EX-10.1





 Exhibit 10.1 

CONSULTING AGREEMENT 

THIS CONSULTING AGREEMENT (“Agreement”) is made by and between
HORIZON THERAPEUTICS USA, INC. with its principal place of business at 1 Horizon Way, Deerfield, IL 60015 (“Company”) and ZHENGBIN
YAO, an individual residing at              (“Consultant”), for the purpose of setting forth the exclusive terms and conditions by which
Company will, contingent upon the consummation of the Merger (as defined below) acquire Consultant’s services on a limited and temporary basis. Company and Consultant may be referred to herein individually as a “Party,” or
collectively as the “Parties.” 
 WHEREAS, Company, Teiripic Merger Sub, Inc. (“Purchaser”),
Horizon Therapeutics plc, and Viela Bio, Inc. (“Target”) entered into an Agreement and Plan of Merger on January 31, 2021 (the “Merger Agreement”) which provides, among other things, for Purchaser to commence a
cash tender offer (the “Offer”) to acquire all of the outstanding shares of common stock, par value $0.001 per share, of Target, and following the consummation of the Offer, the merger of Purchaser with and into Target, with Target
continuing as the surviving corporation and as an indirect wholly owned subsidiary of Company (the “Merger”), upon the terms and subject to the conditions set forth in the Merger Agreement; and 

WHEREAS, Consultant has agreed to enter into this Agreement as further inducement for the Company to enter into the Merger. 

NOW THEREFORE, in consideration of the mutual obligations specified in this Agreement, and any compensation paid to Consultant for his
services, the Parties agree to the following: 
 1. Work, Payment and Term. Attached to this Agreement as
EXHIBIT A hereto is a statement of the work performed or to be performed by Consultant, the payment terms for such work, the types of any expenses to be paid in connection with such work, any Background Technology (as defined
in Section 3) to be used by Consultant in performing the work, the term of this Agreement, and such other terms and conditions as the Parties deem appropriate or necessary for the performance of the work. Consultant shall perform all such work
himself, engaging the assistance of other individuals only with the prior written consent of Company. While on Company’s premises, Consultant agrees to comply with Company’s then-current access rules and procedures, including those related
to safety, security and confidentiality. Consultant agrees and acknowledges that Consultant has no expectation of privacy with respect to Company’s telecommunications, networking or information processing systems (including stored computer
files, email messages and voice messages) and that Consultant’s activities, including the sending or receiving of any files or messages, on or using those systems may be monitored, and the contents of such files and messages may be reviewed and
disclosed, at any time, without notice. 












 2. Nondisclosure and Trade Secrets. 

(a) During the term of this Agreement and in the course of Consultant’s performance hereunder, Consultant may receive and otherwise
be exposed to confidential and proprietary information owned by Company, its parents, and/or its direct and indirect subsidiaries (including, but not limited to Target) (collectively, with Company, the “Company Parties”) or received
by the Company Parties from third parties pursuant to an obligation of confidentiality with respect thereto, relating to the Company Parties’ business practices, strategies and technologies. Such confidential and proprietary information may
include, but not be limited to, any compound, chemical, peptide, protein, complex, conjugate, virus, extract, media, vector, cell, cell component, cell line, formulation or sample; any procedure, discovery, invention, formula, data, result, idea or
technique; any trade secret, trade dress, copyright, patent or other intellectual property right, or any registration or application therefor, or materials relating thereto; and any information relating to any of the foregoing or to any research,
development, manufacturing, engineering, marketing, servicing, sales, financing, legal or other business activities or to any present or future products, prices, plans, forecasts, suppliers, clients, customers, employees, consultants or investors;
whether in oral, written, graphic or electronic form (collectively referred to as “Information”). 
 (b) Consultant
acknowledges the confidential and secret nature of the Information, and agrees that the Information is the extremely valuable property of Company or of the third party from which Company received such Information. Accordingly, Consultant agrees not
to reproduce any of the Information in any format, not to use the Information except in the performance of the work described in this Agreement, and not to disclose all or any part of the Information in any form to any third party, such obligations
shall apply in each case during the term of this Agreement and for a period of ten (10) years thereafter, except with the prior written consent of Company. Upon termination of this Agreement for any reason, including expiration of the term of
this Agreement, Consultant agrees to cease using and to return to Company all whole and partial copies and derivatives of the Information, whether in Consultant’s possession or under Consultant’s direct or indirect control. 

