Document:

EX-10.43

 Exhibit 10.43 

FIRST AMENDMENT TO 

SECOND AMENDED AND RESTATED CREDIT AGREEMENT 

THIS FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of September 25, 2013,
by and among QUALITYTECH, LP, a Delaware limited partnership (“Borrower”), THE ENTITIES LISTED ON THE SIGNATURE PAGES HEREOF AS GUARANTORS (“Guarantors”), KEYBANK NATIONAL ASSOCIATION (“KeyBank”),
THE OTHER LENDERS WHICH ARE SIGNATORIES HERETO (KeyBank and the other lenders which are signatories hereto, collectively, the “Lenders”), and KEYBANK NATIONAL ASSOCIATION, a national banking association, as Agent (the
“Agent” for the Lenders). 
 W I T N E S S E T H: 

WHEREAS, Borrower, Guarantors, Agent, and the Lenders entered into that certain Second Amended and Restated Credit Agreement dated as of
May 1, 2013 (the “Credit Agreement”); 
 WHEREAS, Borrower and Guarantors have requested that the Agent and the Lenders make
certain modifications to the Credit Agreement; and 
 WHEREAS, the Agent and the Lenders have consented to such modifications, subject to
the execution and delivery of this Amendment. 
 NOW, THEREFORE, for and in consideration of the sum of TEN and NO/100 DOLLARS ($10.00), and
other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto do hereby covenant and agree as follows: 

1. Definitions. All terms used herein which are not otherwise defined herein shall have the meanings set forth in the Credit Agreement.

 2. Modification of the Credit Agreement. The Agent, the Lenders and the Borrower hereby amend the Credit Agreement as follows:

 (a) By inserting the following terms in §1.1 of the Credit Agreement, in the appropriate alphabetical order: 

“Regions Credit Agreement. The Credit Agreement, dated as of December 21, 2012, by and among Quality Investment Properties
Richmond, LLC, Quality Technology Services Richmond II, LLC, QualityTech LP, the lenders from time to time party thereto, Regions Bank, as administrative agent, and the other parties thereto, as amended by the First Amendment to Credit Agreement,
dated as of May 1, 2013, and the Second Amendment to Credit Agreement, dated as of September 25, 2013.” 
 “REIT
Joinder Agreement. The Limited Joinder Agreement with respect to the Credit Agreement to be executed and delivered by REIT pursuant to §7.26, such Limited Joinder Agreement to be in the form of Exhibit “F”
hereto.” 
 “Springing Guaranty. The Unconditional Guaranty of Payment and Performance to be executed and delivered by REIT
and, if applicable, Subsidiary General Partner, pursuant to §7.26, such Unconditional Guaranty of Payment and Performance to be in substantially the form of Exhibit “C” hereto, as the same may be modified, amended, restated or
ratified.” 

 “Subsidiary General Partner. After the occurrence of the IPO Event, if the REIT is
not the general partner of the Borrower, a direct Wholly Owned Subsidiary of REIT that is the sole general partner of the Borrower.” 

“Tax Protection Agreement. The Tax Protection Agreement made and entered into in connection with IPO Event by REIT, Borrower and
each of parties identified as a signatory on Schedule 2.1(a) thereto as a “Protected Partner”, as the same may be further varied, amended, restated, renewed, consolidated, extended or otherwise supplemented from time to time with the
approval of Agent.” 
 (b) By deleting in its entirety the definition of “Contribution Agreement” appearing in §1.1 of
the Credit Agreement, and inserting in lieu thereof the following: 
 “Contribution Agreement. That certain Second Amended and
Restated Contribution Agreement dated of even date herewith among the Borrower, the Guarantors a party thereto and each Additional Subsidiary Guarantor which may hereafter become a party thereto, as the same may be modified, amended or ratified from
time to time.” 
 (c) By deleting in its entirety the definition of “Guarantors” appearing in §1.1 of the Credit
Agreement, and inserting in lieu thereof the following: 
 “Guarantors. Collectively, those Subsidiaries of Borrower set forth on
Schedule 1.5 hereto, together with any Additional Subsidiary Guarantor and, following the occurrence of the IPO Event and execution of the Springing Guaranty, REIT (and, if applicable, Subsidiary General Partner).” 

(d) By deleting in its entirety the definition of “Guaranty” appearing in §1.1 of the Credit Agreement, and inserting in lieu
thereof the following: 
 “Guaranty. The Second Amended and Restated Unconditional Guaranty of Payment and Performance dated of
even date herewith given by the Guarantors a party thereto, each Additional Subsidiary Guarantor which may hereafter become a party thereto and, for the limited purposes described therein, Borrower, to and for the benefit of Agent and the Lenders,
as the same may be modified, amended, restated or ratified.” 
 (e) By deleting in its entirety the definition of “Loan
Documents” appearing in §1.1 of the Credit Agreement, and inserting in lieu thereof the following: 
 “Loan Documents.
This Agreement, the Notes, any Letter of Credit Request, the Guaranty, the Springing Guaranty, the REIT Joinder Agreement, the Contribution Agreement, and all other documents, instruments or agreements now or hereafter executed or delivered by or on
behalf of the Borrower or the Guarantors in connection with the Loans.” 
 (f) By deleting in its entirety the definition of
“Subsidiary Guarantors” appearing in §1.1 of the Credit Agreement, and inserting in lieu thereof the following: 

“Subsidiary Guarantors. The Persons that are a party to the Guaranty from time to time, including any and all Additional
Subsidiary Guarantors.” 

  
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 (g) By deleting in its entirety §7.12 of the Credit Agreement, and inserting in lieu thereof
the following: 
 “§7.12 Covenants Regarding REIT and Subsidiary General Partner. From and after the
creation of REIT, Borrower shall cause REIT and, if applicable, Subsidiary General Partner to comply with the following covenants: 

(a) REIT shall not directly or indirectly enter into or conduct any business other than in connection with the ownership,
acquisition and disposition of interests in the Borrower and, if applicable, direct interests in the Subsidiary General Partner, and the management of the business of the Borrower and, if applicable, the Subsidiary General Partner, and such
activities as are incidental thereto, all of which shall be solely in furtherance of the business of the Borrower and, if applicable the Subsidiary General Partner. REIT shall not own any assets other than (i) interests, rights, options,
warrants or convertible or exchangeable securities of the Borrower and, if applicable, direct interests in the Subsidiary General Partner, (ii) up to a one percent (1%) equity interest in any partnership or limited liability company at
least ninety-nine percent (99%) of the equity of which is owned, directly or indirectly, by the Borrower; (iii) assets that have been distributed to REIT by its Subsidiaries in accordance with §8.7 below that are held for ten
(10) Business Days or less (included within such time period shall be any time such assets are held by the Subsidiary General Partner, if applicable) pending further distribution to equity holders of REIT, (iv) assets received by REIT from
third parties (including, without limitation, the proceeds from any Equity Offering), that are held for ten (10) Business Days or less pending further contribution to Borrower, (v) such bank accounts or similar instruments as it deems
necessary to carry out its responsibilities under the limited partnership agreement of the Borrower and (vi) other tangible and intangible assets that, taken as a whole, are de minimis in relation to the net assets of Borrower and its
Subsidiaries, but which shall in no event include any Equity Interests other than those permitted in clauses (i) and (ii) of this subsection (a). 

