Document:

Exhibit 10.2

 

 

 

 

 

 

CLINICAL
COLLABORATION AGREEMENT

BY AND BETWEEN

HUMANIGEN, INC.

AND

KITE PHARMA, INC.

 

 

 

 

 

    	 	 	 

    	 

    

 

Table of Contents

 

Page

 

	ARTICLE 1	DEFINITIONS	1
	ARTICLE 2	CONDUCT OF THE STUDY; REGULATORY MATTERS	6
	2.1	Overview	6
	2.2	Sponsor	6
	2.3	Collaboration IND; Protocol.	6
	2.4	Enrollment	6
	2.5	Project Participants	6
	2.6	Regulatory Matters.	7
	2.7	Adverse Experience Reporting.	7
	2.8	Documentation, Updates and Final Study Report.	8
	2.9	Costs	8
	2.10	Additional Studies.	9
	ARTICLE 3	GOVERNANCE	9
	3.1	Joint Development Committee.	9
	3.2	Data Review Committee.	11
	3.3	Data Monitoring Committee	11
	ARTICLE 4	SUPPLY OF STUDY DRUGS	11
	4.1	Humanigen Investigational Product.	11
	4.2	Insufficient Quantities	12
	4.3	Quality Agreement	12
	4.4	Mutual Obligations.	12
	ARTICLE 5	STUDY DATA; SAMPLE ANALYSES AND SAMPLE DATA	13
	5.1	Study Data	13
	5.2	Samples and Sample Analyses.	13
	5.3	Sample Data.	13
	ARTICLE 6	INTELLECTUAL PROPERTY	14
	6.1	Ownership and Use; Definitions.	14
	6.2	Mutual Freedom to Operate .	15
	6.3	Patent Prosecution and Maintenance of Collaboration Inventions	16
	6.4	Third Party Infringement and Patent Enforcement or Defense.	17
	ARTICLE 7	CONFIDENTIALITY	17
	7.1	Ownership of Confidential Information.	17
	7.2	Disclosure and Use of Confidential Information.	18
	7.3	Authorized Disclosures	19

 

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Table of Contents

(continued)

 

Page

 

	7.4	Termination of Prior Agreement 	19
	ARTICLE 8	PUBLIC DISCLOSURES; USE OF NAMES	20
	8.1	CLINICAL TRIALS REGISTRIES	20
	8.2	Publications and Presentations.	20
	8.3	Press Releases and Other Public Disclosures.	20
	8.4	Use of Names	21
	ARTICLE 9	HUMAN SUBJECTS	21
	9.1	Informed Consent	21
	9.2	IRB Approval	22
	9.3	Patient Privacy and Data Protection	22
	9.4	Financial Disclosures	22
	9.5	Transparency	22
	ARTICLE 10	SUBCONTRACTING; RECORDS	22
	10.1	Subcontracting	22
	10.2	Records.	23
	ARTICLE 11	COMPLIANCE WITH LAWS	23
	11.1	Compliance with Laws and Policies	23
	11.2	Debarment	23
	ARTICLE 12	TERM; TERMINATION	23
	12.1	Term	23
	12.2	Termination for Material Breach	23
	12.3	Termination for Other Reasons	24
	12.4	Effects of Termination or Expiration.	24
	ARTICLE 13	REPRESENTATIONS AND WARRANTIES	24
	13.1	Mutual Representations and Warranties	24
	13.2	Disclaimers	25
	ARTICLE 14	INDEMNIFICATION; LIMITATION ON LIABILITY; INSURANCE	25
	14.1	Indemnification.	25
	14.2	Limitation on Liability	26
	14.3	Insurance.	26
	ARTICLE 15	DISPUTE RESOLUTION	27
	15.1	Internal Resolution	27
	15.2	Dispute Resolution and Jurisdiction	27
	ARTICLE 16	MISCELLANEOUS	27

 

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Table of Contents

(continued)

 

Page

 

	16.1	Notices	27
	16.2	Assignment.	28
	16.3	Force Majeure	28
	16.4	Relationship of the Parties	28
	16.5	Amendment; Waiver	28
	16.6	Construction; Captions	28
	16.7	Severability	29
	16.8	Entire Agreement	29
	16.9	Counterparts; Facsimiles	29

 

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CLINICAL
COLLABORATION AGREEMENT

 

 

This
Clinical Collaboration Agreement (“Agreement”) is made and entered into, effective as of May
30, 2019 (“Effective Date”), by and between Humanigen, Inc.,
a Delaware corporation, having a principal place of business at 533 Airport Boulevard, Suite 400, Burlingame, CA 94010
(“Humanigen”) and Kite Pharma, Inc., a Delaware
corporation, having a place of business at 2400 Broadway, Santa Monica, CA 90404 (“Kite”). Humanigen
and Kite are each referred to herein individually as a “Party”
and collectively as the “Parties.”

 

Recitals

 

A.       Humanigen
is developing the anti-GMCSF antibody Humanigen Investigational Product (defined below) for the prevention of neurotoxicity and
cytokine release syndrome related to CAR-T and potentially other therapies;

 

B.       Kite
is developing the Kite Investigational Product (defined below) for the treatment of certain blood cancers;

 

C.       Based
on a hypothesis that certain CAR-related neurologic events may be reduced after treatment of Kite Investigational Product and sequential
prophylaxis with an anti-GMCSF antibody, Kite wishes to conduct a Phase I/II clinical study evaluating the incidence of neurologic
events when Kite Investigational Product is used with Humanigen Investigational Product in patients with relapsed/refractory large
B cell lymphoma; and

 

D.       Humanigen
and Kite, consistent with the terms of this Agreement, desire to collaborate as more fully described herein, including by providing
the Humanigen Investigational Product to Kite for the conduct of the Study described herein.

 

Agreement

 

Now,
Therefore, for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Humanigen
and Kite agree as follows:

 

Article
1

DEFINITIONS

 

Capitalized terms used
in this Agreement shall have the meanings set forth below, unless otherwise specifically indicated.

 

1.1       “Affiliate”
of a Party means any corporation or other business entity that, directly or indirectly, through one or more intermediaries, controls,
is controlled by, or is under common control with such Party. For purposes of this definition, the term “control”
(including, the correlative meanings, “controlled by” and “under common control with”)
means (a) the direct or indirect ownership of more than fifty percent (50%) of the stock having the right to vote for directors
thereof (or general partnership interests) or (b) the ability to otherwise control the decisions of the board of directors or equivalent
governing body thereof.

 

1.2       “Ancillary
Agreements” means the Supply Agreement, Quality Agreement, PV Agreement, and other operational agreements to be entered
into by the Parties after the Effective Date, including without limitation, an agreement to track financial disclosures pursuant
to Section 9.4

 

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1.3       “Applicable
Law” means all (a) federal, state, local, national and regional statutes, laws, rules, regulations and directives
applicable to a particular activity under this Agreement (including the performance of clinical trials and medical treatment) that
may be in effect from time to time (including GCP, GLP, GMP and other laws promulgated by Regulatory Authorities); (b) applicable
data protection and patient privacy laws and requirements (including those specified in the EU General Data Protection Regulation
and the regulations issued under HIPAA); (c) export control and economic sanctions regulations that prohibit the shipment of United
States-originated products and technology to certain restricted countries, entities and individuals; (d) anti-bribery and anti-corruption
laws pertaining to interactions with government agents, officials and representatives (including the United States Foreign Corrupt
Practices Act); (e) laws and regulations governing payments to healthcare providers; (f) laws and requirements governing ineligibility
to participate in federal, state or other healthcare programs (including debarment under 21 USC § 335a, disqualification under
21 CFR §312.70 or § 812.119, sanctions by a Federal Health Care Program (as defined in 42 USC § 1320a-7b(f)), including
the federal Medicare or a state Medicaid program); and (g) successor or replacement statutes, laws, rules, regulations and directives
relating to the foregoing.

 

1.4       “Background
IP” is defined in Section 6.2(d).

 

1.5       “Biologics
License Application” or “BLA” means a biologics license application filed or to be filed
with the FDA as described in 21 CFR Part 601, or the equivalent filing with a relevant Regulatory Authority in any jurisdiction
(including a marketing authorization application filed or to be filed with the EMA or Health Canada), together with any amendments,
supplements or other additions or deletions thereto.

 

1.6       “Business
Day” means a day, other than a Saturday, Sunday or day on which commercial banks located in Santa Monica, California
are authorized or required by law or regulation to close.

 

1.7       “Case
Report Form” means the form (whether paper or electronic) for collecting certain data about each Subject, including
the data collected for such Subject.

 

1.8       “CFR”
means the United States Code of Federal Regulations.

 

1.9       “Collaboration
IND” means the IND that includes the Protocol covering the Study.

 

1.10       “Collaboration
Invention” is defined in Section 6.1(c).

 

1.11       “Combination”
means the Humanigen Investigational Product and the Kite Investigational Product used in the combination or sequence as set forth
in the Protocol, but not co-formulated, together.

 

1.12       
“Confidential Information” means nonpublic information (including Know-How) (i) that is disclosed by
or on behalf of one Party to the other or its designee in connection with this Agreement (whether orally, electronically, visually
or in writing) and/or (ii) Joint Confidential Information as defined in Section 7.1(c).

 

1.13       “CRO”
means a Third Party service provider (e.g., a person or organization) that assumes one or more obligations of the Sponsor, in accordance
with Title 21 of the CFR, or the equivalent assumption of obligations in a jurisdiction other than the United States.

 

1.14       “Database
Lock” means the database lock of the Study Data after Study Completion.

 

1.15       “Data
Review Committee” or “DRC” is defined in Section 3.2(a).

 

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1.16       “EMA”
means, collectively, the European Medicines Agency and the European Commission (with respect to its functions related to marketing
authorizations for medicinal products), or any successor entity thereto performing similar functions.

 

1.17       “FDA”
means the United States Food and Drug Administration, or any successor entity thereto performing similar functions.

 

1.18       “Final
Study Report” is defined in Section 2.8(c).

 

1.19       “GCP”
means, as to the United States and the European Union, applicable good clinical practices (for the design, conduct, performance,
monitoring, auditing, recording, analyses, and reporting of clinical trials that provides assurance that the data and reported
results are credible and accurate, and that the rights, integrity, and confidentiality of trial subjects are protected) in effect
in the United States and the European Union, respectively, during the term of the Agreement and, with respect to any other jurisdiction,
clinical practices equivalent to good clinical practices then in effect in the United States or the European Union.

 

1.20       “GLP”
means, as to the United States and the European Union, applicable good laboratory practices in effect in the United States and
the European Union, respectively, during the term of the Agreement and, with respect to any other jurisdiction, laboratory practices
equivalent to good laboratory practices then in effect in the United States or the European Union.

 

1.21       “GMP”
means, as to the United States and the European Union, applicable good manufacturing practices in effect in the United States and
the European Union, respectively, during the term of the Agreement and, with respect to any other jurisdiction, manufacturing practices
equivalent to good manufacturing practices then in effect in the United States or the European Union.

 

1.22       “HIPAA”
means, collectively, the United States Health Insurance Portability and Accountability Act of 1996, and the regulations promulgated
thereunder, as amended from time to time.

 

1.23       “Humanigen
Investigational Product” means lenzilumab in final form for administration to Subjects in the Study.

 

1.24       “Humanigen
Owned Invention” is defined in Section 6.1(b)(ii).

 

1.25       
“IND” means an investigational new drug application filed or to be filed with the FDA as described in
21 CFR Part 312, or the equivalent filing with a relevant Regulatory Authority in any jurisdiction (including an investigational
medicinal product dossier filed or to be filed with the EMA or a clinical trial application filed or to be filed with Health Canada),
together with any amendments, supplements or other additions or deletions thereto.

 

1.26       “Invention”
means any invention, discovery or creation (including materials and Know-How but excluding Study Data and Sample Data)
that is first conceived, reduced to practice, discovered or otherwise created by a Party (directly or by a Third Party on its behalf)
or jointly by the Parties, in each case, (i) in the course of, or as a result of, conducting and providing support for the Study;
(ii) through use of the Study Data or the Sample Data; or (iii) through use of the Samples.

 

1.27       “Investigational
Products” means the Humanigen Investigational Product and the Kite Investigational Product. An “Investigational
Product” means either the Humanigen Investigational Product or the Kite Investigational Product, as applicable.

 

1.28       
“Investigator” is defined in 21 CFR § 312.3(b) and, under this Agreement, means an individual who
conducts the Study at a Participating Site in any jurisdiction.

 

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1.29       “IRB”
means an institutional review board as described in 45 CFR Part 46, or the equivalent entity (such as an independent ethics committee)
in any jurisdiction.

 

1.30       “JDC
Chair” is defined in Section 3.1(a).

 

1.31       “JDC
Co-Leader” is defined in Section 3.1(a).

 

1.32       “Joint
Development Committee” or “JDC” is defined in Section 3.1(a).

 

1.33       “Joint
Patent” is defined in Section 6.3(a).

 

1.34       “Kite
Investigational Product” means axicabtagene ciloleucel (“axi-cel”) in final form for administration to
Subjects in the Study.

 

1.35       “Kite
Owned Invention” is defined in Section 6.1(b)(i).

 

1.36       “Know-How”
means all information, unpatented inventions (whether or not patentable), improvements, practices, formula, trade secrets, techniques,
methods, procedures, knowledge, results, test data (including pharmacological, toxicological, pharmacokinetic and pre-clinical
and clinical information and test data, related reports, structure-activity relationship data and statistical analysis), analytical
and quality control data, protocols, processes, models, designs, and other information regarding research, discovery, development,
marketing, pricing, distribution, cost, sales and manufacturing. Know-How shall not include any Patents.

 

1.37       “NDA”
means a new drug application filed or to be filed with the FDA as described in 21 CFR Part 314, or the equivalent filing with a
relevant Regulatory Authority in any jurisdiction (including a marketing authorization application filed or to be filed with the
EMA or Health Canada), together with any amendments, supplements or other additions or deletions thereto.

 

1.38       “Participating
Site” means a hospital or other institution participating in the Study.

 

1.39       “Patents”
means all patents and patent applications and any patents issuing therefrom or claiming priority thereto in any country, including
any reissues, extensions, supplementary protection certificates, registrations, divisions, continuations, continuations-in-part,
reexaminations, substitutions or renewals thereof.

 

1.40       “Project
Participants” means Investigators, Subinvestigators, Participating Sites, CROs, drug distributors, vendors and subcontractors
or agents of Kite (or its Affiliates), who conduct or assist in conducting the Study or provide related services.

 

1.41       “Prosecution
and Maintenance” or “Prosecute and Maintain” with regard to a given Patent, means the preparation,
filing, prosecution and maintenance of such Patent, as well as any ex parte and inter partes proceedings, including reexaminations,
reissues, applications for patent term extensions, interferences, derivation proceedings, post-grant review proceedings, oppositions
and other similar administrative proceedings with respect to such Patent.

 

1.42       “Protocol”
means the protocol to be based on the Kite protocol synopsis attached hereto as Exhibit A, titled “A Phase1/2 Open-Label,
Multicenter Study Evaluating the Incidence of Neurologic Events after Axicabtagene Ciloleucel as a Combination Therapy with Lenzilumab
in Subjects with Refractory Large B-Cell Lymphoma” which shall be approved and may be amended by the JDC in accordance
with this Agreement. The Kite protocol synopsis (Exhibit A), Protocol and Study design is Kite Confidential Information.

