the Research Plan will be deemed an Improvement to Agensys Background Technology but any such Agensys Antibody which is

  
 - 2 - 

	 	
incorporated in a Compound shall be subject to the terms and conditions of this Agreement. 

  

	 	1.7	“Agensys Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed, invented, reduced to
practice and/or otherwise made under the Research Program solely by employees of Agensys (or any of its Affiliates) or other persons (not employed by Ambrx (or any of its Affiliates)) acting on behalf of Agensys (or any of its Affiliates).

  

	 	1.8	“Agensys Know-How” shall mean the Agensys Background Know-How, the Agensys Collaboration Information and Inventions and Agensys’ rights in Joint Collaboration Information and Inventions.

  

	 	1.9	“Agensys Patent Rights” shall mean any and all Patent Rights in the Territory which are Controlled by Agensys or any of its Affiliates and (i) which claim or cover Agensys Know-How or
(ii) claim or cover the research, development, manufacture, marketing, use or sale of any Compound and/or Product. 

  

	 	1.10	“Agensys Payload Technology” shall mean all Payload Technology owned or Controlled by Agensys as of the Effective Date or during the Research Term. 

 

	 	1.11	“Agensys Terminated Compound” shall mean any Compound (a) for which Agensys’ exclusive licenses under Ambrx intellectual property as set forth in Sections 3.1.1(d) and 3.1.1(e) are terminated
as a result of the termination of this Agreement in its entirety, termination of this Agreement on a Target-by-Target basis or Product-by-Product basis, as applicable, or replacement or abandonment of a Target pursuant to Section 2.14; and
(b) that contains Agensys Know-How and/or is covered by claims within Agensys Patent Rights. 

  

	 	1.12	“Agensys Terminated Target” shall mean (i) a Research Stage Target or an Active Selected Target which Agensys has replaced as set forth in Section 2.1.3 or with respect to which Agensys has
abandoned efforts under the Research Program or (ii) such Commercial Target to which a Compound or Product has Primary Activity and which Commercially Reasonable Efforts are no longer being applied by Agensys for such Compound or Product or the
First Commercial Sale has occurred but no royalties are being paid for such Product, in each of (i) and (ii) that is covered by one or more claims in the Agensys Patent Rights. 

 

	 	1.13	“Agreement” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.14	“Ambrx” shall have the meaning set forth in the introductory paragraph to this Agreement. 

  

	 	1.15	 “Ambrx Background Know-How” shall mean all information and materials, including discoveries, improvements, processes, methods,
protocols, formulas, compositions of 

  
 - 3 - 

	 	
matter, data, inventions, know-how (including any Ambrx Payload Technology) and/or trade secrets, patentable or otherwise, which (i) are Controlled by Ambrx as of the Effective Date or
during the Research Term, (ii) are not generally known or available and (iii) Ambrx chooses to make available for use by Agensys in connection with the performance of activities under the Research Program. For clarity, the Ambrx Background
Know-How shall include all know-how under the ReCODETM Technology and all know-how under the EuCODETM Technology. Notwithstanding the foregoing, “Ambrx Background Know-How” shall exclude (x) the Ambrx Collaboration Information
and Inventions and (y) Ambrx’s rights in Joint Collaboration Information and Inventions. 

  

	 	1.16	“Ambrx Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed,
invented, reduced to practice and/or otherwise made under the Research Program solely by employees of Ambrx (or any of its Affiliates) or other persons (not employed by Agensys (or any of its Affiliates)) acting on behalf of Ambrx (or any of its
Affiliates). 

  

	 	1.17	“Ambrx Know How” shall mean, the Ambrx Background Know-How, the Ambrx Collaboration Information and Inventions and Ambrx’s rights in Joint Collaboration Information and Inventions.

  

	 	1.18	“Ambrx Patent Rights” shall mean any and all Patent Rights in the Territory which are Controlled by Ambrx as of the Effective Date or during the Term and which (i) claim or cover the
research, development, manufacture, marketing, use or sale of any component of a Compound and/or Product (including any Ambrx Collaboration Information and Inventions or Ambrx’s rights in Joint Collaboration Information and Inventions);
(ii) claim or cover Ambrx Know-How (including any Ambrx Collaboration Information and Inventions or Ambrx’s rights in Joint Collaboration Information and Inventions); or (iii) claim or cover ReCODETM Modification or EuCODETM
Modification. 

  

	 	1.19	“Ambrx Payload Technology” shall mean all Payload Technology owned or Controlled by Ambrx as of the Effective Date or during the Research Term. 

 

	 	1.20	“Antibody(ies)” shall mean any antibody or protein comprising at least one (1) CDR (complementarity determining region) portion thereof (including bispecific antibodies, single chain
antibodies and domain antibodies) and/or similar binding protein, whether polyclonal, monoclonal, human, humanized, chimeric, murine, synthetic or from any other source. 

 

	 	1.21	“Antibody Drug Conjugate” or “ADC” shall mean an Antibody which has undergone a EuCODE Modification and/or a ReCODE Modification conjugated to Payload Technology.

  

	 	1.22	 “Applicable Laws” shall mean the applicable laws of any jurisdiction which are applicable to any of the Parties or their
respective Affiliates in carrying out activities 

  
 - 4 - 

	 	
hereunder or to which any of the Parties or their respective Affiliates in carrying out the activities hereunder is subject, and shall include all statutes, enactments, acts of legislature, laws,
ordinances, rules, regulations, notifications, guidelines, policies, directions, directives and orders of any statutory authority, tribunal, board, or court or any central or state government or local authority or other governmental entity in such
jurisdictions, including the Act. 

  

	 	1.23	“Back-up Compound(s)” shall mean those certain Antibody Drug Conjugates Discovered in performance of the Research Program with Primary Activity in the Field directed against the same
Target as the applicable Compound. 

  

	 	1.24	“Calendar Quarter” shall mean the respective periods of three (3) consecutive calendar months ending on March 31, June 30, September 30 and December 31.

  

	 	1.25	“Calendar Year” shall mean each successive period of twelve (12) months commencing on January 1 and ending on December 31. 

 

	 	1.26	“Cancer” shall mean a disease in humans primarily characterized by uncontrolled growth or spread of abnormal and anaplastic cells, metastases, neoplasm, malignant tumors and/or invasion by
abnormal and anaplastic cells into tissues. For the avoidance of doubt, “Cancer” shall not include inflammation, infection, transplantation, auto-immunity or conditions characterized by hypertrophy or hyperplasticity of normal cells.

  

	 	1.27	“Change of Control” shall mean with respect to a Person: (i) the sale of all or substantially all of such Person’s assets or business relating to the subject matter of this Agreement;
(ii) a merger, reorganization or consolidation involving such Person in which the voting securities of such Person outstanding immediately prior thereto cease to represent at least fifty percent (50%) of the combined voting power of the
surviving entity immediately after such merger, reorganization or consolidation; or (iii) a person or entity, or group of persons or entities, acting in concert acquire more than fifty percent (50%) of the voting equity securities or
management control of such Person (other than in connection with an arrangement principally for bona fide equity financing purposes of such Person in which the Person is the surviving corporation). 

 

	 	1.28	“Clinical Trial” shall mean a Phase I Clinical Trial, Phase II Clinical Trial, or Phase III Clinical Trial, as applicable. 

 

	 	1.29	“Collaboration Information and Inventions” shall mean any protocol, formula, data, know-how, information, trade secret, process, method, composition of matter (including composition of matter of
any Antibody Drug Conjugates), compound (including any Antibody Drug Conjugates), material, article of manufacture, discovery, invention or finding, patentable or otherwise, that is first conceived, discovered, developed, invented, reduced to
practice and/or otherwise made (as would be necessary to establish inventorship under United States patent law (regardless of where the applicable activities occurred)) in performance of the Research Program. For clarity, “Collaboration
Information and Inventions” shall exclude Patent Rights. 

  
 - 5 - 

	 	1.30	“Combination Product” shall mean a Product which includes one or more active ingredients other than a Compound in combination with a Compound. All references to Product in this Agreement shall be
deemed to include Combination Product. 

  

	 	1.31	“Commercial Target” shall mean up to five (5) Active Selected Targets, identified in writing by Agensys prior to filing of the first IND for a Product against such Active Selected Target,
for which (i) Agensys has progressed at least one (1) Compound related to such Target through IND-Enabling Pharmacology and Toxicology Studies or (ii) has at least one (1) Compound directed to such Target that is the subject of
ongoing Clinical Trials or is being commercialized (e.g., a First Commercial Sale has occurred and royalties are being paid under this Agreement). For clarity, once a given Target becomes a Commercial Target, it shall not longer be considered an
Active Selected Target. In addition, once a given Target becomes an Open Terminated Target, it shall not longer be considered a “Target”, “Active Selected Target” or “Commercial Target” for purposes of this Agreement.

  

	 	1.32	“Commercially Reasonable Efforts” shall mean, with respect to the efforts to be expended by a Party with respect to any objective, reasonable, diligent, good faith efforts to accomplish such
objective as such Party would normally use to accomplish a similar objective under similar circumstances, it being understood and agreed that with respect to the research, discovery, development or commercialization of any Product (or Compound, as
applicable) by either Party, such efforts shall be substantially equivalent to those efforts and resources commonly used by such Party for a product owned by it or to which it has rights, which product is at a similar stage in its development or
product life and is of similar market potential taking into account efficacy, safety, approved labeling, the competitiveness of alternative products in the marketplace, the patent and other proprietary position of the product, the likelihood of
regulatory approval, the profitability and commercial potential of the product to the applicable Party (including the amounts payable to licensors of patent or other intellectual property rights), alternative products and other relevant factors.
Commercially Reasonable Efforts shall be determined on a market-by-market and Product-by-Product basis, and it is anticipated that the level of effort will be different for different markets, and will change over time, reflecting changes in the
status of the Product (or Compound, as applicable) and the market(s) involved. 

  

	 	1.33	“Compound” shall mean (a) any and all Antibody Drug Conjugates Discovered in performance of the Research Program with Primary Activity directed against the applicable Active Selected Target
or Commercial Target; and (b) any Back-up Compounds for such Antibody Drug Conjugates. For clarity, once a given Compound becomes a Terminated Compound, it shall not longer be considered a “Compound” for purposes of this Agreement.

  

	 	1.34	 “Confidential Information” shall mean any and all proprietary and/or confidential information and data, including all
scientific, pre-clinical, clinical, regulatory, process, formulation, manufacturing, marketing, financial and commercial information or data, whether communicated in writing or orally or by any other method, which is provided

  
 - 6 - 

	 	
by one Party to the other Party prior to or in connection with this Agreement. The Parties acknowledge having entered into a Non-Disclosure Agreement as of 06-October-2010 and agree that upon the
Effective Date such Non-Disclosure Agreement shall be superseded by the Confidentiality / Non-Disclosure obligations of this Agreement. 

  

	 	1.35	“Control”, “Controls” or “Controlled by” shall mean with respect to any Patent Rights, know-how or other intellectual property assets or other items or rights,
as applicable, the possession of (whether by ownership or license or other right, other than pursuant to a license under this Agreement), or the ability of a Party to grant access to, or a license or sublicense of, such item or right as provided for
herein without violating the terms of any agreement or other arrangement with any Third Party existing at the time such Party would be required hereunder to grant the other Party such access or license or sublicense. 

 

	 	1.36	“Discover” shall mean, with respect to a given Antibody or Antibody Drug Conjugate, that such Antibody or Antibody Drug Conjugate was actually identified, made (and tested in a physical form),
developed, created, derived, discovered, characterized, selected or otherwise optimized in performance of the Research Program. 

  

	 	1.37	“EuCODETM Modification” shall mean the design, creation, modification and/or generation of compounds against a Target through the incorporation, substitution or addition of one or more
non-naturally encoded amino acids (i.e., amino acids other than the 20 naturally-encoded amino acids), including non-naturally encoded amino acids providing one or more points of site-specific attachment for a drug, into the amino acid sequence of
the Antibody comprising such compounds against a Target using EuCODETM Technology. 

  

	 	1.38	“EuCODETM Technology” shall mean Ambrx Patent Rights and Ambrx Know-How (i) necessary for performing EuCODETM Modification and/or (ii) directed to or necessary for expressing,
or chemically modifying, Compounds resulting from EuCODETM Modification. 

  

	 	1.39	“Field” shall mean the therapeutic use of a Compound and/or Product for the treatment of Cancer in humans. 

  

	 	1.40	“Filing” of an NDA (or IND, as applicable) shall mean the acceptance by a Regulatory Authority of an NDA (or IND, as applicable) for filing; provided that such Regulatory Authority has not issued
a refusal to file letter or a letter identifying deficiencies for which the Regulatory Authority will suspend its review following submission of the filing. 

  

	 	1.41	 “First Commercial Sale” shall mean, with respect to a given Product in a given country in the Territory, the first shipment to
a Third Party of commercial quantities of such Product sold in such country to a Third Party on arm’s length terms by Agensys (or its Affiliate or sub-licensee) for end use or consumption of such Product in such country in the Territory
(following, in all cases, receipt of Marketing Authorization for such 

  
 - 7 - 

	 	
Product in such country), excluding, however, any sale or other distribution for use in a Clinical Trial or for compassionate or similar use. For clarity, First Commercial Sale shall be
determined on a Product-by-Product and country-by-country basis. 

  

	 	1.42	“Full Time Equivalent” or “FTE” shall mean the equivalent of a full-time scientist’s work time over a Calendar Year consisting of a total of one thousand seven hundred and
sixty (1760) hours per Calendar Year of work devoted to, and directly related to, conducting activities under the Research Program in accordance with this Agreement. Any individual who devotes less than one thousand seven hundred and sixty
(1760) hours per Calendar Year to conducting activities under the Research Program shall be treated as an FTE on a pro-rata basis taking into account the actual number of hours worked on conducting activities under the Research Program divided
by one thousand seven hundred and sixty (1760) hours. No individual may be charged at greater than one (1) FTE in a given Calendar Year. 

  

	 	1.43	“FTE Rate” shall mean [***] per Calendar Year; provided that the “FTE Rate” shall be increased annually for each Calendar Year after 2013 (i.e., commencing with Calendar Year
2014) to be equal to (i) the FTE Rate for the previous Calendar Year multiplied by (ii) [***] (e.g., the FTE Rate for Calendar Year 2014 shall be [***] and the FTE Rate for Calendar Year 2015 shall be [***], and so on). 

 

	 	1.44	“GLP” or “Good Laboratory Practice” shall mean the applicable then-current standards for laboratory activities for pharmaceuticals or biologicals, as set forth in the Act, as
amended from time to time, together with any similar standards of good laboratory practice as are required by any Regulatory Authority in the Territory. 

  

	 	1.45	“Improvement to Agensys Background Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Agensys Background
Know-How (including any Agensys Payload Technology or Agensys Antibody(ies) within the Agensys Background Know-How). 

  

	 	1.46	“Improvement to Agensys Payload Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Agensys Background
Know-How (including any Improvement to Agensys Payload Technology Solely Developed by Agensys). 

  

	 	1.47	“Improvement to Ambrx Background Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Ambrx Background
Know-How (including any Improvement to Ambrx Payload Technology Solely Developed by Ambrx). Notwithstanding the foregoing, “Improvement to Ambrx Background Technology” shall exclude any Collaboration Information and Invention that is
(i) an Improvement to Ambrx Payload Technology (other than an Improvement to Ambrx Payload Technology Solely Developed by Ambrx), (ii) an Improvement to Agensys Background Technology and/or 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 - 8
- 

	 	
(iii) an Active Selected Target, Commercial Target, Agensys Antibody(ies), Compound or Product (or specifically related to, or applicable to, an Active Selected Target, Commercial Target,
Compound, Agensys Antibody(ies) or Product). 

  

	 	1.48	“Improvement to Ambrx Payload Technology” shall mean any Collaboration Information and Invention which is an improvement, modification, alteration or enhancement of any Ambrx
Payload Technology within the Ambrx Background Know-How. 

  

	 	1.49	“Improvement to Ambrx Payload Technology Solely Developed by Ambrx” shall mean any Improvement to Ambrx Payload Technology that is conceived, discovered, developed, invented, reduced to practice
and/or otherwise made solely by employees of Ambrx or other persons (not employed by Agensys (or any of its Affiliates)) acting on behalf of Ambrx. 

  

	 	1.50	“IND” shall mean an Investigational New Drug application, or similar application, to conduct human clinical investigations filed with or submitted to the applicable Regulatory Authority in
conformance with the requirements of such Regulatory Authority. 

  

	 	1.51	“IND-Enabling Pharmacology and Toxicology Study” shall mean a genotoxicity, acute toxicology, safety pharmacology and sub-chronic toxicology study, in species that satisfy applicable regulatory
requirements, using applicable GLP, that meets the standard necessary for submission as part of an IND filing with the applicable Regulatory Authority, as reasonably determined by Agensys. 

 

	 	1.52	“Initiates” or “Initiation” shall mean, with respect to a Clinical Trial, the administration of the first dose to a patient in such Clinical Trial. 

 

	 	1.53	“Joint Collaboration Information and Inventions” shall mean all Collaboration Information and Inventions, patentable or otherwise, that are conceived, discovered, developed, invented, reduced to
practice and/or otherwise made under the Research Program jointly by employee(s) of Agensys and/or its Affiliate and/or a Third Party acting on behalf of Agensys or its Affiliate, on the one hand, and employee(s) of Ambrx and/or a Third Party acting
on behalf of Ambrx, on the other hand. 

  

	 	1.54	“Joint Patent Rights” shall mean all Patent Rights to the extent claiming patentable Joint Collaboration Information and Inventions. 

 

	 	1.55	“JPT” shall mean the joint project team established to facilitate the Research Program, as more fully described in Section 2.4. 

 

	 	1.56	“Major Markets” shall mean the following countries: the United States, Japan, the United Kingdom, France, Germany, Italy and Spain. 

 

	 	1.57	“Major Market in the EU” shall mean any one of the following countries: the United Kingdom, France, Germany, Italy or Spain. 

  
 - 9 - 

	 	1.58	“Marketing Authorization” shall mean all approvals from the relevant Regulatory Authority necessary to market and sell a Product in a given country in the Territory (including all applicable
pricing and governmental reimbursement approvals legally required to sell Product in such country). 

  

	 	1.59	“MTA” shall mean a material transfer agreement entered into between the Parties setting forth a plan for research activities directed towards a Target. 

 

	 	1.60	“NDA” shall mean a New Drug Application, Biologics License Application, Worldwide Marketing Application, Marketing Authorization Application, filing pursuant to Section 510(k) of the Act, or
similar application or submission for Marketing Authorization of a Product filed with a Regulatory Authority to obtain marketing approval for a biological, pharmaceutical or diagnostic product in a given country or group of countries.

  

	 	1.61	“Net Sales” shall mean the gross invoice price (not including value added taxes, sales taxes, or similar taxes) of Product sold by Agensys or its Related Parties to the first Third Party after
deducting, if not previously deducted, from the amount invoiced or received: 

  

	 	(a)	trade and quantity discounts actually given other than early payment cash discounts; 

  

	 	(b)	returns, rebates, chargebacks and other similar fees and allowances actually taken; 

  

	 	(c)	retroactive price reductions that are actually allowed or granted; 

  

	 	(d)	deductions to gross invoice price of Product imposed by Regulatory Authorities or other governmental entities; 

  

	 	(e)	sales commissions, distribution fees and other similar fees paid to Third Party distributors and/or selling agents actually paid; 

 

	 	(f)	early payment cash discounts, transportation and insurance, and custom duties actually taken; and 

  

	 	(g)	the standard inventory cost of devices or delivery systems used for dispensing or administering or delivering Product. 

Any individual items that are estimated and deducted in calculating Net Sales shall be periodically (but at least on a Calendar Quarter basis)
trued up and adjusted by Agensys consistent with its customary practices and in accordance with generally accepted accounting principles (“GAAP”). Any deductions subsequently reversed shall be included in Net Sales for the royalty
period in which such deductions are reversed. The calculation of Net Sales hereunder shall be in accordance with GAAP and Agensys’ and/or its Affiliates’ customary accounting policies, applied consistently across periods.

  
 - 10 - 

 
With respect to sales of Combination Products, Net Sales shall be calculated on the basis of the gross invoice price of Product(s) containing the same strength of Compound sold without other
active ingredients. In the event that Product is sold only as a Combination Product, Net Sales shall be calculated on the basis of the gross invoice price of the Combination Product multiplied by a fraction, the numerator of which shall be the
inventory cost of Compound in the Product and the denominator of which shall be the inventory cost of all of the active ingredients in the Combination Product. Inventory cost shall be determined in accordance with Agensys’ and/or its
Affiliates’ customary accounting policies, applied consistently across periods. The deductions set forth in paragraphs (a) through (g) above will be applied in calculating Net Sales for a Combination Product. In the event that Product
is sold only as a Combination Product and either Party reasonably believes that the calculation set forth in this Paragraph does not fairly reflect the value of the Product relative to the other active ingredients in the Combination Product, the
Parties shall negotiate, in good faith, other means of calculating Net Sales with respect to Combination Products. 
  

