Document:

Warrant to Purchase Common Stock issued to Entrepreneurs Foundation

 Exhibit 4.6 
 Issue Date: November 30, 2005 
 THE SECURITIES REPRESENTED BY THIS INSTRUMENT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR QUALIFIED UNDER APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER SUCH ACT AND QUALIFIED UNDER
APPLICABLE STATE SECURITIES LAWS, OR UNLESS THE CORPORATION HAS RECEIVED AN OPINION OF COUNSEL OR OTHER EVIDENCE, REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL, THAT SUCH REGISTRATION OR QUALIFICATION IS NOT REQUIRED. 

WVR GROUP, INC. 
 STOCK PURCHASE WARRANT 
 THIS
CERTIFIES that the Entrepreneurs Foundation & Idea Network (the “Holder”) is entitled, upon the terms and subject to the conditions hereinafter set forth, at any time on or after the date of this Warrant and on or prior to
November 30, 2015 (the “Expiration Date”), to subscribe for and purchase, from WVR Group, Inc., a Delaware corporation (the “Company”), 8,750 of Common Stock (or other securities as to which purchase rights
under this Warrant exist) (the “Shares”) at an exercise price of $0.01 per share (the “Exercise Price”). The Exercise Price and the Shares purchasable hereunder are subject to adjustment as set forth in
Section 8. 
 1. Exercise of Warrant. 
 (a) The purchase rights represented by this Warrant are exercisable by the Holder, in whole or in part, at any time after the date hereof and before the close of business on the Expiration Date,
by the surrender of this Warrant and the Notice of Exercise annexed hereto duly executed at the principal executive office of the Company (or such other office or agency of the Company as it may designate by notice in writing to the Holder at the
address of the Holder appearing on the books of the Company), and upon payment of the Exercise Price of the Shares thereby purchased (by cash or by check or bank draft payable to the order of the Company); whereupon the Holder shall be entitled to
receive a certificate for the number of Shares so purchased. The Company agrees that if at the time of the surrender of this Warrant and purchase of the Shares, the Holder shall be entitled to exercise this Warrant, the Shares so purchased shall be
and be deemed to be issued to the Holder as the record owner of such Shares as of the close of business on the date on which this Warrant shall have been exercised as aforesaid. 

(b) In lieu of exercising this Warrant by payment of cash or check pursuant to subsection (a) above, the Holder may elect to receive
Shares equal to the value of this Warrant (or the portion thereof being exercised), at any time after the date hereof and before the close of business on the Expiration Date, by surrender of this Warrant at the principal executive office of the
Company, together with the Notice of Conversion annexed hereto, in which event the Company will issue to the Holder Shares in accordance with the following formula: 

									
		  	X	  	=	  	 Y(A-B)
	  	
		  	  	  	A	  	

  

									
		 	Where,	  	X	  	=	  	the number of Shares to be issued to Holder;
					
		 		  	Y	  	=	  	the number of Shares for which the Warrant is being exercised;
					
		 		  	A	  	=	  	the fair market value of one Share; and
					
		 		  	B	  	=	  	the Exercise Price (as adjusted to the date of such calculation).

 (i) For purposes of this subsection (b), the fair market value of a Share is defined as follows: 
 (1) if the exercise is in connection with an initial public offering of the Common Stock, and if the Company’s registration statement relating to such offering has been declared effective by the
Securities and Exchange Commission, then the fair market value shall be the initial “Price to Public” specified in the final prospectus with respect to the offering; 

(2) if the exercise is in connection with a Change of Control (as defined below), then the fair market value shall be the value received
in such Change of Control by the holders of the securities as to which purchase rights under this Warrant exist; 
 (3) if the
exercise occurs after, and not in connection with the Company’s initial public offering, and: 
 a) if traded on a
securities exchange or the Nasdaq Stock Market, the value shall be deemed to be the average of the closing prices of the securities on such exchange or market over the five (5) day period prior to the date of the Notice of Conversion; or

 b) if actively traded over-the-counter, the value shall be deemed to be the average of the closing bid prices over the five
(5) day period prior to the date of the Notice of Conversion; 
 (4) if there is no active public market, the value shall
be the fair market value thereof, as determined in good faith by the Company’s Board of Directors. 
 (ii) A
“Change of Control” shall mean (x) the acquisition of the Company by another entity by means of any transaction or series of related transactions (including, without limitation, any merger, consolidation or other form of
reorganization in which outstanding shares of the Company are exchanged for securities or other consideration issued, or caused to be issued, by the acquiring entity or its subsidiary, but excluding any transaction effected primarily for the purpose
of changing the Company’s jurisdiction of incorporation or raising capital for the Company), unless the Company’s stockholders of record as constituted immediately prior to such transaction or series

  
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of related transactions will, immediately after such transaction or series of related transactions hold at least a majority of the voting power of the surviving or acquiring entity or (y) a
sale of all or substantially all of the assets of the Company. 
 2. Nonassessable. The Company covenants that all Shares
which may be issued upon the exercise of rights represented by this Warrant will, upon exercise of the rights represented by this Warrant, be validly issued, fully paid and nonassessable and free from all taxes, liens and charges in respect of the
issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue). Certificates for Shares purchased hereunder shall be delivered to the Holder within a reasonable time after the date on which this Warrant shall
have been exercised as aforesaid. 
 3. No Fractional Shares or Scrip. No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Warrant. With respect to any fraction of a share called for upon the exercise of this Warrant, an amount equal to such fraction multiplied by the then current price at which each Share may
be purchased hereunder shall be paid in cash to the Holder. 
 4. Charges, Taxes and Expenses. Issuance of certificates
for Shares upon the exercise of this Warrant shall be made without charge to the Holder hereof for any issue or transfer tax or other incidental expense in respect of the issuance of such certificate, all of which taxes and expenses shall be paid by
the Company, and such certificates shall be issued in the name of the Holder. 
 5. No Rights as Stockholder. This
Warrant does not entitle the Holder to any voting rights or other rights as a stockholder of the Company prior to the exercise hereof. 
 6. Loss, Theft, Destruction or Mutilation of Warrant. On receipt of evidence satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and, in the case of loss,
theft or destruction, on delivery of an indemnity agreement satisfactory in form and substance to the Company or, in the case of mutilation, on surrender and cancellation of this Warrant, the Company at its expense shall execute and deliver, in lieu
of this Warrant, a new warrant of like tenor and amount. 
 7. Saturdays, Sundays, Holidays, etc. If the last or
appointed day for the taking of any action or the expiration of any right required or granted herein shall be a Saturday, a Sunday or a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a
Saturday, Sunday or legal holiday. 
 8. Adjustments. The Exercise Price and the number of Shares purchasable hereunder
are subject to adjustment from time to time as set forth in this Section 8. 
 (a) Reclassification, etc. If the
Company, at any time while this Warrant, or any portion hereof, remains outstanding and unexpired by reclassification of securities or otherwise, shall change any of the securities as to which purchase rights under this Warrant exist into the same
or a different number of securities or any other class or classes, this Warrant shall thereafter represent the right to acquire such number and kind of securities as would have been issuable as the result of such change with respect to the
securities that were subject to the purchase rights under this Warrant 

