Document:

EX-4.4

 Exhibit 4.4 

AMENDMENT NO. 3 TO 

PREFERRED SHARES RIGHTS AGREEMENT 

This AMENDMENT NO. 3 TO THE PREFERRED SHARES RIGHTS AGREEMENT (this “Amendment”) is dated as of December 15, 2014 (the
“Effective Date”) and amends the Preferred Shares Rights Agreement, dated as of November 11, 2013 (the “Rights Agreement”), as amended, by and between Riverbed Technology, Inc., a Delaware corporation (the
“Company”), and Computershare Trust Company, N.A., a federally chartered trust company, as rights agent (the “Rights Agent”). Capitalized terms used in this Amendment and not otherwise defined have the meaning given
to them in the Rights Agreement. 
 RECITALS 

WHEREAS, the Company has entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Project Homestake
Holdings, LLC (“Newco”) and Project Homestake Merger Sub Corp. (“Merger Sub”), dated as of December 14, 2014, pursuant to which, among other things, (a) Merger Sub shall be merged with and into the Company
(the “Merger”), whereupon the separate corporate existence of Merger Sub shall cease and the Company shall be the surviving Company (the “Surviving Company”) and a direct or indirect wholly owned subsidiary of Newco and
(b) each share of the common stock of the Company issued and outstanding immediately prior to the Effective Time (as defined in the Merger Agreement) (other than Dissenting Shares or Owned Shares (each as defined in the Merger Agreement) will
be automatically converted into and thereafter represent the right to receive the Merger Consideration (as defined in the Merger Agreement); 

WHEREAS, pursuant to resolutions adopted on December 14, 2014 (the “Board Resolutions”), the board of directors of the
Company (the “Board”) has adopted and approved the Merger Agreement; 
 WHEREAS, in accordance with Section 27 of the
Rights Agreement, prior to the Distribution Date, the Company may amend the Rights Agreement in any respect without the approval of any holders of Rights Certificates, Preferred Shares or Common Shares; 

WHEREAS, the Rights are currently redeemable and no person is an Acquiring Person; 

WHEREAS, pursuant to the Board Resolutions, and in connection with entering into the Merger Agreement, the Board has unanimously determined
that an amendment to the Rights Agreement is advisable, fair to and in the best interests of the Company and its stockholders; 
 WHEREAS,
the Company has delivered to the Rights Agent a certificate stating that this Amendment complies with Section 27 of the Rights Agreement; and 

WHEREAS, the Rights Agent is hereby directed to join in this Amendment. 

AGREEMENT 
 NOW,
THEREFORE, in consideration of the premises and the mutual agreements herein set forth herein, the parties hereby agree as follows: 

1. Amendment of the Rights Agreement. 

A. Section 1 of the Rights Agreement is hereby amended by adding the following additional definitions: 

(ddd) “Effective Time” has the meaning ascribed to such term in the Merger Agreement. 

(eee) “Merger” has the meaning ascribed to such term in the Merger Agreement. 

 (fff) “Merger Agreement” means that certain Agreement and Plan of Merger, dated
as of [                    ], 2014, among Newco, Merger Sub and the Company. 

(ggg) “Merger Sub” means Project Homestake Merger Sub Corp. 

(hhh) “Newco” means Project Homestake Holdings, LLC. 