	 	1.62	“Open Terminated Compound” shall mean any Compound (a) that does not contain Agensys Know-How and is not covered by claims within Agensys Patent Rights and (b) for which
Agensys’ exclusive licenses under Ambrx intellectual property as set forth in Sections 3.1.1(d) and 3.1.1(e) are terminated as a result of the termination of this Agreement in its entirety, termination of this Agreement on a Target-by-Target
basis or Product-by-Product basis, as applicable, or replacement or abandonment of a Target pursuant to Section 2.14. For clarity, once a given Compound becomes an Open Terminated Compound, it shall no longer be considered a
“Compound” for purposes of this Agreement. 

  

	 	1.63	“Open Terminated Product” shall mean any pharmaceutical or biological preparation in final form containing an Open Terminated Compound. For clarity, once a given Product becomes an Open
Terminated Product, it shall no longer be considered a “Product” for purposes of this Agreement. 

  

	 	1.64	“Open Terminated Target” shall mean (i) a Research Stage Target or an Active Selected Target which Agensys has replaced as set forth in Section 2.1.3 or with respect to which Agensys
has abandoned efforts under the Research Program or (ii) such Commercial Target to which a Compound or Product has Primary Activity and which Commercially Reasonable Efforts are no longer being applied by Agensys for such Compound or Product or
the First Commercial Sale has occurred but no royalties are being paid for such Product, in each of (i) and (ii) that is not covered by one or more claims in the Agensys Patent Rights. For clarity, once a given Target becomes an Open
Terminated Target, it shall no longer be considered a “Target” (whether “Research Stage Target,” “Active Selected Target” or “Commercial Target”) for purposes of this Agreement. 

 

	 	1.65	“Party” shall mean Agensys or Ambrx, individually, and “Parties” shall mean Agensys and Ambrx, collectively. 

  
 - 11 - 

	 	1.66	“Patent Rights” shall mean (i) patents and patent applications in the Territory (which for the purposes of this Agreement shall be deemed to include certificates of invention and
applications for certificates of invention) and (ii) any and all divisionals, continuations, continuations-in-part, reissues, renewals, substitutions, registrations, re-examinations, revalidations, extensions, supplementary protection
certificates and the like of any such patents and patent applications, and any and all foreign equivalents of the foregoing in the Territory. 

  

	 	1.67	“Payload Technology” shall mean any technology (including any information, processes, methods and know-how), patentable or otherwise, in which a functional group is used to link or attach, by a
covalent bond or otherwise, one or more cytotoxic agents to an Antibody to form an antibody drug conjugate. 

  

	 	1.68	1.60 1.61 “Person” means any individual, partnership, joint venture, limited liability company, corporation, firm, trust, association, unincorporated organization, governmental
authority or agency, or any other entity not specifically listed herein. 

  

	 	1.69	“Phase I Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(a), as may be amended, or the foreign equivalent thereof.

  

	 	1.70	“Phase II Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(b), as may be amended, or the foreign equivalent thereof.

  

	 	1.71	“Phase III Clinical Trial” shall mean a human clinical trial in any country that would satisfy the requirements of 21 CFR 312.21(c), as may be amended, or the foreign equivalent thereof.

  

	 	1.72	“Primary Activity” shall mean that the Antibody targeting moiety directed to a Target has preferential binding activity in an in vitro assay meant to measure such activity against such
Target. 

  

	 	1.73	“Product” shall mean any pharmaceutical or biological preparation in final form containing a Compound, including any Combination Product. For clarity, different formulations or dosage strengths
of a given Product shall be considered the same Product for purposes of this Agreement. 

  

	 	1.74	“Program Payload Technology” shall mean any Payload Technology that is a Collaboration Information and Invention. 

 

	 	1.75	 “ReCODETM Modification” shall mean the design, creation, modification and/or generation of compounds against
a Target through the incorporation, substitution or addition of one or more non-naturally encoded amino acids (i.e., amino acids other than the 20 naturally-encoded amino acids), including non-naturally encoded amino acids providing one or more
points of site-specific attachment for a drug, into the amino acid 

  
 - 12 - 

	 	
sequence of the Antibody comprising such compounds against a Target using ReCODETM Technology. 

 

	 	1.76	“ReCODETM Technology” shall mean Ambrx Patent Rights and Ambrx Know-How (i) necessary for performing ReCODETM Modification and/or (ii) directed to or necessary for expressing,
or chemically modifying, Compounds resulting from ReCODETM Modification. 

  

	 	1.77	“Regulatory Authority” shall mean any applicable government regulatory authority involved in granting approvals for the manufacturing, marketing, reimbursement and/or pricing of a Product in the
Territory, including, in the United States, the United States Food and Drug Administration and any successor governmental authority having substantially the same function. 

 

	 	1.78	“Related Party” shall mean each of Agensys, its Affiliates, and their respective sublicensees (which term does not include distributors), as applicable. 

 

	 	1.79	“Research Plan” shall mean the plan for conducting activities under the Research Program as set forth on Schedule 1.79, as such plan may be updated from time to time in accordance
with this Agreement. 

  

	 	1.80	“Research Program” shall mean the research activities undertaken by the Parties to discover, identify and optimize Compounds developed against the Active Selected Targets, using, among other
things, ReCODETM Technology and/or EuCODETM Technology, as more fully set forth in Article 2 and the Research Plan. 

  

	 	1.81	“Research Term” shall mean that period of time beginning on the Effective Date and ending on the fourth (4th) anniversary of the Effective
Date, subject to early termination or extension as set forth in Section 2.8. 

  

	 	1.82	“Royalty Product” shall mean a Product that (i) contains a Compound that was Discovered under the Research Program and (ii) is used against a Commercial Target. 

 

	 	1.83	“Scripps License” shall mean that certain License Agreement by and between The Scripps Research Institute (“Scripps”) and Ambrx, dated as of August 26, 2003, as amended by
Amendment No. 1, dated December 19, 2005, and as the same may be amended from time to time. 

  

	 	1.84	“Target” shall mean a cell surface molecule to which the Antibody portion of the Antibody Drug Conjugate preferentially binds to deliver a cytotoxic compound with the goal of Primary Activity in
the Field. 

  

	 	1.85	“Target 1” shall mean the Target known as [***] as more particularly described in Schedule 1.85, and shall include all naturally occurring variants, naturally occurring 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
13 - 

	 	
fragments and naturally occurring homologs and other naturally occurring derivatives thereof. 

  

	 	1.86	“Target 2” shall mean the Target known as [***] as more particularly described in Schedule 1.85, and shall include all naturally occurring variants, naturally occurring fragments and
naturally occurring homologs and other naturally occurring derivatives thereof. 

  

	 	1.87	“Target 3” shall mean the Target known as [***] as more particularly described in Schedule 1.85, and shall include all naturally occurring variants, naturally occurring fragments and
naturally occurring homologs and other naturally occurring derivatives thereof. 

  

	 	1.88	“Territory” shall mean all of the countries in the world, and their territories and possessions. 

  

	 	1.89	“Third Party” shall mean an entity other than Agensys and its Affiliates, and Ambrx. 

  

	 	1.90	“UC Berkeley License” shall mean that certain Exclusive License for Cycloadditions in Biological Systems Promoted by Strained II-Bonds by and between The Regents of the University of California
(“UC Berkeley”) and Ambrx, dated as of December 16, 2009, as the same may be amended from time to time in accordance with this Agreement and the UC Berkeley Sublicense. 

 

	 	1.91	“UC Berkeley Technology” shall mean (i) any and all information and materials, including discoveries, improvements, processes, methods, protocols, formulas, data, inventions, know-how and/or trade
secrets, patentable or otherwise, and (ii) any and all Patent Rights, in each case of (i) and (ii), which are licensed to Ambrx pursuant to the that certain UC Berkeley License. 

 

	 	1.92	“Valid Patent Claim” shall mean a claim of an issued and unexpired patent included within (i) the Ambrx Patent Rights and/or (ii) Joint Patent Rights, in either case, that claim
(A) the applicable Compound as a composition of matter or (B) the manufacture, use or sale of the applicable Compound and/or Product, which claim has not been revoked or held unenforceable or invalid by a decision of a court or other
governmental agency of competent jurisdiction (which decision is not appealable or has not been appealed within the time allowed for appeal), and which claim has not been disclaimed, denied or admitted to be invalid or unenforceable through reissue,
re-examination or disclaimer or otherwise. 

  

	 	1.93	“Violation” shall mean that a Party or any of its officers or directors or any other personnel (or other permitted agents of such Party performing activities hereunder) has been:
(1) convicted of any of the felonies identified among the exclusion authorities listed on the U.S. Department of Health and Human Services, Office of Inspector 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
14 - 

	 	
General (OIG) website, including 42 U.S.C. 1320a-7(a) (http://oig.hhs.gov/exclusions/authorities.asp); (2) identified in the OIG List of Excluded Individuals/Entities (LEIE) database
(http://exclusions.oig.hhs.gov/) or the U.S. General Services Administration’s list of Parties Excluded from Federal Programs (http://www.epls.gov); or (3) listed by any US Federal agency as being suspended, debarred, excluded or otherwise
ineligible to participate in Federal procurement or non-procurement programs, including under 21 U.S.C. 335a (http://www.fda.gov/ora/compliance_ref/debar/) (each of (1), (2) and (3) collectively the “Exclusions Lists”).

  

	 	1.94	Additional Definitions. The following terms have the meanings set forth in the corresponding Sections of this Agreement: 

  

			
	 Term
	  	 Section

		
	“AAA”	  	10.6.1
	“Additional Third Party Licenses”	  	5.4.7(b)
	“Agensys Indemnified Parties”	  	9.2
	“Ambrx Indemnified Parties”	  	9.1
	“Code”	  	8.4(d)
	“Development/Commercialization Milestones”	  	5.3.2
	“Development Milestone 1”	  	5.3.2
	“Development Milestone 2”	  	5.3.2
	“Development Milestone 3”	  	5.3.2
	“Development Milestones”	  	5.3.2
	“Eliminated FTE”	  	5.2.4
	“Excluded Claim”	  	10.6.6
	“Exclusions Lists”	  	1.93
	“Human Materials”	  	2.2.2
	“Indemnified Party”	  	9.3
	“Indemnifying Party”	  	9.3
	“License Payments”	  	5.8
	“MTA”	  	2.1.4
	“Materials”	  	2.9
	“New Target Notice”	  	2.1.3(a)
	“Officials”	  	2.11.1
	“Payment”	  	2.11.1
	“Project Leader”	  	2.4.3
	“Providers”	  	2.2.2
	“Regeneron Licenses”	  	5.4.7(a)
	“Research Milestone”	  	5.3.1
	“Research Stage Targets”	  	1.2
	“Royalty Term”	  	5.4.4
	“Sensitive Information”	  	10.2
	“Taxes”	  	5.8

  
 - 15 - 

			
	“Term”	  	8.1
	“Third Party MTA Research Costs”	  	5.2.2
	“Third Party Research Costs”	  	5.2.1(a)
	“Valid Scientific Reasons”	  	2.1.3(a)

 ARTICLE 2 

RESEARCH PROGRAM 
  

	 	2.1	General; Research Stage Targets and Active Selected Targets and Research Plans 

  

	 	2.1.1	Research Program in General. During the Research Term, Ambrx and Agensys shall engage in the Research Program upon the terms and conditions set forth in this Agreement and as directed by the JPT. Subject
to Sections 2.1.3(b) and 2.1.4, at any one time, up to four (4) Research Stage Targets or MTAs may be the subject of research activities under the Research Program. The activities to be undertaken in the course of the Research Program shall be
set forth in the Research Plan, and updated on an annual basis (or more frequently upon the addition or substitution of a Research Stage Target, or otherwise in the discretion of the JPT). The Research Plan shall provide that Ambrx shall solely be
responsible for (a) making the research quantities of recombinant Antibodies incorporating non-natural amino acids under the Research Plan for use in the Research Program and (b) EuCODETM Modification activities and ReCODETM
Modification activities involving the use or application of EuCODETM Technology or ReCODETM Technology under the Research Plan (subject to Section 2.5.2) for the Research Program, in each case, during the Research Term.

  

	 	2.1.2	Identification of Active Selected Targets. The Parties hereby agree and acknowledge that three (3) Active Selected Targets (Target 1, Target 2 and Target 3) have been identified by the Parties as of
the Effective Date and are more particularly described on Schedule 1.85. 

  

	 	2.1.3	Substitution of Targets; Addition of Targets. 

  

	 	(a)	Substitution of Research Stage Target(s) by New Target(s). Agensys may replace up to three (3) Research Stage Targets for Valid Scientific Reasons prior to the initiation of IND-Enabling Pharmacology
and Toxicology Studies for a Compound with Primary Activity against a particular Research Stage Target pursuant to the procedure set forth in this Section 2.1.3(a). In addition, the JPT, by unanimous decision, may determine to replace up to
three (3) Research Stage Targets. For clarity, no more than three (3) Research Stage Targets may be replaced during the Research Term, whether at the request of Agensys or by unanimous decision of the JPT. 

If Agensys wishes, in its sole discretion but pursuant to the procedure set forth in this Section 2.1.3(a), or under agreement by the
JPT, to replace a Research Stage Target with another Target, it shall provide written notice to Ambrx of the 

  
 - 16 - 

 
proposed new Research Stage Target (the “New Target Notice”). Within thirty (30) days of receipt of the New Target Notice, Ambrx shall provide written notice to Agensys that
such new Research Stage Target may proceed as part of the Research Program. If Ambrx has a contractual or strategic limitation on accepting the new Target as an Active Selected Target or Commercial Target hereunder or if Ambrx reasonably believes
that the Target is not directed to the Field, the JPT shall decide whether to permit such new Target as an Active Selected Target. A contractual limitation shall consist of an executed material transfer agreement or license agreement with a Third
Party with respect to such new Target; a strategic limitation shall consist solely of an active internal Ambrx program4 at the time of receipt of the New Target Notice. If Ambrx has a contractual
or strategic limitation on accepting the new Target, Agensys may propose an alternate new Target. Upon acceptance of the new Research Stage Target, the JPT shall amend the Research Plan to include such new Target to set forth the proposed research
activities for such new Target. 
 For purposes of this Section 2.1.3(a), “Valid Scientific Reasons,” with respect to
a Research Stage Target, shall be valid scientific and/or technical data available during the Research Term, whether generated pursuant to the Research Program or by a Third Party, specifically not including commercial reasons or decisions or any
strategic decision by Agensys related to such Target or the Field. 
  

	 	(b)	Addition of Active Selected Targets. In the event that Agensys files an IND for a Compound during the Research Term: (i) upon [***], Agensys may propose one (1) additional Research Stage Target
at any time during the Research Term; or (ii) upon [***], Agensys may propose two (2) additional Research Stage Targets during the Research Term. For clarity, if Agensys [***], up to three (3) Research Stage Targets may be the subject
of the Research Program (with a new Research Stage Target replacing the Active Selected Target [***]), and if Agensys [***], up to four (4) Research Stage Targets may be the subject of the Research Program. 

If Agensys wishes to propose additional Research Stage Target(s) pursuant to this Section 2.1.3(b), it shall provide written notice to
Ambrx of the additional Active Selected Target(s) (the “Additional Target Notice”). Within thirty (30) days of receipt of the Additional Target Notice, Ambrx shall provide written notice to Agensys and to the JPT that such new
Research Stage Target may proceed as part of the Research Program. If Ambrx has a contractual or strategic limitation on accepting the new Target as an Active Selected Target or Commercial Target hereunder or if Ambrx reasonably believes that the
Target is not directed to the Field, the JPT shall decide whether to permit such new Target as an Active Selected Target. A contractual limitation shall consist of an executed material 

  

	4 	The Parties to determine the criteria for determining whether Ambrx has an “active internal program.” 

***Certain information on this page has been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the
omitted portions. 
 - 17 - 

 
transfer agreement or license agreement with a Third Party with respect to such new Target; a strategic limitation shall consist solely of an active internal Ambrx program (see, 2.1.3(c)) at the
time of receipt of the Additional Target Notice. If Ambrx has a contractual or strategic limitation on accepting the new Target, Agensys may propose an alternate new Target. Upon acceptance of the new Active Selected Target(s), the JPT shall amend
the Research Plan to include such new Active Selected Target(s) to set forth the proposed research activities for such new Active Selected Target(s). 
  

	 	(c)	The Parties further agree that for the purposes of this Agreement, an active internal Ambrx program shall consist of Ambrx having completed an in vivo efficacy study of an Antibody Drug Conjugate against
such additional Active Selected Target. 

  

	 	2.1.4	MTAs. In the event there are either no or one (1) Active Selected Target(s) in the Research Program (e.g., an Active Selected Target has dropped out of the Research Program or an IND-Enabling
Pharmacology and Toxicology Study has been initiated for at least two (2) of the Active Selected Targets), Agensys may propose that Ambrx and Agensys enter into up to three (3) material transfer agreements for research purposes only (each,
an “MTA”). The form of MTA to be used is attached hereto as Exhibit 2.1.4. For each MTA, Agensys will nominate in writing up to three (3) Antibodies to a single Target suitable for the creation of an Antibody containing
an Ambrx non-natural amino acid and/or Antibody Drug Conjugates with Primary Activity against such Target. The Parties will mutually agree to a research plan associated with each MTA and, in connection with such MTA research plan, Ambrx will deliver
(i) Antibodies containing the Ambrx non-natural amino acid and (ii) Ambrx linker and toxins in sufficient quantities for Agensys to evaluate Antibody(ies) containing an Ambrx non-natural amino acid and/or Antibody Drug Conjugates in
standard in vitro and in vivo rodent efficacy models. The term of each MTA will be no longer than the Research Term, unless Ambrx agrees otherwise. 

  

	 	2.1.5	 Research Plan. The Parties hereby acknowledge and agree that the initial Research Plan for the activities under the Research Program is
attached hereto as Schedule 1.79. Ambrx shall use Commercially Reasonable Efforts to provide the FTEs set forth in the Research Plan. Within ninety (90) days of the acceptance (or deemed acceptance) of a new Target by Ambrx and/or the
JPT as a replacement or additional Active Selected Target or the execution of an MTA, the JPT shall create and approve the plan for conducting activities under the Research Program which incorporate research activities directed at the new Research
Stage Target (or Antibodies in the case of an MTA), which plan shall contain similar elements and level of detail as the initial Research Plan. Upon approval by the JPT, such plan shall become the amended Research Plan provided that any such amended
Research Plan and MTA may not obligate Ambrx to incur additional expenses (other than provision of the number of FTEs or other expenses as set forth in the then-applicable Research Plan and the then-effective MTAs) unless

  
 - 18 - 

	 	
(x) Ambrx agrees in writing or (y) Agensys agrees to fund such additional expense (which may include FTEs and Third Party Costs, as applicable, in accordance with Section 5.2).

  

	 	2.1.6	Limitation on FTEs. Notwithstanding anything in this Agreement, Ambrx shall not be obligated to provide more than eight (8) FTEs per Calendar Quarter pursuant to the Research Plan and any effective
MTAs. 

  

	 	2.1.7	Research Collaboration Procedure; General. The Parties agree that the Research Plan, as set forth in Schedule 1.79, shall control the activities conducted under the Research Program. Generally, the
activities under the Research Plan, shall require Agensys to transfer to Ambrx an Antibody which shall be modified using either a EUCODE Modification or RECODE Modification. Upon a EUCODE Modification or RECODE Modification, Ambrx shall transfer the
naked Antibody(ies) or Antibody Drug Conjugates to Agensys for evaluation. The following table shows the procedure for the Research Collaboration: 

  

									
	 	  	 Activity
	  	 Description
	  	 Performed by
	 
				
	1	  	[***]	  	[***]	  	 	[***]	  
				
	2	  	[***]	  	[***]	  	 	[***]	  
				
	3	  	[***]	  	[***]	  	 	[***]	  
				
	4	  	[***]	  	[***]	  	 	[***]	  
				
	5	  	[***]	  	[***]	  	 	[***]	  
				
	6	  	[***]	  	[***][***][***][***]	  	 	[***]	  

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
19 - 

									
	 	  	 Activity
	  	 Description
	  	 Performed by
	 
	7	  	[***]	  	[***]	  	 	[***]	  

  

	 	2.2	Conduct of Research 

  

	 	2.2.1	Activities and Efforts. Ambrx and Agensys each shall use Commercially Reasonable Efforts to accomplish the objectives of the Research Program, including to perform all activities to be performed by such
Party as set forth in the Research Plan, and in connection therewith, each Party shall maintain and utilize sufficient equipment, laboratories, offices and other facilities, and use personnel with sufficient skills and experience, in each case, as
are required to accomplish the Research Program in accordance with the terms of this Agreement and the Research Plan, as applicable. 