 

1.43       “PV
Agreement” is defined in Section 2.7(a).

 

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1.44       “Quality
Agreement” is defined in Section 4.3.

 

1.45       “Regulatory
Authority” means (a) the FDA; (b) the EMA; or (c) any regulatory authority or body performing similar functions in
any jurisdiction anywhere in the world.

 

1.46       “Regulatory
Documentation” means any document submitted to a Regulatory Authority, including all INDs, NDAs, BLAs, drug master
files, correspondence with Regulatory Authorities, periodic safety update reports, adverse event files, complaint files, inspection
reports and manufacturing records.

 

1.47       “Sample
Analyses” is defined in Section 5.2(b).

 

1.48       “Sample
Analysis Plan” means the plan, attached as Exhibit C, that outlines the Sample Analyses to be performed by
Kite or Humanigen and the priority for performing such Sample Analysis. The Sample Analysis Plan (Exhibit C) is Kite Confidential
Information.

 

1.49       “Sample
Data” is defined in Section 5.3(a).

 

1.50       “Samples”
is defined in Section 5.2(a).

 

1.51       “Specifications”
means, with respect to an Investigational Product, the set of requirements for such Investigational Product set forth in the Quality
Agreement.

 

1.52       “Sponsor”
is defined in 21 CFR § 312.3(b) and, under this Agreement, means the entity that takes responsibility for and initiates the
Study in any jurisdiction.

 

1.53       “Study”
means the Phase I/II clinical study to be sponsored and conducted by Kite as set forth in the Protocol. The principal purpose of
the Study is to evaluate the incidence of neurologic events after treatment of Kite Investigational Product in Combination with
Humanigen Investigational Product, consistent with the requirements further described in 21 CFR § 312.21(a) & (b) (as
may be amended) or foreign counterpart thereto, or a similar clinical study in a country other than the United States.

 

1.54       “Study
Completion” means the last Subject visit specified in the Protocol for primary endpoint evaluation.

 

1.55       “Study
Data” means all data (including raw data), Case Report Forms, findings, conclusions and other results from the Study
and the Final Study Report, including investigator reports (both preliminary and final), statistical analyses and expert opinions
and reports. Study Data excludes Sample Data.

 

1.56       “Subinvestigator”
is defined in 21 CFR § 312.3(b) and, in the event the Study is conducted by a team at a Participating Site, means an individual
designated by the Investigator to be the responsible leader of such team.

 

1.57       “Subject”
is defined in 21 CFR § 312.3(b) and, under this Agreement, means a human who participates in the Study in any jurisdiction.

 

1.58       “Supply
Agreement” is defined in Section 4.1.

 

1.59       “Third
Party” means any person or entity other than a Party or its Affiliates.

 

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Article
2

CONDUCT OF THE STUDY; REGULATORY MATTERS

 

2.1       Overview.
Kite has the hypothesis that there may potentially be a reduction in the incidence of CAR-related inflammatory events, such as
neurologic events, after treatment with axicabtagene ciloleucel (Kite Investigational Product) and sequenced prophylaxis with an
anti-GMCSF antibody in subjects with relapsed/ refractory large B-cell lymphoma. Kite now wishes to evaluate the hypothesis by
conducting the Study under this Agreement, with support from Humanigen as described herein.

 

2.2       Sponsor.
Kite shall be the Sponsor of the Study. Kite shall use commercially reasonable efforts to conduct, and use commercially reasonable
efforts to cause all Project Participants to conduct, the Study in accordance with this Agreement, the Protocol and Applicable
Law. Kite shall be responsible for obtaining all approvals and clearances necessary to conduct the Study, including approvals from
Regulatory Authorities, IRBs and customs clearances. In no event shall Humanigen be deemed a Sponsor of the Study.

 

2.3       Collaboration
IND; Protocol.

 

(a)       Collaboration
IND. Kite shall maintain the Collaboration IND and will likewise maintain, or prepare and file (as applicable) any investigational
medicinal product dossier(s), clinical trial application(s), or similar applications, necessary for the approval of the Study outside
the United States, subject to co-ownership rights to jointly owned Study Data, jointly owned Sample Data, and jointly owned Collaboration
Inventions. Subject to the ownership provisions of Sections 2.6(c), 5.1, 5.3, and 6.1(c), Kite shall own all right, title and interest
in and to the Collaboration IND, investigational medicinal product dossier(s) or clinical trial application(s) (as the case may
be), and related Regulatory Documentation.

 

(b)       Protocol.
The Protocol for such Collaboration IND is to be mutually agreed to by the JDC and based on the Kite protocol synopsis set forth
in Exhibit A. Any amendments to the Protocol shall be reviewed and approved in accordance with Section 3.1. Subject to the
terms of this Agreement, Kite shall be responsible for preparing and filing all necessary Regulatory Documentation for the Collaboration
IND and the Study.

 

(c)       Investigator’s
Brochure. Kite shall prepare an investigator’s brochure for the Kite Investigational Product. Humanigen shall provide
to Kite an investigator’s brochure(s) (and shall immediately provide any updates) for the Humanigen Investigational Product
that pertain to safety matters and other information that may be required to keep the investigator’s brochure(s) for the
Humanigen Investigational Product up to date.

 

2.4       Enrollment.
Commencing on or after the date the PV Agreement is executed by the Parties, Kite may begin enrolling Subjects in the Study in
compliance with Applicable Law. Kite shall be responsible for tracking enrollment at Participating Sites which shall not exceed
the maximum number of Subjects specified in the Protocol, unless such number is increased by an amendment to the Protocol.

 

2.5       Project
Participants. Kite shall be solely responsible for the performance and conduct of the Project Participants, including monitoring
the conduct of the Study at the Participating Sites. Kite shall be solely responsible for negotiating and executing the necessary
agreements with all Project Participants. Kite shall reasonably determine that the compensation being paid to a Project Participant
under its agreement with Kite for the Study constitutes the fair market value of the services to be provided. In no event shall
any agreement with a Project Participant represent that Humanigen is a Sponsor of the Study.

 

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2.6       Regulatory
Matters.

 

(a)       Generally.
Kite shall comply with all lawful direction provided by Regulatory Authorities and IRBs with jurisdiction over the Study. Kite
shall perform all regulatory obligations related to the Study, including preparation and submission of Regulatory Documentation
for the Study, in accordance with the Protocol and Applicable Law.

 

(b)       Interactions
with Regulatory Authorities. Kite shall promptly provide Humanigen with a copy of any material notice, inquiry or correspondence
that Kite receives from a Regulatory Authority regarding the Study (“Material Regulatory Notice”), including
any serious safety matter related to a Party’s Investigational Product or the Combination and any inspection or investigation
by a Regulatory Authority. Humanigen shall have the right (but not the obligation) to provide comments to any response to such
Material Regulatory Notice, to the extent such Material Regulatory Notice is related to either the Combination or the Humanigen
Investigational Product, and to participate in any discussions with a Regulatory Authority relating to such Material Regulatory
Notice, to the extent permitted by such Regulatory Authority. Notwithstanding the aforementioned, if a Material Regulatory Notice
is directed at the Humanigen Investigational Product, then Humanigen will immediately review and respond to Kite with all necessary
information to address the Material Regulatory Notice. Furthermore, without limiting Humanigen’s obligations under Section
2.6(c), Humanigen shall promptly provide Kite with a copy of any material notice, inquiry or correspondence that Humanigen or its
Affiliate receives from a Regulatory Authority regarding the Humanigen Investigational Product that would reasonably have an impact
on the conduct of the Study, including without limitation, any serious safety matter related to the Humanigen Investigational Product.
In addition to Material Regulatory Notices, Kite may conduct other meetings with Regulatory Authorities relating to the Study,
and at the JDC’s discretion, invite Humanigen to observe and/or contribute to Kite’s interactions with Regulatory Authorities.
The Parties shall keep confidential the nature and substance of such Kite’s discussions with Regulatory Authorities, and
any Confidential Information or Joint Confidential Information exchanged in such discussions shall at all times be subject to the
terms of this Agreement.

 

(c)       Letter
of Cross-Reference. Promptly, but no later than ten (10) business days, after the Effective Date, Humanigen shall provide to
Kite a letter of cross-reference authorizing Kite to reference Humanigen INDs for the Humanigen Investigational Product as reasonably
necessary to support the Study under the existing Collaboration IND maintained by Kite. Such letter of cross-reference shall remain
in full force and effect until the end of the Term. In addition to Humanigen’s obligations to supply the Humanigen Investigational
Product under Section 4.1, Humanigen shall, promptly following Kite’s request, provide and make available to Kite any necessary
information about the Humanigen Investigational Product, including without limitation, any Humanigen Confidential Information,
to support Kite in obtaining approval to conduct the Study from Regulatory Authorities and IRBs and in conducting the Study. Further,
Humanigen shall provide reasonable assistance to Kite to support Kite’s interactions with Regulatory Authorities and IRBs
in connection with the Study. Neither Party shall have any rights to use the other Party’s solely owned Confidential Information
or Joint Confidential Information, except as otherwise expressly provided in this Agreement, including this Section 2.6(c), Section
5.1(b), Section 5.3(b), Article 7, and Article 8, and such permitted uses do not grant any right or license or transfer ownership
to either Party under any of the other Party’s information (including without limitation Confidential Information). Notwithstanding
the foregoing, while a Party may have rights to use solely owned Confidential Information or Joint Confidential Information as
expressly set forth in this Agreement, in no event shall any Party disclose, disseminate or otherwise share the other Party’s
solely owned Confidential Information or Joint Confidential Information with any Third Party except as expressly authorized in
Articles 7 or 8, without the express written consent of such other Party.

 

2.7       Adverse
Experience Reporting.

 

(a)       Within
ninety (90) days of executing this Agreement, and in any event prior to the in the initiation of any clinical Study activities,
including enrollment of the first Study subject, the Parties shall enter into a pharmacovigilance agreement setting forth the Parties’
responsibilities and obligations with respect to the procedures and timeframes for compliance with Applicable Law pertaining to
safety reporting of the respective Investigational Products and the Combination (“PV Agreement”). Such
PV Agreement will ensure that adverse event and other safety information is exchanged according to a schedule that will permit
each Party to comply with Applicable Laws, including any local regulatory requirements. Kite will be responsible for fulfilling
all regulatory reporting obligations with regard to the Study and the Collaboration IND and such requirements will be documented
in the PV Agreement.

 

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(b)       Kite
shall be responsible for reporting adverse events from the Study to Regulatory Authorities in accordance with Applicable Law, including
21 CFR § 312.32.

 

2.8       Documentation,
Updates and Final Study Report.

 

(a)       Documentation.
Each Party shall maintain reports and documentation arising in connection with the Study in a good scientific manner and in compliance
with Applicable Law. Each Party shall provide to the other Party all such reports and documentation arising from the Study (including
reports of interim analyses, if applicable) reasonably requested to enable each Party to comply with any of its legal, regulatory
and/or contractual obligations, or in response to any request by a Regulatory Authority.

 

(b)       Updates.
Kite shall provide written updates regarding the status of the Study (including enrollment status, project timelines, Humanigen
Investigational Product inventory and Humanigen Investigational Product forecasting) to Humanigen on a quarterly basis within forty-five
(45) days of the end of each calendar quarter. Following receipt of such written update, Humanigen may request that Kite make available
Kite personnel responsible for the Study on a reasonable basis to address Humanigen’s questions regarding such written update,
either in person or by telephone; provided, however, that Kite shall have no obligation to conduct any unplanned Study Data cuts
to address any such Humanigen questions unless necessary and required to address a material safety concern. Humanigen shall provide
a list of questions and/or topics for discussion in advance of such meeting.

 

(c)       Final
Study Report. Kite shall complete the Study as outlined in the Protocol. Kite shall summarize the findings of the Study in
a Final Study Report. Kite shall provide the Final Study Report to Humanigen within six (6) months after Database Lock, subject
to complete payment of all Kite invoices by Humanigen. “Final Study Report” means a formal clinical study
report documenting and summarizing the results and interpretation of the Study, including the trial design, trial objectives, patient
assessment, data analysis, results, risk/benefit analysis, safety and effectiveness, in accordance with the requirements of then-existing
Regulatory Authority rules, regulations and guidance on the structure and content of clinical study reports.

 

2.9       Costs.
Each Party shall share equally (fifty percent (50%) each) in all out-of-pocket expenses actually incurred in conducting the Study,
including but not limited to expenses for CROs, Third Party testing and analysis service providers and central labs, Sample Analysis,
Participating Sites, patient screening, imaging and care, clinical data management, statistical analysis, data safety monitoring
and advisory boards, investigator meetings, and shipping of patient materials to and from a manufacturing site, in accordance with
the mutually agreed budget as set forth in Exhibit B attached hereto, as may be amended from time to time by the unanimous
agreement of the JDC (as defined below). For clarity, such expenses shall not include any expenses incurred for the raw materials
of an Investigational Product and for the manufacturing and processing of an Investigational Product by a Party or any of its contractors.
Each Party shall perform its obligations under this Agreement and will be responsible for all other indirect costs at its own cost
and expense, including internal FTE and overhead costs. Thirty (30) days prior to the initiation of the Study (with such date to
be determined by the JDC), Humanigen shall pay to Kite an amount equal to Two Million Dollars (US$2,000,000), which is approximately
equal to fifty percent (50%) of the out-of-pocket costs to be incurred in the conduct of the Study for eighteen (18) Subjects to
be dosed. In the event the Study is terminated prior to 18 Subjects being dosed, Kite agrees to reconcile the funds received from
Humanigen against the out-of-pocket costs and non-cancellable expenses actually incurred up to the date of Study termination, and
refund Humanigen that amount. Once 18 Subjects have been dosed, within thirty (30) days prior to the first day of each subsequent
calendar quarter thereafter until Study Completion, Kite shall invoice Humanigen an amount equal to fifty percent (50%) of the
anticipated out-of-pocket costs to be incurred in conducting the Study for the upcoming calendar quarter, as reasonably forecasted
by Kite, and Humanigen shall pay all such invoices within thirty (30) days of receipt of such invoice from Kite. Any excess amounts
paid by Humanigen to Kite hereunder will be refunded to Humanigen within sixty (60) days of Study Completion.

 

    	 	 8	 

    	 

    

 

2.10       Additional
Studies.

 

(a)       Using
Combination. After completing the Study, if one Party (“Proposing Party”) wishes to conduct one or
more additional studies that include the other Party’s Investigational Product (“Additional Study(ies)”),
the Proposing Party will provide the other Party with a protocol summarizing the Additional Study(ies) (“Additional
Study Plan(s)”), and the opportunity to participate, at least six (6) months prior to initiating any Additional
Studies. If the other Party decides to not participate in the Additional Study(ies), the Proposing Party may proceed alone on the
Additional Study Plan(s) at its own expense, provided the Additional Studies are approved by regulatory authorities, and provided
further that the non-Proposing Party will be under no obligation to provide any support, Investigational Products or materials
to the Proposing Party for such Additional Study(ies). The Parties shall discuss providing supply of its respective Investigational
Product for an Additional Study, provided that neither Party shall be obligated to supply its Investigational Product for any Additional
Study.