(c) Consultant shall not disclose or otherwise make available to Company in any manner any confidential information of Consultant or any
information received by Consultant from third parties, unless Company first agrees in writing to receive such information. 
 (d)
Information does not include information that (w) is or becomes a part of the public domain through no act or omission of Consultant, (x) is disclosed to Consultant by a third party without restrictions on disclosure, (y) was in
Consultant’s lawful possession without obligation of confidentiality prior to the disclosure and was not obtained by Consultant either directly or indirectly from Company or (z) was developed or obtained by Consultant in connection with
Consultant’s activities unrelated to the work for the Company under this Agreement. In addition, this section will not be construed to prohibit disclosure of Information to the extent that such disclosure is required by law or valid order of a
court or other governmental authority; provided, however, that unless ordered not to do so by a court or government agency, Consultant will first have given notice to Company to permit the Company to seek a protective order requiring that the
Information so disclosed be used only for the purposes for which the order was issued and will make reasonable efforts at the Company’s cost to assist the Company in its efforts to obtain a protective order. Notwithstanding the foregoing,
pursuant to 18 U.S.C. Section 1833(b), Consultant will not be held criminally or civilly liable under any Federal or State trade secret law for the disclosure of a trade secret that: (1) is made in confidence to a Federal, State, or local
government official, either directly or indirectly, or to an attorney, and solely for the purpose of reporting or investigating a suspected violation of law; or (2) is made in a complaint or other document filed in a lawsuit or other
proceeding, if such filing is made under seal. 

  
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 3. Ownership of Work Product. 

(a) Consultant shall specifically describe and identify in EXHIBIT A to this Agreement any and all technology,
including without limitation information, materials and related intellectual property rights, which (i) Consultant intends to use in performing the work under this Agreement, (ii) is either owned solely by Consultant or controlled by
Consultant such that Consultant possesses the right to grant a license or sublicense thereunder, and (iii) is in existence prior to the date hereof (“Background Technology”). If no such information is listed in
EXHIBIT A, then Consultant represents and agrees that it is because there is no Background Technology. 
 (b)
Consultant agrees that any and all ideas, developments, discoveries, improvements, inventions and works of authorship conceived, written, created, tested, or first reduced to practice in the performance of work under this Agreement, including but
not limited to any and all ideas, developments, discoveries, improvements, inventions and works of authorship that are in any way conceived, written, created, improved, tested or first reduced to practice by use of any of Company’s supplies,
equipment, facilities, resources, or trade secret information, together with all intellectual property rights relating thereto (“Work Product”) shall be the sole and exclusive property of Company. Consultant hereby assigns and
transfers to Company all its right, title and interest in and to any and all such Work Product. If Consultant has any rights to Work Product that cannot, under applicable law, be assigned to Company, Consultant unconditionally and irrevocably waives
the enforcement of such rights and all claims and causes of action of any kind against Company with respect to such rights. Consultant agrees, at Company’s request and expense, to consent to and join in any action to enforce such rights. If
Consultant has any right to Work Product that can neither be assigned to Company nor waived by Consultant, Consultant hereby grants to Company an exclusive, irrevocable, perpetual, worldwide, fully paid and royalty free license, with rights to
sublicense through multiple levels of sublicensees, to develop, make, have made, use, sell, have sold, offer for sale and import such Work Product. Consultant agrees to maintain written records of all Work Product and to promptly make full written
disclosure to Company of all Work Product. 
 (c) Company acknowledges that Consultant shall retain all of Consultant’s rights
in: (i) any Background Technology; and (ii) any intellectual property developed by or reduced to practice by Consultant in connection with his activities unrelated to the work for the Company under this Agreement, provided that such
intellectual property does not relate to the work Consultant performs for the Company, is developed or reduced to practice by Consultant outside Consultant’s work for the Company and is developed or reduced to practice by Consultant without the
use of the Company’s facilities or resources, including the Company’s Confidential Information. Consultant hereby grants to Company a non-exclusive, irrevocable, perpetual, worldwide, fully paid and
royalty free license, with rights to sublicense through multiple levels of sublicensees, under the Background Technology to develop, make, have made, use, sell, have sold, offer for sale and import Company products, including Work Product. To the
extent that any third parties have rights in any such Background Technology, Consultant hereby represents and warrants that such third party or parties have validly and irrevocably granted to Consultant the right to grant the license stated above.