  

	 	2.2.2	Compliance. Ambrx and Agensys each shall conduct the Research Program in compliance with all Applicable Laws. In addition, if animals are used in research under the Research Program hereunder, the Parties
will comply with the Animal Welfare Act or any other applicable local, state, national and international laws and regulations relating to the care and use of laboratory animals, and are encouraged to use the highest standards, such as those set
forth in the Guide for the Care and Use of Laboratory Animals (NRC, 1996), for the humane handling, care and treatment of such research animals. Any animals which are used in the course of the Research Program, or products derived from those
animals, such as eggs or milk, will not be used for food purposes, nor will these animals be used for commercial breeding purposes. In addition, if any human cell lines, tissue, human clinical isolates or similar human-derived materials
(“Human Materials”) have been or are to be collected and/or used in the Research Program, each Party represents and warrants (i) that it has complied, or shall comply, with all Applicable Laws relating to the collection and/or
use of the Human Materials and (ii) that it has obtained, or shall obtain, all necessary approvals and appropriate informed consents, in writing, for the collection and/or use of such Human Materials, and such Party shall provide documentation
of such approvals and consents to the other upon request. Each Party shall notify the other Party in writing of any deviations from applicable regulatory or legal requirements. Each Party hereby certifies that it has not employed or otherwise used
in any capacity, and will not employ or otherwise use in any capacity, the services of any person debarred under United States law, including but not limited to Section 21 USC 335a, or foreign equivalent thereof, in performing any portion of
the Research Program. Each Party shall notify the other Party in writing immediately if any such debarment occurs or comes to its attention, and shall, with respect to any 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
20 - 

 
person or entity so debarred promptly remove such person or entity from performing any Research Program activities, function or capacity related to the Research Program. 

 

	 	2.2.3	Subcontractors. Agensys shall be entitled to utilize the services of its Affiliates and Third Parties to perform its Research Program activities as specifically set forth in the Research Plan. Ambrx shall
be entitled to utilize the services of Third Parties to perform its Research Program activities only upon Agensys’ prior written consent, not to be unreasonably withheld, or as specifically set forth in the Research Plan. Each Party shall
remain at all times fully liable for its respective responsibilities under the Research Program. In all cases, the rights granted to any subcontractor shall be subject and subordinate to the applicable terms and conditions of this Agreement. The
applicable Party engaging a subcontractor shall oversee the performance by its subcontractors of the subcontracted activities in a manner that would be reasonably expected to result in their timely and successful completion of such activities, and
such Party shall remain responsible and primarily and fully liable for the performance of such activities in accordance with this Agreement. Each Party hereby expressly waives any requirement that the other Party exhaust any right, power or remedy,
or proceed against such subcontractor for any obligation or performance hereunder, prior to proceeding directly against the Party engaging such subcontractor. The Party engaging a subcontractor shall ensure compliance with the applicable terms of
this Agreement by any such subcontractor with respect to the applicable activities to be performed by such subcontractor hereunder, including with respect to provisions on confidentiality and intellectual property ownership and compliance with legal
requirements. Without limiting the foregoing, to the extent that a Party utilizes Third Party contractors to perform Research Program activities, such Party shall ensure that such Third Party contractors are obligated to assign rights to any
Collaboration Information and Inventions made by such Third Party contractors so that such rights can be conveyed in accordance with the terms and conditions of this Agreement, including Section 2.7. 

 

	 	2.3	Use of Research Funding 

 Ambrx shall apply the research funding it receives from
Agensys under this Agreement to carry out its Research Program activities in accordance with the Research Plan and the terms and conditions of this Agreement. 
  

	 	2.4	Joint Project Team 

 The Parties hereby establish a JPT to facilitate the Research
Program as follows: 
  

	 	2.4.1	 Composition of the JPT. The Research Program shall be conducted under the direction of the JPT comprised of three
(3) representatives of Agensys (and/or its Affiliate) and three (3) representatives of Ambrx. Each Party shall provide the other with a list of its initial members of the JPT no later than thirty (30) days after the Effective Date,
and each Party may change its representatives to the JPT 

  
 - 21 - 

	 	
from time to time, in its sole discretion, effective upon notice to the other Party of such change. These representatives shall have appropriate technical credentials, experience and knowledge,
and ongoing familiarity with the Research Program. Additional representatives or consultants may from time to time, by mutual consent of the Parties, be invited to attend JPT meetings, subject to such representative’s or consultant’s
written agreement to comply with the requirements of Section 4.1. The JPT shall be chaired by a representative of Agensys (or its Affiliate), who shall prepare written initial draft minutes of all JPT meetings within thirty (30) days
following such meetings, and shall circulate such minutes to the JPT members. Ambrx shall provide written comments within twenty (20) days of receipt from Agensys. Final minutes shall be ratified at the next JPT meeting. Decisions of the JPT
shall be made unanimously by the representatives, with each Party having a single vote. In the event that the JPT cannot or does not, after good faith efforts, reach agreement on an issue, the issue will be communicated to the President of Agensys
and the CEO of Ambrx, who shall endeavor to facilitate a resolution of such issue. If the Parties have not resolved such issue within fifteen (15) business days following the communication of the issue to them, then such matter shall be subject
to dispute resolution pursuant to Section 10.6). Except as agreed by the Parties in the Research Plan or an MTA, each Party shall bear its own expenses related to the attendance of such meetings by its representatives. 

 

	 	2.4.2	Meetings and Responsibilities. 

  

	 	(a)	During the Research Term, the JPT shall meet in accordance with a schedule established by mutual written agreement of the Parties, but no less frequently than once per Calendar Quarter, by means of
teleconference, videoconference or other similar communications equipment; provided, however that the JPT will meet in person at least once each Calendar Year, on or around the anniversary of the Effective Date, for the purpose of finalizing the
research activities to be undertaken in the forthcoming twelve (12) months; provided further, the JPT will meet in person six (6) months prior to the expiration of the Research Term to permit Agensys to prioritize any ongoing research
activities to be performed by Ambrx and to facilitate successful completion of the Research Program. 

  

	 	(b)	 The JPT shall be responsible for directing the Research Program and the research activities under each MTA(s) and making decisions and
determinations in connection therewith, including (i) to review and approve the annual (or more frequent) updates and/or amendments to the Research Plan, (ii) to review and approve the research activities under each MTA, (iii) to
review and coordinate the Parties’ activities under the Research Program or any MTA, (iv) to confer regarding the status of the Research Program and the progress under the Research Program, (v) to review relevant data under the
Research Program, (vi) to consider and advise on any technical issues that arise under the Research Program, (vii) to consider issues of priority of activities under the Research Program and any MTA, (viii) to discuss intellectual
property strategy and other intellectual property 

  
 - 22 - 

	 	
matters under the Research Program, and to discuss matters related to Agensys Background Know-How, Agensys Patent Rights, Ambrx Background Know-How and Ambrx Patent Rights, which a Party proposed
to make available or has made available for use in connection with performance of activities under the Research Program, and to discuss other relevant Third Party intellectual property rights, (ix) to review and advise on any budgetary,
economic, and business matters relating to the Research Program (including to allocate resources across the projects and to determine the number of FTEs needed to conduct the Research Program activities), and (x) ratifying prior JPT minutes.

  

	 	2.4.3	Project Leaders. Agensys and Ambrx each shall appoint a person (a “Project Leader”) from the JPT to coordinate its part of the Research Program and activities under any MTA. The Project
Leaders shall be the primary contact between the Parties with respect to the Research Program and the MTAs. Each Party shall notify the other within thirty (30) days of the Effective Date of the appointment of its Project Leader and shall
notify the other Party as soon as practicable upon changing this appointment. The Parties further agree that Project Leaders may be substituted from time to time upon written notice to the other Party. 

 

	 	2.4.4	Limitations on Authority of the JPT. The JPT will have solely the roles and responsibilities assigned to it in this Section 2.4. The JPT will have no authority to amend, modify or waive compliance
with this Agreement (provided that for clarity, the JPT shall have the right to amend or modify the Research Plan as set forth in this Section 2.4). For clarity, once Agensys has paid the Research Milestone for a particular Target, the JPT
shall no longer have authority with respect to further pre-clinical or clinical development activities related to such Target. 

  

	 	2.4.5	Disbandment of JPT. Following the Research Term, the JPT shall have no further authority with respect to the Compounds Discovered under the Research Program. The JPT shall be disbanded and the JPT shall
have no further authority with respect to the activities hereunder, and all further research and development of Compounds hereunder shall be in accordance with Section 3.5. 

 

	 	2.5	Exchange of Information 

  

	 	2.5.1	Ambrx Background Know-How. Within a reasonable time period following execution of this Agreement (but in all cases within thirty (30) days after the Effective Date), and promptly on an ongoing basis
during the Research Term, Ambrx shall disclose to Agensys in English (and deliver in writing or in an electronic format) Ambrx Background Know-How related to the effects of the non-native amino acid format on process, protein folding, stability,
pharmacokinetics and safety not previously disclosed in writing to Agensys. 

  

	 	2.5.2	 EuCODETM Modification or ReCODETM Modification during Research Term. Unless otherwise agreed by the Parties in writing, Ambrx
shall be solely 

  
 - 23 - 

	 	
responsible for all EuCODETM Modification activities and ReCODETM Modification activities involving the use or application of EuCODETM Technology or ReCODETM Technology under the
Research Plan during the Research Term. 

  

	 	2.6	Records and Reports 

  

	 	2.6.1	Records. Ambrx shall maintain complete and accurate records, in sufficient detail and in good scientific manner appropriate for patent and regulatory purposes, which shall fully and properly reflect all
work done and results achieved in the performance of the Research Program by Ambrx, as well as the number of FTEs utilized by Ambrx for the performance of the Research Program. Agensys shall maintain complete and accurate records, in sufficient
detail and in good scientific manner appropriate for patent and regulatory purposes, which shall fully and properly reflect all work done and results achieved in the performance of the Research Program by Agensys. Upon request by a Party during the
Term, the other Party shall provide copies of the records described in Section 2.6.1 above (provided, however, that Ambrx shall only have the right to receive copies of such records with respect to Collaboration Information and Inventions over
which Ambrx has prosecution control as set forth in Article 7). 

  

	 	2.6.2	Copies and Inspection of Records. During the Term, Agensys shall have the right, during normal business hours and upon reasonable notice, to inspect and copy all such records of Ambrx referred to in
Section 2.6.1 in order to verify the number of FTEs utilized by Ambrx in the performance of the Research Program. Agensys shall have the right to arrange for its employees and/or consultants involved in the activities contemplated hereunder to
visit the offices and laboratories of Ambrx and any of its Third Party contractors during normal business hours and upon reasonable notice, and to discuss the Research Program work and its results in detail with the technical personnel and
consultants of Ambrx. 

  

	 	2.6.3	Quarterly Reports. Within thirty (30) days following the end of each Calendar Quarter during the Research Term, each Party shall provide to other Party a written progress report in English which shall
describe the work performed during such Calendar Quarter on the Research Program, evaluate the work performed in relation to the goals of the Research Program for such Calendar Quarter and provide such other information as may be required for the
Research Program or reasonably requested by such other Party relating to the progress of the goals or performance of the Research Program. 

  

	 	2.6.4	 Data Integrity. Each Party acknowledges the importance of ensuring that the Research Program is undertaken in accordance with the
following good data management practices: (i) data is being generated using sound scientific techniques and processes; (ii) data is being accurately and reasonably contemporaneously recorded in accordance with good scientific practices by
Persons conducting research hereunder; (iii) data is being analyzed appropriately 

  
 - 24 - 

	 	
without bias in accordance with good scientific practices; and (iv) all data and results are being stored securely and can be easily retrieved. Each Party agrees that it shall carry out the
Research Program so as to collect and record any data generated therefrom in a manner consistent with the foregoing requirements. 

  

	 	2.7	Research Collaboration Information and Inventions 

  

	 	2.7.1	Ownership. Inventorship of Collaboration Information and Inventions and Patent Rights directed thereto shall be determined in accordance with United States patent laws (regardless of where the applicable
activities occurred). Notwithstanding the foregoing, all right, title and interest in and to any and all Collaboration Information and Inventions and Patent Rights directed thereto shall be determined in accordance with the following terms and
conditions, such that the entire right, title and interest in: 

  

	 	(a)	Ambrx Collaboration Information and Inventions and Patent Rights directed thereto shall be owned solely by Ambrx; provided, however, that notwithstanding the foregoing; (i) any Ambrx Collaboration Information and
Invention and Patent Rights directed thereto that constitutes an improvement to Agensys Background Know-How shall be owned solely by Agensys (and shall be considered an Improvement to Agensys Background Technology), (ii) any Ambrx Collaboration
Information and Invention and Patent Rights directed thereto that constitutes any Payload Technology (other than an Improvement to Ambrx Payload Technology Solely Developed by Ambrx) shall be owned jointly by Ambrx and Agensys (and shall be
considered Joint Collaboration Information and Inventions) and (iii) any Patent Rights that claim or cover Collaboration Information and Inventions related to (A) Antibodies Controlled by Ambrx, including Antibodies controlled by Ambrx
with EuCODE Modifications or ReCODE Modifications, or (B) Compounds or Products incorporating Ambrx Antibodies and Ambrx Payload Technology shall be solely owned by Ambrx; 

 

	 	(b)	 Agensys Collaboration Information and Inventions and Patent Rights directed thereto shall be owned solely by Agensys; provided, however, that
notwithstanding the foregoing, (i) any Agensys Collaboration Information and Invention and Patent Rights directed thereto that constitutes an improvement to Ambrx Background Know-How shall be owned solely by Ambrx (and shall be considered an
Improvement to Ambrx Background Technology) and (ii) any Patent Rights that claim or cover Collaboration Information and Inventions related to (A) Agensys Antibodies, including Agensys Antibodies with EuCODE Modifications or ReCODE
Modifications, or (B) Compounds or Products incorporating Agensys Payload Technology, shall be solely owned by Agensys, and (c) any Patent Rights that claim or cover Collaboration Information and

  
 - 25 - 

	 	
Inventions that relate to an Improvement to Agensys Payload Technology, shall be solely owned by Agensys; and 

 

	 	(c)	Joint Collaboration Information and Inventions and Patent Rights directed thereto shall be owned jointly by Ambrx and Agensys; provided, however, that notwithstanding the foregoing, any Joint Collaboration
Information and Invention and Patent Rights directed thereto that constitutes (i) an Improvement to Agensys Background Technology shall be owned solely by Agensys (and shall be considered Agensys Collaboration Information and Inventions) or
(ii) an Improvement to Ambrx Background Technology shall be owned solely by Ambrx (and shall be considered Ambrx Collaboration Information and Inventions) and (iii) any Patent Rights that claim or cover Collaboration Information and
Inventions related to Compounds or Products comprising Antibody Drug Conjugates incorporating Agensys Antibodies with Ambrx Payload Technology shall be jointly owned. 

 

	 	2.7.2	Disclosure. Each Party shall promptly disclose to the other Party in writing the development, making, conception or reduction to practice of Collaboration Information and Inventions (including any
Compounds within such Collaboration Information and Inventions). including any Joint Collaboration Information and Inventions. 

  

	 	2.7.3	Assignment of Interests to Effectuate Ownership. With respect to any Collaboration Information and Invention, each of Ambrx and Agensys shall, and hereby do, on behalf of themselves and each of their
respective Affiliates, employees and contractors hereunder, assign to one another ownership of rights, title and interest in and to such Collaboration Information and Inventions and Patent Rights directed thereto to effect the ownership of such
Collaboration Information and Inventions and Patent Rights directed thereto as set forth in Section 2.7.1, subject to any licenses expressly granted under this Agreement. In furtherance of the foregoing, each Party shall, upon request by the
other, promptly undertake and perform (and/or cause its Affiliates and its and their respect employees and/or agents to promptly undertake and perform) such further actions as are reasonably necessary for Ambrx and Agensys, as between the Parties,
to each perfect its title in any such Collaboration Information and Inventions and Patent Rights directed thereto as set forth in Section 2.7.1, as applicable, including by causing the execution of any assignments or other legal documentation,
and/or providing the other Party or its patent counsel with reasonable access to any employees or agents who may be inventors of such Collaboration Information and Inventions and Patent Rights directed thereto. 

 

	 	2.7.4	 Joint Collaboration Information and Inventions. Except as otherwise set forth in Section 2.7.1(c), Ambrx and Agensys shall co-own
any and all Joint Collaboration Information and Inventions and Patent Rights directed thereto with the unfettered ability to use and license such Joint Collaboration Information and

  
 - 26 - 

	 	
Inventions and Patent Rights directed thereto for any and all purposes without the need to account to the other (subject, in all cases, to any other applicable terms of this Agreement, including
2.10, 3.1.1 and ARTICLE 5, in each case, to the extent applicable); provided, however, that for clarity, the foregoing joint ownership rights with respect to Joint Collaboration Information and Inventions and Patent Rights directed thereto shall not
be construed as granting, conveying or creating any license or other rights to the other Party’s intellectual property, unless otherwise expressly set forth in this Agreement; provided further, that Agensys shall not be permitted to use and/or
sublicense Joint Collaboration Information and Inventions and Patent Rights directed thereto in conjunction with any Target which has been an Active Selected Target at any point during the Research Term. For the sake of clarity, the intention of the
Parties is to preclude Agensys from utilizing Joint Collaboration Information and Inventions and Patent Rights directed thereto on any Antibody which binds a Target that was previously an Active Selected Target during the Research Term.

  

	 	2.8	Research Term 

  

	 	2.8.1	Term. Except as otherwise provided herein, the term of the Research Program shall commence on the Effective Date and continue throughout the Research Term, subject to early termination as set forth in
Section 2.8.2 or extension as set forth in Section 2.8.4. 

  

	 	2.8.2	Early Discontinuance of Research Program. Notwithstanding the provisions of Section 2.8.1, Agensys shall have the right, in its discretion, to discontinue the Research Program at any time prior to the
scheduled end of the Research Term at any time after the first anniversary of the Effective Date by providing no less than ninety (90) days prior written notice of such discontinuance to Ambrx. Upon delivery of such Research Program
discontinuance notice by Agensys to Ambrx (in accordance with Section 10.4), the Research Term shall automatically end on the date set forth in the discontinuance notice (but in any event no sooner than ninety (90) days following the
delivery of such discontinuance notice). Agensys is responsible for making all payments required under Section 5.2 during such ninety (90)-day period, unless the Parties agree otherwise. 

 

	 	2.8.3	 Discontinuance of Research Program Activities. Upon expiration of the Research Term or early discontinuance of the Research Program, all
further Research Program activities shall terminate, but the other rights and obligations under this Agreement shall not otherwise be affected and shall remain in full force and effect (including the rights of Agensys to further research and develop
Compounds and Products in accordance with this Agreement). Immediately upon the expiration of the Research Term or early discontinuance of the Research Program, (a) each Party shall disclose to the other Party those Collaboration Information
and Inventions as set forth in Section 2.7.2, and (b) Ambrx shall reimburse Agensys for any overpayments made by Agensys under the Research Program, and/or Agensys shall make any payments required under the Research Program (but

  
 - 27 - 

	 	
solely to the extent such amounts were incurred and/or constitute an irrevocable obligation to pay prior to the expiration or termination of the Research Program and are required to be paid by
Agensys in accordance with this Agreement), as the case may be. In addition, each Party shall return or cause to be returned to the other Party all Materials provided by the other Party under the Research Program (provided, however, that each Party
may retain any Materials as are reasonably necessary for such Party’s continued practice under any licenses which survive the termination of the Research Term). 

 

	 	2.8.4	Extension of Research Term. The Parties may mutually agree in writing to further extend the Research Program for one (1) or more additional years on terms and conditions to be mutually agreed.

  

	 	2.9	Materials 

 Each Party shall provide the other with sufficient quantities of its
research materials to conduct the activities under the Research Program as set forth in the Research Plan or as otherwise determined by the JPT (“Materials”, provided that for clarity, Compounds shall not be considered
“Materials”), which Materials shall be used solely for the purpose of enabling the Parties to perform their respective activities under the Research Program in accordance with the terms of this Agreement. The Materials are not to be used
in humans, nor shall any of the Materials, or any derivatives, analogs, modifications or components thereof, be transferred, delivered or disclosed to any Third Party (other than to permitted subcontractors hereunder in accordance with
Section 2.2.3) without the prior written approval of the delivering Party. Any unused Materials and any derivatives, analogs, modifications or components thereof shall be, at the delivering Party’s option, either returned or destroyed in
accordance with instructions given by the delivering Party. All such destruction shall be in accordance with Applicable Laws. Further, THE MATERIALS ARE PROVIDED “AS IS” AND WITHOUT ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR ANY PARTICULAR PURPOSE OR ANY WARRANTY THAT THE USE OF THE MATERIALS WILL NOT INFRINGE OR VIOLATE ANY PATENT OR OTHER PROPRIETARY RIGHTS OF ANY THIRD PARTY. 