  
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immediately prior to such reclassification or other change and the Exercise Price therefor shall be appropriately adjusted, all subject to further adjustment as provided in this Section 8.

 (b) Subdivision or Combination of Shares. In the event that the Company shall at any time subdivide the outstanding
securities as to which purchase rights under this Warrant exist, or shall issue a stock dividend on the securities as to which purchase rights under this Warrant exist, the number of securities as to which purchase rights under this Warrant exist
immediately prior to such subdivision or to the issuance of such stock dividend shall be proportionately increased, and the Exercise Price shall be proportionately decreased, and in the event that the Company shall at any time combine the
outstanding securities as to which purchase rights under this Warrant exist, the number of securities as to which purchase rights under this Warrant exist immediately prior to such combination shall be proportionately decreased, and the Exercise
Price shall be proportionately increased, effective at the close of business on the date of such subdivision, stock dividend or combination, as the case may be. 
 (c) Cash Distributions. No adjustment on account of cash dividends or interest on the securities as to which purchase rights under this Warrant exist will be made to the Exercise Price under this
Warrant. 
 9. Restrictions on Transferability of Securities. 

(a) Restrictions on Transferability. This Warrant and the Shares issuable upon exercise of this Warrant (collectively the
“Securities”) shall not be sold, assigned, transferred or pledged except upon the conditions specified in this Section 9. 
 (b) Restrictive Legend. Each certificate representing the Securities and any other securities issued in respect of the Securities upon any stock split, stock dividend, recapitalization, merger,
consolidation or similar event, shall (unless otherwise permitted by the provisions of Section 9(c)) be stamped or otherwise imprinted with a legend in the following form (in addition to any legend required under applicable state securities
laws): 
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
OR QUALIFIED UNDER APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER SUCH ACT AND QUALIFIED UNDER APPLICABLE STATE SECURITIES LAWS, OR UNLESS THE CORPORATION HAS
RECEIVED AN OPINION OF COUNSEL OR OTHER EVIDENCE, REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL, THAT SUCH REGISTRATION OR QUALIFICATION IS NOT REQUIRED. 
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER, INCLUDING 

  
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A 180 DAY MARKET STANDOFF RESTRICTION, AS SET FORTH IN A STOCK PURCHASE WARRANT ISSUED BY THE CORPORATION TO THE ORIGINAL HOLDER OF THIS CERTIFICATE. SUCH RESTRICTIONS ARE BINDING ON TRANSFEREES
OF THIS CERTIFICATE. A COPY OF SUCH WARRANT MAY BE OBTAINED BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY OF THE CORPORATION AT THE PRINCIPAL EXECUTIVE OFFICES OF THE CORPORATION. 

Each holder of Securities and each subsequent transferee consents to the Company making a notation on its records and giving instructions
to any transfer agent of the Securities in order to implement the restrictions on transfer established in this Section 9. 

(c) Notice of Proposed Transfers. Each holder of a warrant or stock certificate, as the case may be, representing the Securities,
by acceptance thereof, agrees to comply in all respects with the provisions of this Section 9(c). Such holder agrees not to make any disposition of all or any portion of the Securities unless and until (X) there is then in effect a
registration statement under the Securities Act of 1933, as amended (the “Securities Act”) covering such proposed disposition and such disposition is made in accordance with such registration statement or (Y) such holder shall
have notified the Company of the proposed disposition and shall have furnished the Company with a detailed statement of the circumstances surrounding the proposed disposition, and if reasonably requested by the Company, such holder shall have
furnished the Company with an opinion of counsel, reasonably satisfactory to the Company that such disposition will not require registration of such shares under the Securities Act. 

10. Investment Representations and Covenants of the Holder. With respect to the acquisition of any of the Securities, the Holder
hereby represents and warrants to the Company as follows: 
 (a) Experience. The Holder is capable of evaluating the
merits and risks of its investment in the Company and has the capacity to protect its own interests. 
 (b) Investment.
The Holder is acquiring the Securities for investment for its own account, not as a nominee or agent, and not with the view to, or for resale in connection with, any distribution thereof. The Holder understands that the Securities have not been, and
will not be, registered under the Securities Act by reason of a specific exemption from the registration provisions of the Securities Act, the availability of which depends upon, among other things, the bona fide nature of the investment intent and
the accuracy of the Holder’s representations as expressed herein. 
 (c) Rule 144. The Holder acknowledges that the
Securities must be held indefinitely unless subsequently registered under the Securities Act, or unless an exemption from such registration is available. The Holder understands that the Company is not under any obligation to register any of the
Securities. The Holder is aware of the provisions of Rule 144 promulgated under the Securities Act that permit limited resale of securities purchased in a private placement subject to satisfaction of certain conditions. 