  
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 (d) Consultant further agrees to execute all papers, including without limitation all
patent applications, invention assignments and copyright assignments, and otherwise assist Company as reasonably required to perfect Company’s right, title and interest in Work Product as expressly granted to Company under this Agreement. Such
assistance shall include but not be limited to providing affidavits or testimony in connection with patent interference, validity or infringement proceedings and participating in other legal proceedings. Reasonable costs related to such assistance,
if required, shall be paid by Company. Consultant’s obligation to assist Company as described above in this paragraph shall continue beyond the termination of this Agreement. If Company is unable, after reasonable effort, to secure
Consultant’s signature on any document as provided in this Section 3, Consultant hereby designates and appoints Company and its duly authorized officers and agents as its agent and attorney in fact to execute, verify and file applications,
and to do all other lawfully permitted acts necessary to achieve the intent of this Section 3 with the same legal force and effect as if executed by Consultant. 

4. Conflicting Engagements. Consultant will notify Company in writing prior to entering into any employment or consulting
arrangement with one or more third parties which involves either subject matter substantially similar to services that Consultant is to provide hereunder, services which Consultant is to provide for the benefit of third parties who are competitors
of Company, or services that Company might reasonably determine would impair Consultant’s ability to provide the services described in EXHIBIT A or otherwise fulfill his
responsibilities or obligations provided for in this Agreement. During the term of this Agreement, Consultant shall not accept any employment or consulting work which conflicts with Consultant’s obligations to Company hereunder or which may
involve use or disclosure of Information other than as permitted hereunder. 
 5. Term; Termination. This Agreement shall not
be effective unless and until the Merger is consummated, and in such case, shall become effective as of the Effective Time (as defined in the Merger Agreement). For the avoidance of doubt, if the anticipated transactions contemplated in the Merger
Agreement do not close, this Agreement will have no effect, will not be binding on Company (or any of its affiliates) or on Consultant, shall terminate as of the termination of the Merger Agreement, and neither Consultant, Company nor Purchaser (or
any of their respective affiliates) shall have rights or obligations hereunder. The duration of the term of this Agreement shall be as set forth in EXHIBIT A, unless previously terminated pursuant to this Section 5.
Company may terminate this Agreement for any reason upon thirty (30) days prior written notice to Consultant, with no further obligations or liability owed to Consultant. Company may terminate this Agreement immediately upon notice in the event
that Company reasonably determines that Consultant: (1) materially breaches this Agreement in any manner, including, inter alia, a breach of Section 4, or (2) commits any acts, or engages in any activities, that Company reasonably
determines are unlawful, dishonest or detrimental to the best interests of Company. Consultant may terminate this Agreement for any reason upon thirty (30) days prior written notice. In the event this Agreement is terminated or expires, for
whatever reason, Consultant shall cease work immediately after receiving notice from Company, return all Information (including all copies thereof) as provided in Section 2, deliver all Work Product and related documentation to Company, and
provide Company with an invoice for any work for which compensation has not already been paid, with any partial month being paid based on the number of days this Agreement remained in effect during that month. Sections 2, 3, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16 and 17 shall survive the termination of this Agreement for any reason, including expiration of the term of this Agreement. 