 

	 	2.10	Exclusive Efforts.  

  

	 	2.10.1	(a) During the Research Term, on a Target-by-Target basis, Ambrx shall work exclusively with Agensys in the use of ReCode Technology or EuCode Technology to discover, research, identify and/or optimize Antibody(ies)
conjugated to Payload Technology for each of the Active Selected Targets for therapeutic use in humans. 

 (b) During the
Research Term, on a Target-by-Target basis, Agensys shall work exclusively with Ambrx to discover, research, identify and/or optimize Antibody(ies) conjugated to Payload Technology for each of the Active Selected Targets for therapeutic use in
humans; provided that Agensys may pursue such 

  
 - 28 - 

 
activities with respect to any program which is in existence as of the date on which a Target is nominated as a Research Stage Target. 

 

	 	2.10.2	For the avoidance of doubt, Section 2.10.1 shall not prohibit or otherwise limit Agensys from discovering, researching, developing, identifying, optimizing, commercializing or otherwise exploiting any
compounds or products other than Antibody Drug Conjugates which utilize Ambrx Background Know-How for a specific Target. In addition, Section 2.10.1 shall not apply with respect to Antibodies (under an MTA). Finally, Section 2.10.1 shall
not prohibit or otherwise limit Agensys from evaluating alternative Antibody Drug Conjugates or related Antibody Drug Conjugate know-how or other intellectual property rights for research purposes only. 

 

	 	2.10.3	Section 2.10.1 shall not prohibit a Third Party which becomes an Affiliate of a Party after the Effective Date due to a Change of Control involving such Party and such Third Party from discovering, researching,
developing, identifying or optimizing any Antibody conjugated to Payload Technology for an Active Selected Target or Commercial Target that was owned or otherwise controlled by such Third Party as of the time of such Change of Control; provided that
(y) such Affiliate does not engage in Research Program activities under this Agreement and (z) no Ambrx Know-How or Ambrx Patent Rights licensed to Agensys hereunder are utilized in connection with such Antibody. 

Notwithstanding the foregoing, in the event that this Agreement expires or is terminated with respect to all Products for a particular Target
in accordance with ARTICLE 8, then Section 2.10.1 shall not apply with respect to such Target. 
  

	 	2.11	Compliance with Law and Ethical Business Practices 

  

	 	2.11.1	Neither Party shall make any payment, either directly or indirectly, of money or other assets, including but not limited to the compensation such Party derives from this Agreement (hereinafter collectively referred as a
“Payment”), to government or political party officials, officials of international public organizations, candidates for public office, or representatives of other businesses or persons acting on behalf of any of the foregoing
(hereinafter collectively referred as “Officials”) where such Payment would constitute violation of any law. In addition regardless of legality, neither Party shall make any Payment either directly or indirectly to Officials if such
Payment is for the purpose of influencing decisions or actions with respect to the subject matter of this Agreement or any other aspect of such Party’s or the other Party’s business. 

 

	 	2.11.2	Each Party acknowledges that no employee of the other Party or its Affiliates shall have authority to give any direction, either written or oral, relating to the making of any commitment by such Party or its
agents to any Third Party in violation of terms of this Section 2.11. 

  
 - 29 - 

	 	2.11.3	Each Party certifies to the other Party that as of the date of this Agreement its officers and directors have not been in Violation. After the execution of this Agreement, each Party shall notify the other Party
in writing immediately if any such Violation occurs or comes to its attention. 

  

	 	2.11.4	Each Party shall indemnify and hold the other Party and any of its Affiliates harmless from and against any and all liabilities (including all costs and reasonable attorneys’ fees associated with defending against
such claims) that may arise by reason of the acts or omissions of it or its agents or other Third Parties acting on its behalf which would constitute a violation of this Section 2.11. 

 

	 	2.12	Regulatory Matters. In the event that Agensys determines that any regulatory filings for any Compounds or Products are required for any activities hereunder (including any activities under the Research
Program), including INDs, BLAs / NDAs, Drug Master Files (DMFs), and other Marketing Authorizations or foreign equivalents (as applicable), then as between the Parties, Agensys shall have the sole right, in its discretion, to obtain such regulatory
filings (in a Related Party’s name) and as between the Parties, the Related Party shall be the owner of all such regulatory filings; provided that Ambrx may be responsible at the direction of Agensys, in its sole discretion, for preparing
certain subsections of the IND and related technical reports and other documentation in support of the IND for certain Compounds and/or Products. As between the Parties, Agensys or the Related Party shall have the sole right to communicate and
otherwise interact with Regulatory Authorities with respect to the Compounds and/or Products (including during the Research Term). For clarity, Ambrx shall have no right to, and shall not, make any regulatory filings related to any Compounds or
Products or otherwise interact with any Regulatory Authorities with respect to the Compounds or Products. Notwithstanding the foregoing, Agensys shall provide Ambrx with copies those sections of all filings with Regulatory Authorities that reference
Ambrx Know-How or Ambrx Patent Rights, and copies of all material communications to or from Regulatory Authorities that reference Ambrx Know-How or Ambrx Patent Rights, in each case as soon as practicable, but in any event, within twenty
(20) Business Days prior to filing or within twenty (20) Business Days of receipt by Agensys. Agensys shall consult with Ambrx with respect to Ambrx Know-How or Ambrx-Patent Rights incorporated into any filings with Regulatory Authorities
and shall incorporate comments from Ambrx in its reasonable discretion. 

  

	 	2.13	Primary Activity of Compounds; Identification of Compounds and Back-up Compounds.  

  

	 	(a)	The Parties agree that, with respect to a Compound made under the Research Program, such Compound shall be presumed to have Primary Activity against an Active Selected Target in the Field under the Research Program
unless, during the Research Term, the JPT unanimously agrees in writing that such Compound does not have Primary Activity against any such Target in the Field. 

  

	 	(b)	 After achieving and following payment of the Research Milestone with respect to 

  
 - 30 - 

	 	
a Compound, during the Research Term, Agensys may, by written notice to Ambrx, nominate Back-up Compounds directed to the same Target to be pursued in the event that the lead Compound does not
merit continued development. Any research activities conducted by Agensys pursuant to the identification of Back-up Compounds shall not be deemed activities directed to an Active Selected Target. If Agensys does not nominate one or more Back-up
Compounds during the Research Term, no such Back-up Compounds may be nominated or pursued pursuant to the licenses granted hereunder thereafter. 

  

	 	(c)	At the end of the Research Term, the Parties shall set forth in writing a listing of all Compounds and Back-up Compounds and the Target against which they have Primary Activity. 

 

	 	2.14	UC Berkeley Technology. During the Research Term, Agensys shall have the option, in its sole discretion, to take a sublicense of the UC Berkeley Technology by providing written notice to Ambrx of its
desire to use the UC Berkeley Technology against one or more of the Active Selected Targets under the Research Program (such sublicense, the “UC Berkeley Sublicense”). In the event that Agensys delivers such notice (on behalf of
itself or one or more of its Affiliates), the Parties (or such Affiliate(s)) shall promptly work together to execute an agreement for the UC Berkeley Sublicense and shall use commercially reasonable efforts to enter into such agreement for the UC
Berkeley Sublicense; provided however, that in all cases, such agreement: (i) shall indicate whether the applicable Compound or Product is the “first Licensed Product” as set forth in the UC Berkeley License, (ii) shall indicate
that Ambrx shall be solely responsible for all obligations under the UC Berkeley License, provided that Agensys shall be responsible for reimbursing Ambrx for [***] of the royalty obligations and
milestone obligations, if applicable, due on said “Licensed Product” as defined in the UC Berkeley License, (iii) shall indicate that any royalty due to Ambrx under the UC Berkeley Sublicense shall include the applicable royalty
offset as set forth in Section 5.4.7(b) of this Agreement, and (iv) shall indicate that Agensys shall have no other financial obligations to Ambrx with respect to the UC Berkeley License. Notwithstanding the provisions of
Section 3.1.1, unless and until Agensys delivers such written notice, Ambrx shall not use any UC Berkeley Technology in the conduct of the Research Program, and following the delivery of such notice, Ambrx shall only use the UC Berkeley
Technology in the conduct of the Research Program pursuant to the UC Berkeley Sublicense. 

  

	 	2.15	Open Terminated Compounds/Products; Open Terminated Targets 

  

	 	(a)	Ambrx shall have the right to conduct research, development and/or commercialization only on Open Terminated Compounds (and related Terminated Products) or Open Terminated Targets. No such rights shall exist with
respect to Agensys Terminated Compounds or Agensys Terminated Targets. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
31 - 

	 	(b)	Agensys shall return or cause to be returned to Ambrx all Confidential Information and all substances or compositions of Ambrx delivered or provided by Ambrx, as well as any other material (including Materials)
provided by Ambrx in any medium under the Research Program and related to the Open Terminated Target, Open Terminated Compound(s) and/or Open Terminated Product(s) (provided, however, that Agensys may keep one copy of such Confidential Information
of Ambrx in its confidential files for record purposes). 

 ARTICLE 3 

LICENSE; DEVELOPMENT AND COMMERCIALIZATION 
  

	 	3.1	License Grant 

  

	 	3.1.1	By Ambrx. 

 Research Program Licenses 

 

	 	(a)	Subject to the rights retained by Ambrx in Section 3.1.1(c) and the terms and conditions of this Agreement, Ambrx hereby grants to Agensys an exclusive license (even as to Ambrx) to carry out the activities
in the Research Program during the Research Term in the Territory in the Field under Ambrx Patent Rights, with the right to sublicense as set forth in Section 3.4.1. 

 

	 	(b)	Subject to the rights retained by Ambrx in Section 3.1.1(c) and the terms and conditions of this Agreement, Ambrx hereby grants to Agensys an exclusive license (even as to Ambrx) to carry out the activities in the
Research Program during the Research Term in the Territory in the Field under Ambrx Know-How, with the right to sublicense as set forth in Section 3.4.1. 

  

	 	(c)	Ambrx shall retain non-exclusive rights under the foregoing licenses in clauses (a) and (b) solely as are necessary to perform its activities under the Research Program to research, make and use
Compounds as set forth in the Research Plan in accordance with this Agreement. 

 Development, Manufacturing and
Commercialization Licenses 
  

	 	(d)	Subject to the rights retained by Ambrx in Section 3.1.1(f) and the terms and conditions of this Agreement, Ambrx hereby grants to Agensys an exclusive license (even as to Ambrx) in the Territory under the
Ambrx Patent Rights, with the right to sublicense as set forth in Section 3.4.1, to research, develop, make, have made, use, offer to sell, sell, export and/or import Compounds and Products for any and all diagnostic, preventative and
therapeutic uses in humans. For clarity, if the Research Milestone for the applicable Target is not paid to Ambrx prior to the end of the Research Term, the license granted under this Section 3.1.1(d) shall terminate as to all Compounds and
Products with Primary Activity against such Target. 

  
 - 32 - 

	 	(e)	Subject to the rights retained by Ambrx in Section 3.1.1(f) and the terms and conditions of this Agreement, Ambrx hereby grants to Agensys an exclusive license (even as to Ambrx) in the Territory under the
Ambrx Know-How, with the right to sublicense as set forth in Section 3.4.1, to research, develop, make, have made, use, offer to sell, sell, export and/or import Compounds and Products directed to Active Selected Targets and Commercial Targets
for any and all diagnostic, preventative and therapeutic uses in humans. For clarity, if the Research Milestone for the applicable Target is not paid to Ambrx prior to the end of the Research Term, the license granted under this
Section 3.1.1(e) shall terminate as to all Compounds and Products with Primary Activity against such Target. 

  

	 	(f)	Ambrx shall retain non-exclusive rights under the foregoing licenses in clauses (d) and (e) solely as are necessary to perform its activities under the Research Program to research, make and use
Compounds as set forth in the Research Plan in accordance with this Agreement. 

  

	 	3.1.2	By Agensys. 

 Research Program Licenses 

 

	 	(a)	If Agensys requests Ambrx to perform activities under the Research Program that require a license under any Agensys Patent Rights or Agensys Know-How, Agensys hereby grants a non-exclusive, non-transferable,
non-sublicensable, royalty free, license to Ambrx under such Agensys Patent Rights or Agensys Know-How, as applicable, solely as are necessary to perform such activities under the Research Program. 

 

	 	3.2	No Grant of Inconsistent Rights by Ambrx. 

 During the Term, Ambrx shall not
assign, transfer, convey or otherwise grant to any Person, or otherwise encumber (including through lien, charge, security interest, mortgage, encumbrance or otherwise), any rights to any Ambrx Know-How or Ambrx Patent Rights (or any rights to any
intellectual property that would otherwise be included in the Ambrx Know-How or Ambrx Patent Rights) in any manner that is inconsistent with or would interfere with the exercise of the rights or licenses granted to Agensys hereunder. 

 

	 	3.3	No Implied Licenses 

 Except as specifically and expressly set forth in this
Agreement, neither Party shall acquire any license or other intellectual property interest, by implication or otherwise, in any Confidential Information disclosed to it under this Agreement, know how or under any patents or patent applications owned
or Controlled by the other Party or its Affiliates. 

  
 - 33 - 

	 	3.4	Sublicensing. 

  

	 	3.4.1	By Agensys. Except as expressly provided in Section 10.18, prior to the end of the Research Term, Agensys may not sublicense any of the licenses granted under Section 3.1.1(a) or 3.1.1(b) for the
conduct of activities under the Research Program without the prior written consent of Ambrx (such consent not to be unreasonably withheld); provided that Agensys shall have the right to sublicense (through multiple tiers) such licenses without the
consent of Ambrx, (a) to a Third Party contract manufacturer to make or have made Compound and Product in the Field in the Territory on behalf of Agensys, or (b) to a Third Party for the limited purpose of conducting one or more aspects of
the research or development contemplated under the Research Program under this Agreement, or (c) to any Affiliate. With respect to the licenses granted under Section 3.1.1(d) and 3.1.1(e), Agensys shall have the right to sublicense
(through multiple tiers) any or all of the rights granted to Agensys thereunder following the end of the Research Term (and, for clarity, then without the prior written consent of Ambrx). Notwithstanding the foregoing, nothing in this Section shall
limit or otherwise restrict any rights of Agensys as set forth in Section 10.18. 

 With respect to any sublicense to a
Third Party, the following shall apply: (i) Agensys shall ensure that each of its Third Party sublicensees is bound by a written agreement that is consistent with, and subject to the applicable terms and conditions of, this Agreement,
(ii) Agensys shall be responsible for ensuring that the performance by any of its Third Party sublicensees that are exercising rights under a sublicense of the licenses granted by Ambrx to Agensys under this Agreement is in accordance with the
applicable terms of this Agreement with respect to the applicable activities to be performed by such sublicensee, and the grant of any such sublicense shall not relieve Agensys of its obligations under this Agreement, except to the extent they are
performed by any such sublicensee(s) in accordance with this Agreement and (iii) promptly following the execution of each sublicense with a Third Party as provided in this Section 3.4.1, Agensys shall provide Ambrx with a copy of such
sublicense agreement; provided that the financial terms of any such sublicense agreement may be redacted. 
  

	 	3.4.2	 By Ambrx. Ambrx shall have the right to sublicense any or all of the licenses granted under Section 3.1.2 provided that, in
connection with any sublicense, (i) Ambrx shall ensure that each of its sublicensees is bound by a written agreement that is consistent with, and subject to the applicable terms and conditions of, this Agreement, (ii) Ambrx shall be
responsible for ensuring that the performance by any of its sublicensees that are exercising rights under a sublicense of the licenses granted by Agensys to Ambrx under this Agreement is in accordance with the applicable terms of this Agreement with
respect to the applicable activities to be performed by such sublicensee, and the grant of any such sublicense shall not relieve Ambrx of its obligations under this Agreement, except to the extent they are performed by any such sublicensee(s) in
accordance with this Agreement and (iii) promptly following the execution of each sublicense as provided in this 

  
 - 34 - 

	 	
Section 3.4.2, Ambrx shall provide Agensys with a copy of such sublicense agreement; provided that the financial terms of any such sublicense agreement may be redacted.

  

	 	3.5	Development, Manufacture and Commercialization 

  

	 	3.5.1	Development by Agensys following Achievement of the Research Milestone. Notwithstanding Section 3.5.2, no Related Party may initiate an IND-Enabling Pharmacology and Toxicology Study unless the
Research Milestone for such Target has previously been paid by Agensys. 

  

	 	3.5.2	Compounds and Products By Agensys. Subject to the terms and conditions of this Agreement, Agensys (and its Affiliates), either itself or together with Third Parties, shall have the sole right, at its
expense, to research, develop (including pre-clinical and clinical development), manufacture, register and commercialize Compounds and Products containing such Compounds against any and all Commercial Targets, and Ambrx (and its Affiliates) shall
have no right to do so. Agensys shall use Commercially Reasonable Efforts to develop and commercialize at least one Product in the Field in each of the Major Markets. All other development and commercialization efforts with respect to the Compounds
and Products shall be at the discretion of Agensys. 

 Upon expiration of the Research Term, and once per year thereafter
until the First Commercial Sale of a Product, Agensys shall provide Ambrx with a written report that summarizes the development progress and plans for such Product and the related Compound. 

 

	 	3.5.3	Open Terminated Compounds and Open Terminated Products. Each of Ambrx and Agensys (together with their respective Affiliates), either itself or together with Third Parties, shall have the right, at its
expense, to develop (including pre-clinical and clinical development), manufacture, register and commercialize any Open Terminated Compounds (if any) and Open Terminated Products (if any) and to pursue such activities against any Open Terminated
Target. For clarity, (a) all rights or licenses granted to Agensys by Ambrx in any Ambrx Know-How, Ambrx Patent Rights or any other intellectual property of Ambrx shall terminate as to Open Terminated Compounds, Open Terminated Products and/or
Open Terminated Targets once such Compounds, Products and/or Targets become Open Terminated Compounds, Open Terminated Products and/or Open Terminated Targets and (b) Agensys is not granting any rights or licenses to Ambrx in any Agensys
Know-How, Agensys Patent Rights or any other intellectual property of Agensys or any of its Affiliates for use with such Open Terminated Compounds, Open Terminated Products and/or Open Terminated Targets. 

 

	 	3.6	Excused Performance 

 In addition to the provisions of ARTICLE 6 hereof, the
obligations of Agensys with respect to any Product under Section 3.5.1 are expressly conditioned upon the continuing 

  
 - 35 - 

 
absence of any adverse condition or event relating to the safety or efficacy of the Product, and the obligation of Agensys to develop or commercialize any such Product may be delayed or suspended
so long as in Agensys’ reasonable, good-faith opinion any such condition or event exists. 
 ARTICLE 4 

CONFIDENTIALITY AND PUBLICATION 
  

	 	4.1	Nondisclosure Obligation 

 All Confidential Information disclosed by one Party to
the other Party hereunder shall be maintained in confidence by the receiving Party and shall not be disclosed to any Third Party or used for any purpose except as set forth herein without the prior written consent of the disclosing Party, except to
the extent that such Confidential Information: 
  

	 	(a)	is known by the receiving Party at the time of its receipt, and not through a prior disclosure by the disclosing Party, as documented by the receiving Party’s competent business records; 

 

	 	(b)	is in the public domain by use and/or publication before its receipt from the disclosing Party, or thereafter enters the public domain through no fault of the receiving Party; 

 

	 	(c)	is subsequently disclosed to the receiving Party by a Third Party who may lawfully do so and is not under an obligation of confidentiality to the disclosing Party; 

 

	 	(d)	is developed by the receiving Party independently of Confidential Information received from the disclosing Party, as documented by the receiving Party’s competent business records; 

 

	 	(e)	is disclosed to governmental or other regulatory agencies in order to obtain patents or to gain or maintain approval to conduct clinical trials or to market Product, but such disclosure may be only to the extent
reasonably necessary to obtain patents or authorizations; 

  

	 	(f)	is deemed necessary by Agensys to be disclosed to Related Parties, agents, consultants, and/or other Third Parties for any and all purposes Agensys and its Affiliates deem necessary or advisable in the ordinary
course of business in accordance with this Agreement (including the exercise of licenses granted to Agensys hereunder) on the condition that such Third Parties agree to be bound by confidentiality and non-use obligations that substantially are no
less stringent than those confidentiality and nonuse provisions contained in this Agreement; provided, however, that the term of confidentiality for such Third Parties shall be no less than five (5) years; or 

  
 - 36 - 

	 	(g)	is deemed necessary by counsel to the receiving Party to be disclosed to such Party’s attorneys, independent accountants or financial advisors for the sole purpose of enabling such attorneys, independent
accountants or financial advisors to provide advice to the receiving Party, on the condition that such attorneys, independent accountants and financial advisors agree to be bound by the confidentiality and non-use obligations no less protective than
those set forth in this Agreement; provided, however, that the term of confidentiality for such attorneys, independent accountants and financial advisors shall be no less than five (5) years. 

