Document:

EX-10.1

 Exhibit 10.1 

VOTING AGREEMENT 

THIS VOTING AGREEMENT (this “Voting Agreement”) is entered into as of
March 18, 2014, by and among VIDARA THERAPEUTICS INTERNATIONAL LTD., an Irish private limited company (“Vidara”), Horizon PHARMA, INC., a
Delaware corporation (the “Company”) and [            ] (“Stockholder”). 

RECITALS 

A. Stockholder is a holder of record and the “beneficial owner” (within the meaning of Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the “Exchange Act”)) of certain shares of common stock of the Company. 
 B.
Vidara Therapeutics Holdings LLC, a Delaware limited liability company (“Holdings”), Vidara, Hamilton Holdings (USA), Inc., a Delaware corporation and an indirect wholly-owned subsidiary of Vidara (“U.S.
Holdco”), Hamilton Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of U.S. Holdco (“Merger Sub”) and the Company are entering into a Transaction Agreement and Plan of Merger of even date herewith (the
“Merger Agreement”), which provides (subject to the conditions set forth therein), among other things, for the merger of Merger Sub with and into the Company (the “Merger”). 

C. As a result of the Merger, each outstanding share of common stock of the Company (“Company Common Stock”) will be
converted into the right to receive ordinary shares of Vidara. 
 D. Stockholder is entering into this Voting Agreement in order to
induce Vidara and Holdings to enter into the Merger Agreement and cause the Merger to be consummated. 
 AGREEMENT 

The parties to this Voting Agreement, intending to be legally bound, agree as follows: 

SECTION 1. CERTAIN DEFINITIONS 

For purposes of this Voting Agreement: 

(a) “Expiration Date” shall mean the earliest of: (i) the date on which the Merger Agreement is
terminated pursuant to the terms of the Merger Agreement; or (ii) immediately following the adjournment of the meeting of the stockholders of the Company at which the Merger Agreement is adopted and approved by the stockholders of the Company.

 (b) Stockholder shall be deemed to “Own” or to have acquired “Ownership” of a
security if Stockholder: (i) is the record owner of such security; or (ii) is the “beneficial owner” (within the meaning of Rule 13d-3 under the Exchange Act) of such security. 

 (c) “Person” shall mean any individual, private or public
company, corporation (including not-for-profit), general or limited partnership, unlimited or limited liability company, joint venture, estate, trust, association, organization or other entity of any kind or nature, including a government or
political subdivision or an agency or instrumentality thereof. 
 (d) “Subject Securities” shall
mean: (i) all securities of the Company (including all shares of Company Common Stock and all options, restricted stock units, warrants and other rights to acquire shares of Company Common Stock) Owned by Stockholder as of the date of this
Voting Agreement; and (ii) all additional securities of the Company (including all additional shares of Company Common Stock and all additional options, restricted stock units, warrants and other rights to acquire shares of Company Common
Stock) of which Stockholder acquires Ownership during the Voting Period (whether such acquisition is a result of purchases or other transfers of Company Common Stock to Stockholder or by virtue of a stock dividend, stock split, recapitalization,
reclassification, subdivision, combination or exchange of shares). 
 (e) A Person shall be deemed to have effected a
“Transfer” of a security if such Person directly or indirectly: (i) sells, pledges, encumbers, grants an option with respect to, transfers or disposes of such security or any interest in such security to any Person other than
Vidara; (ii) enters into an agreement or commitment contemplating the possible sale of, pledge of, encumbrance of, grant of an option with respect to, transfer of or disposition of such security or any interest therein to any Person other than
Vidara; or (iii) reduces such Person’s beneficial ownership of, interest in or risk relating to such security. 