 

(b)       Other
Studies. Nothing in this Agreement shall (a) prohibit either Party from performing any additional studies relating to its own
Investigational Product, either individually or in combination with any other compound or product, in any therapeutic area or (b)
create an exclusive relationship between the Parties with respect to either Investigational Product.

 

Article
3

GOVERNANCE

 

3.1       Joint
Development Committee.

 

(a)       Establishment
of the JDC. Within thirty (30) days after the Effective Date, the Parties shall establish a Joint Development Committee (“Joint
Development Committee” or “JDC”) to oversee the Study. The JDC shall be composed of at
least two (2), but no more than three (3) representatives designated by each Party (and the Parties need not have the same number
of representatives). The representatives shall be appropriate (in terms of their seniority, availability, function in their respective
organizations, training and experience) for the activities then being undertaken. Each Party shall designate one of its representatives
as its primary JDC contact for JDC matters (each, a Party’s “JDC Co-Leader”). Kite’s JDC
Co-Leader shall chair the Joint Development Committee (“JDC Chair”), including scheduling JDC meetings
and setting meeting agendas. A Party may replace any or all of its representatives (and designated JDC Co-Leader) at any time by
informing the other Party’s JDC Co-Leader in advance, in writing (which may be by email). The JDC shall exist during the
Term, unless otherwise mutually agreed by the Parties in writing.

 

(b)       Responsibilities
of the JDC. The Joint Development Committee shall be responsible for the following activities:

 

(i)       reviewing
and approving the Protocol and any subsequent amendments to the Protocol;

 

(ii)       reviewing
and amending the budget as may be reasonably necessary to reflect changes in the Study;

 

(iii)       approving
Participating Sites and Investigators;

 

    	 	 9	 

    	 

    

 

(iv)       reviewing
the progress of the Study;

 

(v)       establishing
the Data Review Committee (as described in Section 3.2) and deciding whether and how to address its recommendations;

 

(vi)       evaluating
and determining how to address any safety matters related to the Combination;

 

(vii)       reviewing
the progress of the Sample Analysis Plan, including determining the timing for Sample Analysis to be performed by a Party and the
transfer of results to the other Party;

 

(viii)       coordinating
the transfer of materials and information between the Parties, including the Study Data, the Final Study Report, the Samples and
the Sample Data;

 

(ix)       addressing
any issues that may arise in the event of a shortage of supply of Humanigen Investigational Product for the Study, subject to Section
4.1;

 

(x)       attempting
to resolve any Disputes related to the Study; and

 

(xi)       performing
such other functions as appropriate to further the purposes of the Study, or as otherwise specified in this Agreement.

 

(c)       Unanimous
Decisions. Actions and decisions to be taken by the JDC shall be made only following a unanimous vote, with each Party’s
representatives on the JDC having collectively one (1) vote, provided that, Kite’s JDC representatives shall have the final
decision making authority with respect to (i) operational matters in conducting the Study, including selecting Participating Sites,
Investigators and CROs, and (ii) amendments to the Protocol that do not directly relate to the Humanigen Investigational Product
or the part of the Combination that consists of the Humanigen Investigational Product, in each case that does not result in an
increase in the mutually agreed upon budget by fifteen percent (15%). For clarity, Kite’s JDC representatives shall not have
final decision making authority with respect to matters directly related to the Humanigen Investigational Product or the part of
the Combination that consists of the Humanigen Investigational Product, and Humanigen’s JDC representatives shall not have
final decision making authority with respect to matters directly related to the Kite Investigational Product or the part of the
Combination that consists of the Kite Investigational Product. If the JDC cannot reach unanimous agreement within fifteen (15)
Business Days of a matter being brought to a vote not otherwise addressed by this Section 3.1(c), either Party may refer the dispute
to the Parties’ executives for resolution in accordance with Section 15.1. The JDC has no authority to amend, or to waive
compliance with, any provisions of this Agreement.

 

(d)       Meetings;
Attendees; Decisions. Once established, the Joint Development Committee shall meet at least once each calendar quarter. The
JDC may meet in person or via teleconference, video conference or the like, provided that at least one (1) meeting per calendar
year shall be held in person (unless otherwise agreed by the Parties). Each Party shall bear the expense of its respective representatives’
participation in JDC meetings. If a Party’s representative is unable to attend a given meeting, such Party may designate
a knowledgeable alternate to attend such meeting and perform the functions of such representative. Each Party may invite a reasonable
number of non-voting employees, consultants or scientific advisors to attend JDC meetings, provided that such invitees are bound
by appropriate confidentiality obligations. The JDC shall maintain written minutes of each JDC meeting, including all decisions
made, action items assigned or completed and other appropriate matters. The JDC Chair shall prepare the initial draft minutes and
provide the Humanigen Co-Leader with ten (10) business days for Humanigen to review and approve such minutes.

 

    	 	 10	 

    	 

    

 

(e)       Sub-Teams;
Designees. From time to time, the Joint Development Committee may establish sub-teams to oversee particular projects or activities,
and such sub-teams will be constituted and operate as determined by the JDC. From time to time, the JDC may designate individuals
(by name or function) to oversee activities, and such designees will perform such activities as determined by the JDC. The JDC
also reserves the right to discontinue sub-teams.

 

3.2       Data
Review Committee.

 

(a)       Establishment
of the DRC; Meetings. Under the direction of the Joint Development Committee, the Parties may establish a Data Review Committee
(“Data Review Committee” or “DRC”) to monitor the safety of the Investigational
Products being used in the Study. The DRC shall be composed of (i) at least one clinician designated by Humanigen familiar with
the therapeutic profile of the Humanigen Investigational Product; (ii) at least one clinician designated by Kite familiar with
the therapeutic profile of the Kite Investigational Product; and (iii) if the Parties agree to include one or more Third Party
clinicians, such individuals shall be acceptable to both Parties, and shall be bound by appropriate confidentiality and invention
assignment obligations. The DRC shall meet at least once each calendar quarter or at such other times as deemed appropriate by
the Parties and on an ad hoc basis as necessary during the Study.

 

(b)       Responsibilities
of the DRC. The Data Review Committee shall be responsible for performing the following functions:

 

(i)       evaluating
suspected dose-limiting toxicities (using criteria defined in the Protocol, if applicable) and adjudicating treatment related adverse
events, based on clinical experience with the Investigational Products;

 

(ii)       making
recommendations to the JDC to hold dosing or enrollment, if safety data require further evaluation;

 

(iii)       making
recommendations to the JDC to end dosing or enrollment; and

 

(iv)       performing
such other functions as directed by the JDC.

 

(c)       Advisory
Body. The Data Review Committee shall be solely an advisory body to the JDC and shall not have any power to make decisions
that bind either Party.

 

3.3       Data
Monitoring Committee. The Parties may establish a data monitoring committee, of independent clinician(s) agreed to by the Parties,
to make safety recommendations about the safety of the Study to the JDC.

 

Article
4

SUPPLY OF STUDY DRUGS

 

4.1       Humanigen
Investigational Product.

 

(a)       Manufacture
and Supply. Promptly following the Effective Date, but in no event later than sixty (60) days following the Effective Date,
Humanigen and Kite will enter into a supply agreement (the “Supply Agreement”) which will set out the
quantities of the Humanigen Investigational Product that Humanigen will supply, or cause to be supplied (including setting aside
a reserve of Humanigen Investigational Product in case of unanticipated or unforeseen shortages, or in the event of dissolution
or insolvency), and the timelines for such supply, in each case, for use in the Study, including any extensions thereto. Humanigen
shall supply Humanigen Investigational Product for use in the Study, at its expense, and in the quantities specified in the Supply
Agreement. Humanigen represents and warrants to Kite that: (i) Humanigen shall supply Humanigen Investigational Product to reach
Study Completion; (ii) such Humanigen Investigational Product shall be manufactured in compliance with: the Specifications for
the Humanigen Investigational Product, Applicable Law and the Quality Agreement. Humanigen or its designee will deliver Humanigen
Investigational Product to (i) Kite or (ii) a Project Participant as designated by Kite or the Joint Development Committee (for
purposes of Section 4.1(b), “Delivery Locations”).

 

    	 	 11	 

    	 

    

 

(b)       Delivery.
Humanigen shall deliver the Humanigen Investigational Product to the Delivery Locations in accordance with the Quality Agreement
and the timelines specified in the Supply Agreement or determined by the Joint Development Committee.

 

(c)       Remaining
Investigational Product. Upon completion or termination of the Study, Kite shall use commercially reasonable efforts to have
all unused quantities of Humanigen Investigational Product, as well as all used vials and bottles containing the Humanigen Investigational
Product, returned to Humanigen or destroyed (as directed by Humanigen, and at Humanigen’s cost) and documented accordingly.

 

(d)       Use
of Humanigen Investigational Product. From the Effective Date until the first to occur of Study Completion or any earlier termination
of the Study, Kite has the right to use the Humanigen Investigational Product for the purpose of conducting the Study, including
without limitation, to perform any analytical methods validation transfer, if required, and shall use the Humanigen Investigational
Product solely for such purpose. Kite shall use, store, transport, handle and dispose of the Humanigen Investigational Product
in compliance with Applicable Law, the Quality Agreement and all reasonable instructions from Humanigen. Kite shall not use the
Humanigen Investigational Product for any research, development or commercial purpose, other than for the Study; Kite shall not
attempt to derive or reverse engineer the composition or underlying information or structure of the Humanigen Investigational Product,
and in particular shall not analyze the Humanigen Investigational Product by physical, biological, chemical or biochemical means,
except as necessary to perform its obligations under the Quality Agreement.

 

4.2       Insufficient
Quantities. In the event that Humanigen determines that there are insufficient quantities of the Humanigen Investigational
Product to reach Study Completion, Humanigen shall promptly provide written notice to Kite, including what quantities or manufacturing
capacity of its Humanigen Investigational Product, if any, are available for the Study. The JDC will promptly discuss how to address
the shortage and allocate the available amounts of Humanigen Investigational Product manufacturing capacity.

 

4.3       Quality
Agreement. Within sixty (60) days of executing this Agreement, the Parties shall enter into a quality agreement establishing
the quality requirements for Humanigen Investigational Product (“Quality Agreement”). In the event of
a conflict between the Quality Agreement and this Agreement, this Agreement shall govern and control, unless otherwise expressly
provided in the Quality Agreement.

 

4.4       Mutual
Obligations.

 

(a)       Each
Party shall (directly or through its subcontractor, subject to Section 10.1) obtain and maintain all regulatory approvals (including
facility licenses) required to manufacture its respective Investigational Product in compliance with Applicable Law.

 

(b)       Each
Party shall notify the other Party as promptly as possible in the event any manufacturing delay (or other event) is likely to adversely
affect its ability to fulfill its obligations to supply its Investigational Product under this Agreement.

 

(c)       For
clarity, this Agreement does not create any obligation on the part of either Party to provide its Investigational Product for any
activities or purposes other than to conduct the Study.

 

    	 	 12	 

    	 

    

 

Article
5

STUDY DATA; SAMPLE ANALYSES AND SAMPLE DATA

 

5.1       Study
Data.

 

(a)       Database;
Analysis. Kite shall maintain all Study Data in its database in accordance with Applicable Law. Prior to Study Completion,
Kite shall provide Study Data summaries and interim clinical study reports to Humanigen in accordance with the timelines to be
determined by the JDC. Following Study Completion, Kite shall lead and coordinate the analysis of Study Data, with Humanigen support
and involvement. Kite shall provide such Study Data to Humanigen via electronic data transfer, in SAS format or as otherwise agreed
by the Parties, in conjunction with the Final Study Report.

 

(b)       Ownership
and Use of Study Data. Kite shall solely own all Study Data that relate solely to the Kite Investigational Product. Humanigen
shall solely own all Study Data that relate solely to the Humanigen Investigational Product. Except to the extent otherwise agreed
in writing by an authorized representative of each Party, each Party shall use the other Party’s Study Data only for the
purposes of: (i) seeking regulatory approval for the use of its Investigational Product in the Combination, and (ii) filing and
Prosecuting Patent applications for Collaboration Inventions and enforcing any resulting Patents in accordance with Article 6.
The Parties shall jointly own Study Data that relate solely to the Combination, and not solely to an Investigational Product. Such
jointly owned Study Data shall be deemed Joint Confidential Information. Each Party has the right to use the jointly owned Study
Data for any lawful purpose; provided, however, each Party’s use of the jointly owned Study Data is subject to: (i)
Section 6.3(e), (ii) the limitations on disclosure of the other Party’s Confidential Information in Section 2.6(c) and Article
7, (iii) the limitations on disclosure of Joint Confidential Information in Section 2.6(c) and Article 7; (iv) Article 8; and (v)
providing written notice to the other Party of such Party’s anticipated use of the jointly owned Study Data in a timely manner
prior to such anticipated use.

 

5.2       Samples
and Sample Analyses.

 

(a)       Samples.
During the Study, Kite will direct the collection of certain biologic samples from Subjects (“Samples”),
as set forth in the Protocol.

 

(b)       Sample
Analysis. Kite shall provide to Humanigen the Samples necessary for Humanigen to perform the Sample Analysis for which Humanigen
is responsible, pursuant to the Sample Analysis Plan. Each Party, at its own expense, shall perform (directly or through an Affiliate
or Third Party acting on its behalf) the testing procedures and analyses of the Samples (together “Sample Analysis/es”)
pursuant to the sample analysis plan attached hereto as Exhibit C (“Sample Analysis Plan”), which
shall be set forth in the Protocol. The Sample Analyses shall be performed by a Party in accordance with the timeline set forth
in the Sample Analysis Plan or otherwise determined by the JDC.

 

(c)       Neither
Party shall use the Samples for any purpose other than to perform the Sample Analyses for which it is responsible, without the
prior written consent of the other Party. Humanigen shall not reverse engineer, reverse compile, disassemble or otherwise attempt
to derive the composition or underlying information, structure or ideas of the Kite Investigational Product, and in particular,
shall not analyze the Kite Investigational Product by physical, chemical or biochemical means.

 

5.3       Sample
Data.

 

(a)       Each
Party will be responsible for conducting the Sample Analysis for its own Investigational Product; the Party responsible for conducting
Sample Analysis for the Combination will be set forth in the Sample Analysis Plan. Kite and Humanigen will each generate data (including
raw data), findings, conclusions and other results in conducting such Sample Analyses for Samples obtained from the Study (“Sample
Data”). Each Party shall provide to the other Party the results and/or analysis generated in the course of performing
Sample Analyses for the Study via electronic data transfer or other format/media determined by the JDC. Such results shall be provided
to the other Party within thirty (30) days of completion of the analysis or as otherwise set forth in the Sample Analysis Plan
or otherwise agreed by the JDC.