  
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 6. Compliance with Applicable Laws. Consultant warrants that all materials
supplied and work performed under this Agreement shall be in compliance with all applicable laws and regulations. 
 7. Independent
Contractor. Consultant is an independent contractor, is not an agent or employee of Company and is not authorized to act on behalf of Company. Consultant will not be eligible for any employee benefits, nor will Company make deductions from any
amounts payable to Consultant for taxes or social securities. Payment of all taxes and social securities due on any amounts paid to Consultant hereunder shall be the sole responsibility of Consultant. Upon Consultant filing his Form 1040 Individual
US Federal Income Tax return, Consultant shall provide Company with a signed Form 4669, “Statement of Payments Received” attesting that Consultant reported the amounts received from Company for services performed during the year as taxable
income. 
 8. Non-Solicitation. For the period of this Agreement and for one
(1) year thereafter, Consultant will not, either directly or indirectly, solicit or attempt to solicit any employee, independent contractor, or consultant of Company to terminate his, her, or its relationship with, Company in order to become an
employee, consultant, or independent contractor to or for any other person or entity. 
 9. Assignment. The Parties’
rights and obligations under this Agreement will bind and inure to the benefit of their respective successors and assigns, except that Consultant may not delegate, subcontract or assign this Agreement, or any of his obligations or rights under this
Agreement, without Company’s prior written consent. 
 10. Complete Agreement. This Agreement and
EXHIBIT A, attached hereto and hereby incorporated herein, constitute the Parties’ final, exclusive and complete understanding and agreement with respect to the subject matter hereof, and supersede all prior and
contemporaneous understandings and agreements relating to its subject matter. 
 11. Waiver; Amendment; Severability. This
Agreement may not be waived, modified or amended unless mutually agreed upon in writing by both Parties. The waiver by Company of a breach of any provision of this Agreement by Consultant will not operate or be construed as a waiver of any other or
subsequent breach by Consultant. In the event any provision of this Agreement is found to be legally unenforceable, such unenforceability shall not prevent enforcement of any other provision of the Agreement. 

12. Choice of Law. This Agreement shall be governed by the laws of the State of Illinois, without regard to any conflicts of law
principals thereof that would call for the application of the laws of any other jurisdiction. The Parties consent to the exclusive jurisdiction and venue of the federal court in the Northern District of Illinois, and state courts located in the
state of Illinois, county of Cook. Nothing in this Section 12 limits the rights of the Parties to seek appeal of a decision of an Illinois court outside of Illinois that has proper jurisdiction over the decision of a court sitting in Illinois.


  
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 13. Notice. For the purposes of this Agreement, notices, demands, and all
other forms of communication provided for in this Agreement shall be in writing and shall be deemed to have been duly given when delivered or (unless otherwise specified) mailed by registered mail, return receipt requested, postage prepaid, or by
confirmed facsimile, addressed as set forth below, or to such other address as any Party may have furnished to the other in writing in accordance herewith, except that notices of address shall be effective only upon receipt, as follows: 

If to Company: 
 Horizon
Therapeutics USA, Inc. 
 1 Horizon Way 

Deerfield, IL 60015 
 Attention:
Human Resources, Irina Konstantinovsky 
 Executive Vice President, Chief Human Resources Officer 

With a copy to: 
 Horizon
Therapeutics USA, Inc. 
 1 Horizon Way 

Deerfield, IL 60015 
 Attention:
Legal Department, Nelson Alexander 
 Horizon Therapeutics USA, Inc. 

1 Horizon Way 
 Deerfield, IL
60015 
 Attention: Chairman, President and CEO, Timothy Walbert 

If to Consultant: 

Zhengbin Yao 
 Email: 

Any such written notice shall be deemed given on the earlier of the date on which such notice is personally delivered or upon confirmation of receipt in case
of registered mail or electronic mail. Either Party may change its address for notices by giving written notice to the other Party in the manner specified in this section. 

14. Execution in Facsimile and Electronic Signatures. Facsimile and electronically transmitted signatures shall have the same
force and effect as original signatures. 
 15. Execution in Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original and all of which together shall constitute a single instrument. 