  
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 11. Market Standoff. The Holder hereby agrees that it will not, without the prior
written consent of the managing underwriter, during the period commencing on the date of the final prospectus relating to the Company’s initial public offering and ending on the date specified by the Company and the managing underwriter (such
period not to exceed one hundred eighty (l80) calendar days) (i) lend, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or
otherwise transfer or dispose of, directly or indirectly, any securities of the Company, including (without limitation) shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock (whether now owned or
hereafter acquired) or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any securities of the Company, including (without limitation) shares of Common
Stock or any securities convertible into or exercisable or exchangeable for Common Stock (whether now owned or hereafter acquired), whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of
securities, in cash or otherwise. The Holder agrees to execute an agreement(s) reflecting (i) and (ii) above as may be requested by the managing underwriters at the time of the initial public offering, and further agrees that the Company
may impose stop transfer instructions with its transfer agent in order to enforce the covenants in (i) and (ii) above. The underwriters in connection with the Company’s initial public offering are intended third party beneficiaries of
the covenants in this subsection and shall have the right, power and authority to enforce such covenants as though they were a party hereto. 
 12. Early Termination. The purchase rights represented by this Warrant shall terminate and be of no further force and effect after 5:00 p.m., United States Central Standard Time, on
November 30, 2015. 
 13. Notices. In the event (i) the Company shall take a record of the holders of the
securities at the time receivable upon the exercise of this Warrant for the purpose of entitling them to receive any dividend or other distribution, or any right to subscribe for or purchase any shares of stock of any class or any other securities,
or to receive any other right, (ii) of any capital reorganization of the Company, (iii) of any reclassification of the capital stock of the Company, (iv) of any Change of Control or (v) of any voluntary dissolution, liquidation
or winding-up of the Company, then, and in each such case, the Company will use commercially reasonable efforts to mail or cause to be mailed to the Holder a notice specifying, as the case may be, (A) the date on which a record is to be taken
for the purpose of such dividend, distribution or right, and stating the amount and character of such dividend, distribution or right, or (B) the date on which such reorganization, reclassification, Change of Control, dissolution, liquidation
or winding-up is to take place, and the time, if any is to be fixed, as of which the holders of the securities at the time receivable upon the exercise of this Warrant shall be entitled to exchange such securities for the securities or other
property deliverable upon such reorganization, reclassification, Change of Control, dissolution, liquidation or winding-up. The Company shall use commercially reasonable efforts to ensure such notice is mailed at least fifteen (15) days prior
to the date therein specified. 
 14. Miscellaneous. 

  
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 (a) Governing Law. THIS AGREEMENT SHALL BE GOVERNED IN ALL RESPECTS BY THE LAWS OF
THE STATE OF DELAWARE AS SUCH LAWS ARE APPLIED TO AGREEMENTS BETWEEN DELAWARE RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN DELAWARE, WITHOUT REGARD TO CONFLICT OF LAWS RULES. 

(b) Restrictions. By acceptance hereof, the Holder acknowledges that the Shares acquired upon the exercise of this Warrant may
have restrictions upon its resale imposed by state and federal securities laws. 
 (c) Waivers and Amendments. This
Warrant and any provisions hereof may be changed, waived, discharged or terminated only by an instrument in writing signed by the party against which enforcement of the same is sought. 

(d) Assignment; Assumption Upon Change of Control. 
 (i) This Warrant may be assigned or transferred by the Holder only with the prior written approval of the Company. This Warrant shall be binding upon any successors or assigns of the Company. 

(ii) If a Change of Control event shall occur, the Company shall ensure that appropriate provision shall be made with respect to the
rights and interests of the Holder of this Warrant to the end that the provisions hereof (including, without limitation, provisions for adjustments of the Exercise Price and of the number of shares purchasable and receivable upon the exercise of
this Warrant) shall thereafter be applicable, as nearly as may be possible, in relation to any shares of stock, securities or assets deliverable upon the exercise hereof. Upon any such Change of Control event, the successor corporation shall assume
by written instrument, executed and mailed or delivered to the registered Holder hereof at the last address of such Holder appearing on the books of the Company, the obligation to deliver to such Holder such shares of stock, securities or assets as,
in accordance with the foregoing provisions, such Holder may be entitled to purchase. 
 (e) Notices. All notices and
other communications required or permitted hereunder shall be in writing and shall be delivered personally by hand or by courier, mailed by United States first-class mail, postage prepaid, sent by facsimile or sent by electronic mail directed to the
party to be notified at the address, facsimile number or electronic mail address indicated for such person on the signature page hereof, or at such other address, facsimile number or electronic mail address as such party may designate by ten
(10) days’ advance written notice to the other parties hereto. All such notices and other communications shall be deemed given upon personal delivery, on the date of mailing, upon confirmation of facsimile transfer or when directed to the
electronic mail address set forth on signature page hereof. With respect to any notice given by the Company under any provision of the Delaware General Corporation Law or the Company’s charter or bylaws, the Holder agrees that such notice may
given by facsimile or by electronic mail. 
 (f) Counterparts. This Warrant may be executed in any number of
counterparts, each of which shall be enforceable, and all of which together shall constitute one instrument. 

  
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 IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer
thereunto duly authorized. 
  

			
	WVR GROUP, INC.
		
	By:	 	 /s/ Jerome L. Galant

		 	Jerome L. Galant, Chief Financial Officer
	
	Address:
	3801 Capital of Texas Highway South
	Suite 150
	Austin, Texas 78704
	Facsimile #: (512) 684-1101

  

			
	AGREED AND ACKNOWLEDGED:
	
	Entrepreneurs Foundation & Idea Network
		
	By:	 	 /s/ Eugene Sepulveda

		 	Eugene Sepulveda, Interim Executive Director
	
	Address
	PO Box 684826
	Austin, TX 78768
	
	Facsimile #: (512) 472-6044

  
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 NOTICE OF EXERCISE 

	TO:	WVR Group, Inc. 

 3801 Capital of
Texas Highway South 
 Suite 150 
 Austin, Texas 78704 
 ATTN: Secretary 

1. The undersigned hereby elects to purchase
                     shares of the Common Stock (the “Shares”) of WVR Group, Inc. pursuant to the terms of the attached
Warrant, and tenders herewith payment of the purchase price in full. 
 2. Please issue a certificate or certificates
representing the Shares in the name of the undersigned or in such other name as is specified below: 
  

							
		  	  
	  	
		  	(Print Name)	  	
				
		  	Address:	 	  
	  	
			
		  	  
	  	

 3. The undersigned confirms that the Shares are being acquired for the account of the undersigned for
investment only and not with a view to, or for resale in connection with, the distribution thereof and that the undersigned has no present intention of distributing or selling the Shares. 

 

					
	  
	 		 	  

	(Date)	 		 	(Signature)
			
		 		 	  

		 		 	(Print Name)

 NOTICE OF CONVERSION 

 

	TO:	WVR Group, Inc. 