(iii) “Voting Agreements” means each voting agreement in favor of Newco and Merger Sub to be executed substantially
concurrently with the execution of the Merger Agreement by certain directors, officers and stockholders of the Company. 
 B. The following
is added as a new Section 38 of the Rights Agreement: 
 “Section 38. Exception for Merger Agreement. Notwithstanding
anything to the contrary in this Agreement, none of the approval, execution, delivery or performance of the Merger Agreement or the Voting Agreements, or the consummation prior to the termination of the Merger Agreement of the Merger or any of the
other transactions contemplated by the Merger Agreement or Voting Agreements in accordance with their respective terms, shall (a) result in a Shares Acquisition Date, a Distribution Date or in any way permit any Rights to be exercised pursuant
to Section 7, or otherwise, for consideration or exchanged pursuant to Section 24; (b) constitute an event described in Section 11(a)(ii) or Section 13; (c) cause any of Newco, Merger Sub or their respective Affiliates
or Associates (each, a “Newco Exempt Person”) to be deemed to be an “Acquiring Person” for any purpose in this Agreement; or (d) cause any officer, director or employee of any Newco Exempt Person to be deemed to be,
solely by reason of such Person’s status or authority as such, the “Beneficial Owner” of or to “beneficially own” any securities that are “beneficially owned” by a Newco Exempt Person, including in a fiduciary
capacity. Nothing in this Agreement shall be construed to give any holder of Rights or any other Person any legal or equitable rights, remedy or claim under this Agreement in connection with the execution, delivery or performance of the Merger
Agreement or Voting Agreements, or the consummation prior to the termination of the Merger Agreement of the Merger or any of the other transactions contemplated by the Merger Agreement or Voting Agreements. Notwithstanding anything to the contrary
in this Agreement, immediately prior to the Effective Time and without any further action by the Rights Agent, the Company, Newco, Merger Sub or any current or former holder of Rights, this Agreement, the Rights, and any right to exercise the Rights
provided for hereunder shall terminate and be void and of no further force or effect.” 
 2. No Other Amendment; Effect of
Amendment. Except as and to the extent expressly modified by this Amendment, the Rights Agreement and the exhibits thereto remain in full force and effect in all respects without any modification. This Amendment will be deemed an amendment to
the Rights Agreement and will become effective on the Effective Date. In the event of a conflict or inconsistency between this Amendment and the Rights Agreement and the exhibits thereto, the provisions of this Amendment will govern. 

3. Counterparts. This Amendment may be executed in any number of counterparts and each of such counterparts will for all purposes
be deemed to be an original, and all such counterparts will together constitute one and the same instrument, it being understood that all parties need not sign the same counterpart. A signature to this Amendment transmitted electronically (including
by fax and .pdf) will have the same authority, effect and enforceability as an original signature. No party hereto may raise the use of such electronic transmission to deliver a signature, or the fact that any signature or agreement or instrument
was transmitted or communicated through such electronic transmission, as a defense to the formation of a contract, and each party forever waives any such defense, except to the extent such defense relates to lack of authenticity. 

4. Severability. If any term, provision, covenant or restriction of this Amendment is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions of this Amendment will remain in full force and effect and will in no way be affected, impaired or
invalidated; provided, however, that if any such excluded term, provision, covenant or restriction adversely affects the rights, immunities, duties or obligations of the Rights Agent, then the Rights Agent shall be entitled
to resign immediately. 

  
 -2- 

 5. Descriptive Headings. The descriptive headings of the several Sections of this
Amendment are inserted for convenience only and will not control or affect the meaning or construction of any of the provisions hereof. 

6. Further Assurances. Each of the parties to this Amendment will cooperate and take such action as may be reasonably requested by
the other party in order to carry out the provisions and purposes of this Amendment, the Rights Agreement and the transactions contemplated hereunder and thereunder. 

7. Governing Law. This Amendment will be deemed to be a contract made pursuant to the laws of the State of Delaware and for all
purposes will be governed by and construed in accordance with the laws of the State of Delaware applicable to contracts made and to be performed entirely within such State; provided, however, that all provisions regarding the
rights, duties and obligations of the Rights Agent will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed entirely within such State. 

[Signature page follows.] 

  
 -3- 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the
day and year first written above. 
  

			
	RIVERBED TECHNOLOGY, INC.
		
	By:	 	 /s/ Brett A. Nissenberg

	Name:	 	Brett A. Nissenberg
	Title:	 	General Counsel, Senior Vice President of Corporate and Legal Affairs and Secretary
	
	COMPUTERSHARE TRUST COMPANY, N.A.
		