  
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 16. Legal and Equitable Remedies. Consultant hereby acknowledges and agrees
that in the event of any breach of this Agreement by Consultant, including, without limitation, the actual or threatened disclosure of Information without the prior express written consent of Company, Company will suffer an irreparable injury, such
that no remedy at law will afford it adequate protection against, or appropriate compensation for, such injury. Accordingly, Consultant agrees that Company shall have the right to enforce this Agreement and any of its provisions by injunction,
specific performance or other equitable relief, without bond and without prejudice to any other rights and remedies that Company may have for a breach of this Agreement. 

17. Warranty; Indemnification. Consultant warrants that he or she has good and marketable title to all Work Product. Consultant
further warrants that the Work Product shall be free and clear of all liens, claims, encumbrances or demands of third parties, including any claims by any such third parties with respect to such third parties’ intellectual property rights in
the Work Product. Consultant warrants that Consultant has not been debarred under any applicable law, rule or regulation including, without limitation, Section 306 (a) or 306 (b) of the Federal Food, Drug and Cosmetic Act (codified at 21 U.S.C.
335(a) and 335(b)). Consultant covenants that should Consultant be convicted in the future of any act for which a person can be debarred as described in any applicable law, rule or regulation including, without limitation, Section 306 (a) or
306 (b) of the Federal Food, Drug and Cosmetic Act, Consultant shall immediately notify Company of such conviction in writing. Consultant shall indemnify, defend and hold harmless Company and its officers, agents, directors, employees, and customers
from and against any claim, liability, loss, judgment or expense (including reasonable attorneys’ and expert witnesses’ fees and costs) resulting from or arising out of any such claims by any third parties which are based upon or are the
result of any breach of such warranties. Should Company permit Consultant to use any of Company’s equipment, tools or facilities (the “Company Equipment”) in the performance of the services during the term of this Agreement,
such permission will be gratuitous and Consultant shall indemnify, defend and hold harmless Company and its officers, directors, agents and employees from and against any claim, loss, expense or judgment of injury to person or property (including
death) arising out of Consultant’s willful misconduct or negligent use of any such Company Equipment. 
 [Signature page follows]


  
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 IN WITNESS WHEREOF, the Parties have signed this Agreement on the date(s) written
below. 
  

							
	ZHENGBIN YAO	 		 	HORIZON THERAPEUTICS USA, INC.
				
	 By: /s/ Zhengbin
Yao                                         
                   
  

Date: 2/27/2021
	 		 	 By:
 Name:

Title:
  

Date:
	 	 /s/ Timothy Walbert

Timothy Walbert
 Chief Executive Officer

 
 2/27/2021


  

  
 [Signature Page to
Consulting Agreement] 













 EXHIBIT A 

Work to be performed: 
 Consultant will provide services
supporting Company’s research and development programs and the integration of Viela Bio, Inc. into Company. Consultant’s activities will be directed by Timothy Walbert (“Walbert”), or any Company representative designated by
Walbert, and Consultant will report to Walbert, or any Company representative designated by Walbert. 
  

	
	Background Technology (if any):
                                         
                                         
                                         
                                         
                          
	  

	  

	  

	  

	                                      
                                         
                             

 Type or rate of payment: Company will pay Consultant, in consideration of the services to be provided under the
Agreement, at a rate of $50,000.00 per month, payable on approximately the 15th day of each month during the Term. 

For the avoidance of doubt, such payments are made in advance of such compensation being earned by Consultant, and such compensation is not fully earned until
the services are completed for the entire calendar month. Consultant shall not earn, and shall reimburse the Company for, any unearned compensation advances for the portion of the calendar month in which no services were performed due to the
termination of the Agreement. 
 Travel expenses: Company will pay Consultant’s reasonable traveling expenses, incurred at Company’s
written request and with its advance approval, in accordance with the procedures Company establishes from time to time. 
 Term: The term of
this Agreement shall commence as of the Effective Time (as defined in the Merger Agreement) and, unless earlier terminated as provided for in Section 5 of the Agreement, shall expire on the one (1) year anniversary of the Effective Time,
unless the length of the term is extended in a writing signed by both Parties. 
 Other terms (if any): Consultant will work remotely, but will
remain available, upon reasonable request and notice, to travel to Company facilities in the US or such other locations as reasonably requested by Company.