(b) If Borrower and REIT create the Subsidiary General Partner for the purpose of being the sole general partner of Borrower,
then the Subsidiary General Partner shall not directly or indirectly enter into or conduct any business other than in connection with the ownership, acquisition and disposition of interests in the Borrower, and the management of the business of the
Borrower, and such activities as are incidental thereto, all of which shall be solely in furtherance of the business of the Borrower. The Subsidiary General Partner shall not own any assets other than (i) interests, rights, options, warrants or
convertible or exchangeable securities of Borrower, (ii) up to a one percent (1%) equity interest in any partnership or limited liability company at least ninety-nine percent (99%) of the equity of which is owned, directly or
indirectly, by the Borrower, (iii) assets that have been distributed to Subsidiary General Partner by its Subsidiaries in accordance with §8.7 below that are held for ten (10) Business Days or less pending further distribution to
equity holders of REIT, (iv) assets received by Subsidiary General Partner from third parties or by through REIT from third parties (including, without limitation, the proceeds from any Equity Offering), that are held for ten (10) Business
Days or less (included within such time period shall be any time such assets are held by REIT) pending further contribution to Borrower, (v) such bank accounts or similar instruments as it deems necessary to carry out its responsibilities under
the limited partnership agreement of the Borrower and (vi) other tangible and intangible assets that, taken as a whole, are de minimis in relation to the net assets of Borrower and its Subsidiaries, but which shall in no event include any
Equity Interests other than those permitted in clauses (i) and (ii) of this subsection (b). 

  
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 (c) REIT and, if applicable, the Subsidiary General Partner, shall comply with
its obligations under the limited partnership agreement of the Borrower, as amended from time to time. 
 (d) REIT and, if
applicable, Subsidiary General Partner, shall contribute or otherwise downstream to the Borrower within ten (10) Business Days or less (included within such time period shall be any time such assets are held by REIT and, if applicable, the
Subsidiary General Partner) any net assets received by REIT, or if applicable, Subsidiary General Partner, from third parties (including, without limitation, the proceeds from any Equity Offering), except to the extent permitted by §7.12(a).

 (e) REIT and, if applicable, Subsidiary General Partner, shall not dissolve, liquidate or otherwise wind up its business,
affairs or assets. 
 (f) The Borrower will provide Agent written notice within two (2) Business Days in the event that
Borrower becomes aware that REIT or, if applicable, Subsidiary General Partner, fails to comply with the terms and conditions of this §7.12. Notwithstanding anything to the contrary contained in this Agreement including, without limitation
§12.2(a), any failure by Borrower to provide any such notice required under this §7.12(f) shall be deemed an Event of Default hereunder. 

(g) Notwithstanding anything to the contrary contained in this Agreement, the failure of REIT and, if applicable, Subsidiary
General Partner, to comply with the terms and conditions of this §7.12 shall no longer be deemed a “Default,” and an Event of Default shall not be deemed to have occurred in the event that the Springing Recourse Event (as defined in
the Springing Guaranty) occurs.” 
 (h) By deleting §7.5(c) of the Credit Agreement in its entirety, and inserting in lieu thereof
the following: 
 “(c) Tax Protection Agreement. The Borrower will notify the Agent and any Protected Partner (as defined in the
Tax Protection Agreement) in writing at any time it is required to provide an opportunity to any Protected Partner to either (i) guarantee Qualified Guarantee Indebtedness (as defined in the Tax Protection Agreement), or (ii) enter into a
Deficit Restoration Obligation (as defined in the Tax Protection Agreement) as required under Article 3 of the Tax Protection Agreement. Notwithstanding anything to the contrary contained in this Agreement including, without limitation
§12.2(a), any failure by Borrower to provide any such notice required under the Tax Protection Agreement shall be deemed an Event of Default hereunder.” 

(i) By modifying §7.17 of the Credit Agreement by deleting the words “Parent Company” in both the heading and the third line
thereof, and inserting in lieu thereof the word “Borrower”. 
 (j) By modifying §7.17 of the Credit Agreement by adding the
parenthetical and words “(other than Subsidiary General Partner, if applicable)” after the word “Subsidiaries” in the second line thereof. 

(k) By modifying §7.18(d) of the Credit Agreement by inserting the word “Company” after the word “Parent” in the
fourth line thereof. 

  
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 (l) By modifying §7.22 of the Credit Agreement by deleting the word “Borrowers”
from the first line thereof, and inserting in lieu thereof the words “Borrower and Subsidiary Guarantors”. 
 (m) By deleting in
its entirety §7.26 of the Credit Agreement, and inserting in lieu thereof the following: 
 “§7.26 Creation
of REIT. As a condition to the occurrence of the IPO Event, the Borrower and Guarantors agree, as follows: 
 (a)
Schedule 7.26 hereto sets forth the organizational structure of REIT and the Borrower immediately following the IPO Event. Agent and Lenders consent to such structure, with such changes as the Borrower deems necessary, provided that
simultaneously with the occurrence of the IPO Event (i) the Borrower shall become an “operating partnership” which will own not less than 100% of the direct or indirect interests in the Subsidiary Guarantors, (ii) the structure
of the transaction shall be such that the financial results of the Borrower and its Subsidiaries would be Consolidated with the accounts of REIT, and (iii) REIT, or Subsidiary General Partner, shall be the sole general partner of the Borrower,
or with such other changes that the Agent shall approve, such approval not to be unreasonably withheld, conditioned or delayed; 

(b) all of the formation and contribution agreements related to the IPO Event shall be in form and substance reasonably
acceptable to Agent; 
 (c) If applicable, the Borrower and Guarantors shall cause Subsidiary General Partner to execute and
deliver the Springing Guaranty and to provide Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other documents and instruments as Agent may reasonably require; 

(d) The Borrower and Guarantors shall cause REIT to (i) execute and deliver the REIT Joinder Agreement to cause REIT to
be bound by the provisions of this Agreement applicable to REIT, (ii) execute and deliver the Springing Guaranty, and (iii) provide to Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other
documents and instruments as Agent may reasonably require in connection with the REIT Joinder Agreement and Springing Guaranty; and 

(e) the Borrower, Guarantors (including REIT and, if applicable, Subsidiary General Partner) and the Agent shall enter into
such amendments to the Loan Documents or other agreements as the Agent may reasonably require to reflect a structure different from that set forth on Schedule 7.26 hereto;” 

(n) By inserting the following new §7.27 into the Credit Agreement: 

“§7.27 Subsidiary General Partner. Following the occurrence of the IPO Event, if Borrower and REIT desire to create the
Subsidiary General Partner for the purpose of being the sole general partner of Borrower, then, as a condition to the transfer of the general partner interest in Borrower to the Subsidiary General Partner, Borrower and REIT shall (a) cause the
Subsidiary General Partner to simultaneously execute and deliver the Springing Guaranty to Agent and the Lenders, and (b) provide Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other documents and
instruments as Agent may reasonably require.” 