 

	 	(h)	in connection with a financing, merger, or acquisition, each Party shall have the further right to disclose the material terms of this Agreement under a confidentiality obligation no less protective than those
set forth in this Agreement. 

  

	 	(i)	the Parties shall agree in advance with each other on the terms of this Agreement to be redacted in any Securities and Exchange Commission filings or any foreign equivalent regulatory filings. 

Any combination of features or disclosures shall not be deemed to fall within the foregoing exclusions merely because individual features are
published or available to the general public or in the rightful possession of the receiving Party unless the combination itself and principle of operation are published or available to the general public or in the rightful possession of the
receiving Party. 
 If a Party is required by judicial or administrative process to disclose Confidential Information that is subject to the
non-disclosure provisions of this Section 4.1, such Party shall promptly inform the other Party of the disclosure that is being sought in order to provide the other Party an opportunity to challenge or limit the disclosure obligations.
Confidential Information that is disclosed by judicial or administrative process shall remain otherwise subject to the confidentiality and non-use provisions of this Section 4.1, and the Party disclosing Confidential Information pursuant to
Applicable Law or court order shall take all steps reasonably necessary, including obtaining an order of confidentiality, to ensure the continued confidential treatment of such Confidential Information. 

 

	 	4.2	Publication 

 Agensys and Ambrx each acknowledge the other Party’s interest
in publishing the results of its research in order to obtain recognition within the scientific community and to advance the state of scientific knowledge. Each Party also recognizes the mutual interest in obtaining valid patent protection and in
protecting business interests and trade secret information. Consequently, except for disclosures permitted pursuant to Section 4.1, either Party, its employees or consultants wishing to make a publication with respect to the research under the
Research Program hereunder shall deliver to the other Party a copy of the proposed written publication or an outline of an oral disclosure at least sixty (60) days prior to submission for publication or presentation. The reviewing Party shall
have the right (a) to propose modifications to the publication or presentation for patent reasons, 

  
 - 37 - 

 
trade secret reasons or business reasons or (b) to request a reasonable delay in publication or presentation in order to protect patentable information. If the reviewing Party requests a
delay, the publishing Party shall delay submission or presentation for a period of one hundred and twenty (120) days to enable patent applications protecting each Party’s rights in such information to be filed in accordance with ARTICLE 7
below. Upon expiration of such one hundred and twenty (120) days, the publishing Party shall be free to proceed with the publication or presentation. If the reviewing Party requests modifications to the publication or presentation, the
publishing Party shall edit such publication to prevent disclosure of trade secret or proprietary business information prior to submission of the publication or presentation. 
  

	 	4.3	Publicity/Use of Names 

 No disclosure of the existence, or the terms, of this
Agreement may be made by either Party, and neither Party shall use the name, trademark, trade name or logo of the other Party, its Affiliates or their respective employees in any publicity, promotion, news release or disclosure relating to this
Agreement or its subject matter, without the prior express written permission of the other Party, except as may be required by Applicable Law or as permitted pursuant to Section 4.1; provided that in the event disclosure is required by
Applicable Law, the disclosing Party shall use good-faith efforts to give the non-disclosing Party an opportunity, with reasonable advance notice, to review and comment on any proposed disclosure. Notwithstanding the foregoing, Ambrx shall have the
right to issue a press release regarding the execution of this Agreement, which press release shall be in a form agreed to by the Parties in writing in advance of the issuance of such press release. Disclosure of Confidential Information for which
consent has previously been obtained will not require advance approval. 
  

	 	4.4	Clinical Trial Register 

 Notwithstanding the foregoing, Agensys shall have the
right to publish the results or summaries of results of any clinical trials conducted hereunder with respect to a Product on Agensys’ clinical trial register, if applicable. 

 

	 	4.5	Remedies 

 Each Party shall be entitled to seek, in addition to any other right or
remedy it may have, at law or in equity, a temporary injunction, without the posting of any bond or other security, enjoining or restraining the other Party from any violation or threatened violation of this ARTICLE 4. 

ARTICLE 5 
 PAYMENTS;
ROYALTIES AND REPORTS 
  

	 	5.1	Upfront Payment and Initial Year of Research Program Funding 

 In consideration
for Ambrx’s performance of its obligations under the Research Program, the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How and 

  
 - 38 - 

 
the provision by Ambrx of availability of at least four (4) FTEs for the first twelve (12) months of the Research Term, upon the terms and conditions contained herein, Agensys shall pay
to Ambrx, within fifteen (15) days following the Effective Date, an upfront payment in the amount of Fifteen Million Dollars ($15,000,000), which shall be non-refundable and non-creditable. 

 

	 	5.2	FTE Funding under the Research Program 

  

	 	5.2.1	General. 

  

	 	(a)	In consideration for Ambrx’s provision of FTEs for the performance of its obligations under the Research Program, upon the terms and conditions contained herein, Agensys (i) shall pay Ambrx the
applicable FTE Rate per year for any FTEs in excess of four (4) FTEs provided by Ambrx in the first year of the Research Term and the applicable FTE Rate per year during the second, third and fourth years of the Research Term for each FTE
provided by Ambrx, in each case in accordance with this Section 5.2 (it being acknowledged that Agensys has pre-paid the applicable FTE Rate for four (4) FTEs for the initial year pursuant to Section 5.1) and (ii) shall reimburse
Ambrx for its direct, out-of-pocket research costs incurred by Ambrx for a Third Party contractor during the entire Research Term solely to perform research activities under the Research Program pursuant to the Research Plan (“Third Party
Research Costs”) in accordance with this Section 5.2. 

  

	 	(b)	The number of FTEs to be provided by Ambrx for the performance of the Research Program per year shall be set forth in the applicable Research Plan; provided, however, that the JPT shall have the right to revise
the number of FTEs in accordance with Section 2.1.5. Such FTE funding shall be payable in advance in quarterly installments due on the first day of the applicable Calendar Quarter; provided, however, that the payments for the first Calendar
Quarter and the last Calendar Quarter of the Research Term shall be made on a pro rata basis. 

  

	 	(c)	 The amount of any Third Party Research Costs which will be reimbursed by Agensys shall be expressly set forth in the Research Plan (and the
Research Plan shall also identify whether a Third Party contractor will perform the applicable activities under the Research Plan and the activities to be performed by any such Third Party contractor). At the end of each Calendar Quarter during the
Research Term, Ambrx shall invoice Agensys for the Third Party Research Costs incurred during such Calendar Quarter to the extent that such Third Party Research Costs were expressly set forth in the Research Plan. Agensys shall pay such invoiced
amounts within thirty (30) days of receipt of the invoice. Notwithstanding the foregoing, Agensys shall only be obligated to reimburse Ambrx for those Third Party Research Costs which are expressly agreed to by the Parties and set forth in the
Research Plan (including with respect to the amount of such Third Party Research Costs and with respect to the activities to be performed by the applicable Third Party contractor) and Ambrx shall be solely responsible for (and

  
 - 39 - 

	 	
shall not be entitled to reimbursement for) any other costs, including any costs in excess of such agreed upon amount or any costs not directly related to the performance of activities under the
Research Plan or any costs not approved by the JPT. 

  

	 	5.2.2	Funding under MTAs. In consideration for Ambrx’s provision of FTEs for the performance of its obligations under an MTA, upon the terms and conditions contained herein, Agensys (i) shall pay Ambrx
the applicable FTE Rate per year for each FTE provided by Ambrx under such MTA which exceeds the FTEs already being allocated under the Research Program and (ii) shall reimburse Ambrx for its direct, out-of-pocket research costs incurred by
Ambrx for a Third Party contractor as agreed by the JPT in connection with such MTA (“Third Party MTA Research Costs”). The number of FTEs to be provided by Ambrx under an MTA shall be set forth in the applicable MTA but shall be
subject to Section 2.1.6. Such FTE funding shall be payable in advance in quarterly installments due on the first day of the applicable Calendar Quarter; provided, however, that the payments for the first Calendar Quarter and the last Calendar
Quarter of the applicable MTA shall be made on a pro rata basis. 

 The amount of any Third Party MTA Research Costs which
will be reimbursed by Agensys shall be agreed by the JPT. At the end of each Calendar Quarter during the Research Term, Ambrx shall invoice Agensys for the Third Party MTA Research Costs incurred during such Calendar Quarter. Agensys shall pay such
invoiced amounts within thirty (30) days of receipt of the invoice. For clarity, Ambrx shall be solely responsible for (and shall not be entitled to reimbursement for) any Third Party costs in connection with the MTA not agreed by the JPT. 

 

	 	5.2.3	 Reporting and Reconciliation. Ambrx shall, within forty-five (45) days following the end of each Calendar Quarter during the
Research Term, deliver to Agensys a written report detailing the number of FTEs actually utilized in such Calendar Quarter for the performance of Research Program activities and MTA activities, including a description of the activities performed
(and Agensys shall have the right to audit Ambrx’s records in connection therewith in accordance with Section 5.6, mutatis mutandis). In the event that the number of FTEs actually utilized in such Calendar Quarter is less than the
number of FTEs for which Agensys made payment in advance pursuant to Section 5.1, 5.2.1, or 5.2.2, then at Agensys’ option, Ambrx shall either refund or credit Agensys for the difference between the payment made by Agensys and the actual
payment due for such FTEs (provided that if Agensys opts for a refund, such refund shall be made by Ambrx within thirty (30) days following notice by Agensys thereof and if Agensys opts for a credit, Agensys shall be entitled to a credit
against any future FTE amounts payable by Agensys pursuant to this Section 5.2). For clarity, in no event shall Ambrx be entitled to receive payment for (and Ambrx shall be solely responsible for) any and all FTEs in a given Calendar Quarter
which are in excess of the number of FTEs authorized to be utilized to conduct the Research Program activities in such Calendar Quarter as set forth in the Research Plan, an MTA or 

  
 - 40 - 

	 	
as otherwise expressly approved in writing by the JPT. In all events Ambrx shall be entitled to receive payment for at least two (2) FTEs in a given Calendar Quarter. 

 

	 	5.2.4	Elimination of FTEs. Notwithstanding anything to the contrary in this Section 5.2, in the event that the Parties or the JPT determines to reduce the number of FTEs for the conduct of Research Program
and MTA activities from those set forth in the Research Plan to no less than two (2) FTEs (each, an “Eliminated FTE”), then Agensys shall only be required to fund such reduced number of FTEs in accordance with the provisions of
this Section 5.2; provided, however, that to the extent that Ambrx is unable to reassign (after using Commercially Reasonable Efforts) such Eliminated FTEs to other activities under the Research Program hereunder or to other activities at
Ambrx, then, for a period not to exceed one hundred twenty (120) days, Agensys shall continue to fund such Eliminated FTEs in accordance with this Section 5.2 (provided that for clarity, after such one hundred twenty (120)-day period,
Agensys shall no longer be required to fund such Eliminated FTEs). 

  

	 	5.3	Milestone Payments 

  

	 	5.3.1	Research Milestone. In consideration of the licenses granted herein under the Ambrx Patent Rights and the Ambrx Know-How and subject to the terms and conditions contained herein, Agensys shall pay to Ambrx [***],
which shall be non-refundable and shall be non-creditable, with respect to each Active Selected Target for which Ambrx [***] (the “Research Milestone”). For clarity, the Research Milestone shall be payable only one (1) time for
a given Active Selected Target upon the initial achievement of the Research Milestone and no amounts shall be due hereunder for subsequent or repeated achievement of such Research Milestone for such Active Selected Target (e.g., achievement
of the same Research Milestone for separate Compounds would not trigger separate Research Milestone payments). 

  

	 	5.3.2	Development and Commercialization Milestones. In consideration for the licenses granted herein under the Ambrx Patent Rights and the Ambrx Know-How and subject to the terms and conditions contained herein,
Agensys shall pay to Ambrx the following amounts, which shall be non-refundable and shall be non-creditable, with respect to each Commercial Target for which Agensys achieves the following milestone event during the Term (the
“Development/Commercial Milestones”): 

  

					
	 Event
	  	Payment
Amount	 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
41 - 

					
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 
	 [***]
	  	 	[***	] 

 [***] For clarity, each of the foregoing Development/Commercial Milestones in this Section 5.3.2
shall be payable only one (1) time for a given Commercial Target upon the initial achievement of the applicable Development/Commercial Milestone and no amounts shall be due hereunder for subsequent or repeated achievement of such
Development/Commercial Milestone for such Commercial Target (e.g., achievement of the same Development/Commercial Milestones for separate Compounds or Products for such Commercial Target would not trigger separate Development/Commercial
Milestone payments). In addition, in the event that a prior Research Milestone or Development Milestone has not been paid for a given Commercial Target, and a subsequent Development Milestone is achieved for such Commercial Target, then all such
unpaid prior Research Milestones and Development Milestones for such Commercial Target shall be paid simultaneously with the payment of such subsequent Development/Commercial Milestone which is achieved (by way of example, (i) if Development
Milestone 2 is achieved for a given Target and the Research Milestone or Development Milestone 1 has not been paid with respect to such Target, then such Research Milestone and Development Milestone 1 shall be paid simultaneously with the payment of
Development Milestone 2, and (ii) if [***], and so on with respect to each of the Development/Commercial Milestones of a given Target); provided, however, that in all cases, the Research Milestones and all Development/Commercialization
Milestones shall be payable only one (1) time for a given Commercial Target. 
  

	 	5.3.3	Sales Milestones. In consideration for the licenses granted herein under the Ambrx Patent Rights and Ambrx Know-How and subject to the terms and conditions contained herein, Agensys shall pay to Ambrx the
following amounts, which shall be non-refundable and shall be non-creditable, with respect to each Commercial Target for which Agensys achieves the following milestone event during the Term: 

 

					
	 Event
	  	Payment
Amount	 
	 First achievement of aggregate Net Sales in the Territory of all Products in the Territory for use against the applicable Target in a
given Calendar Year exceeding [***] for such Calendar Year
	  	 	[***	] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
42 - 

					
	 First achievement of aggregate Net Sales in the Territory of all Products for use against the applicable Target in a given Calendar
Year exceeding [***] for such Calendar Year
	  	 	[***	] 

 For clarity, each of the foregoing milestones in this Section 5.3.3 shall be payable only one
(1) time for each such Commercial Target upon the initial achievement of the applicable milestone and no amounts shall be due hereunder for subsequent or repeated achievement of such milestone. 

 

	 	5.3.4	Reporting and Payment. Agensys shall notify Ambrx in writing within thirty (30) days following the achievement of each milestone as set forth in Section 5.3.1, 5.3.2 or 5.3.3, as applicable, and
shall make the appropriate milestone payment within thirty (30) days after the achievement of such milestone. 

  

	 	5.4	Royalties 

  

	 	5.4.1	Royalties Payable By Agensys. Subject to the terms and conditions of this Agreement, Agensys shall pay Ambrx royalties as set forth in this Section 5.4. 

 

	 	5.4.2	Patent Royalties. Agensys shall pay Ambrx royalties in an amount equal to the following percentage of Net Sales of Royalty Products sold by the Related Parties in countries within the Territory where the
manufacture, use, or sale of a Royalty Product by Agensys or its Related Party would infringe a Valid Patent Claim: 

  

	 	(a)	[***] of such Net Sales in the Territory in each Calendar Year up to and including Net Sales of [***]; 

  

	 	(b)	[***] of such Net Sales in the Territory in each Calendar Year for the portion of such Net Sales exceeding [***] up to and including [***]; and 

 

	 	(c)	[***] of such Net Sales in the Territory in each Calendar Year for the portion of such Net Sales exceeding [***]. 

The foregoing royalty tiers shall be determined on a Target-by-Target basis. As a result, for purposes of determining the foregoing royalty
tiers under this Section 5.4.2, Net Sales of all Royalty Products for a given Target shall be aggregated, subject to Section 5.4.6. If a given Product could be used for more than one Target, then Net Sales of such Product shall only be
used to determine royalties for one (1) Target as determined by Agensys. For clarity, (x) only Net Sales of those Royalty Products for a given Target for which a royalty is payable in a given country in a given Calendar Year under this
Section 5.4.2 or Section 5.4.3, as applicable shall be included in determining such tiers and (y) Net Sales of Royalty Products for a given Target will not be combined with Net Sales of 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
43 - 

 
Royalty Products for any other Target for purposes of determining the foregoing royalty tiers. 
  

	 	5.4.3	Know-How Royalty. Notwithstanding the provisions of Section 5.4.2 above, in countries in the Territory where the manufacture, use or sale of a Royalty Product by Agensys or its Related Parties would
not infringe a Valid Patent Claim, the Net Sales of such Royalty Product(s) in such countries shall be halved in determining the applicable royalty rate according to Section 5.4.2. 

 

	 	5.4.4	Royalty Term; Additional Conditions. Royalties on a given Royalty Product at the rates set forth above shall commence with the First Commercial Sale of the Royalty Product and continue on a
country-by-country basis until the expiration of the later of: (i) the last-to-expire Valid Patent Claim that would be infringed by the manufacture, use or sale of such Royalty Product in such country; or (ii) the period of ten
(10) years following the First Commercial Sale of such Royalty Product in such country (the “Royalty Term”). Notwithstanding anything to the contrary contained herein, all royalties are subject to the following conditions:

  

	 	(i)	that only one royalty shall be due with respect to the same unit of Royalty Product; 

  

	 	(ii)	that no royalties shall be due upon the sale or other transfer among the Related Parties, but in such cases royalties shall be due and calculated upon Agensys’ or its Related Party’s Net Sales to the first
independent Third Party; 

  

	 	(iii)	that no royalties shall accrue on the sale or other disposition of Product by the Related Parties for use in a Clinical Trial; 

  

	 	(iv)	that no royalties shall accrue on the disposition of Royalty Product in reasonable quantities by Agensys or its Related Parties as samples (promotion or otherwise) or as donations (for example, to non-profit
institutions or government agencies for a non commercial purpose); 

  

	 	(v)	that the determination of whether a royalty will be calculated under Section 5.4.2 or 5.4.3 shall be determined on a Royalty Product-by-Royalty Product and country-by-country basis, provided that for clarity, with
respect to a given Royalty Product, the Net Sales of such Royalty Product under Section 5.4.2 and 5.4.3 shall be aggregated for purposes of determining the applicable royalty tiers under Section 5.4.2 or 5.4.3, as applicable; and

  

	 	(vi)	that no royalties shall be payable by Agensys on any Products other than Royalty Products. 

  

	 	(vii)	 that once a Biosimilar for a particular Product is launched in a country within the Territory, then the royalty rate paid on Net Sales in such

  
 - 44 - 

	 	
country as provided in Section 5.4.2 or 5.4.3, as applicable, shall be reduced by [***]. For purposes of this Section 5.4.4,
“Biosimilar” shall mean an antibody drug conjugate with primary activity to the same Target as the applicable Product that has a payload technology that uses the same mechanism of action and is conjugated to the Antibody in a site
specific fashion to a non-natural amino acid. 

  

	 	5.4.5	Royalties for Bulk Compound. In those cases in which Agensys sells bulk Compound rather than Product in packaged form to an independent Third Party, the royalty obligations of this Section 5.4 shall
be applicable to the bulk Compound (but solely to the extent that a royalty would otherwise be payable on the Product incorporating such Compound). 

  

	 	5.4.6	Compulsory Licenses. If a compulsory license is granted to a Third Party with respect to Royalty Product in any country in the Territory with a royalty rate lower than the royalty rate provided by
Section 5.4.2 or 5.4.3, as applicable, then the royalty rate to be paid by Agensys on Net Sales in that country under Section 5.4.2 or 5.4.3, as applicable, shall be reduced to the rate paid by the compulsory licensee. In such case, the
Net Sales which is subject to the royalty reduction as stipulated in this section 5.4.6 shall be excluded from the calculation of the royalty rate in Section 5.4.2. 

 

	 	5.4.7	Third Party Licenses. 

  

	 	(a)	In the event that Agensys determines that one or more licenses under any Patent Rights or know-how Controlled by Regeneron Pharmaceuticals, Inc. (“Regeneron”) are required by Agensys or its
Related Parties in order to make, have made, use, offer to sell, sell, export or import an Antibody (hereinafter “Regeneron Licenses”), then [***] of the royalty consideration (excluding, without limitation, upfront payments,
license fees and milestone payments) actually paid under such Regeneron Licenses by Agensys or its Related Parties for the manufacture, use or sale, as applicable, of such Antibody in a country for a given Calendar Quarter shall be creditable
against the royalty payments due Ambrx by Agensys with respect to the sale of Compound or Products containing such Antibody in such country. 

