Document:

EX-4.5

 Exhibit 4.5 

SILVERBACK ENTERPRISE GROUP, INC. 

MARKET STANDOFF AGREEMENT 

In connection with, and as consideration for, my receipt of shares of common stock (the “Common Stock”) or preferred
stock (the “Preferred Stock”) of Silverback Enterprise Group, Inc. (the “Company”) from the Company on November 7, 2013, I, the undersigned, agree and represent as follows: 

I hereby agree that I shall not sell or otherwise transfer, make any short sale of, grant any option for the purchase of, or enter into any
hedging or similar transaction with the same economic effect as a sale, of any Preferred Stock, Common Stock (or other securities) of the Company held by me or otherwise in my possession during the one hundred and eighty (180) day period
following the effective date of the registration statement relating to the closing of the Company’s first firm commitment underwritten public offering of the Company’s Common Stock registered under the Securities Act of 1933 (or such other
period as may be requested by the Company or an underwriter to accommodate regulatory restrictions on (i) the publication or other distribution of research reports and (ii) analyst recommendations and opinions, including, but not limited
to, the restrictions contained in NASD Rule 2711(f)(4) or NYSE Rule 472(f)(4), or any successor provisions or amendments thereto). The obligations described in this Market Standoff Agreement shall not apply to a registration relating
solely to employee benefit plans on Form S-l or Form S-8 or similar forms that may be promulgated in the future, or a registration relating solely to a transaction on Form S-4 or similar forms that may be promulgated in the future. The Company may
impose stop-transfer instructions and may stamp each such certificate with restrictive legends with respect to the shares of Common Stock (or other securities) subject to the foregoing restriction until the end of such one hundred and eighty
(180) day (or other) period. I further agree to execute a market standoff agreement with said underwriters in customary form consistent with the provisions of this Market Standoff Agreement. 

[Signature page follows.] 

 I hereby sign this Market Standoff Agreement as of the date first set forth above. 

 

			
	/s/ ROBERT SVEC
	Robert Svec
	
	  11/6/13
		 	(date)EX-4.6

 Exhibit 4.6 

MANAGEMENT RIGHTS AGREEMENT 

THIS MANAGEMENT RIGHTS AGREEMENT (this “Agreement”) is entered into as of October 28, 2010 by and between
Silverback Acquisition Corporation, a Delaware corporation (the “Company”), and Austin Ventures IX, L.P., a Delaware limited partnership (the “Fund”) (together, the “Parties”).

 RECITALS 

WHEREAS, the Fund is seeking to satisfy certain requirements to qualify, or to maintain its qualification, as a “venture capital
operating company” within the meaning of Department of Labor Regulation Section 2510.3-101(d) (the “Regulation”); 

WHEREAS, the Regulation generally requires that a venture capital operating company have direct contractual rights to substantially
participate in, or substantially influence the conduct of, the management of its portfolio companies; and 
 WHEREAS, in order to
induce the Fund to invest in the Company, the Company has agreed to provide such rights to the Fund. 
 NOW, THEREFORE, the Parties,
intending to be legally bound, hereby agree as follows. 
 1. Grant of Management Rights. From and after the Fund’s
purchase of shares of Series A Preferred Stock of the Company (including any shares of Common Stock issued upon conversion thereof, the “Securities”), the Fund shall have the following contractual management rights. Such
rights shall be in addition to, and nothing in this Agreement shall be deemed to limit, any other rights that the Fund may hold as a holder of the Securities or otherwise. 

(a) The Fund shall be entitled to consult with and advise management of the Company on significant business issues, including without
limitation management’s proposed quarterly and annual operating plans. Upon request by the Fund, management of the Company shall meet with authorized representatives of the Fund, at a mutually agreeable time and place, within thirty days after
the end of each calendar quarter for such consultation and advice and to review progress in achieving such plans. 
 (b) The Fund shall be
entitled to examine the books and records of the Company, inspect its facilities, and receive other information at reasonable times and intervals concerning the general status of the Company’s financial condition and operations. 

(c) For any period during which an authorized representative of the Fund is not a member of the Company’s Board of Directors, the Company
shall invite the Fund’s authorized representative to attend all meetings of the Board and in connection therewith shall provide to such representative copies of all notices, minutes, consents, and other materials that it provides to its
directors. Such representative may participate in discussions of matters brought before the Board, but shall in all other respects be a nonvoting observer. 