  
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 (o) By deleting in its entirety §8.1(e) of the Credit Agreement, and inserting in lieu
thereof the following: 
 “(e) Indebtedness arising under any contingent guaranty executed and delivered by REIT or Subsidiary General
Partner in connection the Regions Credit Agreement, which contingent guaranty shall be in substantially the same form as the Springing Guaranty;” 

(p) By modifying §8.1 of the Credit Agreement by inserting the words “or the Borrower” after the words “Parent
Company” in the thirteen and fourteenth lines of the last paragraph of such Section. 
 (q) By deleting in its entirety §8.3(o) of
the Credit Agreement, and inserting in lieu thereof the following: 
 “(o) Investments to consummate the organizational structure
described in §7.26(a) and the transactions contemplated by the formation and contribution agreements referenced in §7.26(b), and after the occurrence of the IPO Event, Investments contemplated by §7.27, in each case subject to the
terms and conditions provided in such Sections.” 
 (r) By modifying §8.4 of the Credit Agreement by inserting the following new
clause (vii) after the existing clause (vi) in such Section: 
 “and (vii) the restructurings contemplated by, and
subject to the terms and conditions provided in, §7.26(a) and (b) and §7.27.” 
 (s) By modifying §8.9 of the
Credit Agreement by inserting the words “, except in accordance with §8.20” at the end of such Section. 
 (t) By modifying
§8.20 of the Credit Agreement by inserting the words “and the other Obligations” after the word “Notes” in the third line thereof. 

(u) By deleting in its entirety §12.1(t) of the Credit Agreement, and inserting in lieu thereof the following: 

“(t) REIT or, if applicable, Subsidiary General Partner, fails to perform any term, covenant or agreement contained in §7.12,
§7.26 or §7.27 which they are required to perform;” 
 (v) By modifying §15 of the Credit Agreement by inserting the
following sentence at the end of such section: 
 “Notwithstanding anything to the contrary contained in this §15, REIT and, if
applicable, Subsidiary General Partner shall not have any expense reimbursement obligations in this §15 except as and to the extent provided in the Springing Guaranty.” 

  
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 (w) By modifying §16 of the Credit Agreement by inserting the following new subparagraph
(i) after the word “proceeding” in the twenty-fourth line thereof: 
 “(i) the acceptance by Agent and the Lenders of the
Investor Guaranties pursuant to §34 below” 
 (x) By modifying §16 of the Credit Agreement by inserting the following
sentence at the end of such section: 
 “Notwithstanding anything to the contrary contained in this §16, REIT and, if applicable,
Subsidiary General Partner shall not have any indemnification obligations in this §16 except as and to the extent provided in the Springing Guaranty.” 

(y) By deleting in its entirety §34 of the Credit Agreement, and inserting in lieu thereof the following: 

“§34. INVESTOR GUARANTIES. 

As an accommodation to Borrower, the Agent and the Lenders have agreed to accept from time to time, upon the request of Borrower, guaranties
from certain Persons who are shareholders, members, partners or affiliates of Borrower or REIT (such Persons are hereinafter referred to as the “Investor Guarantors”, and such guaranties are hereinafter referred to individually as the
“Investor Guaranty” and collectively as the “Investor Guaranties”); provided that the aggregate principal amount of the Obligations guaranteed by the Investor Guarantors shall not exceed $150,000,000.00. The form of each Investor
Guaranty shall be subject to the prior approval of Agent, which consent shall not be unreasonably withheld, delayed or conditioned. No Investor Guarantor shall be a Person with whom Agent or any Lender is prohibited by applicable law from doing
business with, including without limitation, by virtue of OFAC. Borrower shall deliver to Agent such information as Agent may reasonably request to verify the foregoing. Without limiting the foregoing, no event or circumstance which shall occur with
respect to any of such Investor Guarantors, nor any act or omission by Agent or any of the Lenders with respect to any of the Investor Guarantors or the Investor Guaranties, shall in any event limit, impair or otherwise affect the liability of the
Borrower or Guarantors to the Agent and the Lenders under this Agreement and the other Loan Documents, and the Borrower and Guarantors hereby waive and agree not to assert or take advantage of any defense based thereon. Agent may at any time in its
sole discretion, but only with the consent of the Investor Guarantor or in accordance with the terms of the Investor Guaranty (provided that consent of the Investor Guarantor shall not be required as a condition to Agent and the Lenders accepting
any payments or prepayments of the Obligations, or otherwise dealing with the Loan or the Loan Documents), release any Investor Guarantor from its Investor Guaranty without affecting the liability of Borrower or Guarantors under the Loan
Documents.” 
 (z) By deleting in its entirety §35 of the Credit Agreement, and inserting in lieu thereof the following: 

“§35 NON-RECOURSE TO REIT AND SUBSIDIARY GENERAL PARTNER. 

Except to the extent set forth in the Springing Guaranty and subject to the limitations described below, the Obligations of the
Borrower under this Agreement are non-recourse to the REIT and, if applicable, the Subsidiary General Partner, and payable only out of cash flow and assets of the Borrower and the other Guarantors. 

  
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Agent, the Lenders and the Lender Hedge Providers agree that neither the REIT, a Subsidiary General Partner, if applicable, nor their assets shall be liable for any of the Obligations of the
Borrower under this Agreement as a result of their status as a general partner of the Borrower. Notwithstanding the foregoing, (a) if an Event of Default occurs, nothing in this §35 shall in any way prevent or hinder the Agent or the
Lenders in the pursuit or enforcement of any right, remedy, or judgment against the Borrower or any of the other Guarantors, or any of their respective assets; (b) the REIT and, if applicable, the Subsidiary General Partner, shall be fully
liable to the Agent and the Lenders to the same extent that REIT, and if applicable, the Subsidiary General Partner, would be liable absent the foregoing provision of this §35 for fraud or willful misrepresentation by the Borrower, REIT, the
Subsidiary General Partner, if any, or any of their respective Affiliates or Subsidiaries (to the full extent of losses suffered by the Agent or any Lender by reason of such fraud or willful misrepresentation); and (c) nothing in this §35
shall be deemed to be a waiver of any right which Agent may have under §506(a), 506(b), 1111(b) or any other provision of the Bankruptcy Code or any successor thereto or similar provisions under applicable state law to file a claim against the
Borrower or any of the other Guarantors for the full amount of the Obligations.” 
 (aa) By deleting in its entirety Exhibit
“C” of the Credit Agreement, and inserting in lieu thereof Exhibit “C” attached to this Amendment. 
 (bb) By
deleting in its entirety Exhibit “F” of the Credit Agreement, and inserting in lieu thereof Exhibit “F” attached to this Amendment. 