(f) “Voting Period” shall mean the period commencing on the date of this Voting Agreement and ending on
the Expiration Date. 
 SECTION 2. TRANSFER OF SUBJECT SECURITIES AND
VOTING RIGHTS 
 2.1 Restriction on Transfer of Subject Securities. Subject to Section 2.3,
during the Voting Period, Stockholder shall not, directly or indirectly, cause or permit any Transfer of any of the Subject Securities to be effected; provided, however, that nothing contained in this Voting Agreement will be deemed to
restrict the ability of Stockholder to do any of the following: (a) to exercise any equity awards held by Stockholder; (b) to sell Securities in connection with equity awards (including restricted stock units) following the date of this
Voting Agreement solely for the purpose of paying withholding tax in connection with such awards; (c) change the participation level under the Company’s 2005 Stock Plan, 2011 Equity Incentive Plan and 2011 Employee Stock Purchase Plan.

 2.2 Restriction on Transfer of Voting Rights. During the Voting Period, Stockholder shall ensure that: (a) none of the
Subject Securities is deposited into a voting trust; and (b) no proxy is granted that is inconsistent with this Voting Agreement, and no voting agreement or similar agreement is entered into, with respect to any of the Subject Securities. 

  
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 2.3 Permitted Transfers. Section 2.1 shall not prohibit a Transfer of Subject
Securities by Stockholder: (a) if Stockholder is an individual: (i) to any member of Stockholder’s immediate family; or to a trust for the benefit of Stockholder or any member of Stockholder’s immediate family; or (ii) upon
the death of Stockholder; (b) if Stockholder is a partnership or limited liability company, to one or more partners or members of Stockholder or to an affiliated corporation under common control with Stockholder; or (c) a Transfer of up to
fifteen percent (15%) of the Subject Securities held by the Stockholder as of the date hereof; provided, however, that a Transfer referred to in this Section 2.3(a) and (b) shall be permitted only if, as a precondition to such
Transfer, the transferee agrees in a writing, reasonably satisfactory in form and substance to the Company and Vidara, to be bound by all of the terms of this Voting Agreement. Any Transfer or purported Transfer of Subject Securities other than
in accordance with this Section 2.3 shall be void ab initio and of no effect. 
 SECTION 3. VOTING OF
SHARES 
 3.1 VOTING COVENANT. Stockholder hereby agrees that, prior to the
Expiration Date, at any meeting of the stockholders of the Company, however called, or at any adjournment or postponement thereof and on every action or approval by written consent of the stockholders of the Company, unless otherwise directed in
writing by Vidara, Stockholder shall cause any and all issued and outstanding shares of Company Common Stock Owned by Stockholder as of the record date with respect to such meeting to be voted: 

(a) in favor of the Merger, the execution and delivery by the Company of the Merger Agreement and the adoption and
approval of the Merger Agreement and the terms thereof, in favor of each of the other actions contemplated by the Merger Agreement and in favor of any action in furtherance of any of the foregoing; 

(b) in favor of any proposal to adjourn or postpone the meeting of the stockholders of the Company to a later date if
there are not sufficient votes for adoption of the Merger Agreement on the date on which such meeting is held; 
 (c)
against any action or agreement that would result in a breach of any representation, warranty, covenant or obligation of the Company in the Merger Agreement; and 

(d) against any action which is (i) intended to impede, interfere with, delay, postpone, discourage or adversely
affect the Merger or any of the other transactions contemplated by the Merger Agreement or this Voting Agreement, or (ii) would reasonably be expected, to impede, interfere with, delay, materially postpone, discourage or adversely affect in any
way the Merger or any of the other transactions contemplated by the Merger Agreement or this Voting Agreement. 

  
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 Prior to the Expiration Date, Stockholder shall not enter into any agreement or understanding
with any Person to vote or give instructions with respect to such shares of Company Common Stock Owned by Stockholder in any manner inconsistent with clause “(a)”, clause “(b)”, clause “(c)” or clause “(d)” of
the preceding sentence. 
 3.2 PROXY 

(a) Contemporaneously with the execution of this Voting Agreement: (i) Stockholder shall deliver to Vidara a proxy
in the form attached to this Voting Agreement as Exhibit A, which shall be irrevocable to the fullest extent permitted by law (at all times during the Voting Period) with respect to the shares referred to therein (the
“Proxy”); and (ii) if applicable, Stockholder shall cause to be delivered to Vidara an additional proxy (in the form attached hereto as Exhibit A) executed on behalf of the record owner of any outstanding shares of
Company Common Stock that are owned beneficially (within the meaning of Rule 13d-3 under the Exchange Act), but not of record by Stockholder. 