 3801 Capital of
Texas Highway South 
 Suite 150 
 Austin, Texas 78704 
 ATTN: Secretary 

1. The undersigned hereby elects to convert the attached Warrant into
                     shares of the Common Stock (the “Shares”) of WVR Group, Inc. pursuant to Section 1(b) of such
Warrant, which conversion shall be effected pursuant to the terms of the attached Warrant. 
 2. Please issue a certificate or
certificates representing the Shares in the name of the undersigned or in such other name as is specified below: 
  

							
		  	  
	  	
		  	(Print Name)	  	
				
		  	Address:	 	  
	  	
			
		  	  
	  	

 3. The undersigned represents that the Shares are being acquired for the account of the
undersigned for investment and not with a view to, or for resale in connection with, the distribution thereof and that the undersigned has no present intention of distributing or reselling such shares. 

 

					
	  
	 		 	  

	(Date)	 		 	(Signature)
			
		 		 	  

		 		 	(Print Name)Warrant to Purchase Common Stock issued to Comerica (12-2-2005)

 Exhibit 4.7 
 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE
REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED. 

WARRANT TO PURCHASE STOCK 
  

			
	Corporation:	  	WVR GROUP, INC., a Delaware Corporation
	Number of Shares:	  	8,036
	Class of Stock:	  	Common Stock
	Initial Exercise Price:	  	$0.01 per share
	Issue Date:	  	December 2, 2005
	Expiration Date:	  	December 2, 2012 (Subject to Section 4.1)

 THIS WARRANT CERTIFIES THAT, for good and valuable consideration, the receipt of which is hereby acknowledged, COMERICA BANK or its assignee (“Holder”) is entitled to purchase the number of
fully paid and nonassessable shares of the class of securities (the “Shares”) of the corporation (the “Company”) at the initial exercise price per Share (the “Warrant Price”) all as set forth above and as adjusted
pursuant to Article 2 of this warrant, subject to the provisions and upon the terms and conditions set forth in this warrant. 
 ARTICLE 1. EXERCISE 
 1.1 Method of Exercise. Holder may exercise
this warrant by delivering this warrant and a duly executed Notice of Exercise in substantially the form attached as Appendix 1 to the principal office of the Company. Unless Holder is exercising the conversion right set forth in
Section 1.2, Holder shall also deliver to the Company a check for the aggregate Warrant Price for the Shares being purchased. 
 1.2 Conversion Right. In lieu of exercising this warrant as specified in Section 1.1, Holder may from time to time convert this warrant, in whole or in part, into a number of Shares determined
by dividing (a) the aggregate fair market value of the Shares or other securities otherwise issuable upon exercise of this warrant minus the aggregate Warrant Price of such Shares by (b) the fair market value of one Share. The fair market
value of the Shares shall be determined pursuant to Section 1.4. 
 1.3 Intentionally Omitted. 

1.4 Fair Market Value. If the Shares are traded regularly in a public market, the fair market value of the Shares shall be the
closing price of the Shares (or the closing price of the Company’s stock into which the Shares are convertible) reported for the business day immediately before Holder delivers its Notice of Exercise to the Company. If the Shares are not
regularly traded in a public market, the Board of Directors of the Company shall determine fair market value in its reasonable good faith judgment. 

 1.5 Delivery of Certificate and New Warrant. Promptly after Holder exercises or
converts this warrant, the Company shall deliver to Holder certificates for the Shares acquired and, if this warrant has not been fully exercised or converted and has not expired, a new warrant representing the Shares not so acquired. 

1.6 Replacement of Warrants. On receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or
mutilation of this warrant and, in the case of loss, theft or destruction, on delivery of an indemnity agreement reasonably satisfactory in form and amount to the Company or, in the case of mutilation, on surrender and cancellation of this warrant,
the Company at its expense shall execute and deliver, in lieu of this warrant, a new warrant of like tenor. 
 1.7
Repurchase on Sale, Merger, or Consolidation of the Company. 
 1.7.1 “Acquisition.” For the purpose of
this warrant, “Acquisition” means (a) any sale, license, or other disposition of all or substantially all of the assets (including intellectual property) of the Company, or (b) any reorganization, consolidation, merger or sale of
the voting securities of the Company or any other transaction where the holders of the Company’s securities before the transaction beneficially own less than 50% of the outstanding voting securities of the surviving entity after the
transaction. 
 1.7.2 Assumption of Warrant. If upon the closing of any Acquisition the successor entity assumes the
obligations of this warrant, then this warrant shall be exercisable for the same securities, cash, and property as would be payable for the Shares issuable upon exercise of the unexercised portion of this warrant as if such Shares were outstanding
on the record date for the Acquisition and subsequent closing. The Warrant Price shall be adjusted accordingly. The Company shall use reasonable efforts to cause the surviving corporation to assume the obligations of this warrant. 

1.7.3 Nonassumption. If upon the closing of any Acquisition the successor entity does not assume the
obligations of this warrant and Holder has not otherwise exercised this warrant in full, then Holder shall have the option either to (a) deem this warrant to have been automatically converted pursuant to Section 1.2 and thereafter Holder
shall participate in the Acquisition on the same terms as other holders of the same class of securities of the Company; or (b) require the Company to purchase this warrant for cash upon the closing of the Acquisition for an amount per Share
equal to one and one half (1  1/2) times
the Warrant Price. 
 ARTICLE 2. ADJUSTMENTS TO THE SHARES. 

2.1 Stock Dividends, Splits, Etc. If the Company declares or pays a dividend on its common stock payable in common stock, or
other securities, subdivides the outstanding common stock into a greater amount of common stock, then upon exercise of this warrant, for each Share acquired, Holder shall receive, without cost to Holder, the total number and kind of securities to
which Holder would have been entitled had Holder owned the Shares of record as of the date the dividend or subdivision occurred. 