 

    	 	 13	 

    	 

    

 

(b)       Kite
shall solely own all Sample Data that relate solely to the Kite Investigational Product. Humanigen shall solely own all Sample
Data that relate solely to the Humanigen Investigational Product. Except to the extent otherwise agreed in writing by an authorized
representative of each Party, each Party shall use the other Party’s Sample Data only for the purposes of (i) seeking regulatory
approval for the use of its Investigational Product in the Combination, and (ii) filing and Prosecuting Patent applications for
Collaboration Inventions and enforcing any resulting Patents in accordance with Article 6. Further, Kite shall have the right to
access and use Humanigen Sample Data for the purpose of performing correlative analysis(es) with the Kite Sample Data. The Parties
shall jointly own Sample Data that relate solely to the Combination, and not solely to an Investigational Product. Such jointly
owned Sample Data shall be deemed Joint Confidential Information. For clarity, and by way of example, the results of the correlative
analysis(es) to be performed by Kite with use of the Humanigen Sample Data and Kite Sample Data relates solely to the Combination,
shall be jointly owned by the Parties, and shall be deemed jointly owned Sample Data and Joint Confidential Information. Each Party
has the right to use the jointly owned Sample Data for any lawful purpose; provided, however, each Party’s use of
the jointly owned Sample Data is subject to: (i) Section 6.3(e); (ii) the limitations on disclosure of the other Party’s
Confidential Information in Section 2.6(c) and Article 7; (iii) the limitations on disclosure of Joint Confidential Information
in Section 2.6(c) and Article 7; (iv) Article 8; and (v) providing written notice to the other Party of such Party’s anticipated
use of the jointly owned Sample Data in a timely manner prior to such anticipated use.

 

Article
6

INTELLECTUAL PROPERTY

 

6.1       Ownership
and Use; Definitions.

 

(a)       Ownership
of other Inventions. Ownership of any Invention that is not a Kite Owned Invention, Humanigen Owned Invention, or Collaboration
Invention will be determined in accordance with U.S. patent law.

 

(b)       Sole
Ownership and Use of Investigational Product-Specific Inventions

 

(i)       All
Inventions that relate solely to (A) the Kite Investigational Product and uses thereof, methods of making, and modifications thereof,
including improvements thereto, or (B) the Study Data and Sample Data that is solely owned by Kite (collectively, a “Kite
Owned Invention”), and all right, title and interest therein, shall be the sole and exclusive property of
Kite. For the avoidance of doubt, any Collaboration Invention that generically encompasses the Kite Investigational Product (and
not the Humanigen Investigational Product) within its scope, even where the Kite Investigational Product is not disclosed per se,
is a Kite Owned Invention. Kite shall solely own all right, title and interest in and to any Kite Owned Invention. Kite shall have
the sole right (but not the obligation), at its sole expense, to file, Prosecute, Maintain, and enforce Patents on the Kite Owned
Inventions, including the right to use Study Data and Sample Data in such Prosecution and Maintenance subject to the obligations
in Articles 5, 6 and 7.

 

(ii)       All
Inventions that relate solely to (A) the Humanigen Investigational Product and uses thereof, methods of making, and modifications
thereof, including any improvements thereto, or (B) the Study Data and Sample Data that is solely owned by Humanigen (“collectively,
“Humanigen Owned Inventions””), and all right, title and interest therein, shall be the sole and
exclusive property of Humanigen. For the avoidance of doubt, any Collaboration Invention that generically encompasses the Humanigen
Investigational Product (and not the Kite Investigational Product) within its scope, even where the Humanigen Investigational Product
is not disclosed per se, is a Humanigen Owned Invention. Humanigen shall solely own all right, title and interest in and to any
Humanigen Owned Invention. Humanigen shall have the sole right (but not the obligation), at its sole expense, to file, Prosecute,
Maintain, and enforce Patents on the Humanigen Owned Inventions, including the right to use Study Data and Sample Data in such
Prosecution and Maintenance subject to the obligations in Articles 5, 6 and 7.

 

    	 	 14	 

    	 

    

 

(c)       Joint
Ownership of Collaboration Inventions. All rights to all Inventions relating to, or covering the Combination that are not Kite
Owned Inventions or Humanigen Owned Inventions (“Collaboration Inventions”), and all right, title and
interest thereto, shall be jointly owned by Kite and Humanigen. Each Party shall promptly disclose to the other Party any Invention
they reasonably believe to be a Collaboration Invention. For those countries where a specific license is required for a joint owner
of a Collaboration Invention to practice such Collaboration Invention in such countries, (i) Humanigen hereby grants to Kite a
perpetual, irrevocable, non-exclusive, worldwide, royalty-free, fully paid-up license, transferable and sublicensable, under Humanigen’s
right, title and interest in and to all Collaboration Inventions to use such Inventions for any use, and (ii) Kite hereby grants
to Humanigen a perpetual, irrevocable, non-exclusive, worldwide, royalty-free, fully paid-up license, transferable and sublicensable,
under Kite’s right, title and interest in and to all Collaboration Inventions to use such Inventions for any use, in each
case subject to the obligations in Articles 5, 6 and 7. For clarity, the terms of this Agreement do not provide either Party with
any rights, title or interest or any license to the other Party’s intellectual property except as necessary to conduct the
Study, and as expressly provided under this Agreement, including as set forth in Section 6.3(e), below.

 

(d)       Assignments
and Cooperation. Each Party hereby assigns to the other Party any joint or sole ownership interest in the Inventions as necessary
to effectuate ownership of the Inventions as set forth in Sections 6.1(b) and 6.1(c). Each Party shall require its employees and
Third Parties acting on a Party’s behalf to assign to such Party any Inventions conceived, reduced to practice or otherwise
created by such employees or Third Parties, and to cooperate with such Party in connection with obtaining patent protection therefor.
The Parties agree to cooperate with each other to effectuate ownership of the Inventions as set forth in Sections 6.1(b) and 6.1(c),
including by executing and recording documents.

 

6.2       Mutual
Freedom to Operate for Collaboration Inventions.

 

(a)       License
to Kite. Humanigen hereby grants to Kite a non-exclusive, worldwide, fully paid, perpetual, sublicensable (as described in
Section 6.2(c)) license, under Humanigen’s right, title and interest in and to the Humanigen Owned Inventions, solely for
the purpose of performing of the Study with the Kite Investigational Product for use in the Combination.

 

(b)       License
to Humanigen. Kite hereby grants to Humanigen a non-exclusive, worldwide, fully paid, perpetual, sublicensable (as described
in Section 6.2(c)) license, under Kite’s right, title and interest in and to the Kite Owned Inventions, solely for the purpose
of performing the Study with the Humanigen Investigational Product for use in the Combination.

 

(c)       Sublicenses;
Exercise of Licensed Rights by Third Parties. Each Party may sublicense the rights granted to such Party under this Section
6.2, and any rights under such sublicense may be further sublicensed to multiple tiers of sublicensees. Further, the rights under
such licenses may be exercised by an Affiliate or Third Party on behalf of such Party (or a sublicensee) without the grant of a
sublicense of such rights.

 

(d)       No
Implied Licenses; Background IP. Except as otherwise expressly provided in this Agreement, this Agreement does not grant any
right or license to either Party under any of the other Party’s intellectual property rights (including pre-existing intellectual
property rights owned or controlled by either Party prior to the Effective Date or intellectual property rights developed by such
Party independently from the activities contemplated under this Agreement (“Background IP”)), and no
other right or license is to be implied or inferred from any provision of this Agreement or by the conduct of the Parties, provided,
however, that (i) Humanigen hereby covenants and agrees not to assert that the use of any Collaboration Invention, or the Study
Data, or the Sample Data by Kite or its Affiliates has infringed any Background IP of Humanigen and (ii) Kite hereby covenants
and agrees not to assert that the use of any Collaboration Invention, or the Study Data, or the Sample Data by Humanigen or its
Affiliates has infringed any Background IP of Kite. For clarity, the terms of this Agreement do not provide Kite or Humanigen any
rights to use or commercialize the other Party’s Investigational Products, alone or in combination with that Party’s
Investigational Products.

 

    	 	 15	 

    	 

    

 

(e)       Termination.
Any and all licenses granted under this Section 6.2 shall terminate upon the latest of (i) termination of this Agreement, and (ii)
Study Completion.

 

6.3       Patent
Prosecution and Maintenance of Collaboration Inventions.

 

(a)       Prosecution
and Maintenance of Joint Patents. Kite will control the Prosecution and Maintenance of any Patent covering the Collaboration
Invention (“Joint Patent”), including deciding on (i) the content of the application; (ii) the
countries in which Prosecution and Maintenance should be conducted, subject to Section 6.3(d); and (iii) the timing for filing
of any provisional or regular Patent application. Kite will consult Humanigen in a timely manner and consider Humanigen’s
comments in good faith. In the event of conflicting comments to Prosecution and Maintenance, Kite will make the final decision.
Kite will provide copies of all Joint Patent applications filed and all related Prosecution and Maintenance documents to Humanigen.

 

(b)       Cooperation.
Humanigen shall cooperate with and assist Kite in the Prosecution and Maintenance of any Joint Patent, including (i) consulting
with Kite after receiving any substantial action or development in the Prosecution and Maintenance of such Patent and (i) making
its relevant scientists and scientific records reasonably available.

 

(c)       Costs.
Except as provided in Sections 6.3(a) and 6.3(d), the Parties shall equally share the out-of-pocket costs for all Joint Patents,
with each Party contributing up to US$250,000 per annum unless jointly agreed in writing by the Parties.

 

(d)       Assignment
to One Party. In the event that one Party (for purposes of this Section, the “Filing Party”) wishes
to file a Patent application for a given Collaboration Invention and the other Party (for purposes of this Section, the “Non-Filing
Party”) does not wish to file such Patent application in any countries or in particular countries, the Non-Filing
Party shall execute such documents and perform such acts, at the Filing Party’s expense, as may be reasonably necessary to
effect an assignment of such Collaboration Invention (including applicable Patent applications) to the Filing Party in all applicable
countries, in a timely manner, to allow the Filing Party to Prosecute and Maintain such Patent applications, at the Filing Party’s
expense. Likewise, if a Party (for purposes of this Section, the “Opting-Out Party”) wishes to discontinue
the Prosecution and Maintenance of a Patent application for a given Collaboration Invention in any countries or in particular countries,
the other Party, at its sole option (for purposes of this Section, the “Continuing Party”), may continue
such Prosecution and Maintenance. In such event, the Opting-Out Party shall execute such documents and perform such acts, at the
Continuing Party’s expense, as may be reasonably necessary to effect an assignment of such Collaboration Invention (including
applicable Patent applications) to the Continuing Party in all applicable countries, in a timely manner, to allow the Continuing
Party to Prosecute and Maintain such Patent applications, at the Continuing Party’s expense. The Non-Filing Party and the
Opting-Out Party (as applicable) shall be entitled to receive copies of all Patent applications filed and all related Prosecution
and Maintenance documents. Any Collaboration Invention (including applicable Patent applications) so assigned shall thereafter
be owned solely by the Filing Party or Continuing Party (as applicable), provided however, that the Non-Filing Party or Opting-out
Party as applicable (including its successors and assigns) shall retain a perpetual, irrevocable, non-exclusive, worldwide, royalty-free,
sublicensable, transferable, and fully paid-up license for all purposes under any Patent claims arising from such Collaboration
Invention or Joint Patent in any applicable countries with respect to a product discovered, developed, or commercialized by the
Non-Filing Party or Opting-out Party.

 

    	 	 16	 

    	 

    

 

(e)       Limitations
on Patent Prosecution. Notwithstanding anything to the contrary in Section 5.1(b) and Section 5.3(b), and except as expressly
provided in Section 6.1(d) and Section 6.3(a), without the prior written consent of the other Party:

 

(i)       neither
Humanigen nor Kite shall file or Prosecute any Patent application covering the subject matter of a Collaboration Invention or otherwise
disclosing the other Party’s Confidential Information or, the Protocol, any jointly owned or solely owned Study Data or Sample
Data, either relating to the Combination of the Kite Investigational Product and the Humanigen Investigational Product or any relating
to the other Party’s Investigational Product, to the extent such information has not been previously published;

 

(ii)       Humanigen
shall not file or Prosecute any Patent application covering the subject matter of a Kite Owned Invention;

 

(iii)       Kite
shall not file or Prosecute any Patent application covering the subject matter of a Humanigen Owned Invention; and

 

(iv)       neither
Humanigen nor Kite shall (A) provide assistance to any Third Party for any patent application covering subject matter that such
Party is restricted from filing or prosecuting under clauses 6.3(e)(i) – 6.3(e)(iii) or (B) grant the right to any Third
Party to disclose the Study Data or the Sample Data in the filing or prosecution of any patent application, regardless of which
Party(ies) own such data, except in the case of clause (B), if such Third Party is an Affiliate of such Party.

 

(f)       Joint
Research Agreement. This Agreement shall be deemed a joint research agreement under 35 U.S.C. §102(c) and any foreign
counterparts entered into for the purpose of developing the combination of Kite Investigational Product and Humanigen Investigational
Product.

 

6.4       Third
Party Infringement and Patent Enforcement or Defense.

 

(a)       Notice.
Each Party shall promptly provide the other Party with written notice reasonably detailing any known or alleged infringement by
a Third Party of any Joint Patent, including Third Party submissions and post-grant reviews, unenforceability, or non-infringement
of any such Joint Patent (collectively “Third-Party Infringement”). Within fifteen (15) days after receipt
of such notice, the Parties shall consult with each other to determine the response to any Third Party Infringement.

 

(b)       Enforcement
or Defense. Kite will have the sole right, at its sole discretion and expense, for enforcing and defending any Patents on Kite
Owned Inventions and any Joint Patents assigned to Kite under Section 6.3(d). Humanigen will have the sole right, at its sole discretion
and expense, for enforcing and defending any Patents on Humanigen Owned Inventions and any Joint Patents assigned to Humanigen
under Section 6.3(d). The Parties shall jointly decide on a strategy for the enforcement and defense of any Joint Patent that is
jointly owned and on each Party’s rights and obligations in connection therewith.

 

Article
7

CONFIDENTIALITY

 

7.1       Ownership
of Confidential Information.

 

(a)       Except
as otherwise expressly provided in the Agreement, Study Data, Sample Data, Inventions and other intellectual property, shall be
the Confidential Information of the Party(ies) that own such Study Data, Sample Data, Inventions and other intellectual property.

 

    	 	 17	 

    	 

    

 

(b)       Data
and other information (including Study Data, Sample Data and Inventions) specifically and solely related to the Kite Investigational
Product or to the Humanigen Investigational Product shall be the Confidential Information solely of Kite or solely of Humanigen,
respectively. Such information includes protocol synopses, investigators’ brochures (and portions thereof), biomarker data,
pharmacokinetic and pharmacodynamic data and product storage, handling, expiry, administration and in use handling information.

 

(c)       Data
and other information (including Study Data, Sample Data and Collaboration Inventions) generated in conduct of the Study and not
solely related to only one of the Investigational Products, shall be Confidential Information of both Kite and Humanigen (“Joint
Confidential Information”).