(b) Stockholder shall not enter into any tender, voting or other agreement, or grant a proxy or power of attorney, with
respect to the Subject Securities that is inconsistent with this Voting Agreement or otherwise take any other action with respect to the Subject Securities that would in any way restrict, limit or interfere with the performance of Stockholder’s
obligations hereunder or the transactions contemplated hereby. 
 SECTION 4. REPRESENTATIONS AND WARRANTIES
OF STOCKHOLDER 
 Stockholder hereby represents and warrants to Vidara as follows: 

4.1 Authorization, etc. Stockholder has the power, authority and capacity to execute and deliver this Voting Agreement and the Proxy
and to perform Stockholder’s obligations hereunder and thereunder. This Voting Agreement and the Proxy have been duly executed and delivered by Stockholder and, assuming the due authorization, execution and delivery of this Voting Agreement by
Vidara, constitute legal, valid and binding obligations of Stockholder, enforceable against Stockholder in accordance with their terms, subject to: (a) laws of general application relating to bankruptcy, insolvency and the relief of debtors;
and (b) rules of law governing specific performance, injunctive relief and other equitable remedies. 
 4.2 No Conflicts or
Consents. 
 (a) The execution and delivery of this Voting Agreement and the Proxy by Stockholder do not, and the
performance of this Voting Agreement and the Proxy by Stockholder will not: (i) conflict with or violate any law applicable to Stockholder or by which Stockholder or any of Stockholder’s properties is or may be bound or affected; or
(ii) result in or constitute (with or without notice or lapse of time) any breach of or default under, or give to any other Person (with or without notice or lapse of time) 

  
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any right of termination, amendment, acceleration or cancellation of, or result (with or without notice or lapse of time) in the creation of any material lien on any of the Subject Securities.

 (b) The execution and delivery of this Voting Agreement and the Proxy by Stockholder do not, and the performance of
this Voting Agreement and the Proxy by Stockholder will not, require any consent of any Person. 
 4.3 Title to Securities. As of the
date of this Voting Agreement: (a) Stockholder holds of record (free and clear of any liens (other than immaterial liens)) the number of outstanding shares of Company Common Stock set forth under the heading “Shares Held of Record” on
the signature page hereof; (b) Stockholder holds (free and clear of any liens (other than immaterial liens)) the options, restricted stock units, warrants and other rights to acquire shares of Company Common Stock set forth under the heading
“Options and Other Rights” on the signature page hereof; (c) Stockholder Owns the additional securities of the Company set forth under the heading “Additional Securities Beneficially Owned” on the signature page hereof; and
(d) Stockholder does not directly or indirectly Own any shares of capital stock or other securities of the Company, or any option, restricted stock unit, warrant or other right to acquire (by purchase, conversion or otherwise) any shares of
capital stock or other securities of the Company, other than the shares and options, restricted stock units, warrants and other rights set forth on the signature page hereof. 

4.4 Accuracy of Representations. The representations and warranties contained in this Voting Agreement are accurate in all respects as
of the date of this Voting Agreement, and will be accurate in all respects at all times prior to the Expiration Date as if made as of any such time or date. 

SECTION 5. MISCELLANEOUS 

5.1 Stockholder Information. Stockholder hereby agrees to permit Vidara and the Company to publish and disclose in the proxy statement
and any other public disclosure that Vidara and the Company mutually determine to be necessary or desirable in connection with the Merger and any other transactions contemplated by the Merger Agreement the following information: Stockholder’s
identity and ownership of shares of Company Common Stock and the nature of Stockholder’s commitments, arrangements and understandings under this Voting Agreement. 