  
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 2.2 Reclassification, Exchange or Substitution. Upon any reclassification, exchange,
substitution, or other event that results in a change of the number and/or class of the securities issuable upon exercise or conversion of this warrant, Holder shall be entitled to receive, upon exercise or conversion of this warrant, the number and
kind of securities and property that Holder would have received for the Shares if this warrant had been exercised immediately before such reclassification, exchange, substitution, or other event. Such an event shall include any automatic conversion
of the outstanding or issuable securities of the Company of the same class or series as the Shares to common stock pursuant to the terms of the Company’s Certificate of Incorporation upon the closing of a registered public offering of the
Company’s common stock. The Company or its successor shall promptly issue to Holder a new warrant for such new securities or other property. The new warrant shall provide for adjustments which shall be as nearly equivalent as may be practicable
to the adjustments provided for in this Article 2 including, without limitation, adjustments to the Warrant Price and to the number of securities or property issuable upon exercise of the new warrant. The provisions of this Section 2.2
shall similarly apply to successive reclassifications, exchanges, substitutions, or other events. 
 2.3 Adjustments for
Combinations, Etc. If the outstanding Shares are combined or consolidated, by reclassification or otherwise, into a lesser number of shares, the Warrant Price shall be proportionately increased. If the outstanding Shares are combined or
consolidated, by reclassification or otherwise, into a greater number of shares, the Warrant Price shall be proportionately decreased. 
 2.4 Adjustments for Diluting Issuances. The Warrant Price and the number of Shares issuable upon exercise of this warrant shall be subject to adjustment, from time to time, in the manner set forth
on Exhibit A, if attached, in the event of Diluting Issuances (as defined on Exhibit A). 
 2.5 No
Impairment. The Company shall not, by amendment of its Certificate of Incorporation or through a reorganization, transfer of assets, consolidation, merger, dissolution, issue, or sale of securities or any other voluntary action, avoid or seek to
avoid the observance or performance of any of the terms to be observed or performed under this warrant by the Company, but shall at all times in good faith assist in carrying out all the provisions of this Article 2 and in taking all such
action as may be necessary or appropriate to protect Holder’s rights under this Article against impairment. 
 2.6
Certificate as to Adjustments. Upon each adjustment of the Warrant Price, the Company at its expense shall promptly compute such adjustment, and furnish Holder with a certificate of its Chief Financial Officer setting forth such adjustment
and the facts upon which such adjustment is based. The Company shall, upon written request, furnish Holder a certificate setting forth the Warrant Price in effect upon the date thereof and the series of adjustments leading to such Warrant Price.

 2.7 Fractional Shares. No fractional Shares shall be issuable upon exercise or conversion of the Warrant and the
Number of Shares to be issued shall be rounded down to the nearest whole Share. If a fractional share interest arises upon any exercise or conversion of 

  
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the Warrant, the Company shall eliminate such fractional share interest by paying Holder amount computed by multiplying the fractional interest by the fair market value of a full Share.

 ARTICLE 3. REPRESENTATIONS AND COVENANTS OF THE COMPANY. 

3.1 Representations and Warranties. The Company hereby represents and warrants to the Holder as follows: 

(a) The initial Warrant Price referenced on the first page of this warrant is not greater than the fair market value of the Shares as of
the date of this warrant. 
 (b) All Shares which may be issued upon the exercise of the purchase right represented by this
warrant, and all securities, if any, issuable upon conversion of the Shares, shall, upon issuance, be duly authorized, validly issued, fully paid and nonassessable, and free of any liens and encumbrances except for restrictions on transfer provided
for herein or under applicable federal and state securities laws. 
 (c) The Company’s capitalization table attached to
this warrant is true and complete as of the Issue Date. 
 3.2 Notice of Certain Events. If the Company proposes at any
time (a) to declare any dividend or distribution upon its common stock, whether in cash, property, stock, or other securities and whether or not a regular cash dividend; (b) to offer for subscription pro rata to the holders of any class or
series of its stock any additional shares of stock of any class or series or other rights; (c) to effect any reclassification or recapitalization of common stock; or (d) to merge or consolidate with or into any other corporation, or sell,
lease, license, or convey all or substantially all of its assets, or to liquidate, dissolve or wind up, then, in connection with each such event, the Company shall give Holder (1) at least 20 days prior written notice of the date on which a
record will be taken for such dividend, distribution, or subscription rights (and specifying the date on which the holders of common stock will be entitled thereto) or for determining rights to vote, if any, in respect of the matters referred to in
(a) and (b) above; and (2) in the case of the matters referred to in (c) and (d) above at least 20 days prior written notice of the date when the same will take place (and specifying the date on which the holders of common
stock will be entitled to exchange their common stock for securities or other property deliverable upon the occurrence of such event). 
 3.3 Information Rights. So long as the Holder holds this warrant and/or any of the Shares, the Company shall deliver to the Holder (a) promptly after mailing, copies of all communiques to the
shareholders of the Company, (b) within ninety (90) days after the end of each fiscal year of the Company, the annual audited financial statements of the Company certified by independent public accountants of recognized standing and
(c) within forty-five (45) days after the end of each of the first three quarters of each fiscal year, the Company’s quarterly, unaudited financial statements. 
 3.4 Registration Under Securities Act of 1933, as amended. The Company agrees that the Shares or, if the Shares are convertible into common stock of the Company, such common stock, shall be subject
to the registration rights set forth on Exhibit B. 

  
 -4-

 ARTICLE 4. REPRESENTATIONS, WARRANTIES AND COVENANTS OF HOLDER. 

With respect to the issuance of this Warrant and the acquisition of any of the Shares, Holder hereby represents and warrants to the
Company as follows: 
 4.1 Purchase Entirely for Own Account. This Warrant is granted to Holder in reliance upon
Holder’s representation to the Company that the Shares will be acquired for investment for Holder’s own account, not as a nominee or agent, and not with a view to the resale or distribution of any part thereof, and that Holder has no
present intention of selling, granting any participation in, or otherwise distributing the same. Holder further represents that Holder does not have any contract, undertaking, agreement or arrangement with any person to sell, transfer or grant
participations to such person or to any third person with respect to any of the Shares. 
 4.2 Reliance upon Holder’s
Representations. Holder understands that the Shares are not registered under the Securities Act of 1933, as amended (the “Securities Act”), on the ground that the issuance of the Shares hereunder is exempt from registration under the
Securities Act pursuant to Section 4(2) thereof, and that the Company’s reliance on such exemption is predicated on Holder’s representations set forth herein. 
 4.3 Investment Experience; Economic Risk. Holder understands that the Company has a limited financial and operating history and that holding the warrant involves substantial risks. Holder is
experienced in making loans to and holding warrants in companies in a similar stage of development to that of the Company and acknowledges that Holder is able to fend for itself. Holder has such knowledge and experience in financial and business
matters that Holder is capable of evaluating the merits and risks of holding this Warrant or the Shares. 
 4.4 Accredited
Investor Status. Holder is an “accredited investor” within the meaning of Regulation D, Rule 501 (a), promulgated under the Securities Act. 
 4.5 Restricted Securities. Holder understands that the Shares are characterized as “restricted securities” under the federal securities laws inasmuch as they are being acquired from the
Company in a transaction not involving a public offering and that under such federal securities laws and applicable regulations such Shares may be resold without registration under the Securities Act only in certain limited circumstances.