3. References to Credit Agreement. All references in the Loan Documents to the Credit Agreement shall be deemed a reference to the
Credit Agreement as modified and amended herein. 
 4. Consent of Guarantors. By execution of this Amendment, Guarantors hereby
expressly consent to the modifications and amendments relating to the Credit Agreement and the Loan Documents as set forth herein, and Borrower and Guarantors hereby acknowledge, represent and agree that the Loan Documents (including without
limitation the Guaranty) remain in full force and effect and constitute the valid and legally binding obligation of Borrower and Guarantors, respectively, enforceable against such Persons in accordance with their respective terms, and that the
Guaranty extends to and applies to the foregoing documents as modified and amended. 
 5. Representations. Borrower and Guarantors
represent and warrant to Agent and the Lenders as follows: 
 (a) Authorization. The execution, delivery and performance of this
Amendment and the transactions contemplated hereby (i) are within the authority of Borrower and Guarantors, (ii) have been duly authorized by all necessary proceedings on the part of such Persons, (iii) do not and will not conflict
with or result in any breach or contravention of any provision of law, statute, rule or regulation to which any of such Persons is subject or any judgment, order, writ, injunction, license or permit applicable to such Persons, (iv) do not and
will not conflict with or constitute a default (whether with the passage of time or the giving of notice, or both) under any provision of the partnership agreement or certificate, certificate of formation, operating agreement, articles of
incorporation or other charter documents or bylaws of, or any mortgage, indenture, agreement, contract or other instrument binding upon, any of such Persons or any of its properties or to which any of such Persons is subject, and (v) do not and
will not result in or require the imposition of any lien or other encumbrance on any of the properties, assets or rights of such Persons, other than the liens and encumbrances created by the Loan Documents. 

  
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 (b) Enforceability. The execution and delivery of this Amendment are valid and legally
binding obligations of Borrower and Guarantors enforceable in accordance with the respective terms and provisions hereof, except as enforceability is limited by bankruptcy, insolvency, reorganization, moratorium or other laws relating to or
affecting generally the enforcement of creditors’ rights and the effect of general principles of equity. 
 (c) Approvals. The
execution, delivery and performance of this Amendment and the transactions contemplated hereby do not require the approval or consent of or approval of any Person or the authorization, consent, approval of or any license or permit issued by, or any
filing or registration with, or the giving of any notice to, any court, department, board, commission or other governmental agency or authority other than those already obtained. 

(d) Reaffirmation. Borrower and Guarantors reaffirm and restate as of the date hereof each and every representation and warranty made
by the Borrower, the Guarantors and their respective Subsidiaries in the Loan Documents or otherwise made by or on behalf of such Persons in connection therewith except for representations or warranties that expressly relate to an earlier date. 

6. No Default. By execution hereof, the Borrower and Guarantors certify that the Borrower and Guarantors are and will be in compliance
with all covenants under the Loan Documents after the execution and delivery of this Amendment, and that no Default or Event of Default has occurred and is continuing. 

7. Waiver of Claims. Borrower and Guarantors acknowledge, represent and agree that Borrower and Guarantors as of the date hereof have
no defenses, setoffs, claims, counterclaims or causes of action of any kind or nature whatsoever with respect to the Loan Documents, the administration or funding of the Loans or with respect to any acts or omissions of Agent or any of the Lenders,
or any past or present officers, agents or employees of Agent or any of the Lenders, and each of Borrower and Guarantors does hereby expressly waive, release and relinquish any and all such defenses, setoffs, claims, counterclaims and causes of
action, if any. 
 8. Ratification. Except as hereinabove set forth or in any other document previously executed or executed in
connection herewith, all terms, covenants and provisions of the Credit Agreement, the Notes and the Guaranty remain unaltered and in full force and effect, and the parties hereto do hereby expressly ratify and confirm the Loan Documents as modified
and amended herein. Nothing in this Amendment shall be deemed or construed to constitute, and there has not otherwise occurred, a novation, cancellation, satisfaction, release, extinguishment or substitution of the indebtedness evidenced by the
Notes or the other obligations of Borrower and Guarantors under the Loan Documents (including without limitation the Guaranty). 
 9.
Counterparts. This Amendment may be executed in any number of counterparts which shall together constitute but one and the same agreement. 

10. Miscellaneous. This Amendment shall be construed and enforced in accordance with the laws of the State of Georgia (excluding the
laws applicable to conflicts or choice of law). This Amendment shall be binding upon and shall inure to the benefit of the parties hereto and their respective permitted successors, successors-in-title and assigns as provided in the Loan Documents.

 11. Effective Date. This Amendment shall be deemed effective and in full force and effect as of the date hereof upon the execution
and delivery of this Amendment by Borrower, Guarantors, Agent and all of the Lenders. 

  
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 IN WITNESS WHEREOF, the parties hereto have set their hands and affixed their seals as of the day
and year first above written. 
  

					
	BORROWER:
	
	QUALITYTECH, LP, a Delaware limited partnership
		
	By:	 	QualityTech GP, LLC, a Delaware limited liability company, its general partner
			
		 	By:	 	 /s/ William H. Schafer

		 	Name:	 	William H. Schafer
		 	Title:	 	Chief Financial Officer
			
		 		 	(SEAL)

  

			
	GUARANTORS:
	
	QUALITY INVESTMENT PROPERTIES METRO, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY INVESTMENT PROPERTIES, SUWANEE, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY TECHNOLOGY SERVICES METRO II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	QUALITY TECHNOLOGY SERVICES, SUWANEE II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QLD INVESTMENT PROPERTIES WICHITA TECHNOLOGY GROUP, L.L.C., a Kansas limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY TECHNOLOGY SERVICES WICHITA II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY INVESTMENT PROPERTIES SACRAMENTO, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY TECHNOLOGY SERVICES SACRAMENTO II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	QUALITY INVESTMENT PROPERTIES MIAMI, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY TECHNOLOGY SERVICES, MIAMI II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY INVESTMENT PROPERTIES SANTA CLARA, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)
	
	QUALITY TECHNOLOGY SERVICES SANTA CLARA II, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	AGENT AND LENDERS:
	
	KEYBANK NATIONAL ASSOCIATION, individually and as Agent
		
	By:	 	 /s/ Timothy Sylvain

	Name:	 	Timothy Sylvain
	Title:	 	Vice President
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	BANK OF AMERICA, N.A.
		
	By:	 	 /s/ David Popp

	Name:	 	David Popp
	Title:	 	AVP
		
		 	(SEAL)

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	DEUTSCHE BANK AG NEW YORK BRANCH
		
	By:	 	 /s/ J.T. Johnston Coe

	Name:	 	J.T. Johnston Coe
	Title:	 	Managing Director
		
	By:	 	 /s/ David Naranjo

	Name:	 	David Naranjo
	Title:	 	Vice President
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	REGIONS BANK
		
	By:	 	 /s/ Kerri L. Raines

	Name:	 	Kerri L. Raines
	Title:	 	Vice President
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
 16 

 
			
	GOLDMAN SACHS BANK USA
		
	By:	 	 /s/ Michelle Latzoni

	Name:	 	Michelle Latzoni
	Title:	 	Authorized Signatory
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	PNC BANK, NATIONAL ASSOCIATION
		
	By:	 	 /s/ Brendan McGuire

	Name:	 	Brendan McGuire
	Title:	 	Senior Vice President
		
		 	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
 18 

 
			
	JPMORGAN CHASE BANK, N.A.
		