5.2 Further Assurances. From time to time and without additional consideration, Stockholder shall execute and deliver, or cause to be
executed and delivered, such additional transfers, assignments, endorsements, proxies, consents and other instruments, and shall take such further actions, as Vidara may reasonably request for the purpose of carrying out and furthering the intent of
this Voting Agreement. 
 5.3 Expenses. All costs and expenses incurred in connection with the transactions contemplated by this
Voting Agreement shall be paid by the party incurring such costs and expenses. 

  
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 5.4 Notices. All notices hereunder shall be sufficiently given for all purposes hereunder
if in writing and delivered personally, sent by documented internationally-recognized overnight delivery service or, to the extent receipt is confirmed, telecopy, facsimile or other electronic transmission service to the appropriate address or
number as set forth below, or to such other address as any party shall provide by like notice to the other parties to this Voting Agreement: 

if to Stockholder: 
 at the
address set forth on the signature page hereof; and 
 if to Vidara: 

[—] 

[Address] 
 [—] 
 Attention: [—] 

Facsimile No.: [—] 

with copies to: 
 Mayer Brown LLP

 1675 Broadway 
 New York, New
York 10019 
 Attention: Reb D. Wheeler 

Facsimile No.: (212) 849-5914 

and 
 A&L Goodbody 

The Chrysler Building 
 405
Lexington Avenue 
 Suite 33D 

New York, New York 10174 

Attention: Cian McCourt 

Facsimile No.: (212) 333-5126 

if to the Company: 
 [—] 
 [Address] 

[—] 

Attention: [—] 

Facsimile No.: [—] 

  
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 With a copy to: 

[—] 

[Address] 
 Attention: [—] 
 Facsimile No.: [—] 

5.5 Severability. Any term or provision of this Voting Agreement that is invalid or unenforceable in any situation in any jurisdiction
shall not affect the validity or enforceability of the remaining terms and provisions of this Voting Agreement or the validity or enforceability of the offending term or provision in any other situation or in any other jurisdiction. Upon such
determination that any term or provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Voting Agreement so as to effect the original intent of the parties as closely as possible
in an acceptable manner to the end that the transactions contemplated hereby are fulfilled to the fullest extent possible. 
 5.6 Entire
Agreement. This Voting Agreement, the Proxy, the Merger Agreement and any other documents delivered by the parties in connection herewith constitute the entire agreement between the parties with respect to the subject matter hereof and thereof
and supersede all prior agreements and understandings between the parties with respect thereto. 
 5.7 Amendments. This Voting
Agreement may not be amended, modified, altered or supplemented other than by means of a written instrument duly executed and delivered on behalf of each of the parties to this Voting Agreement. 

5.8 Assignment; Binding Effect; No Third Party Rights. Except as provided herein, neither this Voting Agreement nor any of the
interests or obligations hereunder may be assigned or delegated by Stockholder, and any attempted or purported assignment or delegation of any of such interests or obligations shall be void. Subject to the preceding sentence, this Voting Agreement
shall be binding upon Stockholder and Stockholder’s heirs, estate, executors and personal representatives and Stockholder’s successors and assigns, and shall inure to the benefit of Vidara and its successors and assigns. Without limiting
any of the restrictions set forth in Section 2, Section 3 or elsewhere in this Voting Agreement, this Voting Agreement shall be binding upon any Person to whom any Subject Securities are transferred. Nothing in this Voting Agreement is
intended to confer on any Person (other than Vidara and its successors and assigns) any rights or remedies of any nature. 
 5.9 Specific
Performance. The parties agree that irreparable damage would occur in the event that any of the provisions of this Voting Agreement or the Proxy were not performed in accordance with its specific terms or were otherwise breached. Stockholder
agrees that, in the event of any breach or threatened breach by Stockholder of any covenant or obligation contained in Section 2 or 3 of this Voting Agreement or in the Proxy, Vidara shall be entitled (in addition to any other remedy that may
be available to it, including monetary damages) to obtain: (a) a decree or order of specific performance to enforce the observance and performance of such covenant or obligation; and (b) an injunction restraining such breach or threatened
breach. Stockholder further agrees that neither Vidara nor any other Person shall be required to obtain, furnish or post any bond or similar instrument in connection with or as a condition to obtaining any remedy referred to in this
Section 5.9, and Stockholder irrevocably waives any right he or it may have to require the obtaining, furnishing or posting of any such bond or similar instrument. 