 4.6 Market Stand-Off Agreement. Holder hereby agrees that, during the period of duration specified by the Company and
an underwriter of common stock or other securities of the Company (such period not to exceed one hundred eighty (180) calendar days), following the effective date of a registration statement of the Company filed under the Act, it shall not, to
the extent requested by the Company and such underwriter, directly or indirectly sell, offer to sell, contract to sell (including, without limitation, any short sale), grant any option to purchase or otherwise transfer or dispose of any securities
of the Company held by it at any time during such period except common stock included in such registration. The foregoing covenants shall apply only to the Company’s initial public offering of equity securities, shall not apply to the sale of
any shares by Holder to an underwriter pursuant to an underwriting agreement and shall only be applicable to Holder if all the Company’s executive officers, directors and stockholders holding at least five

  
 -5-

 
percent (5%) of the Company’s voting securities enter into similar agreements. In order to enforce the foregoing covenant, the Company may impose stop-transfer instructions with respect
to the securities of Holder (and the shares or securities of every other person subject to the foregoing restriction) until the end of such period. 
 ARTICLE 5. MISCELLANEOUS. 
 5.1 Term: Notice of Expiration. This
warrant is exercisable in whole or in part, at any time and from time to time on or before the Expiration Date set forth above; provided, however, that if the Company completes its initial public offering within the three-year period
immediately prior to the Expiration Date, the Expiration Date shall automatically be extended until the third anniversary of the effective date of the Company’s initial public offering. If this warrant has not been exercised prior to the
Expiration Date, this warrant shall be deemed to have been automatically exercised on the Expiration Date by “cashless” conversion pursuant to Section 1.2. 
 5.2 Legends. This warrant and the Shares (and the securities issuable, directly or indirectly, upon conversion of the Shares, if any) shall be imprinted with a legend in substantially the following
form: 
 THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR
OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED. 

THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE SUBJECT TO A LOCKUP PERIOD OF UP TO 180 DAYS FOLLOWING THE EFFECTIVE DATE OF A
REGISTRATION STATEMENT OF THE COMPANY FILED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AS SET FORTH IN THAT CERTAIN WARRANT BETWEEN THE CORPORATION AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE CORPORATION’S
PRINCIPAL OFFICE. SUCH LOCK-UP PERIOD IS BINDING ON TRANSFEREES OF THESE SHARES. 
 5.3 Compliance with Securities Laws on
Transfer. This warrant and the Shares issuable upon exercise of this warrant (and the securities issuable, directly or indirectly, upon conversion of the Shares, if any) may not be transferred or assigned in whole or in part without compliance
with applicable federal and state securities laws by the transferor and the transferee (including, without limitation, the delivery of investment representation letters and legal opinions reasonably satisfactory to the Company). The Company shall
not require Holder to provide an opinion of counsel if the transfer is to an affiliate of Holder or if there is no material question as to the availability of current information as referenced in Rule 144(c), Holder represents that it has
complied with Rule 144(d) and (e) in reasonable detail, the selling broker represents that it has complied with Rule 144(f), and the Company is provided with a copy of Holder’s notice of proposed sale. 

  
 -6-

 5.4 Transfer Procedure. Subject to the provisions of Section 4.3, Holder may
transfer all or part of this warrant or the Shares issuable upon exercise of this warrant (or the securities issuable, directly or indirectly, upon conversion of the Shares, if any) by giving the Company notice of the portion of the warrant being
transferred setting forth the name, address and taxpayer identification number of the transferee and surrendering this warrant to the Company for reissuance to the transferee(s) (and Holder, if applicable); provided, however, that Holder may
transfer all or part of this warrant to its affiliates, including, without limitation, Comerica Incorporated, at any time without notice to the Company, and such affiliate shall then be entitled to all the rights of Holder under this warrant and any
related agreements, and the Company shall cooperate fully in ensuring that any stock issued upon exercise of this warrant is issued in the name of the affiliate that exercises the warrant. The terms and conditions of this warrant shall inure to the
benefit of, and be binding upon, the Company and the holders hereof and their respective permitted successors and assigns. Unless the Company is filing financial information with the SEC pursuant to the Securities Exchange Act of 1934, the Company
shall have the right to refuse to transfer any portion of this warrant to any person who directly competes with the Company. 

5.5 Notices. All notices and other communications from the Company to the Holder, or vice versa, shall be deemed delivered and
effective when given personally or mailed by first-class registered or certified mail, postage prepaid, at such address as may have been furnished to the Company or the Holder, as the case may be, in writing by the Company or such Holder from time
to time. All notices to the Holder shall be addressed as follows: 
 Comerica Bank 

Attn: Warrant Administrator 
 500 Woodward Avenue, 32nd Floor, MC 3379 
 Detroit, MI 48226 

5.6 Amendments. This warrant and any term hereof may be changed, waived, discharged or terminated only by an instrument in
writing signed by the party against which enforcement of such change, waiver, discharge or termination is sought. 
 5.7
Attorneys’ Fees. In the event of any dispute between the parties concerning the terms and provisions of this warrant, the party prevailing in such dispute shall he entitled to collect from the other party all costs incurred in such
dispute, including reasonable attorneys’ fees. 

  
 -7-

 5.8 Governing Law. This warrant shall he governed by and construed in accordance
with the laws of the State of California, without giving effect to its principles regarding conflicts of law. 
  

			
	WVR GROUP, INC.
		