	By:	 	 /s/ Kimberly Turner

	Name:	 	Kimberly Turner
	Title:	 	Executive Director
	
	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	MORGAN STANLEY SENIOR FUNDING, INC.
		
	By:	 	 /s/ Nick Zangari

	Name:	 	Nick Zangari
	Title:	 	Vice President
	
	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	JEFFERIES GROUP LLC
		
	By:	 	 /s/ John Stacconi

	Name:	 	John Stacconi
	Title:	 	Global Treasurer
	
	(SEAL)

 [SIGNATURES CONTINUE ON FOLLOWING PAGE] 

  
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	STIFEL BANK & TRUST
		
	By:	 	 /s/ John H. Phillips

	Name:	 	John H. Phillips
	Title:	 	Executive Vice President
	
	(SEAL)

  
 22 

 EXHIBIT “C” 

FORM OF SPRINGING GUARANTY 

UNCONDITIONAL GUARANTY OF PAYMENT AND PERFORMANCE 

FOR AND IN CONSIDERATION OF the sum of Ten and No/100 Dollars ($10.00) and other good and valuable consideration paid or delivered to the
undersigned QTS REALTY TRUST, INC., a Maryland corporation (“REIT”), the receipt and sufficiency whereof are hereby acknowledged by REIT, and for the purpose of seeking to induce KEYBANK NATIONAL ASSOCIATION, a national
banking association (hereinafter referred to as “Lender”, which term shall also include each other Lender which may now be or hereafter become a party to the Credit Agreement, and shall also include any such individual Lender acting as
agent for all of the Lenders), to extend credit or otherwise provide financial accommodations to Borrower under the Credit Agreement, and seeking to induce the Lender Hedge Providers to provide financial accommodations by entering into derivative
contracts that may give rise to Hedge Obligations, which extension of credit and provision of financial accommodations will be to the direct interest, advantage and benefit of REIT, REIT does, upon the occurrence of a Springing Recourse Event (as
hereinafter defined), hereby, absolutely, unconditionally and irrevocably guarantee to Lender and the Lender Hedge Providers the complete payment and performance of the following liabilities, obligations and indebtedness of Borrower to Lender and
the Lender Hedge Providers (hereinafter referred to collectively as the “Obligations”) (capitalized terms that are used herein that are not otherwise defined herein shall have the meanings set forth in the Credit Agreement): 

(a) the full and prompt payment when due, whether by acceleration or otherwise, either before or after maturity thereof, of the Revolving
Credit Notes in the aggregate principal face amount of Three Hundred Fifty Million and No/100 Dollars ($350,000,000.00) made by Borrower to the order of certain of the Lenders, the Term Loan Notes in the aggregate principal face amount of Two
Hundred Twenty-Five Million and No/100 Dollars ($225,000,000.00) made by Borrower to the order of certain of the Lenders, which Revolving Credit Notes and Term Loan Notes are increasable to $675,000,000.00 as provided in the Credit Agreement, and
the Swing Loan Note in the principal face amount of Thirty Million and No/100 Dollars ($30,000,000.00) made by Borrower to the order of the Swing Loan Lender, together with interest as provided in the Revolving Credit Notes, the Term Loan Notes and
the Swing Loan Note, and together with any replacements, supplements, renewals, modifications, consolidations, restatements, increases and extensions thereof; and 

(b) the full and prompt payment when due, whether by acceleration or otherwise, either before or after maturity thereof, of each other note as
may be issued under that certain Second Amended and Restated Credit Agreement dated as of May 1, 2013 (as amended, restated, supplemented, or otherwise modified from time to time, the “Credit Agreement”) among Borrower, KeyBank, for
itself and as agent, and the other lenders now or hereafter a party thereto, together with interest as provided in each such note, together with any replacements, supplements, renewals, modifications, consolidations, restatements, increases, and
extensions thereof (the Revolving Credit Notes, the Term Loan Notes and Swing Loan Notes and each of the notes described in this subparagraph (b) are hereinafter referred to collectively as the “Note”); and 

(c) the full and prompt payment and performance of any and all obligations of Borrower to Lender under the terms of the Credit Agreement,
together with any replacements, supplements, renewals, modifications, consolidations, restatements, and extensions thereof; and 
 (d)
[intentionally omitted]; and 
 (e) the full and prompt payment and performance of each and all of the Hedge Obligations; and 