  
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 5.10 Attorneys’ Fees. If any legal proceeding is brought relating to this Voting
Agreement or the enforcement of any provision of this Voting Agreement is brought against Stockholder, the prevailing party shall be entitled to recover reasonable attorneys’ fees, costs and disbursements (in addition to any other relief to
which the prevailing party may be entitled). 
 5.11 Non-Exclusivity. The rights and remedies of Vidara under this Voting Agreement
are not exclusive of or limited by any other rights or remedies which it may have, whether at law, in equity, by contract or otherwise, all of which shall be cumulative (and not alternative). 

5.12 Governing Law; Jurisdiction; Waiver of Jury Trial. This Voting Agreement and the Proxy shall be governed by, and construed in
accordance with, the laws of the State of Delaware, regardless of the laws that might otherwise govern under applicable principles of conflicts of laws thereof. In any action between any of the parties arising out of or relating to this Voting
Agreement, the Proxy or any of the transactions contemplated by this Voting Agreement or the Proxy, each of the parties: (a) irrevocably and unconditionally consents and submits to the exclusive jurisdiction and venue of the Chancery Court of
the State of Delaware; (b) irrevocably waives the right to trial by jury; and (c) irrevocably consents to service of process by first class certified mail, return receipt requested, postage prepaid, to the address at which Stockholder or
Vidara, as the case may be, is to receive notice in accordance with Section 5.4. 
 5.13 Counterparts; Exchanges by Facsimile or
Electronic Delivery. This Voting Agreement may be executed in separate counterparts, each of which when so executed and delivered shall be an original, but all such counterparts shall together constitute one and the same instrument. The exchange
of a fully executed Voting Agreement (in counterparts or otherwise) by facsimile or electronic delivery shall be sufficient to bind the parties to the terms and conditions of this Voting Agreement. 

5.14 Captions. The captions contained in this Voting Agreement are for convenience of reference only, shall not be deemed to be a part
of this Voting Agreement and shall not be referred to in connection with the construction or interpretation of this Voting Agreement. 

5.15 Waiver. Subject to the remainder of this Section 5.15, at any time prior to the Expiration Date, any party hereto may:
(a) extend the time for the performance of any of the obligations or other acts of the other parties to this Voting Agreement; (b) waive any inaccuracy in or breach of any representation, warranty, covenant or obligation of the other party
in this Voting Agreement or in any document delivered pursuant to this Voting Agreement; and (c) waive compliance with any covenant, obligation or condition for the benefit of such party contained in this Voting Agreement. No failure on the
part of Vidara to exercise any power, right, privilege or remedy under this Voting Agreement, and no delay on the part of Vidara in exercising any power, right, privilege or remedy under this Voting Agreement, shall operate as a waiver of such
power, right, privilege or remedy; and no single or partial exercise of any such power, right, privilege or remedy shall preclude any other or further exercise thereof or of any 