	By:	 	 /s/ Jerome L. Galant

		
	Name:	 	 Jerome L. Galant

		
	Title:	 	 Chief Financial Officer

	
	COMERICA BANK
		
	By:	 	 /s/ Paul Gerling

		
	Name:	 	 Paul Gerling

		
	Title:	 	 Senior Vice President

Authorized signatories under Corporate Resolutions to Borrow or an authorized signer(s) under a resolution Covering warrants must sign the warrant.

  
 -8-

 APPENDIX 1 

NOTICE OF EXERCISE 
 1. The undersigned hereby elects to purchase shares of the stock of WVR GROUP, INC. pursuant to the terms of the attached warrant, and tenders herewith payment of the purchase price of such shares in
full. 
 2. The undersigned hereby elects to convert the attached warrant into shares in the manner specified in the warrant.
This conversion is exercised with respect to of the shares covered by the warrant. 
 [Strike paragraph that does not apply.]

 3. Please issue a certificate or certificates representing said shares in the name of the undersigned or in such other
name as is specified below: 
 Comerica Bank 
 Attn: Warrant Administrator 
 500 Woodward Avenue, 32nd Floor, MC 3379 

Detroit, MI 48226 
 4. The undersigned represents it is acquiring the shares solely for its own account and not as a nominee for any other party and not with a view toward the resale or distribution thereof except in
compliance with applicable securities laws. 
  

	
	COMERICA BANK or Registered Assignee
	
	  

	(Signature)
	
	  

	(Date)

 EXHIBIT A 

COMERICA BANK 
 ANTI-DILUTION AGREEMENT 
 (for Common Stock Warrants) 

This Anti-dilution Agreement is entered into as of September 23, 2005, by and between Comerica Bank (“Purchaser”) and WVR
Group, Inc. (“the Company”). 
 RECITALS 
 A. Concurrently with the execution of this Anti-dilution Agreement, the Purchaser is purchasing from the Company a Warrant to Purchase Stock (the “Warrant”) pursuant to which Purchaser has the
right to acquire from the Company the Shares (as defined in the Warrant). 
 B. By this Anti-dilution Agreement, the Purchaser
and the Company desire to set forth the adjustment in the number of Shares issuable upon exercise of the Warrant as a result of a Diluting Issuance (as defined below). 
 C. Capitalized terms used herein shall have the same meaning as set forth in the Warrant. 
 NOW, THEREFORE, in consideration of the mutual promises, covenants and conditions hereinafter set forth, the parties hereto mutually agree as follows: 

1. Definitions. As used in this Anti-dilution Agreement, the following terms have the following respective meanings: 

(a) “Option” means any right, option or warrant to subscribe for, purchase or otherwise acquire common stock or Convertible
Securities. 
 (b) “Convertible Securities” means any evidences of indebtedness, shares of stock or other securities
directly or indirectly convertible into or exchangeable for common stock. 
 (c) “Issue” means to grant, issue, sell,
assume or fix a record date for determining persons entitled to receive any security (including Options), whichever of the foregoing is the first to occur. 
 (d) “Additional Common Shares” means all common stock (including reissued shares) Issued (or deemed to be issued pursuant to Section 2) after the date of the Warrant 

(i) other than shares of common stock issued (or deemed to be issued pursuant to Section 2 hereof) in a transaction described in
Sections 2.1 and 2.2 of the Warrant; 
 (ii) shares of common stock issued upon conversion of preferred stock outstanding
on the date of the Warrant; 

  
 A-1

 (iii) shares of Common Stock issued (or deemed to be issued pursuant to Section 2) as
an incentive to the Company’s employees, officers, directors, consultants, advisors or services providers pursuant to any stock purchase plan, agreement or similar arrangement approved by the Company’s Board of Directors; 

(iv) shares of Common Stock issued (or deemed to have been issued pursuant to Section 2) to banks or equipment lessors, provided
such issuance is approved by the Company’s Board of Directors; 
 (v) shares of Common Stock issued (or deemed to have
been issued pursuant to Section 2) in connection with sponsored research, collaboration, technology license, development, OEM, marketing or other similar agreements or strategic partnerships, provided such issuance is approved by the
Company’s Board of Directors; or 
 (vi) shares of Common Stock issued in a firm commitment underwritten public offering
pursuant to an effective registration statement under the Securities Act; 
 2. Deemed Issuance of Additional Common
Shares. The shares of common stock ultimately Issuable upon exercise of an Option (including the shares of common stock ultimately Issuable upon conversion or exercise of a Convertible Security Issuable pursuant to an Option) are deemed to be
Issued when the Option is Issued. The shares of common stock ultimately Issuable upon conversion or exercise of a Convertible Security (other than a Convertible Security Issued pursuant to an Option) shall be deemed Issued upon Issuance of the
Convertible Security. The maximum amount of common stock Issuable is determined without regard to any future adjustments permitted under the instrument creating the Options or Convertible Securities. 

3. Adjustment of Warrant Price for Diluting Issuances. 
 3.1 Weighted Average Adjustment. If the Company issues Additional Common Shares after the date of the Warrant and the consideration per Additional Common Share (determined pursuant to
Section 9) is less than the Warrant Price in effect immediately before such Issue (a “Diluting Issuance”), the Warrant Price in effect immediately before such Issuance of Additional Common Shares shall be reduced, concurrently with
such Issuance, to a price (calculated to the nearest hundredth of a cent) determined by multiplying the Warrant Price by a fraction: 
 (a) the numerator of which is the amount of common stock outstanding immediately before such Issuance of Additional Common Shares plus the amount of common stock that the aggregate consideration received
by Company for the Additional Common Shares would purchase at the Warrant Price in effect immediately before such Issuance of Additional Common Shares, and 
 (b) the denominator of which is the amount of common stock outstanding immediately before such Issue plus the number of such Additional Common Shares. 

3.2 Adjustment of Number of Shares. Upon each adjustment of the Warrant Price, the number of Shares Issuable upon exercise of the
Warrant shall be increased to equal the quotient obtained by dividing (a) the product resulting from multiplying (i) the number of Shares 

  
 A-2

 
Issuable upon exercise of the Warrant and (ii) the Warrant Price, in each case as in effect immediately before such adjustment, by (b) the adjusted Warrant Price. 