2. Limitation on Management Rights. The Company shall not be required under this Agreement to provide access to attorney-client
privileged communications or other information of an extremely sensitive nature the disclosure of which to the Fund would be materially detrimental to the Company. The Company acknowledges and agrees that the preceding sentence is not intended to
prevent the Fund from obtaining information necessary for the Fund to substantially participate in, or substantially influence the conduct of, management of the Company within the meaning of the Regulation. 

 3. Termination of Management Rights. The management rights granted in paragraph 1
above shall terminate upon the earlier of: (i) consummation of a sale of the Company’s securities pursuant to a registration statement filed by the Company under the Securities Act of 1933 in connection with a firm commitment underwritten
offering of the Company’s securities to the general public; (ii) any transaction (including, without limitation, a merger, acquisition or reorganization of the Company) pursuant to which the Fund exchanges 100% of the Securities for cash
and/or securities that are, have become, or will within 12 months become freely tradable on a United States domestic, national securities exchange; (iii) distribution by the Fund to its constituent partners of 100% of the Securities; or
(iv) any other transaction pursuant to which the Fund disposes of 100% of the Securities exclusively for cash and/or other consideration that does not include debt or equity securities or instruments. 

4. Confidentiality. Except as otherwise required by applicable law, the Fund and any authorized representative acting on behalf
of the Fund pursuant to this Agreement shall maintain the confidentiality of all proprietary Company information acquired pursuant to this Agreement and shall not disclose or use such information other than for a Company purpose or with the
Company’s consent. 
 5. Restructuring. Subject to paragraph 3, above, if the Company engages in a restructuring or
similar transaction, any resulting entity or entities shall be subject to this Agreement in the same manner as the Company. 
 6.
Counterparts. This Agreement may be executed in any number of counterparts and, when so executed, all of such counterparts shall constitute a single instrument binding upon all Parties notwithstanding the fact that all Parties are not
signatory to the original or to the same counterpart. 
 [Remainder of this page intentionally left blank; signature page follows.]

 IN WITNESS WHEREOF the Parties have executed this Management Rights Agreement as of the date
first above written. 
  

			
	SILVERBACK ACQUISITION CORPORATION
	a Delaware corporation
		
	By:	 	/s/ JOHN T. MCDONALD
		 	John T. McDonald,
		 	Chief Executive Officer

  

  
 [SIGNATURE
PAGE TO MANAGEMENT RIGHTS AGREEMENT] 

 IN WITNESS WHEREOF the Parties have executed this Management Rights Agreement as of the date
first above written. 
  

			
	AUSTIN VENTURES IX, L.P.
	
	By: AV Partners IX, L.P., its general partner
	By: AV Partners IX, L.L.C., its general partner
		
	By: 	 	/s/ PHILIP SIEGEL
	Name:	 	Philip Siegel
	Title: 	 	General Partner

  

  
 [SIGNATURE
PAGE TO MANAGEMENT RIGHTS AGREEMENT]EX-4.7

 Exhibit 4.7 

MANAGEMENT RIGHTS AGREEMENT 

THIS MANAGEMENT RIGHTS AGREEMENT (this “Agreement”) is entered into as of October 28, 2010 by and between
Silverback Acquisition Corporation, a Delaware corporation (the “Company”), and Austin Ventures X, L.P., a Delaware limited partnership (the “Fund”) (together, the “Parties”).

 RECITALS 

WHEREAS, the Fund is seeking to satisfy certain requirements to qualify, or to maintain its qualification, as a “venture capital
operating company” within the meaning of Department of Labor Regulation Section 2510.3-101(d) (the “Regulation”); 

WHEREAS, the Regulation generally requires that a venture capital operating company have direct contractual rights to substantially
participate in, or substantially influence the conduct of, the management of its portfolio companies; and 
 WHEREAS, in order to
induce the Fund to invest in the Company, the Company has agreed to provide such rights to the Fund. 
 NOW, THEREFORE, the Parties,
intending to be legally bound, hereby agree as follows. 
 1. Grant of Management Rights. From and after the Fund’s
purchase of shares of Series A Preferred Stock of the Company (including any shares of Common Stock issued upon conversion thereof, the “Securities”), the Fund shall have the following contractual management rights. Such
rights shall be in addition to, and nothing in this Agreement shall be deemed to limit, any other rights that the Fund may hold as a holder of the Securities or otherwise. 

