EX-4.3





 Exhibit 4.3 

EXECUTION VERSION 

SUPPLEMENTAL INDENTURE NO. 2 

SUPPLEMENTAL INDENTURE NO. 2 (this “Supplemental Indenture”), dated as of July 18, 2017, among RACKSPACE HOSTING, INC.,
a Delaware corporation (the “Issuer”), TRICORE SOLUTIONS, LLC, a Massachusetts limited liability company, GROUP BASIS, LLC, a Wisconsin limited liability company, TRICORE SOLUTIONS, INC., a Delaware corporation, and DATABASE
SPECIALISTS, INC., a California corporation (collectively, the “New Subsidiary Guarantors”), each a subsidiary of the Issuer, and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association, as trustee under the indenture
referred to below (the “Trustee”). 
 W I T N E S S E T H : 

WHEREAS the Issuer, certain Subsidiary Guarantors and the Trustee have heretofore executed an indenture, dated as of November 3, 2016 (as
amended, supplemented or otherwise modified, the “Indenture”), providing for the issuance of the Issuer’s 8.625% Senior Notes due 2024 (the “Notes”), initially in the aggregate principal amount of
$1,200,000,000; 
 WHEREAS Sections 4.11 and 12.07 of the Indenture provide that under certain circumstances the Issuer is required to
cause the New Subsidiary Guarantors to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Subsidiary Guarantors shall unconditionally guarantee all the Issuer’s Obligations under the Notes and the Indenture
pursuant to a Subsidiary Guarantee on the terms and conditions set forth herein; and 
 WHEREAS pursuant to Section 9.01 of the
Indenture, the Trustee and the Issuer are authorized to execute and deliver this Supplemental Indenture. 
 NOW THEREFORE, in consideration
of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Subsidiary Guarantors, the Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the holders of
the Notes as follows: 
 1.    Defined Terms. As used in this Supplemental Indenture, terms defined in the
Indenture or in the preamble or recital hereto are used herein as therein defined, except that the term “holders” in this Supplemental Indenture shall refer to the term “holders” as defined in the Indenture and the
Trustee acting on behalf of and for the benefit of such holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this
Supplemental Indenture as a whole and not to any particular Section hereof. 
 2.    Agreement to Guarantee. The
New Subsidiary Guarantors hereby agree, jointly and severally with all existing Subsidiary Guarantors (if any), to unconditionally guarantee the Issuer’s Obligations under the Notes and the Indenture on the terms and subject to the conditions
set forth in Article XII of the Indenture and to be bound by all other applicable provisions of the Indenture and the Notes and to perform all of the obligations and agreements of a Subsidiary Guarantor under the Indenture. 

  
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 3.    Notices. All notices or other communications to the New
Subsidiary Guarantors shall be given as provided in Section 13.02 of the Indenture. 
 4.     Ratification of
Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This
Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 

5.     Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
LAWS OF THE STATE OF NEW YORK. 
 6.     Trustee Makes No Representation. The Trustee makes no representation
as to the validity or sufficiency of this Supplemental Indenture, or for the recitals contained herein. 
 7.    
Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 

8.     Effect of Headings. The Section headings herein are for convenience only and shall not affect the
construction thereof. 
 [Remainder of page intentionally left blank.] 

  
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 IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed
as of the date first written above. 
  

			
	RACKSPACE HOSTING, INC.
		
	By:	 	 /s/ Louis Alterman

		 	 Name: Louis Alterman

		 	 Title: Chief Financial Officer, Executive Vice       President
and Treasurer



 [Signature Page to Supplemental Indenture No. 2] 

 












 
			
	 TRICORE SOLUTIONS, LLC

GROUP BASIS, LLC
 TRICORE SOLUTIONS, INC.

DATABASE SPECIALISTS, INC.,
 each as a Subsidiary
Guarantor

		
	By:	 	/s/ Christopher Rosas
		 	 Name: Christopher Rosas

		 	 Title: Treasurer and Secretary



 [Signature Page to Supplemental Indenture No. 2] 

 












 
			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, not in its individual capacity, but solely as Trustee
		
	By:	 	/s/ Raymond Delli Colli
		 	 Name: Raymond Delli Colli

		 	 Title: Vice President



 [Signature Page to Supplemental Indenture No. 2]