  
 EXHIBIT “C”
– PAGE 1 

 (f) the full and prompt payment and performance of any and all other obligations of Borrower to
Lender under any other agreements, documents or instruments now or hereafter evidencing, securing or otherwise relating to the indebtedness evidenced by the Note or the Credit Agreement (the Note, the Credit Agreement and said other agreements,
documents and instruments are hereinafter collectively referred to as the “Loan Documents” and individually referred to as a “Loan Document”). Without limiting the generality of the foregoing, REIT acknowledges the terms of
§2.11 of the Credit Agreement pursuant to which the Total Commitment under the Credit Agreement may be increased to up to $675,000,000.00 and agree that this Unconditional Guaranty of Payment and Performance (this “Guaranty”) shall
extend and be applicable to each new or replacement note delivered by Borrower in connection with any such increase of the Total Commitment and all other obligations of Borrower under the Loan Documents as a result of such increase without notice to
or consent from REIT. 
 Notwithstanding anything to the contrary contained herein, under no circumstances shall any of the
“Obligations” guaranteed hereby include any obligation that constitutes an Excluded Hedge Obligation of REIT. 
 1. Agreement
to Pay and Perform; Costs of Collection. Upon the occurrence of (a) REIT’s failure to perform any term, covenant or agreement contained in §7.12 of the Credit Agreement (each, an “Asset Covenant Breach”) and the passage
of forty-five days (45) after either (i) Borrower or REIT becomes aware of the Asset Covenant Breach, or (ii) Agent notifies Borrower in writing of any Asset Covenant Breach, (b) if, at any time, REIT guarantees, or otherwise
becomes obligated in respect of, any Indebtedness (other than a conditional or springing guaranty on terms substantially similar to the Springing Guaranty or Indebtedness permitted under §8.1(a), (b), (c), (d) or (f)), (c) REIT
(i) shall make an assignment for the benefit of creditors, or admit in writing its general inability to pay or generally fail to pay its debts as they mature or become due, or shall petition or apply for the appointment of a trustee or other
custodian, liquidator or receiver for it or any substantial part of its assets, (ii) shall commence any case or other proceeding relating to it under any bankruptcy, reorganization, arrangement, insolvency, readjustment of debt, dissolution or
liquidation or similar law of any jurisdiction, now or hereafter in effect, or (iii) shall take any action to authorize or in furtherance of any of the foregoing, (d) a petition or application shall be filed for the appointment of a
trustee or other custodian, liquidator or receiver of REIT or any substantial part of the REIT’s assets, or a case or other proceeding shall be commenced against REIT under any bankruptcy, reorganization, arrangement, insolvency, readjustment
of debt, dissolution or liquidation or similar law of any jurisdiction, now or hereafter in effect, and REIT shall indicate its approval thereof, consent thereto or acquiescence therein or such petition, application, case or proceeding shall not
have been dismissed within sixty (60) days following the filing or commencement thereof, (e) a decree or order is entered appointing a trustee, custodian, liquidator or receiver for REIT or adjudicating REIT, bankrupt or insolvent, or
approving a petition in any such case or other proceeding, or a decree or order for relief is entered in respect of REIT in an involuntary case under federal bankruptcy laws as now or hereafter constituted (each of 1(a), 1(b), 1(c), 1(d) and 1(e) of
this Guaranty being referred to a “Springing Recourse Event”), then REIT does hereby agree that following and during the continuance of an Event of Default under the Loan Documents if the Note is not paid by Borrower in accordance with its
terms, or if any and all sums which are now or may hereafter become due from Borrower to Lender under the Loan Documents are not paid by Borrower in accordance with their terms, or if any and all other obligations of Borrower to Lender under the
Note or of Borrower, any other Guarantor under the other Loan Documents are not performed by Borrower, or any other Guarantor, as applicable, in accordance with their terms, REIT will immediately upon demand make such payments and perform such
obligations. Upon the occurrence of a Springing Recourse Event, REIT further agrees to pay Lender on demand all reasonable costs and expenses (including court costs and reasonable attorneys’ fees and disbursements) paid or incurred by Lender in
endeavoring to collect the Obligations guaranteed hereby, to enforce any of the Obligations of Borrower guaranteed hereby, or any portion thereof, or to enforce this Guaranty, and until paid to Lender, such sums shall bear interest at the Default
Rate unless collection from REIT of interest at such rate would be contrary to applicable law, in which event such sums shall bear interest at the highest rate which may be collected from REIT under applicable law. REIT acknowledges and agrees that
the Obligations guaranteed hereunder shall automatically become fully effective upon a Springing Recourse Event and no other documentation shall be required to evidence same. 

  
 EXHIBIT “C”
– PAGE 2 

 2. Reinstatement of Refunded Payments. If, for any reason, any payment to Lender of any of
the Obligations guaranteed hereunder is required to be refunded by Lender to Borrower, or paid or turned over to any other Person, including, without limitation, by reason of the operation of bankruptcy, reorganization, receivership or insolvency
laws or similar laws of general application relating to creditors’ rights and remedies now or hereafter enacted, REIT agrees to pay to the Lender on demand an amount equal to the amount so required to be refunded, paid or turned over (the
“Turnover Payment”), the obligations of REIT shall not be treated as having been discharged by the original payment to Lender giving rise to the Turnover Payment, and this Guaranty shall be treated as having remained in full force and
effect for any such Turnover Payment so made by Lender, as well as for any amounts not theretofore paid to Lender on account of such obligations. 

3. Actions with Respect to Obligations. REIT hereby consents and agrees that Lender may at any time, and from time to time, without
thereby releasing REIT from any liability hereunder and without notice to or further consent from REIT or any other Person or entity, either with or without consideration: release or surrender any lien or other security of any kind or nature
whatsoever held by it or by any Person, firm or corporation on its behalf or for its account, securing any indebtedness or liability hereby guaranteed; substitute for any collateral so held by it, other collateral of like kind, or of any kind;
modify the terms of the Note or the Loan Documents; extend or renew the Note for any period; grant releases, compromises and indulgences with respect to the Note or the Loan Documents and to any Persons or entities now or hereafter liable thereunder
or hereunder; release any other Guarantor, surety, endorser or accommodation party of the Note or any other Loan Documents; or take or fail to take any action of any type whatsoever. No such action which Lender shall take or fail to take in
connection with the Note or the Loan Documents, or any of them, or any security for the payment of the indebtedness of Borrower to Lender or for the performance of any obligations or undertakings of Borrower, REIT or other Guarantor, nor any course
of dealing with Borrower or any other Person, shall release REIT’s obligations hereunder, affect this Guaranty in any way or afford REIT any recourse against Lender. The provisions of this Guaranty shall extend and be applicable to all
replacements, supplements, renewals, amendments, extensions, consolidations, restatements and modifications of the Note and the Loan Documents, and any and all references herein to the Note and the Loan Documents shall be deemed to include any such
replacements, supplements, renewals, extensions, amendments, consolidations, restatements or modifications thereof. Without limiting the generality of the foregoing, REIT acknowledges the terms of §18.3 of the Credit Agreement and agrees that
this Guaranty shall extend and be applicable to each new or replacement note delivered by Borrower pursuant thereto without notice to or further consent from REIT. 

4. No Contest with Lender; Subordination. So long as any of the Obligations hereby guaranteed remain unpaid or undischarged or any
Lender has any obligation to make Loans or issue Letters of Credit, REIT will not, by paying any sum recoverable hereunder (whether or not demanded by Lender) or by any means or on any other ground, claim any set-off or counterclaim against Borrower
in respect of any liability of REIT to Borrower or, in proceedings under federal bankruptcy law or insolvency proceedings of any nature, prove in competition with Lender in respect of any payment hereunder or be entitled to have the benefit of any
counterclaim or proof of claim or dividend or payment by or on behalf of Borrower or the benefit of any other security for any of the Obligations hereby guaranteed which, now or hereafter, Lender may hold or in which it may have any share. REIT
hereby expressly waives any right of contribution from or indemnity against Borrower or any other Guarantor, whether at law or in equity, arising from any payments made by REIT pursuant to the terms of this Guaranty, and REIT acknowledges
that REIT has no right whatsoever to proceed against Borrower or any other Guarantor for reimbursement of any such payments. In connection with the foregoing, REIT expressly waives any and all rights of subrogation to Lender against Borrower or any
other Guarantor, and REIT hereby waives any rights to enforce any remedy which Lender may have against Borrower or any other Guarantor and any rights to participate in any collateral for Borrower’s obligations under the Loan Documents. REIT
hereby subordinates any and all indebtedness of Borrower now or hereafter owed to REIT to all indebtedness of Borrower or any other Guarantor to Lender, and agrees with Lender that (a) REIT shall not demand or accept any payment from Borrower
or any other Guarantor on account of such indebtedness, (b) REIT shall not claim any offset or other reduction of REIT’s obligations hereunder because of any such indebtedness, and (c) REIT shall not take any action to obtain any

  
 EXHIBIT “C”
– PAGE 3 

 
interest in any of the security, if any, described in and encumbered by the Loan Documents because of any such indebtedness; provided, however, that, if Lender so requests, such indebtedness
shall be collected, enforced and received by REIT as trustee for Lender and be paid over to Lender on account of the indebtedness of Borrower to Lender, but without reducing or affecting in any manner the liability of REIT under the other provisions
of this Guaranty except to the extent the principal amount or other portion of such outstanding indebtedness shall have been reduced by such payment. 