 

7.2       Disclosure
and Use of Confidential Information.

 

(a)       Kite
Confidential Information and Humanigen Confidential Information. Except to the extent expressly authorized by this Agreement
or otherwise agreed to in writing, each Party (the “Receiving Party”) in possession of the Confidential
Information of the other Party (the “Disclosing Party”) shall: (i) hold in confidence and not disclose
the Disclosing Party’s Confidential Information to any Third Party (including without limitation, any future or potential
Third Party collaborators), (ii) take all reasonable precautions to protect the Confidential Information of the other Party (including
all precautions a Party employs with respect to its own confidential information of a similar nature and taking reasonable precautions
to assure that no unauthorized use or disclosure is made by others to whom access to the Confidential Information of the Party
is granted) and (iii) only use the Disclosing Party’s Confidential Information in connection with activities contemplated
by, the exercise of rights permitted by or in order to further the purposes of this Agreement.

 

(b)       Exceptions.
The foregoing obligations under Section 7.2(a) of the Receiving Party shall not apply to the Disclosing Party’s Confidential
Information, to the extent that the Receiving Party establishes by written evidence that such Confidential Information:

 

(i)       was
already known to the Receiving Party, other than under an obligation of confidentiality, at the time of its disclosure by the Disclosing
Party;

 

(ii)       was
generally available to the public or otherwise part of the public domain at the time of its disclosure by the Disclosing Party;

 

(iii)       became
generally available to the public or otherwise part of the public domain, other than through any act or omission of the Receiving
Party in breach of this Agreement, after its disclosure by the Disclosing Party;

 

(iv)       was
disclosed to the Receiving Party, other than under an obligation of confidentiality, by a Third Party who had no obligation to
the Disclosing Party not to disclose such information to others;

 

(v)       was
subsequently developed by or on behalf of the Receiving Party without use of the Disclosing Party’s Confidential Information
or Joint Confidential Information, as the case may be; or

 

(vi)       is
no longer subject to the provisions of Section 7.2 by the prior written consent of the Disclosing Party.

 

(c)       Joint
Confidential Information. Except to the extent expressly authorized by this Agreement or otherwise agreed to in writing, or
to the extent Study results have been published in accordance with Section 8.2 , each Party shall, with regard to Joint Confidential
Information, (i) hold in confidence and not disclose Joint Confidential Information to any Third Party (including without limitation,
any future or potential Third Party collaborators), (ii) take all reasonable precautions to protect Joint Confidential Information
(including all precautions a Party employs with respect to its own confidential information of a similar nature and taking reasonable
precautions to assure that no unauthorized use or disclosure is made by others to whom access to the Confidential Information of
the Party is granted) and (iii) only use Joint Confidential Information in connection with activities contemplated by, the exercise
of rights permitted by or in order to further the purposes of this Agreement.

 

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7.3       Authorized
Disclosures.

 

(a)       Legal
Compliance. A Party may disclose the other Party’s Confidential Information or Joint Confidential Information, as the
case may be, if such disclosure is required by law, rule or regulation (including to comply with the order of a court or governmental
regulations, disclosure by sponsor on any clinical trial registries, if applicable, and any disclosure requirements of the Securities
and Exchange Commission or the securities exchange or other stock market on which such Party’s securities are traded), but
only to the extent such disclosure is reasonably necessary for such compliance; and further provided, that such Party shall
where practicable provide prompt notice of such disclosure requirement to the other Party and provide reasonable assistance to
enable such other Party to seek a protective order or otherwise prevent such disclosure (in each case, to the extent it is legally
permitted to do so).

 

(b)       Regulatory
Authorities. A Party may disclose Joint Confidential Information to Regulatory Authorities to the extent such disclosure is
required to comply with applicable governmental regulations or is in connection with such Party’s filings, submissions and
communications with Regulatory Authorities regarding such Party’s Investigational Product; provided, however, such
Party shall provide written notice to the other Party of such Party’s anticipated use of the Joint Confidential Information
in a timely manner prior to such anticipated use.

 

(c)       Subcontractors.
A Party may disclose the other Party’s Confidential Information or Joint Confidential Information, as the case may be, to
subcontractors to the extent such disclosure is required to conduct the Study or perform the Sample Analysis; provided that any
such subcontractors are contractually bound in writing by obligations reasonably similar to those set forth in Section 7.2.

 

(d)       Affiliates;
Professional Advisors; Other Third Parties. Except for Exhibit A (Kite protocol synopsis) and Exhibit C (Sample Analysis Plan),
which is Kite Confidential Information, for the purposes of this Section 7.3(d) , the terms of this Agreement shall be deemed to
be Joint Confidential Information. A Party may disclose the terms of this Agreement (or a summary thereof) or the other Party’s
Confidential Information or Joint Confidential Information, as the case may be, on a confidential basis and to the extent reasonably
necessary, to its Affiliates, board members, accountants, attorneys, auditors or other professional advisors; provided that any
such board members, accountants, attorneys, auditors or other professional advisors are legally bound by obligations reasonably
similar to those set forth in Section 7.2. A Party may disclose the terms of this Agreement (or a summary thereof) or any Joint
Confidential Information, to the extent reasonably necessary, to any bona fide (as evidenced by a written offer or term sheet)
potential or actual investors, acquirers or merger partners for the sole purpose of evaluating an actual or potential investment,
acquisition or merger; provided, however any such permitted disclosees must be contractually bound in writing by obligations
reasonably similar to those set forth in Section 7.2.

 

7.4       Termination
of Prior Agreements. As of the Effective Date, this Agreement supersedes the Non-Disclosure Agreement between Kite and Humanigen,
Inc. effective as of June 4, 2018. All “Information” (as defined in such non-disclosure agreement) exchanged
between the Parties thereunder shall be deemed Confidential Information of the Disclosing Party hereunder and shall be subject
to the provisions of Article 7.

 

Article
8

PUBLIC DISCLOSURES; USE OF NAMES

 

8.1       Clinical
Trials Registries. Kite agrees that it is the “responsible party” as that term is used in Title VIII Section 801
of the Food Drug Administration Amendments Act 2007 (known as FDAAA 801) and, as such, agrees to timely post the required Study
information on ClinicalTrials.gov, and on other clinical trials registries as required by Applicable Law.

 

    	 	 19	 

    	 

    

 

8.2       Publications
and Presentations.

 

(a)       Kite
is committed to timely publication of the final results following Study Completion, after taking appropriate action to secure intellectual
property rights (if any) arising from the Study. Kite shall have the right to first publish or present any interim results and
the final results of the Study (in accordance with this Section 8.2); provided that Kite gives Humanigen an opportunity to review
and provide comments in accordance with subsection (b), with such comments to be included at Kite’s sole discretion. Humanigen
agrees not to publish any results of the Study or Sample Data (including any interim Study results or Sample Data) prior to the
timely publication of such Study results by Kite.

 

(b)       Each
Party shall use reasonable efforts to publish or present scientific papers dealing with the Study in accordance with accepted scientific
practice. The Parties agree that prior to submission of the Study results for publication or presentation or any other dissemination
of results, including oral presentations, the publishing Party shall invite the other to comment on the content of the material
to be published or presented according to the following procedure:

 

(i)       At
least forty-five (45) days prior to submission for publication of any paper, letter or any other publication, or thirty (30) days
prior to submission for presentation of any abstract, poster, talk or any other presentation, the publishing Party shall provide
to the other Party the full details of the proposed publication or presentation in an electronic version. Upon written request
from the other Party, the publishing Party agrees not to submit data for publication/presentation for an additional ninety (90)
days in order to allow for actions to be taken to preserve rights for patent protection.

 

(ii)       The
publishing Party shall give reasonable consideration to any request by the other Party made within the periods set forth in subsection
(i) above to modify the publication and the Parties shall work in good faith and in a timely manner to resolve any issue regarding
the content for publication.

 

(iii)       The
publishing Party shall remove all Confidential Information of the other Party as requested by such other Party before finalizing
the publication.

 

(iv)       Acknowledgements.
Each Party agrees to identify and acknowledge the other Party’s support in any press release and any other publication or
presentation of the results of the Study.

 

8.3       Press
Releases and Other Public Disclosures.

 

(a)       Generally.
For purposes of Section 8.3, a “Disclosure” means a press release or other public disclosure (including
without limitation, investor calls) concerning this Agreement or the subject matter hereof, including the terms and conditions
of this Agreement and the Protocol. The provisions of Section 8.3 are in addition to the provisions of Article 7.

 

(b)       Review
and Approval. Each Party agrees that the other Party shall have no less than five (5) Business Days (before the date of a proposed
Disclosure) to review and provide comments regarding any proposed Disclosure (subject to Section 8.3(d)), unless a shorter review
time is agreed to by both Parties; provided that if such proposed Disclosure contains patentable subject matter owned solely or
jointly by the reviewing party, the disclosing party will delay such proposed Disclosure, for ninety (90) days, to permit the reviewing
party to prepare and file a patent application. Except for Disclosures covered by other provisions of Section 8.3, if a Party desires
to make a Disclosure, it shall obtain the other Party’s prior written approval for the proposed Disclosure. Disclosures include
public communications that contain previously disclosed information; provided, however, neither Party shall be required
to obtain the other Party’s approval to repeat any information regarding the terms of this Agreement that has already been
publicly disclosed by such Party, or by the other Party, in accordance with Section 8.3, provided such information remains accurate
at such time.

 

    	 	 20	 

    	 

    

 

(c)       Joint
Press Release by Kite. Promptly after the Effective Date, the Parties shall issue the joint press release in the form set forth
in Exhibit D.

 

(d)       Disclosure
Required by Law. In the event that one Party reasonably concludes, based on the opinion of legal counsel, that a Disclosure
is required by law, rule or regulation (including the disclosure requirements of the Securities and Exchange Commission or the
securities exchange or other stock market on which such Party’s securities are traded (for purposes of Section 8.3, collectively,
an “Exchange”)), such Party shall provide the other Party with such advance notice of this Disclosure
as it reasonably can, but shall not be required to obtain approval therefor. Each Party agrees that it shall obtain its own legal
advice with regard to its compliance with securities laws, rules and regulations, and will not rely on any statements made by the
other Party relating to such securities laws, rules and regulations.

 

(e)       Filing
of Agreement. The Parties acknowledge that either or both Parties may be obligated under the disclosure requirements of an
Exchange to file a copy of this Agreement with such Exchange. Each Party shall be entitled to make such a required filing, provided
that it uses reasonable efforts to request confidential treatment of the commercial terms and sensitive technical terms of this
Agreement, to the extent such confidential treatment is reasonably available to such Party. The filing Party shall provide to the
other Party a copy of this Agreement marked to show the provisions for which the filing Party intends to seek confidential treatment
no less than five (5) Business Days before the date of the proposed filing, for such other Party’s review and comment, and
shall thereafter provide reasonable advance notice and opportunity for comment on any subsequent changes to the proposed redactions.

 

8.4       Use
of Names. Each Party agrees to identify the other Party and acknowledge its support in any press release and any publication
or presentation of the Study Data or Sample Data (which shall be in accordance with other provisions of this Agreement, including
Section 8.2). Except as otherwise expressly provided in this Agreement, no right, express or implied, is granted by the Agreement
to use in any manner the name of “Kite,” “Gilead,” “Humanigen”
or any other trade name or trademark of the other Party (or its Affiliates) in any public statement or for commercial, marketing
or other promotional purpose, without the other Party’s prior written consent.

 

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Article
9

HUMAN SUBJECTS

 

9.1       Informed
Consent. Kite shall prepare the patient informed consent form for the Study (which shall include any required consent for the
Sample Analysis) in consultation with Humanigen (it being understood and agreed that the portion of the informed consent form relating
to the Humanigen Investigational Product will be provided to Kite by Humanigen and shall include risks and discomforts associated
with the Humanigen Investigational Product substantially similar to those identified in the safety information made available to
Kite by Humanigen). Any changes to such form that relate to the Humanigen Investigational Product shall be subject to Humanigen’s
review and prior written consent. Kite shall obtain the informed written consent of all Subjects participating in the Study, in
accordance with Applicable Law. The informed consent form: (a) shall not represent that Humanigen is a Sponsor; (b) shall not represent
that Humanigen agrees to compensate Subjects for Study-related injuries; and (c) shall not represent that Humanigen shall provide
the Humanigen Investigational Product to Subjects after Study Completion or early termination of the Study. Kite shall provide
copies of the forms of informed written consents upon Humanigen’s request. To the extent consents are validly obtained, and
in a form approved by Kite, Kite further represents and warrants that the Samples may be used as contemplated in this Agreement
without any obligation to the Subjects or Project Participants, including any obligations of compensation to such Subjects or Project
Participants or any other Third Party for the intellectual property associated with such Samples or Sample Data.

 

9.2       IRB
Approval. Kite shall obtain IRB review and approval of the Protocol and the informed consent form to be used in the Study in
accordance with Applicable Law.

 

9.3       Patient
Privacy and Data Protection. Each Party shall comply with Applicable Law relating to patient privacy and data protection. Each
Party agrees that it shall not disclose in any publication, information that would reveal the identity of a Subject (such as name,
social security number, telephone number or address), without the written consent of such Subject.

 

9.4       Financial
Disclosures. Within a reasonable time after the Effective Date, the Parties shall enter into an agreement related to the collection
of financial disclosure information from “clinical investigators” involved in the Study and the certification and/or
disclosure of the same in accordance with all Applicable Law, including, but not limited to, Part 54 of Title 21 of the United
States Code of Federal Regulations (Financial Disclosure by Clinical Investigators) and related FDA Guidance Documents. Among other
things, such agreement will provide (a) for Kite to track and collect from all “clinical investigators” involved in
the Study either separate certification and/or disclosure forms for each of Kite and Humanigen or one (1) “combined”
certification and/or disclosure form for both Kite and Humanigen and (b) that Kite will be responsible for preparing and submitting
the Financial Disclosure Module 1.3.4 components to the FDA for any Regulatory Documentation in connection with the Study. For
purposes of this Section 9.4, the term “clinical investigators” shall have the meaning set forth in Part 54.2(d) of
Title 21 of the United States Code of Federal Regulations.

 

9.5       Transparency.
To the extent required by Applicable Law, Kite will be responsible for reporting payments and other transfers of value made
to health care professionals (e.g. investigators, steering committee members, data monitoring committee members, consultants, etc.)
in connection with the Study in accordance with reporting requirements under Applicable Law (including the Physician Payment Sunshine
Act and state gift laws, and the European Federation of Pharmaceutical Industries and Associations Disclosure Code) and Kite policies.
Humanigen shall provide all information required for such reporting regarding the value of the Humanigen Investigational Product
provided for use in the Study. Such information shall be provided to the point of contact within Kite’s Global Clinical Supplies
group who is identified to Humanigen in writing upon the execution of the Agreement and thereafter promptly following any change
to such point of contact. Humanigen shall provide the necessary information regarding the value of the Humanigen Investigational
Product within fifteen (15) business days following the execution of this Agreement. In the event that, at any time during the
term of this Agreement, the value of the Humanigen Investigational Product provided under this Agreement changes, Humanigen shall
notify Kite of such revised value, and the effective date of such revised value, within fifteen (15) business days following such
change in value.

 

    	 	 22	 

    	 

    

 

Article
10

SUBCONTRACTING; RECORDS

 

10.1       Subcontracting.
Each Party shall have the right to delegate any portion of its obligations under this Agreement to a subcontractor, provided that
such Party shall remain solely and fully liable for the performance of such subcontractors. Each Party shall ensure that each of
its subcontractors performs its obligations pursuant to the terms of this Agreement, including the Exhibits. Each Party shall use
reasonable efforts to obtain and maintain copies of documents relating to the obligations performed by such subcontractors that
are held by or under the control of such subcontractors and that are required to be provided to the other Party under this Agreement.