	By:	 	 /s/ Joseph S. Campbell

	Name:	 	Joseph S. Campbell
	Title:	 	Vice President

 [Signature Page to Amendment No. 3 to Preferred Shares Rights Agreement]9.30.2014 - Exhibit 10.1

Exhibit 10.1
Robert R. Harl
327 East Friar Tuck Lane
Houston, Texas  77024

August 29, 2014

Willbros United States Holdings, Inc.
August 29, 2014
Page 2

VIA FEDEX
Willbros United States Holdings, Inc.
4400 Post Oak Parkway, Suite 1000
Houston, Texas  77027
Attention:  Chairman of the Board

Dear John:

Reference is made to that certain Employment Agreement dated as of September 20, 2010, between Willbros United States Holdings, Inc., a Delaware corporation (“WUSH”), and me, as amended by Amendment No. 1 thereto dated as of April 16, 2013, among WUSH, Willbros Group, Inc., a Delaware corporation (“WGI”), and me (as amended, the “Employment Agreement”).  Any capitalized terms used in this waiver letter but not defined herein shall be defined in accordance with the Employment Agreement.

WUSH, WGI and I agree that I am entitled to the Succession Award and the Succession Award shall be paid to me on December 31, 2014 in accordance with the terms of Section 4.3 of the Employment Agreement.  I hereby irrevocably waive any and all rights I may have under the Employment Agreement to receive a lump sum amount equal to 100% of my annual Base Salary pursuant to Section 7.1(a)(i) of the Employment Agreement in the event of an early termination of the Employment Agreement that is due to my Involuntary Separation from Service without Cause or my resignation for Good Reason.

During the remainder of the Employment Period, I hereby irrevocably waive any and all rights I may have under the Employment Agreement to terminate the Employment Agreement due to my resignation for Good Reason other than as a result of the occurrence of the event described in subparagraph (i) of the Good Reason definition in the Employment Agreement.

During the remainder of the Employment Period, I will not act on behalf of, or exercise any management responsibilities with respect to, WGI or any of its subsidiaries unless specifically requested by the Chairman of the Board of Directors of WGI. 

In return for my waivers in this waiver letter, WUSH will pay me my current salary and benefits through January 1, 2015 unless I am terminated under subparagraphs (ii), (iii), (iv), (vi) or (vii) of the Cause definition in the Employment Agreement.  Likewise, WUSH confirms that: (a) it will pay me my cash bonus for 2014, in accordance with the requirements of Section 4.2 of the Employment Agreement, (b) I will receive my LTI for 2014, in accordance with Section 4.3 of the Employment Agreement; and (c) all unvested LTI payments will vest automatically upon my resignation on January 2, 2015, in accordance with Section 4.3 of the Employment Agreement. I understand that, although my 2014 LTI is based on year-long performance metrics and will be calculated under those metrics at year-end, based on the results as of the date of this letter, I currently qualified for payment under those metrics. 

\4484k14 031.docx

Willbros United States Holdings, Inc.
August 29, 2014
Page 3

WUSH hereby irrevocably waives any and all right to terminate my employment under subparagraphs (i) and (v) of the Cause definition in the Employment Agreement, and waives my obligations (except as set forth in this waiver letter) under Section 3.2 of the Employment Agreement.

I hereby acknowledge and agree that this waiver letter and the events giving rise to this waiver letter shall not constitute an Involuntary Separation from Service for purposes of the Employment Agreement.  I further acknowledge and agree that, effective as of the date hereof and during the remainder of the Employment Period, I will report directly to the Chairman of the Board of Directors of WGI.

This waiver letter may be executed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same instrument.

	
		
	 
	/s/ Robert R. Harl

	 
	Robert R. Harl

Agreed and accepted this 29th day of August, 2014.

	
		
	 
	/s/ John T. McNabb, II

	 
	John T. McNabb, II

	 
	Chairman of the Board

	 
	Willbros United States Holdings, Inc and

	 
	Willbros Group, Inc.

\4484k14 031.docx

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