3.3 Securities Deemed Outstanding. For the purpose of this Section 3, all securities Issuable upon exercise of any
outstanding Convertible Securities or Options, Warrants, or other rights to acquire securities of the Company shall be deemed to be outstanding. 
 4. No Adjustment for Issuances Following Deemed Issuances. No adjustment to the Warrant Price shall be made upon the exercise of Options or conversion of Convertible Securities. 

5. Adjustment Following Changes in Terms of Options or Convertible Securities. If the consideration payable to, or the amount of
common stock Issuable by, the Company increases or decreases, respectively, pursuant to the terms of any outstanding Options or Convertible Securities (unless such Options or Convertible Securities were merely deemed to be included in the numerator
and denominator for purposes of Section 3.3), the Warrant Price shall be recomputed to reflect such increase or decrease. The recomputation shall be made as of the time of the Issuance of the Options or Convertible Securities. Any changes in
the Warrant Price that occurred after such Issuance because other Additional Common Shares were Issued or deemed Issued shall also be recomputed. 
 6. Recomputation Upon Expiration of Options or Convertible Securities. The Warrant Price computed upon the original Issue of any Options or Convertible Securities, and any subsequent adjustments
based thereon, shall be recomputed when any Options or rights of conversion under Convertible Securities expire without having been exercised (unless such Options or Convertible Securities were merely deemed to be included in the numerator and
denominator for purposes of Section 3.3). In the case of Convertible Securities or Options for common stock, the Warrant Price shall be recomputed as if the only Additional Common Shares Issued were the shares of common stock actually Issued
upon the exercise of such securities, if any, and as if the only consideration received therefor was the consideration actually received upon the Issue, exercise or conversion of the Options or Convertible Securities. In the case of Options for
Convertible Securities, the Warrant Price shall be recomputed as if the only Convertible Securities Issued were the Convertible Securities actually Issued upon the exercise thereof, if any, and as if the only consideration received therefor was the
consideration actually received by the Company (determined pursuant to Section 9), if any, upon the Issue of the Options for the Convertible Securities. 
 7. Limit on Readjustments. No readjustment of the Warrant Price pursuant to Sections 5 or 6 shall increase the Warrant Price more than the amount of any decrease made in respect of the Issue
of any Options or Convertible Securities. 
 8. 30 Day Options. In the case of any Options that expire by their terms not
more than 30 days after the date of Issue thereof, no adjustment of the Warrant Price shall be made until the expiration or exercise of all such Options. 
 9. Computation of Consideration. The consideration received by the Company for the Issue of any Additional Common Shares shall be computed as follows: 

  
 A-3

 (a) Cash shall be valued at the amount of cash received by the Corporation, excluding
amounts paid or payable for accrued interest or accrued dividends. 
 (b) Property. Property, other than cash, shall be
computed at the fair market value thereof at the time of the Issue as determined in good faith by the Board of Directors of the Company. 
 (c) Mixed Consideration. The consideration for Additional Common Shares Issued together with other property of the Company for consideration that covers both shall be determined in good faith by
the Board of Directors. 
 (d) Options and Convertible Securities. The consideration per Additional Common Share for
Options and Convertible Securities shall be determined by dividing: 
 (i) the total amount, if any, received or receivable by
the Company for the Issue of the Options or Convertible Securities, plus the minimum amount of additional consideration (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment
of such consideration) payable to the Company upon exercise of the Options or conversion of the Convertible Securities, by 

(ii) the maximum amount of common stock (as set forth in the instruments relating thereto, without regard to any provision contained
therein for a subsequent adjustment of such number) ultimately Issuable upon the exercise of such Options or the conversion of such Convertible Securities. 
 10. General. 
 10.1 Governing Law. This Anti-dilution Agreement
shall be governed in all respects by the laws of the State of California as such laws are applied to agreements between California residents entered into and to be performed entirely within California. 

10.2 Successors and Assigns. Except as otherwise expressly provided herein, the provisions hereof shall inure to the benefit of,
and be binding upon, the successors, assigns, heirs, executors and administrators of the parties hereto. 
 10.3 Entire
Agreement. Except as set forth below, this Anti-dilution Agreement and the other documents delivered pursuant hereto constitute the full and entire understanding and agreement between the parties with regard to the subjects hereof and thereof.

 10.4 Notices, etc. All notices and other communications required or permitted hereunder shall be in writing and shall
be mailed by first class mail, postage prepaid, certified or registered mail, return receipt requested, addressed (a) if to Purchaser at Purchaser’s address as set forth below, or at such other address as Purchaser shall have furnished to
the Company in writing, or (b) if to the Company, at the Company’s address set forth below, or at such other address as the Company shall have furnished to the Purchaser in writing. 

  
 A-4

 10.5 Severability. In case any provision of this Anti-dilution Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions of this Anti-dilution Agreement shall not in any way be affected or impaired thereby. 

10.6 Titles and Subtitles. The titles of the sections and subsections of this Agreement are for convenience of reference only and
arc not to be considered in construing this Anti-dilution Agreement. 
 10.7 Counterparts. This Anti-dilution Agreement
may be executed in any number of counterparts, each of which shall. be an original, but all of which together shall constitute one instrument: 
  

									
	PURCHASER	 		 	ISSUER
			
	COMERICA BANK	 		 	WVR GROUP, INC.
					
	By:	 	  
	 		 	By:	 	 /s/ Jerome L. Galant

				
	Name:	 		 	Name:	 	Jerome L. Galant
				
	Title:	 		 	Title:	 	Chief Financial Officer
			
	Address:	 		 	Address:
				
		 		 		 	 3801 S. Capital of Texas Highway, Suite 150
 Austin, TX 78704

  
 A-5

 EXHIBIT B 

Registration Rights 
 The Shares (if common stock), or the common stock issuable upon conversion of the Shares, shall be deemed “registrable securities” or otherwise entitled to “piggy back” registration
rights in accordance with the terms of the following agreement (the “Agreement”) between the Company and its investor(s): 
 Investors’ Rights Agreement dated February 1, 2005, by and among the Company and the Investors set forth therein 
 The Company agrees that no amendments will be made to the Agreement, which would have an adverse impact on Holder’s registration rights thereunder without the consent of Holder, unless such amendment
affects all other parties to the Agreement in the same manner. By acceptance of the Warrant to which this Exhibit B is attached, Holder shall be deemed to be a party to the Agreement and shall be subject to all of the restrictions set forth
therein.

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