  

	 	(b)	In the event that Agensys determines that one or more licenses under any Patent Rights or know-how from Third Parties (other than Regeneron) are reasonably required by Agensys or its Related Parties in order to make,
have made, use, offer to sell, sell, export or import Compound or Product(s) (hereinafter, together with the UC Berkeley License, “Additional Third Party Licenses”), then [***] of the consideration (including upfront
payments, licenses fees and royalties, but excluding 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
45 - 

	 	
milestone payments) actually paid under such Additional Third Party Licenses by Agensys or its Related Parties for the manufacture, use or sale, as applicable, of such Compound or Product in a
country for a given Calendar Quarter shall be creditable against the royalty payments due Ambrx by Agensys with respect to the sale of such Compound or Products in such country; provided, however, that patent or know-how licenses relating to
(i) formulation technology, (ii) delivery device technology or (iii) manufacturing process used in the manufacture of the Compounds and/or Products (in each case, of (i), (ii) and/or (iii), as applicable, not related to any Ambrx
Know-How or Ambrx Patent Rights) shall not constitute Additional Third Party Licenses for purposes of this Section 5.4.7. 

  

	 	(c)	In no event shall the royalties owed by Agensys to Ambrx for any Calendar Quarter in any country be reduced by more than [***] pursuant to this
Section 5.4.7; provided, however, that if Agensys is not able to fully recover the amounts paid by Agensys or its Related Parties under Regeneron Licenses and Additional Third Party Licenses as a result of the foregoing restriction, then
Agensys shall be entitled to carry forward such right of off-set to future Calendar Quarters with respect to such excess amount. 

  

	 	5.5	Reports; Payment of Royalty 

 During the Term following the First Commercial Sale
of a Product, Agensys shall furnish to Ambrx a quarterly written report for the Calendar Quarter showing the Net Sales of all Royalty Products subject to royalty payments sold by the Related Parties in the Territory during the reporting period and
the royalties payable under this Agreement. Reports shall be due on the forty-fifth (45th) day following the close of each Calendar Quarter. Royalties shown to have accrued by each royalty report shall be due and payable on the date such
royalty report is due. the Related Parties shall keep complete and accurate records in sufficient detail to enable the royalties payable hereunder to be determined. 
  

	 	5.6	Audits 

  

	 	(a)	 Upon the written request of Ambrx and not more than once in each Calendar Year, Agensys shall permit an independent certified public
accounting firm of nationally recognized standing selected by Ambrx and reasonably acceptable to Agensys, at Ambrx’s expense, to have access during normal business hours to such of the records of the Related Parties as may be reasonably
necessary to verify the accuracy of the royalty reports hereunder for any Calendar Year ending not more than thirty six (36) months prior to the date of such request. The accounting firm shall disclose to Ambrx only whether the royalty reports
are  

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
46 - 

	 	
correct or incorrect and the amount of any discrepancy. No other information shall be provided to Ambrx. 

  

	 	(b)	If such accounting firm identifies a discrepancy made during such period, the appropriate Party shall pay the other Party the amount of the discrepancy within thirty (30) days of the date Ambrx delivers to
Agensys such accounting firm’s written report so concluding, or as otherwise agreed upon by the Parties. The fees charged by such accounting firm shall be paid by Ambrx; provided, however, that if such audit uncovers an underpayment of
royalties by Agensys that exceeds [***] of the total royalties owed for the period in question, the fees of such accounting firm shall be paid by Agensys. 

 

	 	(c)	Agensys shall include in each sublicense granted by it pursuant to this Agreement a provision requiring the sublicensee to make reports to Agensys, to keep and maintain records of sales made pursuant to such
sublicense and to grant access to such records by Ambrx’s independent accountant to the same extent required of Agensys under this Agreement. 

  

	 	(d)	Upon the expiration of thirty six (36) months following the end of any Calendar Year, the calculation of royalties payable with respect to such Calendar Year shall be binding and conclusive upon Ambrx, and Agensys
and its Related Parties shall be released from any liability or accountability with respect to royalties for such Calendar Year. 

  

	 	(e)	Ambrx shall treat all financial information subject to review under this Section 5.6 or under any sublicense agreement in accordance with the confidentiality and non-use provisions of this Agreement, and shall
cause its accounting firm to enter into an acceptable confidentiality agreement with Agensys and/or its Related Parties obligating it to retain all such information in confidence pursuant to such confidentiality agreement. 

 

	 	5.7	Payment Exchange Rate 

 All payments to be made by Agensys to Ambrx under this
Agreement shall be made in United States dollars and may be paid by bank wire transfer in immediately available funds to such bank account in the United States as may be designated in writing by Ambrx from time to time. In the case of sales outside
the United States, the rate of exchange to be used in computing the monthly amount of currency equivalent in United States dollars due Ambrx shall be made at the average T.T.M. rate published by the Bank of Tokyo Mitsubishi UFJ, Ltd. in Japan for
the first and last Business Day of the applicable reporting period for the payment due, consistent with Agensys’ normal practices. 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 
 -
47 - 

	 	5.8	Tax Withholding  

 Ambrx shall be liable for all income and/or other taxes
(including interest) imposed upon any payments (“Payments”) made by Agensys to Ambrx under this ARTICLE 5 (“Taxes”). In the event Applicable Laws require withholding of Taxes, Agensys shall make such withholding
payments and shall subtract the amount thereof from the Payments. Agensys shall submit appropriate proof of payment of the withheld Taxes to Ambrx and shall provide Ambrx with the official receipts within a reasonable period of time. Agensys shall
provide Ambrx reasonable assistance necessary to establish that Ambrx is entitled to retain the full amount of any Payments under the Agreement. 
  

	 	5.9	Ambrx Third Party Licenses 

 Notwithstanding the provisions of Section 5.4.7,
and except as otherwise agreed by the Parties in writing, Ambrx shall be solely responsible for obtaining and satisfying all licenses, costs and payments of any kind (including all upfront fees, annual payments, milestone payments and royalty
payments) (i) arising under any license or other grant of rights from a Third Party to Ambrx, including under the Scripps License, which payments arise as a result of any activities hereunder and/or (ii) otherwise arising as a result of
the use of Ambrx’s proprietary platform technology (including ReCODETM Technology and/or EuCODETM Technology and/or Ambrx Payload Technology) as contemplated hereunder. 

ARTICLE 6 

REPRESENTATIONS AND WARRANTIES; COVENANTS 
  

	 	6.1	Mutual Representations and Warranties 

 Each Party represents and warrants to the
other Party the following as of the Effective Date: 
  

	 	(a)	Corporate Power. Such Party is duly organized and validly existing under the laws of the state of its organization and has full corporate power and authority to enter into this Agreement and to perform its
obligations hereunder. 

  

	 	(b)	Due Authorization and Execution. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby have been duly authorized by the necessary corporate actions of
such Party. This Agreement has been duly executed by such Party. This Agreement and any other documents contemplated hereby constitute valid and legally binding obligations of such Party enforceable against it in accordance with their respective
terms, except to the extent that enforcement of the rights and remedies created thereby is subject to bankruptcy, insolvency, reorganization, moratorium and other similar laws of general application affecting the rights and remedies of creditors.

  

	 	(c)	 Non-Contravention. The execution, delivery and performance by such Party of this Agreement and any other agreements and instruments
contemplated 

  
 - 48 - 

	 	
hereunder will not (i) in any material respect violate any statute, regulation, judgment, order, decree or other restriction of any governmental authority to which such Party is subject,
(ii) violate any provision of the corporate charter, by-laws or other organizational documents of such Party, or (iii) constitute a material violation or breach by such Party of any provision of any material contract, agreement or
instrument to which such Party is a party or to which such Party may be subject although not a party (including, with respect to Ambrx, the Scripps License). 

  

	 	6.2	Ambrx Representations and Warranties 

 Ambrx represents and warrants to Agensys
the following as of the Effective Date: 
  

	 	(a)	to the best of Ambrx’s knowledge, the Ambrx Patent Rights and Ambrx Know-How exist and are not invalid or unenforceable, in whole or in part; 

 

	 	(b)	it has the full right, power and authority, including the full right, power and authority to enter into this Agreement, to perform the Research Program and to grant the licenses granted under ARTICLE 3 hereof;

  

	 	(c)	It has not previously (i) assigned, transferred, conveyed or otherwise encumbered its right, title and/or interest in Ambrx Patent Rights or Ambrx Know-How, or (ii) granted any rights to any Third Parties, in
either case that would conflict with the rights granted to Agensys hereunder; 

  

	 	(d)	to the best of Ambrx’s knowledge, it is the sole and exclusive owner or sole and exclusive licensee (pursuant to the Scripps License) of the Ambrx Patent Rights and Ambrx Know-How, all of which are (and shall be)
free and clear of any liens, charges and encumbrances, and no other person, corporate or other private entity, or governmental entity or subdivision thereof, has or shall have any claim of ownership whatsoever with respect to the Ambrx Patent Rights
and/or Ambrx Know-How except pursuant to the Scripps License; 

  

	 	(e)	to the best of Ambrx’s knowledge, the exercise of the license granted to Agensys under the Ambrx Patent Rights and Ambrx Know-How, including the research, development, manufacture, use, sale, export and
import of Compounds, Products, and Ambrx Payload Technology, do not interfere with or infringe any intellectual property rights owned or possessed by any Third Party; 

 

	 	(f)	there are no claims, judgments or settlements against or owed by Ambrx and, to the best of Ambrx’s knowledge, no pending or threatened claims or litigation relating to the Ambrx Patent Rights and/or Ambrx
Know-How including but not limited to Ambrx Payload Technology; 

  

	 	(g)	the Scripps License is the only agreement (including any licenses), written or oral, granting any licenses or other rights to Ambrx (or any of its Affiliates) relating to the Ambrx Know-How, Ambrx Patent Rights or Ambrx
Payload Technology; 

	 	

	 	

  
 - 49 - 

	 	(h)	with respect to the Scripps License, (i) it is in full force and effect; (ii) Ambrx is not in breach; (iii) Ambrx has not received any notice of breach or notice of threatened breach; and
(iv) Ambrx has not received any notice from the counterparty to the Scripps License of intent to reduce the scope of the field or the licenses thereunder or render any of the licenses thereunder non-exclusive, and no event, act or omission has
occurred which would reasonably be expected to give rise to the right of the counterparty to the Scripps License to reduce the scope of the field or the licenses thereunder or render any of the licenses thereunder non-exclusive; 

 

	 	(i)	Ambrx has disclosed to Agensys all reasonably relevant information regarding (i) the Active Selected Targets, and, to the best of Ambrx’s knowledge, relating to the Compounds or Products for use against
such Active Selected Target, and/or (ii) the Ambrx Patent Rights and Ambrx Know-How licensed under this Agreement; 

  

	 	(j)	Ambrx has obtained all necessary consents, approvals and authorizations of all governmental authorities and other Persons required to be obtained by it in connection with the execution, delivery and performance
of this Agreement; 

  

	 	(k)	Ambrx has disclosed all material information and data and all material correspondences to/from any Regulatory Authority controlled by Ambrx (or any of its Affiliates) or to which it (or any of its Affiliates) has
access, in each case related to (i) the Research Program regardless of whether such data and information would have a positive, negative or neutral impact on the potential commercial, scientific or strategic value or attractiveness of the
Research Program or (ii) the Active Selected Targets regardless of whether such data and information would have a positive, negative or neutral impact on the potential commercial, scientific or strategic value or attractiveness of the Active
Selected Targets; and 

  

	 	(l)	Ambrx has not employed or otherwise used in any capacity the services of any Person debarred under United States law, including to Section 21 USC 335a, with respect to the Compounds or Products for use
against the Active Selected Targets. 

  

	 	6.3	Ambrx Further Representations, Warranties and Covenants 

  

	 	6.3.1	 Scripps License. Ambrx represents and warrants to Agensys that it has provided to Agensys in writing prior to the Effective Date a true,
correct and complete copy of the Scripps License, and such copy includes any and all amendments, restatements, side letters, or other modifications thereto, as the Scripps License is in effect as of the Effective Date. Ambrx further covenants and
agrees that during the Term of this Agreement, (a) it will satisfy all of its material obligations (including all payment obligations) under, and take all steps necessary to maintain in full force and effect, the Scripps License, including
taking all steps to ensure that all licenses granted thereunder remain in full force and effect (on an exclusive basis) and that the scope of such licenses (including with respect to all licensed

  
 - 50 - 

	 	
intellectual property (including all Patent Rights) and all fields) are not reduced or limited in any manner that would adversely affect Agensys’ rights under this Agreement; (b) it
will not assign (except an assignment to a party to which this Agreement has been assigned as permitted under Section 10.2), amend, restate, amend and restate, terminate in whole or in part, or otherwise modify the Scripps License in any manner
that would adversely affect Agensys’ rights or obligations hereunder without the prior written consent of Agensys; and (c) it will provide Agensys with prompt notice of any claim of a material breach under the Scripps License or notice of
termination of the Scripps License, made by either Ambrx or the counterparty to the Scripps License (or any party acting on behalf of such counterparty) which would reasonably be expected to have an adverse effect on Agensys’ rights or
obligations hereunder. For the purposes of clarity, Ambrx (and not Agensys) shall be responsible for all of the financial and other obligations of Ambrx (and/or any of its Affiliates) to the counterparty under the Scripps License, including any and
all financial obligations to such counterparty with respect to Net Sales of Agensys and its Related Parties. 

  

	 	6.3.2	 UC Berkeley License. Ambrx represents and warrants to Agensys that (a) it has provided to Agensys in writing prior to the Effective
Date a true, correct and complete copy of the UC Berkeley License; (b) such copy includes any and all amendments, restatements, side letters, or other modifications thereto, as the UC Berkeley License is in effect as of the Effective Date; and
(c) with respect to the UC Berkeley License, (i) it is in full force and effect; (ii) Ambrx is not in breach; (iii) Ambrx has not received any notice of breach or notice of threatened breach; and (iv) Ambrx has not received
any notice from the counterparty to the UC Berkeley License of intent to reduce the scope of the field or the licenses thereunder or render any of the licenses thereunder non-exclusive, and no event, act or omission has occurred which would
reasonably be expected to give rise to the right of the counterparty to the UC Berkeley License to reduce the scope of the field or the licenses thereunder or render any of the licenses thereunder non-exclusive. Ambrx further covenants and agrees
that during the Term, (a) it will satisfy all of its material obligations (including all payment obligations) under, and take all steps necessary to maintain in full force and effect, the UC Berkeley License, including taking all steps to
ensure that all licenses granted thereunder remain in full force and effect (on an exclusive basis) and that the scope of such licenses (including with respect to all licensed intellectual property (including all Patent Rights) and all fields) are
not reduced or limited in any manner that would adversely affect Agensys’ rights under this Agreement; (b) it will not assign (except an assignment to a party to which this Agreement has been assigned as permitted under Section 10.2),
amend, restate, amend and restate, terminate in whole or in part, or otherwise modify the UC Berkeley License in any manner that would adversely affect Agensys’ rights or obligations hereunder without the prior written consent of Agensys; and
(c) it will provide Agensys with prompt notice of any claim of a material breach under the UC Berkeley License or notice of termination of the UC Berkeley License, made by either Ambrx or the counterparty to the UC Berkeley License (or any
party acting on behalf of such 

  
 - 51 - 

	 	
counterparty) which would reasonably be expected to have an adverse effect on Agensys’ rights or obligations hereunder. 

 

	 	6.4	Disclaimer 

 EACH PARTY HEREBY DISCLAIMS ANY AND ALL REPRESENTATIONS AND
WARRANTIES IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED HEREIN NOT EXPRESSLY MADE IN THIS AGREEMENT TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAWS, INCLUDING WITH RESPECT TO THE COMPOUNDS, PRODUCTS, OR ANY TECHNOLOGY OR OTHER INTELLECTUAL
PROPERTY LICENSED OR GRANTED UNDER THIS AGREEMENT, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE. FOR THE AVOIDANCE OF DOUBT, NOTHING CONTAINED IN THIS SECTION 6.4 SHALL
OPERATE TO LIMIT OR INVALIDATE ANY EXPRESS WARRANTY CONTAINED HEREIN OR ANY IMPLIED WARRANTY OF GOOD FAITH AND/OR FAIR DEALING. 
 ARTICLE
7 
 PATENT PROVISIONS 
  

	 	7.1	Filing, Prosecution and Maintenance of Patents for Collaboration Information and Inventions 

  

	 	7.1.1	 Joint Collaboration Information and Inventions. Agensys shall have the first right to file patent applications for Joint Collaboration
Information and Inventions (in the name of both Agensys and Ambrx) and thereafter prosecute and maintain Patent Rights for such Joint Collaboration Information and Inventions. In the event that Agensys files such patent applications and thereafter
prosecutes and maintains Patent Rights for such Joint Collaboration Information and Inventions, Ambrx shall execute such documents and perform such ministerial acts, at Agensys’ expense, as may be reasonably necessary for Agensys to continue
such prosecution or maintenance of Patent Rights claiming such Joint Collaboration Information and Invention. Agensys shall, in its sole discretion, have a right to choose external counsel to assist in the procurement and maintenance of such Joint
Collaboration Information and Inventions; provided that Agensys’ choice of counsel will not present a conflict of interest for Ambrx. With respect to a given Joint Collaboration Information and Invention, Agensys may elect not to file or may
elect not to file in a particular country and if so, Agensys shall notify Ambrx and Ambrx shall have the right to file such patent applications for such Joint Collaboration Information and Invention (in the name of both Agensys and Ambrx) and
thereafter prosecute and maintain Patent Rights for such Joint Collaboration Information and Invention. In the event that Ambrx files such patent applications and thereafter prosecutes and maintains Patent Rights for such Joint Collaboration
Information and Inventions, Agensys shall execute such documents and perform such ministerial acts, at Ambrx’s expense, as may be 

  
 - 52 - 

	 	
reasonably necessary for Ambrx to continue such prosecution or maintenance of Patent Rights claiming such Joint Collaboration Information and Invention. Ambrx shall, in its sole discretion, have
a right to choose external counsel to assist in the procurement and maintenance of such Joint Collaboration Information and Inventions; provided that Ambrx’s choice of counsel will not present a conflict of interest for Agensys.

  

	 	7.1.2	Ambrx Collaboration Information and Inventions. Ambrx shall have the first right, at its sole cost and expense, to file patent applications for Ambrx Collaboration Information and Inventions and thereafter
prosecute and maintain Patent Rights for such Ambrx Collaboration Information and Inventions. With respect to a given Ambrx Collaboration Information and Inventions, Ambrx may elect not to file or may elect not to file in a particular country and if
so, Ambrx shall notify Agensys and Agensys shall have the right to file such patent applications for such Ambrx Collaboration Information and Invention and thereafter prosecute and maintain Patent Rights for such Ambrx Collaboration Information and
Invention, at its sole cost and expense. In such event, Ambrx shall execute such documents and perform such ministerial acts, at Agensys’ expense, as may be reasonably necessary for Agensys to continue such prosecution or maintenance of Patent
Rights claiming such Ambrx Collaboration Information and Invention. 

  

	 	7.1.3	Review and Consultation. In each case in connection with the foregoing with respect to Joint Collaboration Information and Inventions and Ambrx Collaboration Information and Inventions, as applicable, the
filing Party (a) shall keep the non-filing Party advised of the status of the actual and prospective patent filings; (b) upon the non-filing Party’s written request, shall provide advance copies of any papers related to the filing,
prosecution and maintenance of such patent filings; (c) shall give the non-filing Party an opportunity to review the text of the application before filing and shall consult with the non-filing Party with respect thereto; (d) shall give the
non-filing Party an opportunity to review and comment on any documents relating to such patent filings that will be filed in any patent office at least twenty (20) days before such filing and give due consideration to such substantive,
non-cumulative comments; (e) shall supply the non-filing Party with a copy of the application as-filed, together with notice of its filing date and serial number; and (f) shall promptly give notice to the non-filing Party of the grant,
lapse, revocation, surrender, invalidation or abandonment of any Joint Patent Rights (or Patent Rights claiming Ambrx Collaboration Information and Inventions, as applicable) for which it is responsible for the filing, prosecution or maintenance
hereunder (provided that the filing Party shall give at least thirty (30) days prior written notice to the non-filing Party of any desire to cease prosecution and/or maintenance of such Patent Rights on a country by country basis in the
Territory). 