  
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other power, right, privilege or remedy. Vidara shall not be deemed to have waived any claim available to Vidara arising out of this Voting Agreement, or any power, right, privilege or remedy of
Vidara under this Voting Agreement, unless the waiver of such claim, power, right, privilege or remedy is expressly set forth in a written instrument duly executed and delivered on behalf of Vidara; and any such waiver shall not be applicable or
have any effect except in the specific instance in which it is given. 
 5.16 Independence of Obligations. The covenants and
obligations of Stockholder set forth in this Voting Agreement shall be construed as independent of any other contract between Stockholder, on the one hand, and the Company or Vidara, on the other. The existence of any claim or cause of action by
Stockholder against the Company or Vidara shall not constitute a defense to the enforcement of any of such covenants or obligations against Stockholder. Nothing in this Voting Agreement shall limit any of the rights or remedies of Vidara under the
Merger Agreement, or any of the rights or remedies of Vidara or any of the obligations of Stockholder under any agreement between Stockholder and Vidara or any certificate or instrument executed by Stockholder in favor of Vidara; and nothing in the
Merger Agreement or in any other such agreement, certificate or instrument, shall limit any of the rights or remedies of Vidara or any of the obligations of Stockholder under this Voting Agreement. 

5.17 Other Capacities. Notwithstanding any provision of this Voting Agreement to the contrary, nothing in this Voting Agreement shall
limit or restrict Stockholder from acting in good faith in Stockholder’s capacity as a director or officer of the Company (it being understood that this Voting Agreement shall apply to Stockholder solely in Stockholder’s capacity as a
stockholder of the Company). 
 5.18 Construction. In this Voting Agreement, unless a clear contrary intention appears: 

(a) the singular number includes the plural number and vice versa; 

(b) reference to any Person include such Person’s legal representatives, successors, assigns, but if applicable,
only if such successors and assigns are not prohibited by this Voting Agreement, and reference to a Person in a particular capacity excludes such Person in any other capacity or individually; 

(c) reference to either gender includes the other gender; 

(d) reference to any agreement, schedule, document or instrument means such agreement, schedule, document or instrument
as amended or modified and in effect in accordance with the terms thereof; 
 (e) reference to any law means such law
as amended, modified, codified, replaced or reenacted, in whole or in part, and in effect from time to time, including rules and regulations promulgated thereunder, and reference to any section or other provision of any law means that

  
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provision of such law from time to time in effect and constituting the substantive amendment, modification, codification, replacement or reenactment of such section or other provision; 

(f) “hereunder,” “hereof,” “hereto,” and words of similar import shall be deemed
references to this Voting Agreement as a whole and not to any particular Section or other provision hereof; 
 (g)
“including” (and with correlative meaning “include”) means including without limiting the generality of any description preceding such term; 

(h) any references herein to a specific section, schedule, annex or exhibit shall refer, respectively, to sections,
schedules, annexes or exhibits of this Voting Agreement; 
 (i) references to documents, instruments or agreements
shall be deemed to refer as well to all addenda, exhibits (other than exhibits constituting agreements, which shall only become legally binding upon execution and delivery by the parties thereto), schedules or amendments thereto from time to time.

 [Remainder of page intentionally left blank.] 

  
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 IN WITNESS WHEREOF, Vidara, the Company and
Stockholder have caused this Voting Agreement to be executed as of the date first written above. 
  

			
	VIDARA THERAPEUTICS INTERNATIONAL LTD.
		
	 By:
	 	  

		 	 Name: Samira Saya

Title:    Director

 Signature Page to Voting Agreement 

 
					
	HORIZON PHARMA, INC.
		
	By:	 	  

		 	Name:	 	Timothy P. Walbert
		 	Title:	 	 President, Chief Executive Officer and

Chairman of the Board

		 		 

 Signature Page to Voting Agreement 

 
			
	 [STOCKHOLDER]

		
	 By:
	 	  

		 	 Name:

Title:

Address:

Facsimile:

  

					
	 Shares Held of Record
	  	 Options and Other Rights
	  	 Additional Securities Beneficially Owned

Signature Page to Voting Agreement 

 EXHIBIT A 

FORM OF IRREVOCABLE PROXY 

[attached] 