 

10.2       Records.

 

(a)       Each
Party shall maintain complete and accurate records of its activities under this Agreement, including without limitation, records
relating to its Sample Analysis, and the manufacture and supply of the Investigational Product in accordance with Applicable Law,
including GCP, GLP, and GMP. Humanigen shall make its manufacturing and supply records with respect to the Humanigen Investigational
Product available to review, audit and inspect by Kite in accordance with the Quality Agreement and PV Agreements, as applicable,
or upon request by Kite at reasonable times during normal business hours. Kite shall make such records which are related to use
of funds by Kite to conduct the Study, for review, audit and inspection by Humanigen, once a year, with at least fifteen (15) days
advance notice by Humanigen, and such audit and inspection will occur during normal business hours.

 

(b)       Each
Party shall maintain such records for at least the period of time required by Applicable Law, but for no less than ten (10) years
following the completion or termination of the Study.

 

Article
11

COMPLIANCE WITH LAWS

 

11.1       Compliance
with Laws and Policies. Each Party shall perform activities under this Agreement in compliance with Applicable Law and in accordance
with good scientific and business ethics and the ethics and other corporate policies applicable to such Party. Specifically, each
Party covenants that it, its directors, employees, officers, and anyone acting on its behalf, shall not, in connection with the
performance of this Agreement, directly or indirectly, make, promise, authorize, ratify or offer to make, or take any act in furtherance
of any payment or transfer of anything of value for the purpose of influencing, inducing or rewarding any act, omission or decision
to secure an improper advantage; or improperly assisting it in obtaining or retaining business for it or the other Party, or in
any way with the purpose or effect of public or commercial bribery. Other provisions of the Agreement require compliance with specified
areas of Applicable Law and such other provisions do not limit the scope of compliance required of the Parties under this Section.

 

11.2       Debarment.
Kite shall require each Project Participant to represent and warrant that neither the Project Participant nor anyone employed by
such Project Participant has been debarred under 21 USC § 335a, disqualified under 21 CFR § 312.70 or § 812.119,
sanctioned by a Federal Health Care Program (as defined in 42 USC § 1320a-7b(f)), including the federal Medicare or a state
Medicaid program, or debarred, suspended, excluded or otherwise declared ineligible from any other similar regional, national,
federal or state agency or program. If a Project Participant receives notice of debarment, suspension, sanction, exclusion, ineligibility
or disqualification under the foregoing-referenced statutes, Kite shall promptly notify Humanigen, and the Parties shall agree
upon appropriate action to address the matter.

 

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Article
12

TERM; TERMINATION

 

12.1       Term.
Unless sooner terminated as provided in Article 12, this Agreement shall expire on the one year anniversary of the date that Kite
provides the Final Study Report to Humanigen or termination of the Study (in either case, “Term”).

 

12.2       Termination
for Material Breach. Either Party may terminate this Agreement, by notice to the other Party, for any material breach of this
Agreement by the other Party, if such breach is not cured within thirty (30) days after the allegedly breaching Party receives
notice of such breach from the non-breaching Party; provided, however, if such breach is not capable of being cured within
such thirty (30) day period, the cure period shall be extended for such amount of time that the Parties agree to in writing is
reasonably necessary to cure such breach, so long as the allegedly breaching Party is using diligent efforts to do so.

 

12.3       Termination
for Other Reasons. Kite may immediately suspend or terminate the Study by notice to Humanigen. Either Party may terminate this
Agreement immediately, by notice to the other Party, if: (a) based on a review of Study Data or other Study-related information,
such Party determines that the Study may unreasonably affect patient safety; (b) any Regulatory Authority or IRB withdraws the
authorization and/or approval to conduct the Study; (c) any Regulatory Authority takes any action, or raises any objection, that
prevents such Party from supplying its Investigational Product for purposes of the Study; or (d) the other Party breaches the representation
and warranty under Section 13.1(c). Either Party may terminate this Agreement with thirty (30) days’ notice to the other
Party, if such Party determines, in its sole discretion, to discontinue all development of its Investigational Product, for medical,
scientific, business or legal reasons; provided, however that if Humanigen is the terminating Party pursuant to this provision,
it shall fulfill its supply obligations under Section 4.1 after such termination.

 

12.4       Effects
of Termination or Expiration.

 

(a)       Study
Wind-Down. Following termination of this Agreement under Section 12.2 or Section 12.3, the Parties shall cooperate to ensure
the orderly wind-down of Study activities, taking into consideration the safety and welfare of Subjects.

 

(b)       Accrued
Rights and Obligations. Except as otherwise expressly provided in this Agreement, termination of this Agreement shall not affect
the rights and obligations of the Parties that accrued prior to the effective date of such termination. Any right that a Party
has to terminate this Agreement, and any rights that such Party has under Article 12, shall be in addition to and not in lieu of
all other rights or remedies that such Party may have at law or in equity or otherwise.

 

(c)       Survival.
Except as otherwise expressly provided in this Agreement, the following shall survive this Agreement’s expiration or termination
for any reason: Article 1 (Definitions), Section 2.6 (Regulatory Matters), Section 2.8(a) (Documentation), Section 2.10 (Additional
Studies), Section 5.1(b) (Ownership of Study Data), Section 5.3(b) (Sample Data), Article 6 (Intellectual Property and Licenses),
Article 7 (Confidentiality), Article 8 (Public Disclosures; Use of Names), Section 9.3 (Patient Privacy and Data Protection), Section
10.2 (Records), Section 12.4 (Effects of Termination), Section 13.2 (Disclaimers), Section 14.1 (Indemnification), Section 14.2
(Limitation on Liability), Article 15 (Dispute Resolution) and Article 16 (Miscellaneous). To the extent applicable to a Section
or Article that survives the expiration or termination of this Agreement, any other Sections and Articles that are (directly or
indirectly) referenced in, or refer to, such surviving Section or Article shall survive.

 

    	 	 24	 

    	 

    

 

Article
13

REPRESENTATIONS AND WARRANTIES

 

13.1       Mutual
Representations and Warranties. Each Party represents and warrants to the other Party the following:

 

(a)       Such
Party has the full right, power and authority, and has obtained all approvals, permits or consents necessary, to enter into this
Agreement, to perform all of its obligations hereunder.

 

(b)       Such
Party has not entered into prior to the Effective Date, and shall not enter into during the Term, any agreement that conflicts
with a Party’s obligations hereunder.

 

(c)       Neither
Party nor anyone employed by it has been debarred under 21 USC § 335a, disqualified under 21 USC § 312.70 or § 812.119,
sanctioned by a Federal Health Care Program (as defined in 42 USC § 1320a-7b(f)), including the federal Medicare or a state
Medicaid program, or debarred, suspended, excluded or otherwise declared ineligible from any other similar regional, national,
federal or state agency or program. If such Party receives notice of debarment, suspension, sanction, exclusion, ineligibility
or disqualification under the foregoing-referenced statutes, such Party shall promptly notify the other Party, and the Parties
shall agree upon appropriate action to address the matter.

 

13.2       Disclaimers.
NEITHER PARTY REPRESENTS OR WARRANTS THAT THE STUDY WILL BE SUCCESSFUL OR LEAD TO ANY PARTICULAR RESULT. EXCEPT AS OTHERWISE EXPRESSLY
PROVIDED IN THIS AGREEMENT, NEITHER PARTY MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND WITH RESPECT TO ITS RESPECTIVE INVESTIGATIONAL
PRODUCT, MATERIALS OR INFORMATION SUPPLIED BY IT TO THE OTHER PARTY HEREUNDER, AND EXPRESSLY DISCLAIMS ALL WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

 

Article
14

INDEMNIFICATION; LIMITATION ON LIABILITY; INSURANCE

 

14.1       Indemnification.

 

(a)       Definitions.
The following definitions are for purposes of Section 14.1:

 

(i)       “Claims”
means claims, suits, actions, demands or other proceedings by any Third Party arising out of this Agreement or the Study, including
product liability claims.

 

(ii)       “Indemnitee”
means, as applicable, a Kite Indemnitee (as defined in Section 14.1(b)) or a Humanigen Indemnitee (as defined in Section 14.1(c)).

 

(iii)       “Losses”
means any and all liabilities, damages, settlements, penalties, fines, reasonable costs and expenses (including, reasonable attorneys’
fees and other expenses of litigation).

 

(b)       Indemnification
by Humanigen. Humanigen hereby agrees to indemnify, defend (if requested by Kite) and hold harmless each of Kite, its Affiliates
and its and their officers, directors, employees, subcontractors and agents (for purposes of Section 14.1, each, a “Kite
Indemnitee”) from and against Losses incurred in connection with Claims, to the extent such Losses (A) arise out
of or in connection with: (1) the negligence or willful misconduct of any Humanigen Indemnitees; (2) Humanigen’s breach of
any of its representations, warranties, covenants or obligations under this Agreement; or (3) Humanigen’s breach of any Applicable
Law pertaining to activities it performs under this Agreement; or (B) are directly caused by the Humanigen Investigational Product,
except to the extent to Losses arise out of or in connection with (1) the negligence or willful misconduct of any Kite Indemnitees;
(2) Kite’s breach of any of its representations, warranties, covenants or obligations under this Agreement; or (3) Kite’s
breach of any Applicable Law pertaining to activities it performs under this Agreement.

 

    	 	 25	 

    	 

    

 

(c)       Indemnification
by Kite. Kite hereby agrees to indemnify, defend (if requested by Humanigen) and hold harmless each of Humanigen, its Affiliates
and its and their officers, directors, employees, subcontractors and agents (for purposes of Section 14.1, each, a “Humanigen
Indemnitee”) from and against Losses incurred in connection with Claims, to the extent such Losses (A) arise out
of or in connection with: (1) the negligence or willful misconduct of any Kite Indemnitees; (2) Kite’s breach of any of its
representations, warranties, covenants or obligations under this Agreement; or (3) Kite’s breach of any Applicable Law pertaining
to activities it performs under this Agreement; or (B) are directly caused by the Kite Investigational Product, except to the extent
any Losses arise out of or in connection with (1) the negligence or willful misconduct of any Humanigen Indemnitees; (2) Humanigen’s
breach of any of its representations, warranties, covenants or obligations under this Agreement; or (3) Humanigen’s breach
of any Applicable Law pertaining to activities it performs under this Agreement.

 

(d)       Each
Party’s respective obligations under Section 14.1(b) and 14.1(c) are conditioned upon the Party seeking indemnification (the
“Indemnitee”) delivering written notice to the other Party (the “Indemnitor”) of any potential
Losses subject to indemnification hereunder promptly after the Indemnitee becomes aware of such potential Losses. The Indemnitor
will have no indemnification obligations hereunder to the extent materially prejudiced by any delay by the Indemnitee in providing
such notice. The Indemnitor will have the sole right to defend or settle (subject to the remainder of the paragraph) any Claim
(using counsel reasonably satisfactory to the Indemnitee). The Indemnitee will cooperate fully with Indemnitor in connection therewith,
at the Indemnitor’s expense. The Indemnitee may participate in (but not control) the defense thereof at its sole cost and
expense. The Indemnitor shall keep the Indemnitee advised of the status of such action, suit, proceeding or claim and the defense
thereof and shall reasonably consider recommendations made by the Indemnitee with respect thereto. The Indemnitee shall not agree
to any settlement of such action, suit, proceeding or claim without the prior written consent of the Indemnitor, which shall not
be unreasonably withheld, delayed or conditioned. The Indemnitor shall not agree to any settlement of such action, suit, proceeding
or claim or consent to any judgment in respect thereof that does not include a complete and unconditional release of the Indemnitee
from all liability with respect thereto or that imposes any liability or obligation on the Indemnitee without the prior written
consent of the Indemnitee, which shall not be unreasonably withheld, delayed or conditioned.

 

(e)       Study
Subjects. Kite shall not offer compensation on behalf of Humanigen to any Subject or bind Humanigen to any indemnification
obligations in favor of any Subject. The Parties shall share equally all Losses arising out of any Claims, other than those described
in paragraphs 14.1(b) or 14.1(c) above, to the extent such Losses arise out of the Study after both Parties’ respective Investigational
Products have been administered (i.e., such Losses would not have occurred but for the Combination).

 

14.2       Limitation
on Liability. IN NO EVENT SHALL EITHER PARTY BE LIABLE FOR ANY CONSEQUENTIAL, INDIRECT, INCIDENTAL, PUNITIVE OR EXEMPLARY DAMAGES,
HOWEVER CAUSED; PROVIDED HOWEVER, NOTHING IN THIS SECTION 14.2 IS INTENDED TO LIMIT THE RIGHTS OR OBLIGATIONS OF EITHER PARTY UNDER
SECTION 14.1 OR FOR DAMAGES ARISING OUT OF A BREACH OF ARTICLES 6 OR 7.

 

14.3       Insurance.

 

(a)       General.
Each Party shall maintain insurance coverage as set forth in Section 14.3(b); provided, however, that both Parties have
the right, in their sole discretion, to self-insure, in part or in whole, for any such coverage. Insurance coverage shall be primary
insurance with respect to each Party’s own participation under this Agreement and shall be maintained with an insurance company
or companies having an A.M. Best’s rating (or its equivalent) of A-VII or better. On request, each Party shall provide to
the other Party certificates of insurance evidencing the insurance coverage required under Section 14.3. Each Party shall provide
to the other Party written notice of any cancellation, nonrenewal or adverse material change in any of the required insurance coverages
in accordance with policy provisions. The limits of any required insurance coverage shall not limit the Parties’ liability
under the indemnification provisions of this Agreement.

 

    	 	 26	 

    	 

    

 

(b)       Coverage.
Each Party shall maintain in full force and effect through the term of this Agreement, sufficient insurance, including (i) commercial
general liability (including contractual liability) insurance covering bodily injury and property damage arising out of such Party’s
obligations under this Agreement, for limits no less than one million dollars ($1,000,000) per occurrence and two million dollars
($2,000,000) in the aggregate; (ii) clinical trial liability insurance with limits not less than $10,000,000 per occurrence; and
(iii) product liability insurance relating to such Party’s Investigational Product, for limits of no less than one million
dollars ($1,000,000) per occurrence and two million dollars ($2,000,000) in the aggregate. For claims-made type coverage, product
liability insurance and clinical trial liability insurance shall be maintained for a minimum of three (3) years after the last
Subject receives treatment in connection with the Study (which may be achieved, without limitation, by way of an extended reporting
period endorsement), including any treatment received after Study Completion, but not less than the statute of limitations in any
state or location where the Study is being conducted. Each Party shall ensure prior to the enrollment of any Subjects that the
insurance policies required by this Section cover injuries that may arise in connection with the Study.