  

	 	7.1.4	 Costs. The Parties shall equally split the costs of filing patent applications and procuring and maintaining Patent Rights in the United
States, Japan, China,  

  
 - 53 - 

	 	
Brazil, and with the European Patent Office (including but not limited to all National Phase filing costs and fees) for such Joint Collaboration Information and Inventions; Agensys shall be
responsible for the costs of filing patent applications and procuring and maintaining Patent Rights for such Joint Collaboration Information and Inventions in all other jurisdictions in the Territory. In light of the foregoing, if, pursuant to
Section 7.1.1, Agensys elects not to file or elects not to file in a particular country and Ambrx elects to file and maintain Patent Rights on such Joint Collaboration Information and Inventions, then Ambrx shall solely pay 100% of the costs to
file and maintain said Patent Rights in the elected country(ies). 

  

	 	7.1.5	Agensys Collaboration Information and Inventions. Agensys shall have the sole right, at its sole cost and expense, to file patent applications for Agensys Collaboration Information and Inventions and
thereafter prosecute and maintain Patent Rights for such Agensys Collaboration Information and Inventions, and Ambrx shall have no rights in connection therewith. 

 

	 	7.1.6	Interpretation of Article 7. The Parties hereby acknowledge and agree that any Patent Rights with respect to Joint Collaboration Information and Inventions filed by Agensys in accordance with the foregoing
Section 7.1.1 shall be considered “Agensys Patent Rights” for purposes of the remaining provisions of this ARTICLE 7 and any Patent Rights with respect to Joint Collaboration Information and Inventions filed by Ambrx in accordance
with the foregoing Section 7.1.1 shall be considered “Ambrx Patent Rights” for purposes of the remaining provisions of this ARTICLE 7, in each case, as applicable. 

 

	 	7.2	Filing, Prosecution and Maintenance of Ambrx Patent Rights (other than Patent Rights for Collaboration Information and Inventions) and Agensys Patent Rights (other than Patent Rights for Collaboration Information
and Inventions) 

  

	 	7.2.1	Ambrx Patent Rights (other than Patent Rights for Collaboration Information and Inventions). Ambrx shall use Commercially Reasonable Efforts to file, prosecute and maintain in the Territory the Ambrx
Patent Rights (other than Patent Rights for Collaboration Information and Inventions, which shall be covered by Section 7.1), in each case, at Ambrx’s sole cost and expense. 

 

	 	7.2.2	Agensys Patent Rights. Agensys shall have the sole right, in its discretion, to file, prosecute and maintain the Agensys Patent Rights (other than Patent Rights for Agensys Collaboration Information and
Inventions, which shall be covered by Section 7.1.5), at Agensys’ sole cost and expense, and Ambrx shall have no rights in connection therewith. 

  

	 	7.3	Interference, Opposition, Invalidation, Reexamination, Reissue, Biosimilar, and Post-Grant Proceedings 

  

	 	(a)	 Ambrx shall, within ten (10) days of learning of such event, inform Agensys of any request for, or filing or declaration of, any interference,
opposition, 

  
 - 54 - 

	 	
invalidation, reissue, derivation, cancellation, revocation, nullification, post-grant review, reexamination or any other official proceeding (each, a “Post Grant Proceeding”)
relating to any Ambrx Patent Rights claiming any Ambrx Collaboration Information and Invention or any Joint Collaboration Information and Invention for which Ambrx is the filing party pursuant to Section 7.1. Agensys and Ambrx shall thereafter
consult and cooperate fully to determine a course of action with respect to any such proceeding and Agensys shall have the right to review and approve any submission to be made in connection with such proceeding. 

 

	 	(b)	Ambrx shall not initiate any Post Grant Proceedings relating to any Ambrx Patent Rights referenced in the foregoing clause (a) without the prior written consent of Agensys, which consent shall not be
unreasonably withheld. 

  

	 	(c)	In connection with any Post Grant Proceedings relating to any Ambrx Patent Rights referenced in the foregoing clause (a), Agensys and Ambrx will provide reasonable assistance that either may reasonably request.
Ambrx shall keep Agensys informed of developments in any such action or proceeding, including, to the extent permissible by law, consultation on and approval of any settlement, the status of any settlement negotiations and the terms of any offer
related thereto. 

  

	 	(d)	As between the Parties, Ambrx shall bear the expense of any Post Grant Proceedings relating to any Ambrx Patent Rights referenced in the foregoing clause (a). 

 

	 	(e)	Agensys shall have the sole right, in its discretion, to handle any Post Grant Proceedings relating to Agensys Patent Rights (including any Patent Rights claiming any Agensys Collaboration Information and
Inventions or any Joint Collaboration Information and Invention for which Agensys is the filing party pursuant to Section 7.1), and Ambrx shall have no rights in connection therewith; provided, however, that at the request of Agensys, Ambrx
will provide Agensys with reasonable assistance that Agensys may reasonably request (and in the event that Agensys is unable to handle such action solely in its own name, Ambrx will join such action voluntarily and will execute and cause its
Affiliates to execute all documents necessary for Agensys to handle and maintain such action). 

  

	 	7.4	Enforcement and Defense 

  

	 	(a)	 Each Party shall promptly notify the other Party of any infringement or possible infringement by a third party of any rights licensed to Agensys under
this Agreement. Further, Ambrx shall give Agensys, and Agensys shall give Ambrx, notice of any infringement of (i) any Ambrx Patent Rights claiming any Ambrx Collaboration Information and Invention or any Joint Collaboration Information and
Invention for which Ambrx is the filing party pursuant to Section 7.1, or any misappropriation or misuse of Ambrx Collaboration Information and Inventions, that may come to Ambrx’s or Agensys’ attention. Agensys and Ambrx shall
thereafter consult and cooperate fully to determine a course of action, including 

  
 - 55 - 

	 	
but not limited to, the commencement of legal action by either or both Agensys and Ambrx, to terminate any infringement of such Ambrx Patent Rights or any misappropriation or misuse of such Ambrx
Collaboration Information and Invention, as applicable. However, Ambrx, upon notice to Agensys, shall have the first right to initiate and prosecute such legal action at its own expense and in the name of Ambrx, or to control the defense of any
declaratory judgment action relating to such Ambrx Patent Rights or such Ambrx Collaboration Information and Inventions, as applicable, and Agensys, upon notice to Ambrx, shall have the first right to initiate and prosecute such legal action at its
own expense and in the name of Agensys, or to control the defense of any declaratory judgment action relating to such Ambrx Patent Rights or such Ambrx Collaboration Information and Inventions, as applicable. To the extent permissible by Applicable
Law, the non-controlling Party shall have the right to join and participate in such action. Each Party shall promptly inform the other Party if it elects not to exercise such first right and the other Party shall thereafter have the right to either
initiate and prosecute such action or to control the defense of such declaratory judgment action in its name and, if necessary, the name of the first Party. Each Party shall have the right to be represented by counsel of its own choice.

  

	 	(b)	In the event that Ambrx elects not to initiate and prosecute an action as provided in paragraph (a), and Agensys elects to do so, the costs of any agreed-upon course of action to terminate infringement of Ambrx Patent
Rights referenced in the foregoing clause (a) or misappropriation or misuse of Ambrx Collaboration Information and Inventions, as applicable, by a Third Party, including without limitation the costs of any legal action commenced or the defense
of any declaratory judgment, shall be shared equally by Ambrx and Agensys. 

  

	 	(c)	For any action to terminate any infringement of Ambrx Patent Rights referenced in the foregoing clause (a) or any misappropriation or misuse of Ambrx Collaboration Information and Inventions, as applicable,
by a Third Party, in the event that Agensys is unable to initiate or prosecute such action solely in its own name, Ambrx will join such action voluntarily and will execute all documents necessary for Agensys to initiate litigation to prosecute and
maintain such action. In connection with any such action, Agensys and Ambrx will provide reasonable assistance that either may reasonably request. Each Party shall keep the other informed of developments in any action or proceeding, including, to
the extent permissible by Applicable Law, consultation on and approval of any settlement, the status of any settlement negotiations and the terms of any offer related thereto. 

 

	 	(d)	Any recovery obtained by either or both Agensys and Ambrx in connection with or as a result of any action contemplated by the foregoing provisions of this Section 7.4 with respect to any Ambrx Patent Rights
referenced in the foregoing clause (a) or Ambrx Collaboration Information and Inventions, whether by settlement or otherwise, shall be shared in order as follows: 

 

	 	(i)	 the Party which initiated and prosecuted the action shall recoup all of its

  
 - 56 - 

	 	
costs and expenses incurred in connection with the action; 

  

	 	(ii)	the other Party shall then, to the extent possible, recover its costs and expenses incurred in connection with the action; and 

 

	 	(iii)	the amount of any recovery remaining shall then be shared equally between the Parties. 

  

	 	(e)	Agensys shall have the initial right to control any proceedings and initiate a legal action against Third Party with respect to a biosimilar application filed under §351(k) by an unlicensed Third Party at
Agensys’ sole cost and expense. Ambrx shall join in such action as a party at Agensys reasonable request and at Agensys’ sole cost and expense in the event that an adverse party asserts, the court rules or other Laws provide, or
Agensys determines in good faith, that a court would lack jurisdiction based on Ambrx’s absence as a party in such suit. Ambrx may also at any time join in such action and may be represented by counsel of its choice, at Ambrx expense; but
in any event control of such action shall remain with Agensys. At Agensys’ reasonable request and at Agensys’ sole cost and expense, Ambrx shall provide reasonable assistance to Agensys in connection with such action. Without the
prior written consent of Ambrx, Agensys shall not enter into any settlement with such unlicensed Third Party admitting the invalidity of, or otherwise impairing Ambrx rights in, any of the Ambrx Patent Rights or Joint Patent Rights.

  

	 	(f)	 Agensys shall have the sole right, in its discretion, to handle any action with respect to any infringement of Agensys Patent Rights (including any
Patent Rights claiming any Agensys Collaboration Information and Inventions and any Joint Collaboration Information and Inventions for which Agensys is the filing party pursuant to Section 7.1) or any misappropriation or misuse of any Agensys
Background Know-How (or any Agensys Collaboration Information and Inventions or any Joint Collaboration Information and Inventions), and Ambrx shall have no rights in connection therewith. For any action with respect to any infringement of Agensys
Patent Rights or any misappropriation or misuse of Agensys Background Know-How (or any Agensys Collaboration Information and Inventions or any Joint Collaboration Information and Inventions, as applicable) by a Third Party, in the event that Agensys
is unable to initiate or prosecute such action solely in its own name, Ambrx will, to the extent required by Applicable Law to enable the initiation or prosecution of such action by Agensys, join such action voluntarily and will execute and cause
its Affiliates to execute all documents necessary for Agensys to initiate litigation to prosecute and maintain such action at Agensys’ expense. In connection with any such action pursuant to this Section 7.4(f), at the request of Agensys,
Ambrx will provide Agensys with reasonable assistance that Agensys may reasonably request at Agensys’ expense. As between the Parties, any recovery obtained in connection with or as a result of any action contemplated by this
Section 7.4(f), whether by settlement or otherwise, shall be shall be retained solely by Agensys. Agensys shall also have 

  
 - 57 - 

	 	
the sole right, in its discretion, to handle any certification matter regarding any Agensys Patent Rights pursuant to either 21 U.S.C. §§355(b)(2)(A)(iv) or (j)(2)(A)(vii)(IV) or its
successor provisions, or any similar provisions in a country in the Territory, and Ambrx shall have no rights in connection therewith. 

  

	 	7.5	Cooperation; Patent Term Restoration 

 The Parties agree to cooperate and to take
reasonable actions to maximize the protections available under the safe harbor provisions of 35 U.S.C. 103(c) for U.S. patents/patent applications with respect to any patents/patent applications claiming any Collaboration Information and Invention.
The Parties hereto shall provide reasonable assistance that either may reasonably request in obtaining patent term restoration or supplemental protection certificates or their equivalents in any country in the Territory where applicable to
(i) Compound Patent Rights or (ii) other Ambrx Patent Rights claiming Collaboration Information and Inventions. In the event that elections with respect to obtaining such patent term restoration are to be made, Agensys shall have the right
to make the election and Ambrx agrees to abide by such election. 
 ARTICLE 8 

TERM AND TERMINATION 
  

	 	8.1	Term and Expiration 

 This Agreement shall be effective as of the Effective Date
and unless terminated earlier pursuant to Section 8.2 below, this Agreement shall continue in full force and effect on a Product-by-Product and country-by-country basis until expiration of all Agensys royalty obligations hereunder with respect
to such Product in such country. The period from the Effective Date until the date of expiration or earlier termination of this Agreement in its entirety, or as the case may be, until the date of the expiration or earlier termination of this
Agreement in part with respect to a given Product on a country-by-country basis, shall be referred to herein as the “Term”. 
  

	 	8.2	Agensys Termination for Convenience. Agensys shall have the right to terminate this Agreement at any time and from time to time in its sole discretion either in its entirety or on a Target-by-Target and/or
country-by-country basis for any reason. Any termination under this Section 8.2 shall be accomplished by Agensys giving ninety (90) days’ advance written notice to Ambrx. In the event that this Agreement is terminated only with
respect to a given Target and/or a given country pursuant to this Section 8.2, then the effects of termination as set forth in Section 8.4 shall only apply with respect to all Compounds and Products related to such Target and/or such
country, as applicable. For clarity, expiration of the Research Term and early discontinuance of the Research Program under Section 2.8.2 shall not be considered a termination of this Agreement pursuant to this Section 8.2.

  

	 	8.3	Termination for Cause. This Agreement may be terminated in its entirety or on a Product-by-Product and country-by-country basis at any time during the Term: 

  
 - 58 - 

	 	(a)	upon written notice by either Party if the other Party is in breach of its material obligations hereunder, and has not cured such breach within ninety (90) days after notice requesting cure of the breach; provided,
however, that in the event of a good faith dispute with respect to the existence of a material breach, the ninety (90) day cure period shall be tolled until such time as the dispute is resolved pursuant to Section 10.6 hereof; provided
further, however, that notwithstanding the foregoing, it is agreed that termination pursuant to this Section 8.3(a) shall be on a Product-by-Product and country-by-country basis to which the material breach relates, as applicable, and that the
non-breaching Party cannot terminate this Agreement under this Section 8.3(a) with respect to non-affected Products and non-affected countries (and the effects of termination as set forth in Section 8.4 shall only apply with respect to
such terminated Product and such terminated country, as applicable); or 

  

	 	(b)	by Ambrx, at any time, immediately upon written notice to Agensys in the event that Agensys or any of its Affiliates challenges in a court of competent jurisdiction, the validity, scope or enforceability of, or
otherwise opposes, any Ambrx Patent Rights. If a sublicensee of Agensys or its Affiliate challenges the validity, scope or enforceability of or otherwise opposes any Ambrx Patent Right under which such sublicensee is sublicensed, then Agensys or its
Affiliate, as applicable, shall, upon written notice from Ambrx, terminate such sublicense. Agensys and each of its Affiliates shall include without limitation provisions in all agreements under which a Third Party obtains a license under any Ambrx
Patent Right providing that, if the sublicensee challenges the validity or enforceability of or otherwise opposes any such Ambrx Patent Right under which the sublicensee is sublicensed, then Agensys may terminate such sublicense agreement with such
sublicensee, and Agensys shall, upon request by Ambrx, enforce such right if such sublicensee breaches such restriction; or 

  

	 	(c)	by either Party upon the filing or institution of bankruptcy, reorganization, liquidation or receivership proceedings, or upon an assignment of a substantial portion of the assets for the benefit of creditors by
the other Party; provided, however, that in the case of any involuntary bankruptcy proceeding such right to terminate shall only become effective if the Party consents to the involuntary bankruptcy or such proceeding is not dismissed within ninety
(90) days after the filing thereof. 

  

	 	8.4	Effect of Termination 

  

	 	(a)	 If Agensys terminates this Agreement under Section 8.3(a): (i) Agensys’ licenses pursuant to Sections 3.1.1(d) and 3.1.1(e)
shall become perpetual, irrevocable licenses (provided, however, that Agensys shall continue to be obligated to pay the milestone and royalty amounts under Sections 5.3 and 5.4 that would otherwise have been payable under the terms of this Agreement
during its Term on the Products or country(ies) subject to the termination), (ii) except with respect to the milestones and royalties as provided in the foregoing clause (i), no further

  
 - 59 - 

	 	
payments or other fees, costs or payments of any kind shall be owed to Ambrx on account of Products or country(ies) for which this Agreement was terminated, except as mutually agreed by the
Parties in writing, and (iii) Ambrx shall, within thirty (30) days after the effective date of such termination, to return or cause to be returned to Agensys all Confidential Information and all Agensys substances or Agensys compositions
delivered or provided by Agensys, as well as any other Agensys material provided by Agensys in any medium (provided, however, that Ambrx may retain any such Confidential Information, substances, compositions and/or material, as applicable, as are
reasonably necessary for Ambrx’s continued practice under any licenses which survive such termination and Ambrx may keep one copy of Confidential Information received from Agensys in its confidential files for record purposes).

  

	 	(b)	If Agensys terminates this Agreement under Section 8.2 or if Ambrx terminates this Agreement under Section 8.3(a) or 8.3(b), then (i) Agensys’ licenses pursuant to Sections 3.1.1(d) and
3.1.1(e) shall terminate, and (ii) each Party shall, within thirty (30) days after the effective date of such termination, return or cause to be returned to the other Party all Confidential Information of the other Party and all substances
or compositions owned by the other Party delivered or provided by such other Party, as well as any other material owned by such other Party provided by such other Party in any medium (provided, however, that receiving Party may retain any such
Confidential Information, substances, compositions and/or material, as applicable, as are reasonably necessary for such other Party’s continued practice under any licenses(s) which survive such termination and the receiving Party may keep one
copy of Confidential Information received from the other Party in its confidential files for record purposes). 

  

	 	(c)	Notwithstanding the foregoing, upon termination of this Agreement by Ambrx pursuant to Section 8.3(a), the applicable licenses set forth in Sections 3.1.1(d) and 3.1.1(e) shall survive for a period of
eighteen (18) months in order for Agensys and its Affiliates, sublicensees and distributors, at their discretion, during such eighteen (18) month period immediately following the effective date of termination, to finish any Product related
manufacturing work-in-progress and to sell any Products or Compound remaining in inventory, in accordance with the terms of this Agreement, in each case, utilizing such licenses (subject to the payment obligations of Agensys as set forth in Section
5). 

  

	 	(d)	 If this Agreement is terminated by Agensys pursuant to Section 8.3(c), then the provisions of Section 8.4(a) shall apply, and in
addition, if such termination would be due to a rejection of this Agreement by or on behalf of Ambrx under Section 365 of the United States Bankruptcy Code (the “Code”), all licenses and rights to licenses granted under or
pursuant to this Agreement by Ambrx to Agensys are, and shall otherwise be deemed to be, for purposes of Section 365(n) of the Code, licenses of rights to “intellectual property” as defined under Section 101(35A) of the Code and
not executory contracts. The Parties agree that Agensys, as a licensee of such rights under this Agreement, shall retain and may 

  
 - 60 - 

	 	
fully exercise all of its rights and elections under the Code. The foregoing provisions of Section 8.4(d) are without prejudice to any rights Agensys may have arising under the Code or other
Applicable Law. 

  

	 	(e)	For clarity, if this Agreement is terminated only with respect to a given Product(s) and/or a given country(ies, then the foregoing provisions of this Section 8.4 shall only apply with respect to such Product
and/or such country, as applicable. 

  

	 	8.5	Effect of Expiration or Termination; Survival 

  

	 	(a)	Upon expiration of the Term, Agensys’ licenses pursuant to Sections 3.1.1(d) and 3.1.1(e) shall become fully paid-up, perpetual, irrevocable licenses. 

 

	 	(b)	Expiration or termination of this Agreement shall not relieve the Parties of any obligation accruing prior to such expiration or termination. Each Party shall pay all amounts then due and owing as of the
expiration or termination date (and Ambrx shall reimburse Agensys for any uncredited fees paid by Agensys pursuant to the Research Program). Any expiration or termination of this Agreement shall be without prejudice to the rights of either Party
against the other accrued or accruing under this Agreement prior to expiration or termination, including the obligation to pay royalties for Product(s) or Compound sold prior to such expiration or termination. 

 

	 	(c)	The provisions of ARTICLE 4 shall survive the expiration or termination of this Agreement and shall continue in effect for ten (10) years. In addition, the provisions of Articles 1 (as necessary for the
interpretation of other surviving provisions), 7 and 10, and Sections 2.6.1, 2.6.4, 2.7, 2.9 (other than the first sentence thereof), 2.11.4, 5.2.2, 5.2.3, 5.6, 6.4, 8.4, 9.1 through 9.4, and this 8.5 shall survive any expiration or termination of
this Agreement. 