5. Waiver of Defenses. REIT hereby agrees that its obligations hereunder shall not be affected or impaired by, and hereby waives and
agrees not to assert or take advantage of any defense based on: 
 (a) (i) any change in the amount, interest rate or due date or other term
of any of the obligations hereby guaranteed, (ii) any change in the time, place or manner of payment of all or any portion of the obligations hereby guaranteed, (iii) any amendment or waiver of, or consent to the departure from or other
indulgence with respect to, the Credit Agreement, any other Loan Document, or any other document or instrument evidencing or relating to any obligations hereby guaranteed, or (iv) any waiver, renewal, extension, addition, or supplement to, or
deletion from, or any other action or inaction under or in respect of, the Credit Agreement, any of the other Loan Documents, or any other documents, instruments or agreements relating to the obligations hereby guaranteed or any other instrument or
agreement referred to therein or evidencing any obligations hereby guaranteed or any assignment or transfer of any of the foregoing; 
 (b)
any subordination of the payment of the obligations hereby guaranteed to the payment of any other liability of Borrower, any other Guarantor or any other Person; 

(c) any act or failure to act by Borrower or any other Person which may adversely affect REIT’s subrogation rights, if any, against
Borrower, any other Guarantor or any other Person to recover payments made under this Guaranty; 
 (d) nonperfection or impairment of any
security interest or other Lien on any collateral, if any, securing in any way any of the obligations hereby guaranteed; 
 (e) any
application of sums paid by Borrower or any other Person with respect to the liabilities of Lender, regardless of what liabilities of Borrower remains unpaid; 

(f) any defense of Borrower, including without limitation, the invalidity, illegality or unenforceability of any of the Obligations; 

(g) either with or without notice to REIT, any renewal, extension, modification, amendment or other changes in the Obligations, including but
not limited to any material alteration of the terms of payment or performance of the Obligations; 
 (h) any statute of limitations in any
action hereunder or for the collection of the Note or for the payment or performance of any obligation hereby guaranteed; 
 (i) the
incapacity, lack of authority, death or disability of Borrower or any other Person or entity, or the failure of Lender to file or enforce a claim against the estate (either in administration, bankruptcy or in any other proceeding) of Borrower, REIT,
any other Guarantor or any other Person or entity; 
 (j) the dissolution or termination of existence of Borrower, REIT, any other Guarantor
or any other Person or entity; 
 (k) the voluntary or involuntary liquidation, sale or other disposition of all or substantially all of the
assets of Borrower, REIT, any other Guarantor or any other Person or entity; 

  
 EXHIBIT “C”
– PAGE 4 

 (l) the voluntary or involuntary receivership, insolvency, bankruptcy, assignment for the benefit
of creditors, reorganization, assignment, composition, or readjustment of, or any similar proceeding affecting, Borrower, REIT any other Guarantor or any other Person or entity, or any of Borrower’s, REIT’s or any other Guarantor’s or
any other Person’s or entity’s properties or assets; 
 (m) the damage, destruction, condemnation, foreclosure or surrender of all
or any part of the Real Estate or any of the improvements located thereon; 
 (n) the failure of Lender to give notice of the existence,
creation or incurring of any new or additional indebtedness or obligation of Borrower or of any action or nonaction on the part of any other Person whomsoever in connection with any obligation hereby guaranteed; 

(o) any failure or delay of Lender to commence an action against Borrower or any other Person, to assert or enforce any remedies against
Borrower under the Note or the other Loan Documents, or to realize upon any security; 
 (p) any failure of any duty on the part of Lender
to disclose to REIT any facts it may now or hereafter know regarding Borrower (including, without limitation Borrower’s financial condition), any other Guarantor or any other Person, any collateral, or any other assets or liabilities of such
Persons, whether such facts materially increase the risk to REIT or not (it being agreed that REIT assumes responsibility for being informed with respect to such information); 

(q) failure to accept or give notice of acceptance of this Guaranty by Lender; 

(r) failure to make or give notice of presentment and demand for payment of any of the indebtedness or performance of any of the obligations
hereby guaranteed; 
 (s) failure to make or give protest and notice of dishonor or of default to REIT or to any other party with respect to
the indebtedness or performance of obligations hereby guaranteed; 
 (t) any and all other notices whatsoever to which REIT might otherwise
be entitled; 
 (u) any lack of diligence by Lender in collection, protection or realization upon any collateral securing the payment of the
indebtedness or performance of obligations hereby guaranteed; 
 (v) the invalidity or unenforceability of the Note, or any of the other
Loan Documents, or any assignment or transfer of the foregoing; 
 (w) the compromise, settlement, release or termination of any or all of
the obligations of Borrower under the Note or the other Loan Documents or the Hedge Obligations; 
 (x) any transfer by Borrower or any
other Person of all or any part of the security, if any, encumbered by the Loan Documents; 
 (y) the failure of Lender to perfect any
security or to extend or renew the perfection of any security; or 
 (z) to the fullest extent permitted by law, any other legal, equitable
or surety defenses whatsoever to which REIT might otherwise be entitled, it being the intention that the obligations of REIT hereunder are absolute, unconditional and irrevocable. 

REIT understands that the exercise by Lender of certain rights and remedies may affect or eliminate Guarantor’s right of subrogation
against Borrower or the other Guarantors and that REIT may therefore incur partially or totally nonreimbursable liability hereunder. Nevertheless, REIT hereby authorizes and empowers Lender, its successors, endorsees and assigns, to exercise in its
or their sole discretion, any rights and 

  
 EXHIBIT “C”
– PAGE 5 

 
remedies, or any combination thereof, which may then be available, it being the purpose and intent of REIT that the obligations hereunder shall, upon the occurrence of a Springing Recourse Event,
be absolute, continuing, independent and unconditional under any and all circumstances. Notwithstanding any other provision of this Guaranty to the contrary, REIT hereby waives and releases any claim or other rights which REIT may now have or
hereafter acquire against Borrower or any other Guarantor or other Person of all or any of the obligations of REIT hereunder that arise from the existence or performance of REIT’s obligations under this Guaranty or any of the other Loan
Documents, including, without limitation, any right of subrogation, reimbursement, exoneration, contribution or indemnification, any right to participate in any claim or remedy of Lender against Borrower or any other Guarantor or other Person or any
collateral which Lender now has or hereafter acquires, whether or not such claim, remedy or right arises in equity or under contract, statute or common law, by any payment made hereunder or otherwise, including, without limitation, the right to take
or receive from Borrower or any other Guarantor, directly or indirectly, in cash or other property or by setoff or in any other manner, payment or security on account of such claim or other rights, except for those rights of other Guarantors under
the Contribution Agreement. 
 6. Guaranty of Payment and Performance and Not of Collection. This is a guaranty of payment and
performance and not of collection. Upon the occurrence of a Springing Recourse Event, the liability of REIT under this Guaranty shall be primary, direct and immediate and not conditional or contingent upon the pursuit of any remedies against
Borrower or any other Person, nor against securities or liens available to Lender, its successors, successors in title, endorsees or assigns. REIT hereby waives any right to require that an action be brought against Borrower or any other Person or
to require that resort be had to any security or to any balance of any deposit account or credit on the books of Lender in favor of Borrower or any other Person. 