 

Article
15

DISPUTE RESOLUTION

 

15.1       Internal
Resolution. Kite and Humanigen recognize that a dispute, controversy or claim of any nature whatsoever arising out of or relating
to this Agreement (each, a “Dispute”) may from time to time arise during the Term. In the event of the
occurrence of such a Dispute, the Parties shall first refer such Dispute to the JDC pursuant to Section 3.1(c). If the JDC cannot
resolve such Dispute, the Party bringing the Dispute shall provide written notice, including a description of the Dispute and the
steps taken to resolve such Dispute, to the other Party. Upon receipt of such notice, the Dispute shall be referred to Humanigen’s
Chief Executive Officer and Kite’s Vice President, Clinical Development, for resolution, prior to proceeding under the other
provisions of Article 15.

 

15.2       Dispute
Resolution and Jurisdiction. The Parties shall attempt in good faith to settle all Disputes in an amicable manner. Any Dispute
arising out of or relating to this Agreement, including the breach, termination or validity hereof or thereof, shall be governed
by and construed in accordance with the substantive laws of the State of California, without giving effect to its choice of law
principles that would direct the application of the substantive law of any other jurisdiction. The Parties hereby exclude from
this Agreement the application of the United Nations Convention on Contracts for the International Sale of Goods. Nothing contained
in this Agreement shall deny either Party the right to seek injunctive or other equitable relief from a court of competent jurisdiction
in the context of a bona fide emergency or prospective irreparable harm, and such an action may be filed or maintained notwithstanding
any ongoing discussions between the Parties.

 

Article
16

MISCELLANEOUS

 

16.1       Notices.
Except as otherwise expressly provided in this Agreement, any notice required under this Agreement shall be in writing, shall specifically
refer to this Agreement and shall be sent in accordance with the provisions of this Section 16.1. Notices shall be sent via one
of the following means and will be effective (a) on the date of delivery, if delivered in person; (b) on the date of receipt, if
sent by a facsimile or email (with delivery confirmed); or (c) on the date of receipt, if sent by private express courier or by
first class certified mail, return receipt requested (or its equivalent). Any notice sent via facsimile or email shall be followed
by a copy of such notice by private express courier or by first class mail. Notices shall be sent to the other Party at the addresses
set forth below. Either Party may change its addresses for purposes of this Section 16.1 by sending written notice to the other
Party.

 

    	 	 27	 

    	 

    

 

	 	If to Kite:	 	Kite Pharma,
Inc.

2225 Colorado
Avenue

Santa Monica,
CA 90404

Attn: Corporate
Counsel

Telephone:
310-824-9999

Email: legal@kitepharma.com

	 	 	 	 
	 	If to Humanigen:	 	Humanigen,
Inc.
533 Airport
Blvd, Suite 400

Burlingame,
CA 94010

Attn: Cameron
Durrant

Email: cdurrant@humanigen.com

  

16.2       Assignment.

 

(a)       General.
Except as otherwise expressly provided in this Agreement, neither Party may assign any of its rights or delegate any of its obligations
under this Agreement without the prior written consent of the other Party, such consent not to be unreasonably withheld. Subject
to the other provisions of Section 16.2, either Party may assign this Agreement, in part or in its entirety, to (a) an Affiliate;
(b) an acquirer of all its capital stock (by reverse triangular merger or otherwise) or all or substantially all its assets; or
(c) an acquirer (whether by license or acquisition) of all of the assigning Party’s rights with respect to its Investigational
Product, including rights to research, develop, manufacture and commercialize the Investigational Product (for purposes of Section
16.2, any of the foregoing, a “Change of Control”), provided that in the event of any Change of Control,
the Third Party to which this Agreement is assigned expressly agrees in writing to assume and be bound by the obligations of the
assigning Party under this Agreement. A copy of such writing shall be provided to the non-assigning Party within thirty (30) days
of the assignment. Subject to the foregoing and other applicable provisions of Section 16.2 this Agreement will inure to the benefit
of and bind the Parties’ successors and assigns. Any assignment or delegation in contravention of any such applicable provisions
shall be null and void. Notwithstanding any other provision of Section 16.2, this Agreement may only be assigned together with
the Ancillary Agreements.

 

(b)       Acquisitions.
If Humanigen or its Affiliates acquires, or is acquired by, a Third Party that has an active program researching, developing or
commercializing a chimeric antigen receptor designed to target the antigen CD19 (any or all of which such programs are a “Kite
Competitive Program”), Humanigen shall (i) adopt reasonable procedures to prevent any disclosure and/or use of Confidential
Information of Kite or Joint Confidential Information, as the case may be, in any Kite Competitive Program, and (ii) provide notice
to Kite describing such procedures as soon as practicable.

 

16.3       Force
Majeure. Neither Party shall be deemed to have breached this Agreement for failure to perform its obligations under this Agreement
to the extent such failure results from causes beyond the reasonable control of the affected Party, such causes including acts
of God, earthquakes, fires, floods, embargoes, wars, acts of terrorism, insurrections, riots, civil commotions, omissions or delays
in action by any governmental authority, acts of a government or agency thereof and judicial orders or decrees. If a force majeure
event occurs, the Party unable to perform shall promptly notify the other Party of the occurrence of such event, and the Parties
shall meet (in person or telephonically) promptly thereafter to discuss the circumstances relating thereto. The Party unable to
perform shall (a) provide reasonable status updates to the other Party from time to time; (b) use commercially reasonable efforts
to mitigate any adverse consequences arising out of its failure to perform; and (c) resume performance as promptly as possible.

 

    	 	 28	 

    	 

    

 

16.4       Relationship
of the Parties. The Parties to this Agreement are independent contractors, and nothing contained in this Agreement shall be
deemed or construed to create a partnership, joint venture, employment, franchise, agency or fiduciary relationship between the
Parties.

 

16.5       Amendment;
Waiver. Except as otherwise expressly provided in this Agreement, no amendment to this Agreement shall be effective unless
made in writing and executed by an authorized representative of each Party. A Party’s failure to exercise, or delay in exercising,
any right, power, privilege or remedy under this Agreement shall not (a) operate as a waiver thereof or (b) operate as a waiver
of any other right, power, privilege or remedy. A waiver will be effective only upon the written consent of the Party granting
such waiver.

 

16.6       Construction;
Captions. Each Party acknowledges that it participated in the negotiation and preparation of this Agreement and that it had
the opportunity to consult with an attorney of its choice in connection therewith. Ambiguities, if any, in this Agreement shall
not be construed against either Party, irrespective of which Party may be deemed to have drafted the Agreement or authorized the
ambiguous provision. Capitalized terms defined in the singular shall include the plural and vice versa. The terms “includes”
and “including” mean “includes, without limitation,” and “including,
without limitation,” respectively. Titles, headings and other captions are for convenience only and shall not affect
the meaning or interpretation of this Agreement.

 

16.7       Severability.
If any of the provisions of this Agreement are held to be illegal, invalid or unenforceable, such illegal, invalid or unenforceable
provisions shall be replaced by legal, valid and enforceable provisions that will achieve to the maximum extent possible the intent
of the Parties, and the other provisions of this Agreement shall remain in full force and effect.

 

16.8       Entire
Agreement. This Agreement, together with the Ancillary Agreements and the Exhibits hereto, contains the entire understanding
between the Parties with respect to the subject matter hereof and thereof and supersedes and terminates all prior agreements, understandings
and arrangements between the Parties with respect to such subject matter, whether written or oral.

 

16.9       Counterparts;
Facsimiles. This Agreement may be executed in two (2) or more counterparts, each of which will be deemed an original, but all
of which together will constitute one and the same instrument. A facsimile (including a PDF image delivered via email) of this
Agreement, including the signature pages hereto, will be deemed to be an original. Notwithstanding the foregoing, the Parties shall
deliver original execution copies of this Agreement to one another as soon as practicable following execution thereof.

 

[Signature
page follows]

 

    	 	 29	 

    	 

    

 

In
Witness Whereof, the Parties have caused this Agreement to be executed by their respective duly authorized representatives
as set forth below.

 

 

 

	
        Kite Pharma,
Inc. 

        

         

         
	 	
        Humanigen,
Inc.

        

         

         

	/s/ J.G. McHutchison	 	/s/ Cameron Durrant
	Signature	 	Signature
	 	 	 
	Name: J.G. McHutchison

Title: CSO

Date: May 30, 2019	 	Name: Cameron Durrant

Title: CEO

Date: May 30, 2019

  

    	 	 30	 

    	 

    

  

Exhibit A

 

Kite Protocol Synopsis 

 

    	 	 31	 

    	 

    

 

Exhibit B

 

Study Budget 

 

    	 	 32	 

    	 

    

  

Exhibit C

 

Sample Analysis Plan

 

    	 	 33	 

    	 

    

 

Exhibit D

 

Press Release

 

This press release was filed
as Exhibit 99.1 to the Current Report on Form 8-K of Humanigen, Inc. with the Securities and Exchange Commission on May 31, 2019.Exhibit 10.3

 

SECURED BRIDGE NOTE

 

 

	$[NUMBER]	June 28, 2019

 

For value received,
the undersigned, Humanigen, Inc., a Delaware corporation (“Borrower”), promises to pay to the order of
[HOLDER NAME], and its successors and assigns (together with its successors and assigns, “Lender”), in lawful
money of the United States of America, the principal sum of $[NUMBER] with interest thereon to be computed from the date of disbursement
under this promissory note (the “Note”) at the rate of 7% (the “Interest Rate”).

 

Borrower shall pay
all outstanding principal and accrued interest at the Interest Rate and all other amounts owed pursuant to this Note and the other
Credit Documents on October 1, 2019 (the “Maturity Date”), unless earlier accelerated pursuant to the terms
of this Note or any other Credit Document.

 

Borrower shall make
all payments payable in cash under this Note in lawful money of the United States. All payments paid by Borrower to Lender under
this Note and under the other Credit Documents shall be applied in the following order of priority: (i) to amounts, other than
principal and interest, due to Lender pursuant to this Note or the other Credit Documents; (ii) to accrued but unpaid interest
on this Note; and (iii) to the unpaid principal balance of this Note. Borrower irrevocably waives the right to direct the application
of any and all payments at any time hereafter received by Lender from or on behalf of Borrower, and Borrower irrevocably agrees
that Lender shall have the continuing exclusive right to apply any and all such payments against the then due and owing obligations
of Borrower in such order of priority as Lender may deem advisable. If Borrower makes any payment of principal, interest or other
amounts upon the indebtedness by check, draft, or other remittance, Lender shall not be deemed to have received such payment until
Lender actually receives the payment instrument.

 

1.       Interest.
Interest shall accrue at the Interest Rate on the outstanding principal balance at the end of each day on which any amount
is outstanding under this Note. Interest shall be calculated on a daily basis (computed on the actual number of days elapsed over
a year of 360 days), commencing on the date of this Note, and shall be based upon the outstanding principal balance at the end
of each day.

 

2.       Default
Interest. Upon the occurrence of an Event of Default (as hereinafter defined), including the failure of Borrower to make full
payment on the Maturity Date, Lender shall be entitled to receive, and Borrower shall pay, interest on the then outstanding principal
balance due and payable under this Note at the rate of 3.0% per annum above the Interest Rate (“Default Rate”)
but in no event greater than the maximum rate permitted by applicable law. Interest shall accrue and be payable at the Default
Rate from the occurrence of an Event of Default until all Events of Default have been fully cured. Such accrued interest shall
be secured by the Liens (as hereinafter defined) in favor of Lender under the Credit Documents (as hereinafter defined). Borrower
agrees that Lender’s right to collect interest at the Default Rate is given for the purpose of compensating Lender at reasonable
amounts for Lender’s added costs and expenses that occur as a result of Borrower’s default and that are difficult to
predict in amount, such as increased general overhead, concentration of management resources on problem loans, and increased cost
of funds. Lender and Borrower agree that Lender’s collection of interest at the Default Rate is not a fine or penalty, but
is intended to be and shall be deemed to be reasonable compensation to Lender for increased costs and expenses that Lender will
incur if an Event of Default occurs hereunder. Collection of interest at the Default Rate shall not be construed as an agreement
or privilege to extend the Maturity Date or to limit or impair any rights and remedies of Lender under any Credit Document. If
judgment is entered on this Note, interest shall continue to accrue post-judgment at the greater of (a) the Default Rate or
(b) the applicable statutory judgment rate.

 

    	 		 

    	 

    

 

3.             Security;
Definitions; and Construction.

 

(a)       This
Note is and shall be secured by, and Lender is entitled to the benefits of, the Liens granted by Borrower to Agent under the Credit
Documents and all other related filings, instruments, agreements and documents providing Collateral for the Loan and the other
Obligations (as hereinafter defined), whether now or hereafter in existence.

 

(b)       When
used herein, the following terms shall have the following meanings (terms defined in the singular to have the same meaning when
used in the plural and vice versa):

 

“Agent”
means Black Horse Capital Master Fund Ltd., in its capacity as agent for the Lender and the other Holders, and any successors or
assigns thereof in such capacity.

 

“Change in
Control” means (i) any reorganization, merger or consolidation of Borrower, other than a transaction or series of related
transactions in which the holders of the voting securities of Borrower outstanding immediately prior to such transaction or series
of related transactions retain, immediately after such transaction or series of related transactions, at least a majority of the
total voting power represented by the outstanding voting securities of Borrower or such other surviving or resulting entity or
(ii) a sale, lease or other disposition of all or substantially all of the assets of Borrower.

 

“Code”
means the Uniform Commercial Code as in effect in the State of Delaware from time to time.

 

“Collateral”
means all personal and real property with respect to which a Lien has been granted to or for the benefit of Agent pursuant to the
Credit Documents, or which otherwise secures the payment or performance of any Obligation.

 

“Credit Documents”
means, collectively, the Security Agreement, this Note, and any and all guaranties, security agreements, pledge agreements, and
other instruments, agreements and documents delivered to Agent from time to time that evidence, secure or otherwise relate to any
of the transactions described in or contemplated thereby, and any amendments, renewals, restatements, replacements or other modifications
of the foregoing from time to time.

 

“Financing”
means a bona fide transaction or series of related transactions with the principal purpose of raising capital, pursuant to which
Borrower raises aggregate gross proceeds of not less than THREE MILLION DOLLARS ($3,000,000.00).

 

“Holders”
has the meaning ascribed to such term in the Security Agreement.

 

“Lien”
means any mortgage, deed of trust, pledge, security interest, hypothecation, assignment, deposit arrangement, lien (statutory or
other), or preference, priority, or other security agreement or preferential arrangement, charge or encumbrance of any kind or
nature whatsoever (including any conditional sale or other title retention agreement, any financing lease having substantially
the same economic effect as any of the foregoing, and the filing of any financing statement under the Code or comparable law of
any jurisdiction to evidence any of the foregoing).

 

“Loan”
means the loan evidenced by this Note.

 

“Loan Parties”
means, collectively, Borrower and any other party who may from time to time be obligated under this Note.

 

    	 	2 	 

    	 

    

 

“Obligations”
means this Loan and all other term loans and revolving credit loans and all other advances, debts, liabilities, obligations, covenants
and duties owing, arising, due or payable from Borrower to Lender of any kind or nature, existing or future, whether or not evidenced
by any note, letter of credit, reimbursement agreement, guaranty or other instrument or document, whether arising under or issued
pursuant to this Note, the Credit Documents or otherwise and whether direct or indirect (including those acquired by assignment),
absolute or contingent, primary or secondary, due or to become due, existing on or after the date hereof and however acquired or
extended, and whether or not of the same kind or quality or that relate to the same transactions or series of transactions, and
all amendments, renewals, restatements, replacements, consolidations or other modifications of the foregoing from time to time.
The term includes all principal, interest, fees, expenses and any other amounts chargeable to Borrower or any other person or entity
under any of the Credit Documents.