(a) The Fund shall be entitled to consult with and advise management of the Company on significant business issues, including without
limitation management’s proposed quarterly and annual operating plans. Upon request by the Fund, management of the Company shall meet with authorized representatives of the Fund, at a mutually agreeable time and place, within thirty days after
the end of each calendar quarter for such consultation and advice and to review progress in achieving such plans. 
 (b) The Fund shall be
entitled to examine the books and records of the Company, inspect its facilities, and receive other information at reasonable times and intervals concerning the general status of the Company’s financial condition and operations. 

(c) For any period during which an authorized representative of the Fund is not a member of the Company’s Board of Directors, the Company
shall invite the Fund’s authorized representative to attend all meetings of the Board and in connection therewith shall provide to such representative copies of all notices, minutes, consents, and other materials that it provides to its
directors. Such representative may participate in discussions of matters brought before the Board, but shall in all other respects be a nonvoting observer. 

2. Limitation on Management Rights. The Company shall not be required under this Agreement to provide access to attorney-client
privileged communications or other information of an extremely sensitive nature the disclosure of which to the Fund would be materially detrimental to the Company. The Company acknowledges and agrees that the preceding sentence is not intended to
prevent the Fund from obtaining information necessary for the Fund to substantially participate in, or substantially influence the conduct of, management of the Company within the meaning of the Regulation. 

 3. Termination of Management Rights. The management rights granted in paragraph 1
above shall terminate upon the earlier of: (i) consummation of a sale of the Company’s securities pursuant to a registration statement filed by the Company under the Securities Act of 1933 in connection with a firm commitment underwritten
offering of the Company’s securities to the general public; (ii) any transaction (including, without limitation, a merger, acquisition or reorganization of the Company) pursuant to which the Fund exchanges 100% of the Securities for cash
and/or securities that are, have become, or will within 12 months become freely tradable on a United States domestic, national securities exchange; (iii) distribution by the Fund to its constituent partners of 100% of the Securities; or
(iv) any other transaction pursuant to which the Fund disposes of 100% of the Securities exclusively for cash and/or other consideration that does not include debt or equity securities or instruments. 

4. Confidentiality. Except as otherwise required by applicable law, the Fund and any authorized representative acting on behalf
of the Fund pursuant to this Agreement shall maintain the confidentiality of all proprietary Company information acquired pursuant to this Agreement and shall not disclose or use such information other than for a Company purpose or with the
Company’s consent. 
 5. Restructuring. Subject to paragraph 3, above, if the Company engages in a restructuring or
similar transaction, any resulting entity or entities shall be subject to this Agreement in the same manner as the Company. 
 6.
Counterparts. This Agreement may be executed in any number of counterparts and, when so executed, all of such counterparts shall constitute a single instrument binding upon all Parties notwithstanding the fact that all Parties are not
signatory to the original or to the same counterpart. 
 [Remainder of this page intentionally left blank; signature page follows.]

 IN WITNESS WHEREOF the Parties have executed this Management Rights Agreement as of the date
first above written. 
  

			
	SILVERBACK ACQUISITION CORPORATION
	a Delaware corporation
		
	By:	 	/s/ JOHN T. MCDONALD
		 	John T. McDonald,
		 	Chief Executive Officer

 [SIGNATURE PAGE TO MANAGEMENT
RIGHTS AGREEMENT] 

 IN WITNESS WHEREOF the Parties have executed this Management Rights Agreement as of the date
first above written. 
  

			
	AUSTIN VENTURES X, L.P.
	
	By: AV Partners X, L.P., its general partner
	By: AV Partners X, L.L.C., its general partner
		
	By: 	 	/s/ PHILIP SIEGEL
	Name:	 	Philip Siegel
	Title: 	 	General Partner

 [SIGNATURE PAGE TO MANAGEMENT
RIGHTS AGREEMENT]

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