 ARTICLE 9 

INDEMNIFICATION; LIMITATION ON LIABILITY 
  

	 	9.1	Indemnification by Agensys 

 Agensys hereby agrees to indemnify, hold harmless and
defend Ambrx, its Affiliates and their respective officers, directors, agents, employees, successors and assigns (collectively, the “Ambrx Indemnified Parties”) against any and all losses, costs, expenses, fees or damages arising
out of or relating to claims, allegations, suits, actions or proceedings asserted by any Third Party, whether governmental or private, arising out of or relating to (i) the research, development, manufacture, use, sale or other disposition of
Compounds and Products by Agensys or its Affiliates or sublicensees under this Agreement, (ii) the breach of any of Agensys’ covenants, representations or warranties under this Agreement, or (iii) the willful misconduct by Agensys,
its Affiliates or their respective officers, directors, agents or employees, in performing any obligations under this Agreement; provided, however, that Agensys shall not be required to indemnify, hold harmless or defend any Ambrx Indemnified Party
against any claim to the extent that 

  
 - 61 - 

 
Ambrx has an obligation to indemnify the Agensys Indemnified Parties under clauses (ii) or (iii) of Section 9.2. 

 

	 	9.2	Indemnification by Ambrx 

 Ambrx agrees to indemnify, hold harmless and defend
Agensys, its Affiliates and their respective officers, directors, agents, employees, successors and assigns (collectively, the “Agensys Indemnified Parties”) against any and all losses, costs, expenses, fees or damages arising out
of or relating to claims, allegations, suits, actions or proceedings asserted by any Third Party, whether governmental or private, arising out of or relating to (i) the research, development, manufacture, use or other disposition of Compounds
and/or Products by Ambrx or its sublicensees under this Agreement, (ii) the breach of any of Ambrx’s covenants, representations or warranties under this Agreement, or (iii) the willful misconduct by Ambrx or its officers, directors,
agents or employees, in performing any obligations under this Agreement; provided, however, that Ambrx shall not be required to indemnify, hold harmless or defend any Agensys Indemnified Party against any claim to the extent that Agensys has an
obligation to indemnify the Ambrx Indemnified Parties under clauses (ii) or (iii) of Section 9.1. 
  

	 	9.3	Procedure 

 If either Party is seeking indemnification under Section 9.1 or
9.2 (the “Indemnified Party”), it shall inform the other Party (the “Indemnifying Party”) of the claim giving rise to the obligation to indemnify pursuant to such Section as soon as reasonably
practicable after receiving notice of the claim (provided, however, any delay or failure to provide such notice shall not constitute a waiver or release of, or otherwise limit, the Indemnified Party’s rights to indemnification under, as
applicable, Section 9.1 or 9.2, except to the extent that such delay or failure materially prejudices the Indemnifying Party’s ability to defend against the relevant claims). The Indemnifying Party shall have the right to assume the
defense of any such claim for which it is obligated to indemnify the Indemnified Party. The Indemnified Party shall cooperate with the Indemnifying Party and the Indemnifying Party’s insurer as the Indemnifying Party may reasonably request, and
at the Indemnifying Party’s cost and expense. The Indemnified Party shall have the right to participate, at its own expense and with counsel of its choice, in the defense of any claim or suit that has been assumed by the Indemnifying Party. The
Indemnifying Party shall not settle any claim without the prior written consent of the Indemnified Party, not to be unreasonably withheld. The Indemnified Party shall not settle or compromise any such claim without the prior written consent of the
Indemnifying Party, which it may provide in its sole discretion. If the Parties cannot agree as to the application of Section 9.1 or 9.2 to any claim, pending resolution of the dispute pursuant to Section 10.6, the Parties may conduct
separate defenses of such claims, with each Party retaining the right to claim indemnification from the other Party in accordance with Section 9.1 or 9.2 upon resolution of the underlying claim. 

  
 - 62 - 

	 	9.4	Limitation of Liability 

 NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY SPECIAL,
CONSEQUENTIAL, INCIDENTAL, PUNITIVE, OR INDIRECT DAMAGES (INCLUDING LOST PROFITS) ARISING FROM OR RELATING TO THIS AGREEMENT (INCLUDING BREACH OF THIS AGREEMENT) OR THE EXERCISE OF ITS RIGHTS HEREUNDER, REGARDLESS OF ANY NOTICE OF THE POSSIBILITY OF
SUCH DAMAGES. NOTWITHSTANDING THE FOREGOING, NOTHING IN THIS SECTION 9.4 IS INTENDED TO OR SHALL LIMIT OR RESTRICT (1) THE INDEMNIFICATION RIGHTS OR OBLIGATIONS OF ANY PARTY UNDER SECTION 9.1 OR 9.2, OR (2) DAMAGES AVAILABLE FOR A
PARTY’S BREACH OF ITS CONFIDENTIALITY OBLIGATIONS UNDER ARTICLE 4. 
  

	 	9.5	Insurance 

 Each Party shall procure and maintain insurance, including product
liability insurance (or self-insure), adequate to cover its obligations hereunder and which is consistent with normal business practices of prudent companies similarly situated at all times during which any Product or Reversion Product, as
applicable, is being clinically tested with human subjects or commercially distributed or sold by such Party. It is understood that such insurance shall not be construed to create a limit of either Party’s liability with respect to its
indemnification obligations under this ARTICLE 9 or otherwise. Each Party shall provide the other Party with written evidence of such insurance upon request. Each Party shall provide the other Party with written notice at least thirty (30) days
prior to the cancellation, non renewal or material change in such insurance or self insurance which materially adversely affects the rights of the other Party hereunder. 

ARTICLE 10 

MISCELLANEOUS 
  

	 	10.1	Force Majeure 

 Neither Party shall be held liable to the other Party nor be
deemed to have defaulted under or breached this Agreement for failure or delay in performing any obligation under this Agreement to the extent that such failure or delay is caused by or results from causes beyond the reasonable control of the
affected Party, potentially including, embargoes, war, acts of war (whether war be declared or not), acts of terrorism, insurrections, riots, civil commotions, strikes, lockouts or other labor disturbances, fire, floods, or other acts of God, or
acts, omissions or delays in acting by any governmental authority or the other Party. The affected Party shall notify the other Party of such force majeure circumstances as soon as reasonably practical, and shall promptly undertake all reasonable
efforts necessary to cure such force majeure circumstances. 

  
 - 63 - 

	 	10.2	Assignment/Change of Control 

 Except as provided in this Section 10.2, this
Agreement may not be assigned or otherwise transferred, nor may any right or obligation hereunder be assigned or transferred, by either Party without the consent of the other Party. Notwithstanding the foregoing, either Party may, without the other
Party’s consent, assign this Agreement and its rights and obligations hereunder in whole or in part to (i) an Affiliate or (ii) in connection with a Change of Control; provided, however, that Ambrx must notify Agensys at least twenty
(20) days prior to completion of any such Change of Control, and Agensys shall have the right (in its discretion), at any time after receipt of such notice, to elect any one or more of the following options: (i) terminate the Research
Program in compliance with Section 2.8.2 (and Ambrx shall reimburse Agensys for any uncredited fees paid by Agensys pursuant to the Research Program), (ii) require Ambrx, including its acquiring party, to adopt reasonable procedures to be
agreed upon in writing with Agensys to prevent the disclosure of all Confidential Information of Agensys and its Affiliates and other information with respect to the development and commercialization of Compounds or Products (the “Sensitive
Information”) beyond Ambrx personnel having access to and knowledge of Sensitive Information prior to the Ambrx Change of Control, and to control the dissemination of Sensitive Information disclosed after the Ambrx Change of Control, which
procedures shall include reasonable restrictions on the scope of any Sensitive Information to be provided by Agensys; (iii) terminate Ambrx’s involvement on the JPT; and/or (iv) terminate the Agreement in its entirety pursuant to
Section 8.2. Any permitted assignee shall assume all obligations of its assignor under this Agreement. This Agreement is binding upon the permitted successors and assigns of the Parties. Any attempted assignment not in accordance with this
Section 10.2 shall be void. 
  

	 	10.3	Severability 

 If any one or more of the provisions contained in this Agreement is
held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby, unless the absence of the invalidated provision(s)
adversely affects the substantive rights of the Parties. The Parties shall in such an instance use their good faith efforts to replace the invalid, illegal or unenforceable provision(s) with valid, legal and enforceable provision(s) which, insofar
as practical, implement the purposes of this Agreement. 
  

	 	10.4	Notices 

 All notices which are required or permitted hereunder shall be in
writing and sufficient if delivered personally, sent by facsimile (and promptly confirmed by personal delivery, registered or certified mail or overnight courier), sent by nationally-recognized overnight courier or sent by registered or certified
mail, postage prepaid, return receipt requested, addressed as follows: 
  

			
	If to Ambrx, to:	  	Ambrx, Inc.
		  	10975 North Torrey Pines Road
		  	La Jolla, CA 92037

  
 - 64 - 

			
		  	Attn: Office of General Counsel
		  	Facsimile No.: (858) 453-9511
		
	With a copy to:	  	Latham & Watkins, LLP
		  	12636 High Bluff Drive, Suite 400
		  	San Diego, CA 92130
		  	Attention: Faye H. Russell, Esq.
		  	Facsimile No.: (858) 523-5450
		
	If to Agensys, to:	  	Agensys, Inc.
		  	1800 Stewart St.
		  	Santa Monica, CA 90404
		  	Attn: V.P., Head of Research
		  	Facsimile No.: 310-382-2888
		
	With a copy to:	  	Agensys, Inc.
		  	Legal Department
		  	1800 Stewart St,
		  	Santa Monica, CA 90404
		  	ATTN: Shane M. Popp, Esq.
		  	Facsimile No.: 310-382-2888
		  	e-mail: spopp@agensys.com

 or to such other address(es) as the Party to whom notice is to be given may have furnished to the other Party
in writing in accordance herewith. Any such notice shall be deemed to have been given: (a) when delivered, if personally delivered or sent by facsimile on a business day (or if delivered or sent on a non-business day, then on the next business
day); (b) on the business day after dispatch, if sent by nationally-recognized overnight courier; or (c) on the fifth (5th) business day following the date of mailing, if sent by mail. 

 

	 	10.5	Applicable Law 

 This Agreement shall be governed by and construed in accordance
with the laws of the State of California and the patent laws of the United States, without reference to any rules of conflict of laws or renvoi. 
  

	 	10.6	Dispute Resolution 

  

	 	10.6.1	 The Parties shall negotiate in good faith and use reasonable efforts to settle any dispute, controversy or claim arising from or related to this
Agreement or the breach thereof. If the Parties do not fully settle, and a Party wishes to pursue the matter, each such dispute, controversy or claim that is not an “Excluded Claim” shall be finally resolved by binding arbitration in
accordance with the 

  
 - 65 - 

	 	
Commercial Arbitration Rules and Supplementary Procedures for Large Complex Disputes of the American Arbitration Association (“AAA”), and judgment on the arbitration award may be
entered in any court having jurisdiction thereof. 

  

	 	10.6.2	The arbitration shall be conducted by a panel of three persons experienced in the pharmaceutical business: within thirty (30) days after initiation of arbitration, each Party shall select one person to act as
arbitrator; and the two Party-selected arbitrators shall select a third arbitrator within thirty (30) days of their appointment. If the arbitrators selected by the Parties are unable or fail to agree upon the third arbitrator, the third
arbitrator shall be appointed by the AAA. The place of arbitration shall be Los Angeles, California, and all proceedings and communications shall be in English. 

  

	 	10.6.3	Either Party may apply to the arbitrators for interim injunctive relief until the arbitration award is rendered or the controversy is otherwise resolved. Either Party also may, without waiving any remedy under this
Agreement, seek from any court having jurisdiction any injunctive or provisional relief necessary to protect the rights or property of that Party pending the arbitration award. The arbitrators shall have no authority to award punitive or any other
type of damages not measured by a Party’s compensatory damages. Each Party shall bear its own costs and expenses and attorneys’ fees and an equal share of the arbitrators’ fees and any administrative fees of arbitration.

  

	 	10.6.4	Except to the extent necessary to confirm an award or as may be required by Applicable Law, neither a Party nor an arbitrator may disclose the existence, content, or results of an arbitration without the prior written
consent of both Parties. In no event shall an arbitration be initiated after the date when commencement of a legal or equitable proceeding based on the dispute, controversy or claim would be barred by the applicable California statute of
limitations. 

  

	 	10.6.5	The Parties agree that, in the event of a good faith dispute over the nature or quality of performance under this Agreement, neither Party may terminate this Agreement until final resolution of the dispute through
arbitration or other judicial determination. The Parties further agree that any payments made pursuant to this Agreement pending resolution of the dispute shall be refunded if an arbitrator or court determines that such payments are not due.

  

	 	10.6.6	As used in this Section, the term “Excluded Claim” shall mean a dispute, controversy or claim that concerns (a) the validity or infringement of a patent, trademark or copyright; or (b) any
antitrust, anti-monopoly or competition law or regulation, whether or not statutory. 

  

	 	10.7	Entire Agreement; Amendments 

 This Agreement together with the Schedules hereto
contains the entire understanding of the Parties with respect to the subject matter hereof, including the Research Program and 

  
 - 66 - 

 
the licenses granted hereunder. Any other express or implied agreements and understandings, negotiations, writings and commitments, either oral or written, with regard to the subject matter
hereof, including the Research Program and/or the licenses granted hereunder, are superseded by the terms of this Agreement. The Schedules to this Agreement are incorporated herein by reference and shall be deemed a part of this Agreement. This
Agreement may be amended, or any term hereof modified, only by a written instrument duly executed by authorized representatives of both Parties hereto. 
  

	 	10.8	Headings and Interpretation 

 The captions to the several Articles and Sections
and subsections hereof are not a part of this Agreement, but are merely for convenience to assist in locating and reading the several Articles and Sections hereof. Any reference in this Agreement to an Article, Section, subsection, paragraph,
clause, or Schedule or Exhibit shall be deemed to be a reference to an Article, Section, subsection, paragraph, clause, or Schedule or Exhibit, of or to, as the case may be, this Agreement, unless otherwise indicated. Unless the context of this
Agreement otherwise requires, (a) words of any gender include each other gender, (b) words such as “herein”, “hereof”, and “hereunder” refer to this Agreement as a whole and not merely to the particular
provision in which such words appear, (c) words using the singular shall include the plural, and vice versa, (d) whenever any provision of this Agreement uses the term “including” (or “includes” or words of similar
import), such term shall not be limiting and such term shall be deemed to mean “including without limitation” (or “includes without limitation”), (e) the word “or” shall not be construed as exclusive, and
(f) references to any Articles or Sections include Sections and subsections that are part of the reference Article or section (e.g., a section numbered “Section 2.2.1” would be part of “Section 2.2.”, and references to
“Article 2” or “Section 2.2.” would refer to material contained in the subsection described as “Section 2.2.2”). 
  

	 	10.9	Independent Contractors 

 It is expressly agreed that Ambrx and Agensys shall be
independent contractors and that the relationship between the Parties shall not constitute a partnership, joint venture or agency. Neither Ambrx nor Agensys shall have the authority to make any statements, representations or commitments of any kind,
or to take any action, which shall be binding on the other Party, without the prior written consent of the other Party. 

  
 - 67 - 

	 	10.10	Waiver 

 The waiver by either Party hereto of any right hereunder, or of any
failure of the other Party to perform, or of any breach by the other Party, shall not be deemed a waiver of any other right hereunder or of any other breach by or failure of such other Party, whether of a similar nature or otherwise. 

 

	 	10.11	Cumulative Remedies 

 No remedy referred to in this Agreement is intended to be
exclusive, but each shall be cumulative and in addition to any other remedy referred to in this Agreement or otherwise available under law. 
  

	 	10.12	Waiver of Rule of Construction 

 Each Party has had the opportunity to consult
with counsel in connection with the review, drafting and negotiation of this Agreement. Accordingly, the rule of construction that any ambiguity in this Agreement shall be construed against the drafting Party shall not apply. 

 

	 	10.13	Business Day Requirements 

 In the event that any notice or other action or
omission is required to be taken by a Party under this Agreement on a day that is not a business day then such notice or other action or omission shall be deemed to be required to be taken on the next occurring business day. 

 

	 	10.14	Counterparts 

 This Agreement may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute one and the same instrument. For purposes hereof, a scanned copy of this Agreement, including the signature pages hereto, will be deemed to be an original. 

 

	 	10.15	Further Actions 

 Each Party will execute, acknowledge and deliver such further
instruments, and to do all such other ministerial, administrative or similar acts, as may be necessary or appropriate in order to carry out the purposes and intent of this Agreement. 

 

	 	10.16	No Third Party Rights 

 The provisions of this Agreement are for the exclusive
benefit of the Parties, and no other person or entity shall have any right or claim against any Party by reason of these provisions or be entitled to enforce any of these provisions against any Party. 

  
 - 68 - 

	 	10.17	Expenses 

 Except as otherwise specifically provided in this Agreement, each Party
(and its Affiliates) shall bear its own costs and expenses in connection with entering into this Agreement and the consummation of the transactions and performance of its obligations contemplated hereby. 

 

	 	10.18	Extension to Affiliates 

 Agensys shall have the right to extend the rights,
licenses, immunities and obligations granted in this Agreement to one or more of its Affiliates. All applicable terms and provisions of this Agreement shall apply to any such Affiliate to which this Agreement has been extended to the same extent as
such terms and provisions apply to Agensys. Agensys shall remain fully liable for any acts or omissions of such Affiliates. 
 [Remainder
of this page is left intentionally blank] 

  
 - 69 - 

 IN WITNESS WHEREOF, the Parties have executed this Research Collaboration and Exclusive
License Agreement as of the date first set forth above. 
  

					
		 	AGENSYS, INC.
			
		 	By:	 	 /s/ Sef Kurstjens

		 	Name:	 	 Dr. Sef Kurstjens

		 	Title:	 	 President and CEO

		
		 	AMBRX, INC.
			
		 	By:	 	 /s/ Simon Allen

		 	Name:	 	Simon Allen
		 	Title:	 	Chief Business Officer

 SIGNATURE PAGE TO RESEARCH COLLABORATION 

AND EXCLUSIVE LICENSE AGREEMENT 

 SCHEDULE 1.79 

Workplan for Agensys/Ambrx Collaboration FY2013 

At the beginning of each year, a workplan for the year will be generated and agreed upon between Agensys and Ambrx. This Appendix 1 describes the workplan for
FY2013 (April 2013 – March 2014). 
 [***] An overview of the workplan timeline is depicted in Table 1 and specifics are described hereon. 

 

	 	1.	[***] 

  

	 	2.	[***] 

  

	 	3.	[***] 

  

	 	4.	[***] 

  

	 	a.	[***] 

  

	 	i.	[***] 

  

	 	ii.	[***] 

  

	 	b.	[***] 

  

	 	i.	[***] 

  

	 	ii.	[***] 

  

	 	5.	[***] 

  

	 	a.	[***] 

  

	 	b.	[***] 

  

	 	c.	[***] 

  

	 	d.	[***] 

  

	 	6.	[***] 

  

	 	7.	[***] 

  

	 	a.	[***] 

  

	 	b.	[***] 

  

	 	8.	[***] 

  

	 	a.	[***] 

  

	 	b.	[***] 

  

	 	9.	[***] 

  

	 	10.	[***] 

  

	 	a.	[***] 

  

	 	b.	[***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 

 Experimental flow 
  

							
	 	  	 Activity
	  	 Description
	  	 Performed by

				
	[***]	  	[***]	  	[***] [***]	  	[***]
				
	[***]	  	[***]	  	[***]	  	[***]
				
	[***]	  	[***]	  	[***]	  	[***]
				
	[***]	  	[***]	  	[***]	  	[***]
				
	[***]	  	[***]	  	[***]	  	[***]
				
	[***]	  	[***]	  	[***][***][***][***]	  	[***]
				
	[***]	  	[***]	  	[***]	  	[***]

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 

 Additional Material Transfer to Support the Program: 

 

					
	 	  	 [***]
	  	 [***]

	[***]	  	[***]	  	
			
	[***]	  	[***]	  	[***] [***]
			
	[***]	  	[***]	  	
			
	[***]	  	[***]	  	
			
	[***]	  	[***]	  	[***] [***]
			
	[***]	  	[***]	  	

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions. 

 SCHEDULE 1.85 

SELECTED TARGETS 
 (as of
the Effective Date) 
 TARGET 1: 

[***][***][***][***][***][***] 
 [***][***][***][***] 

TARGET 2: 
 [***] 

TARGET 3: 
 [***] 

  
 ***Certain information on this page has
been omitted and filed separately with the Commission. Confidential treatment has been requested with respect to the omitted portions.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00230-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00230-of-00352.parquet"}]]