 

“Security
Agreement” means the Security Agreement dated as of the date hereof by and between Agent, as agent for the Holders,
and Borrower, as it may be amended, modified, supplemented, or replaced from time to time.

 

“Usury Law”
means any law or regulation of any governmental authority having jurisdiction, limiting the amount of interest that may be paid
for the loan, use or detention of money.

 

(c)           The
terms “include”, “including” and similar terms shall be construed as if followed by the phrase “without
being limited to.” The term “or” has, except where otherwise indicated, the inclusive meaning represented by
the phrase “or.” Words of masculine, feminine or neuter gender shall mean and include the correlative words of the
other genders, and words importing the singular number shall mean and include the plural number, and vice versa. All article, section,
schedule, and exhibit captions are used for convenient reference only and in no way define, limit or describe the scope or intent
of, or in any way affect, any such article, section, schedule, or exhibit. Unless the context of this Note clearly requires otherwise,
references to the plural include the singular, references to the singular include the plural. Any reference in this Note or in
the Credit Documents to this Note or to any of the Credit Documents shall include all alterations, amendments, changes, extensions,
modifications, renewals, replacements, substitutions, and supplements thereto and thereof, as applicable.

 

(d)          An
Event of Default shall “continue” or be “continuing” until such Event of Default has been waived in writing
by Lender.

 

4.             Usury.
All agreements contained in the Credit Documents are expressly limited so that in no event whatsoever, whether by reason of the
making of advances on account of the Loan, or under any of the Credit Documents, or acceleration of maturity of the unpaid principal
balance of the Loan or otherwise, shall the amount paid or agreed to be paid by or on behalf of Borrower to Lender for the use,
forbearance or detention of money exceed the highest lawful rate permissible under any applicable Usury Law. If, from any circumstances
whatsoever, compliance with any of the Credit Documents, at the time performance thereunder shall be due, shall involve transcending
the limit of validity prescribed by law which a court of competent jurisdiction may deem applicable thereto, then, ipso facto,
the obligations to be fulfilled shall be reduced to the limit of such validity. If from any circumstance, Lender shall ever receive
as interest an amount which would exceed the highest lawful rate, such amount which would be excessive interest shall be applied
to the reduction of the unpaid principal balance due hereunder and not to the payment of interest. This provision shall control
every other provision of all agreements between any Borrower and Lender; provided, however, that there shall be no
automatic reduction of such payments or obligations as to any party barred by law from availing itself in any action or proceeding
of the defense of usury, or any party barred or exempted from the operation of any Usury Law, or in the event and to the extent
the Loan, because of its amount or purpose or for any other reason, is exempt from the operation of the Usury Law.

 

    	 	3 	 

    	 

    

 

5.             Prepayment.

 

(a)       This
Note may be prepaid in whole or in part at any time after the date hereof.

 

(b)       This
Note shall be prepaid in whole concurrently with the completion of a Financing or upon a Change in Control.

 

(c)       Any
prepayment of principal shall be accompanied by a payment of interest accrued to date thereon.

 

6.             Default.

 

6.1          Events
of Default. Any one or more of the following events shall constitute an event of default (each, an “Event of Default”)
under this Note:

 

(a)       Borrower
fails to timely pay any monetary obligation under this Note in accordance with the terms hereof; or

 

(b)       Borrower
fails or neglects to timely perform, keep, or observe any other term, provision, condition, covenant, or agreement contained in
this Note and such failure or neglect continues more than fifteen (15) days after Agent sends written notice to Borrower of such
failure or neglect (provided that Borrower shall not be entitled to a cure period hereunder if Agent determines in good faith that
such failure or neglect is not capable of being cured or is not capable of being cured within such 15-day period); or

 

(c)       any
Loan Party fails to timely pay any monetary obligation or fails or neglects to timely perform, keep, or observe any term, provision,
condition, covenant or agreement under any other Credit Document in accordance with the terms thereof and such failure or neglect
continues beyond any applicable notice and cure period provided in such Credit Document; or

 

(d)       an
“Event of Default” under any other Credit Document shall have occurred; or

 

(e)       Borrower
is unable to pay its debts generally as they become due, makes an assignment for the benefit of creditors, or an order, judgment,
decree or injunction is entered adjudicating Borrower bankrupt or insolvent or requiring the dissolution or split up of Borrower
or preventing Borrower from conducting all or any part of its business; or any order for relief with respect to Borrower is entered
under the Federal Bankruptcy Code; or Borrower petitions or applies to any tribunal for the appointment of a custodian, trustee,
receiver or liquidator of Borrower, or of any substantial part of the assets of Borrower, or commences any proceeding relating
to Borrower under any bankruptcy reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or similar
laws of any jurisdiction now or hereafter in effect; or any such petition or application is filed, or any such proceeding is commenced,
against Borrower and either (i) Borrower by any act indicates its approval thereof, consent thereto or acquiescence therein or
(ii) such petition, application or proceeding is not dismissed within sixty (60) days.

 

6.2          Acceleration
upon Event of Default. Upon the occurrence of any Event of Default (whether or not Lender has knowledge that such Event of
Default exists), then the Loan and all other Obligations of Borrower and the other Loan Parties to Lender under this Note and the
other Credit Documents shall, (a) at the option of Agent, or (b) upon an Event of Default under Section 6.1(e) above, and
notwithstanding any cure period allowed in any other Credit Document, immediately become due and payable without demand and without
notice to Borrower, any other Loan Party, or any other person or entity.

 

    	 	4 	 

    	 

    

 

7.            Agent’s
Rights and Remedies.

 

7.1       Rights
and Remedies. Upon the occurrence, and during the continuation, of an Event of Default: (a) Agent shall have all rights and
remedies available to it at law or equity for collection of the amounts due under this Note; (b) Agent shall have all rights, powers
and remedies set forth in the other Credit Documents relating to the Collateral as security for the Loan and the other Obligations,
as well as any and all rights and remedies available to it under any applicable law or as otherwise provided at law or in equity;
(c) Borrower shall pay to Agent, in addition to the sums stated above, the reasonable costs of collection, regardless of whether
litigation is commenced, including any reasonable attorneys’ (and any other consultants’ or experts’) fees, expenses
and other costs, to the extent not prohibited by law; and (d) notwithstanding any other provision of this Note, during the period
of existence of such Event of Default, interest on the Loan evidenced by this Note shall accrue and be paid at the Default Rate.

 

7.2       Remedies
Cumulative. Agent’s rights and remedies under this Note, the Credit Documents and all other agreements related to the
transactions described in the Credit Documents shall be cumulative. Agent shall have all other rights and remedies not inconsistent
herewith as provided under the Code, by law or in equity. No exercise by Agent of one right or remedy shall be deemed an election,
and no waiver by Agent of any Event of Default shall be deemed a continuing waiver. No delay by Agent shall constitute a waiver,
election, or acquiescence by it.

 

7.3          Borrower’s
Approvals, Ratifications, and Waivers.

 

(a)       Except
as expressly set forth herein, to the fullest extent permitted by applicable law, Borrower, for itself, and its successors and
assigns, expressly waives presentment, demand, protest, notice of dishonor, protest, notice of protest, notice of intent to accelerate,
notice of acceleration, and any and all other notices, demands and consents in connection with the delivery, acceptance, performance,
default or enforcement of this Note, and hereby further waives stay of execution and all suretyship defenses to payment generally.
No release of any security held for the payment of this Note, or extension of any time periods for any payments due hereunder,
or release of Collateral that may be granted by Agent from time to time, and no alteration, amendment or waiver of any provision
of this Note or of any of the other Credit Documents, shall modify, waive, extend, change, discharge, terminate or affect the liability
of Borrower or any other Loan Party under this Note or the other Credit Documents.

 

(b)       No
failure or delay of Agent in exercising any right or remedy hereunder will operate as a waiver thereof, nor will any single or
partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such right or power, or any
course of conduct, preclude any other or further exercise thereof or the exercise of any other right or power, or operate as, or
be construed to constitute, a waiver of any subsequent breach of the same or other provision hereof.

 

(c)       Borrower
covenants and agrees that it is liable with respect to all of the Obligations, including the Loan. Upon the occurrence of any Event
of Default and at any time thereafter, Borrower covenants and agrees that Agent may, in its sole and absolute discretion, proceed
directly against Borrower, any other Loan Party, or any other person or entity liable for the payment or performance of the Obligations,
or any or all of the Collateral, or other security for the Obligations, or any combination of the foregoing, in one or more claims,
actions or proceedings, whether or not any such claims, actions or proceedings are instituted simultaneously or at different times.

 

    	 	5 	 

    	 

    

 

8.       Authority.
Borrower warrants and represents that the persons or officers who are executing this Note and the other Credit Documents on behalf
of Borrower have full right, power and authority to do so, and that this Note and the other Credit Documents constitute valid and
binding documents, enforceable against Borrower in accordance with their terms, and that no other person, entity, or party is required
to sign, approve, or consent to, this Note.

 

9.       Governing
Law. The laws of the State of Delaware shall govern all questions concerning the construction, validity, interpretation and
enforceability of this Note, and the performance of the obligations imposed by this Note, without giving effect to any choice of
law or conflict of law rules or provisions (whether of the State of Delaware or any other jurisdiction) that would cause the application
of the laws of any jurisdiction other than the State of Delaware.

 

10.       Notices.
All notices, demands and other communications required or permitted to be given hereunder shall be
in writing and may be delivered by hand, by email in .pdf format or similar format, by nationally recognized private courier, or
by United States mail. Notices delivered by mail shall be deemed given three business days after being deposited in the United
States mail, postage prepaid, registered or certified mail, return receipt requested. Notices delivered by hand shall be deemed
delivered when actually delivered. Notices given by nationally recognized private courier shall be deemed delivered on the date
delivery is promised by the courier. Notices given by email with a confirmation or acknowledgment of transmission (including any
response to such transmission) shall be deemed given when transmitted. Notices, demands and communications to each Party shall
be sent to the following address and other information applicable for the method of notice used:

 

	If to Borrower:	
        Humanigen, Inc.

        533 Airport Blvd., #400

        Burlingame, CA 94010

        Attn: Dr. Cameron Durrant

        E-mail: cdurrant@humanigen.com

         

	 	 
	If to Lender:	
        [NAME]

        [ADDRESS LINE 1]

        [ADDRESS LINE 2]

        Attn:

        E-mail:

         

or to such other respective
addresses or fax numbers as each Party may designate by notice given in accordance with the foregoing provisions of this Section
10.

 

11.       WAIVER
OF JURY TRIAL AND COUNTERCLAIMS. TO THE FULLEST EXTENT PERMITTED BY LAW, AND AS SEPARATELY BARGAINED-FOR CONSIDERATION TO LENDER,
BORROWER HEREBY WAIVES ANY RIGHT TO TRIAL BY JURY (WHICH LENDER ALSO WAIVES) IN ANY ACTION, SUIT, PROCEEDING OR COUNTERCLAIM OF
ANY KIND ARISING OUT OF OR OTHERWISE RELATING TO ANY OF THE CREDIT DOCUMENTS, THE OBLIGATIONS, THE COLLATERAL, OR LENDER’S
CONDUCT IN RESPECT OF ANY OF THE FOREGOING. TO EFFECTUATE THE FOREGOING, AGENT IS HEREBY GRANTED AN IRREVOCABLE POWER OF ATTORNEY
TO FILE, AS ATTORNEY-IN-FACT FOR BORROWER, A COPY OF THIS NOTE IN ANY DELAWARE COURT, AND THE COPY OF THIS NOTE SO FILED SHALL
CONCLUSIVELY BE DEEMED TO CONSTITUTE BORROWER’S WAIVER OF TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR OTHERWISE RELATING
TO ANY OF THE CREDIT DOCUMENTS, THE OBLIGATIONS, THE COLLATERAL OR LENDER’S CONDUCT IN RESPECT OF ANY OF THE FOREGOING.

 

    	 	6 	 

    	 

    

 

12.          Appointment
of Agent. The Lender hereby designates the Agent to act as the contractual representative for the Lender with respect
to this Note and the Security Agreement. The Lender hereby authorizes the Agent to take such action on its behalf under the provisions
of this Note and the Security Agreement, and to exercise such powers and perform such duties hereunder and thereunder as are specifically
delegated to it hereunder or under the Security Agreement or required of the Agent by the terms hereof or thereof, together with
such other powers as are reasonably incidental thereto.

 

13.          Miscellaneous.

 

(a)       Time
is of the essence in this Note.

 

(b)       The
provisions of this Note shall be deemed severable and if any portion shall be held invalid, illegal or unenforceable for any reason,
the remainder of this Note shall be effective and binding upon the Parties, and interpreted in a manner consistent with the parties’
original intent prior to the severance of this Note, to the extent reasonably practicable.

 

(c)       This
Note and the other Credit Documents collectively: (i) constitute the final expression of the agreement between Borrower and Lender
concerning the Loan; (ii) contain the entire agreement between Borrower and Lender respecting the matters set forth herein and
in such other Credit Documents; and (iii) may not be contradicted by evidence of any prior or contemporaneous oral agreements or
understandings between Borrower and Lender. Neither this Note nor any of the terms hereof may be terminated, amended, supplemented,
waived or modified orally, but only by an instrument in writing executed by the party against which enforcement of the termination,
amendment, supplement, waiver or modification is sought.

 

(d)       If
there is a conflict between or among the terms, covenants, conditions or provisions of this Note and the other Credit Documents,
any term, covenant, condition or provision that Lender may elect to enforce from time to time so as to enlarge the interest of
Lender in its security for the Obligations, afford Lender the maximum financial benefits or security for the Obligations, or provide
Lender the maximum assurance of payment of the Loan and the Obligations in full shall control. BORROWER ACKNOWLEDGES AND AGREES
THAT IT HAS BEEN PROVIDED WITH SUFFICIENT AND NECESSARY TIME AND OPPORTUNITY TO REVIEW THE TERMS OF THIS NOTE AND EACH OF THE CREDIT
DOCUMENTS WITH ANY AND ALL COUNSEL IT DEEMS APPROPRIATE, AND THAT NO INFERENCE IN FAVOR OF, OR AGAINST, LENDER OR BORROWER SHALL
BE DRAWN FROM THE FACT THAT EITHER SUCH PARTY HAS DRAFTED ANY PORTION OF THIS NOTE OR ANY OF THE CREDIT DOCUMENTS.

 

 

[Remainder of page intentionally left
blank; signature page follows]

 

    	 	7 	 

    	 

    

 

IN WITNESS WHEREOF,
Borrower has executed and delivered this Note to Lender and Lender has accepted this Note from Borrower as of the day and year
first above written.

 

 

	 	Humanigen, Inc., 
	 	a Delaware corporation 
	 	 	 
	 	 	 
	 	 	 
	 	By: /s/ Greg Jester
	 	Name:	Greg Jester
	 	Title:	Chief Financial Officer

 

 

[SIGNATURE PAGE TO SECURED PROMISSORY NOTE]

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