 IRREVOCABLE PROXY 

The undersigned stockholder (the “Stockholder”) of Horizon Pharma, Inc., a Delaware corporation (the
“Company”), hereby irrevocably (to the fullest extent permitted by law) appoints and constitutes Vidara Therapeutics International Ltd., an Irish private limited company (“Vidara”), and [—] and [—], solely in their capacities as executive officers of Vidara, and each of them, the attorneys and proxies of the Stockholder, with full power
of substitution and resubstitution, to the full extent of the Stockholder’s rights with respect to the outstanding shares of capital stock of the Company owned of record by the Stockholder as of the date of this proxy, which shares are
specified in this proxy, and all shares of capital stock of the Company that may be owned of record by the Stockholder after the date of this proxy, limited to the matters set forth in this Proxy. (The shares of the capital stock of the Company
referred to in the immediately preceding sentence are referred to as the “Shares.”) Upon the execution of this proxy, all prior proxies given by the Stockholder with respect to any of the Shares regarding the matters set forth in
this Proxy are hereby revoked, and the Stockholder agrees that no subsequent proxies inconsistent with this Proxy will be given with respect to any of the Shares. 

This proxy is irrevocable, is coupled with an interest and is granted solely in connection with, and as security for, the Voting Agreement,
dated as of the date hereof, by and among Vidara, the Company and the Stockholder (the “Voting Agreement”), and is granted in consideration of Vidara entering into the Transaction Agreement and Plan of Merger, dated as of the date
hereof, among Vidara Therapeutics Holdings LLC, a Delaware limited liability company (“Holdings”), Vidara, [U.S. Holdco], a Delaware corporation and an indirect wholly-owned subsidiary of Vidara (“U.S. Holdco”),
[Merger Sub], a Delaware corporation and a wholly-owned subsidiary of U.S. Holdco (“Merger Sub”) and the Company. This proxy will terminate on the Expiration Date (as defined in the Voting Agreement). 

Prior to the Expiration Date, the attorneys and proxies named above will only be empowered, and may only exercise this proxy, to vote any
Shares owned by the undersigned, at any meeting of the stockholders of the Company, however called, or at any adjournment or postponement thereof and on every action or approval by written consent of the stockholders of the Company: 

(a) in favor of the Merger (as defined in the Voting Agreement), the execution and delivery by the Company of the Merger
Agreement and the adoption and approval of the Merger Agreement and the terms thereof, in favor of each of the other actions contemplated by the Merger Agreement and in favor of any action in furtherance of any of the foregoing, all in accordance
with the Merger Agreement and not otherwise; 
 (b) in favor of any proposal to adjourn or postpone the meeting of the
stockholders of the Company to a later date if there are not sufficient votes for adoption of the Merger Agreement on the date on which such meeting is held; 

(c) against any action or agreement that would result in a breach of any representation, warranty, covenant or
obligation of the Company in the Merger Agreement; and 

 (d) against any action which is (i) intended to impede, interfere
with, delay, postpone, discourage or adversely affect the Merger or any of the other transactions contemplated by the Merger Agreement or this Voting Agreement, or (ii) would reasonably be expected, to impede, interfere with, delay, materially
postpone, discourage or adversely affect in any way the Merger or any of the other transactions contemplated by the Merger Agreement or this Voting Agreement. 

The Stockholder may vote the Shares on all other matters not specifically and expressly referred to in this proxy in the preceding paragraph,
and the attorneys and proxies named above may not exercise this proxy with respect to such other matters. 
 This proxy shall be binding
upon the heirs, estate, executors, personal representatives, successors and assigns of the Stockholder (including any transferee of any of the Shares). 

Any term or provision of this proxy that is invalid or unenforceable in any situation in any jurisdiction shall not affect the validity or
enforceability of the remaining terms and provisions of this proxy or the validity or enforceability of the offending term or provision in any other situation or in any other jurisdiction. Upon such determination that any term or provision is
invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this proxy so as to effect the original intent of the parties as closely as possible in an acceptable manner to the end that the transactions
contemplated hereby are fulfilled to the fullest extent possible. 
  

			
	Dated:                         , 2014	  	STOCKHOLDER
		
		  	  

		
		  	Number of shares of common stock of the Company owned of record as of the date of this proxy:
		
		  	  

 Signature Page to Irrevocable ProxyEX-10.26

 Exhibit 10.26 
 THE EXONE COMPANY 
  

 
 2013
EQUITY INCENTIVE PLAN 
 Notice of Stock Bonus Award 

Grant Number: 
 You have been granted shares of Common Stock of The ExOne Company (the “Company”) on the following terms: 
  

			
	Name of Participant:	  	
		
	Total Number of Shares Granted:	  	
		
	Fair Market Value per Share:	  	$TBD
		
	Total Fair Market Value of Award:    	  	$TBD
		
	Date of Grant:	  	
		
	Vesting Commencement Date:	  	N/A
		
	Vesting Schedule:	  	100% vested on the Grant Date

 You and the Company agree that these shares are granted under and governed by the terms and conditions of
The ExOne Company 2013 Equity Incentive Plan (the “Plan”) and the Stock Bonus Award Agreement, which is attached to and made a part of this document. 
 You also agree that the Company may deliver by email all documents relating to the Plan or this award (including, without limitation, prospectuses required by the Securities and Exchange Commission) and
all other documents that the Company is required to deliver to its security holders (including, without limitation, annual reports and proxy statements). You also agree that the Company may deliver these documents by posting them on a web site
maintained by the Company or by a third party under contract with the Company. If the Company posts these documents on a web site, it will notify you by email. 

  
 1 

									
	Participant:	 		 	The ExOne Company
				
	 	 		 	By:	 	 
	[Name]	 		 	  
 Title:
	 	 

  
 2 

 THE EXONE COMPANY

 2013 EQUITY INCENTIVE PLAN 

Stock Bonus Award Agreement 
  

			
	Defined Terms	  	Capitalized terms used and not otherwise defined herein have the definitions given to them in the Plan. If there is any conflict or inconsistency between the terms of this Stock
Bonus Award Agreement and the Plan, the terms of the Plan shall control.
		
	Payment for Shares	  	No payment is required for the shares that you are receiving.
		
	Stock Certificates	  	Your shares are being held as book entry shares by the Company’s transfer agent. You may request (at reasonable intervals) that the Company release to you a non-legended
certificate for your shares.
		
	Voting Rights	  	You may vote your shares.
		
	Withholding Taxes	  	No stock certificates will be released to you unless you have made acceptable arrangements to pay any withholding taxes that may be due as a result of this award or the vesting of
the shares. With the Company’s consent, these arrangements may include (a) withholding shares of Company stock that otherwise would be issued to you when they vest or (b) surrendering shares that you previously acquired. The fair market value
of the shares you surrender, determined as of the date when taxes otherwise would have been withheld in cash, will be applied as a credit against the withholding taxes. The Company urges you to seek the advice of your own tax consultants with
respect to the tax effects of this Award.
		
	Restrictions on Resale        	  	You agree not to sell any shares at a time when applicable laws, Company policies, or an agreement between the Company and its underwriters prohibit a sale. This restriction will
apply as long as your Service continues and for such period of time after the termination of your Service as the Company may specify.
		
	No Retention Rights	  	Your award or this Agreement does not give you the right to be employed or retained by the Company or a subsidiary of the Company in any capacity. The Company and its subsidiaries
reserve the right to terminate your Service at any time, with or without cause.
		
	Applicable Law	  	This Agreement will be interpreted and enforced under the laws of the State of Delaware, without regard to its choice-of-law
provisions.

  
 3 

			
		
	The Plan and Other Agreements	  	 The text of the Plan is incorporated in this Agreement by reference, and this Agreement is subject to the terms of the Plan.

 
 This Agreement and the Plan constitute the entire understanding between you and the
Company regarding this award. Any prior agreements, commitments or negotiations concerning this award are superseded. This Agreement may be amended only by another written agreement between the parties.

 By signing the cover sheet of this Agreement, you agree to all of the 

terms and conditions described above and in the Plan. 

  
 4

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