7. Rights and Remedies of Lender. In the event of an Event of Default under the Note or the Loan Documents, or any of them, that is
continuing (it being understood that the Lender has no obligation to accept cure after an Event of Default occurs), Lender shall have the right to enforce its rights, powers and remedies thereunder or hereunder or under any other Loan Document, in
any order, and all rights, powers and remedies available to Lender in such event shall be nonexclusive and cumulative of all other rights, powers and remedies provided thereunder or hereunder or by law or in equity. Accordingly, REIT hereby
authorizes and empowers Lender upon the occurrence and during the continuance of any Event of Default under the Note or the Loan Documents, at its sole discretion, and without notice to REIT, to exercise any right or remedy which Lender may have,
including, but not limited to, judicial foreclosure, exercise of rights of power of sale, acceptance of a deed or assignment in lieu of foreclosure, appointment of a receiver to collect rents and profits, exercise of remedies against personal
property, or enforcement of any assignment of leases, as to any security, whether real, personal or intangible. At any public or private sale of any security or collateral for any of the Obligations guaranteed hereby, whether by foreclosure or
otherwise, Lender may, in its discretion, purchase all or any part of such security or collateral so sold or offered for sale for its own account and may apply against the amount bid therefor all or any part of the balance due it pursuant to the
terms of the Note or any other Loan Document without prejudice to Lender’s remedies hereunder against REIT for deficiencies. If the Obligations guaranteed hereby are partially paid by reason of the election of Lender to pursue any of the
remedies available to Lender, or if such Obligations are otherwise partially paid, this Guaranty shall nevertheless remain in full force and effect, and REIT shall, upon the occurrence of a Springing Recourse Event, remain liable for the entire
balance of the Obligations guaranteed hereby even though any rights which REIT may have against Borrower or any other Person may be destroyed or diminished by the exercise of any such remedy. 

8. Application of Payments. REIT hereby authorizes Lender, without notice to REIT, to apply all payments and credits received from
Borrower, REIT, any other Guarantor or any other Person or realized from any security in such manner and in such priority as Lender in its sole judgment shall see fit to the Obligations. 

9. Business Failure, Bankruptcy or Insolvency. In the event of the business failure of REIT or if there shall be pending any bankruptcy
or insolvency case or proceeding with respect to REIT under federal 

  
 EXHIBIT “C”
– PAGE 6 

 
bankruptcy law or any other applicable law or in connection with the insolvency of REIT, or if a liquidator, receiver, or trustee shall have been appointed for REIT or REIT’s properties or
assets, Lender may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of Lender allowed in any proceedings relative to REIT, or any of REIT’s properties or assets, and,
irrespective of whether the indebtedness or other obligations of Borrower guaranteed hereby shall then be due and payable, by declaration or otherwise, Lender shall be entitled and empowered to file and prove a claim for the whole amount of any sums
or sums owing with respect to the indebtedness or other obligations of Borrower guaranteed hereby, and to collect and receive any moneys or other property payable or deliverable on any such claim. REIT covenants and agrees that upon the commencement
of a voluntary or involuntary bankruptcy proceeding by or against Borrower, REIT shall not seek a supplemental stay or otherwise pursuant to 11 U.S.C. §105 or any other provision of the Bankruptcy Code, as amended, or any other debtor relief
law (whether statutory, common law, case law, or otherwise) of any jurisdiction whatsoever, now or hereafter in effect, which may be or become applicable, to stay, interdict, condition, reduce or inhibit the ability of Lender to enforce any rights
of Lender against REIT by virtue of this Guaranty or otherwise. 
 10. Covenants of REIT. REIT hereby covenants and agrees with
Lender that until all indebtedness guaranteed hereby has been completely repaid and all obligations and undertakings of Borrower under, by reason of, or pursuant to the Note and the other Loan Documents have been completely performed and Lender has
no further obligation to make Loans, REIT will comply with any and all covenants applicable to REIT set forth in the Credit Agreement. 

11. Rights of Set-off. In addition to any rights now or hereafter granted under any of the other Loan Documents or applicable law and
not by way of limitation of any such rights, REIT hereby grants to Lender, during the continuance of any Event of Default under the Note or the Loan Documents, at any time and without notice to REIT, the right to set-off and apply the whole or any
portion or portions of any or all deposits (general or specific, time or demand, provisional or final, regardless of currency, maturity, or the branch of Lender where the deposits are held) now or hereafter held by Lender and other sums credited by
or due from Lender to REIT or subject to withdrawal by REIT against amounts payable under this Guaranty, whether or not any other person or persons could also withdraw money therefrom. Any security now or hereafter held by or for REIT and provided
by Borrower, or by anyone on Borrower’s behalf, in respect of liabilities of REIT hereunder shall be held in trust for Lender as security for the liabilities of REIT hereunder. 

12. Changes in Writing; No Revocation. This Guaranty may not be changed orally, and no obligation of REIT can be released or waived by
Lender except as provided in §27 of the Credit Agreement. This Guaranty shall be irrevocable by REIT until all indebtedness guaranteed hereby has been completely repaid and all obligations and undertakings of Borrower and REIT under, by reason
of, or pursuant to the Note and the other Loan Documents have been completely performed and the Lenders have no further obligation to advance Loans under the Credit Agreement or issue Letters of Credit. 

13. Notices. Each notice, demand, election or request provided for or permitted to be given pursuant to this Guaranty (hereinafter in
this §13 referred to as “Notice”), but specifically excluding to the maximum extent permitted by law any notices of the institution or commencement of foreclosure proceedings, must be in writing and shall be deemed to have been
properly given or served by personal delivery or by sending same by overnight courier or by depositing same in the United States Mail, postpaid and registered or certified, return receipt requested, or as expressly permitted herein, by facsimile,
and addressed as follows: 
 The address of Lender is: 

KeyBank National Association, as Agent 

4910 Tiedeman Road, 3rd Floor 

Brooklyn, Ohio 44144 
 Attn: Real
Estate Capital Services 

  
 EXHIBIT “C”
– PAGE 7 

 With a copy to: 

KeyBank National Association 
 127
Public Square 
 Cleveland, Ohio 44114-1306 

Attn: Mr. Timothy Sylvain 

Facsimile No.: (216) 689-5819 

With a copy to: 
 McKenna
Long & Aldridge LLP 
 303 Peachtree Street, Suite 5300 

Atlanta, Georgia 30308 
 Attn:
William F. Timmons, Esq. 
 The address of REIT is: 

c/o Quality Companies, LLC 
 12851
Foster Street, Suite 205 
 Overland Park, Kansas 66213 

Attn: CEO/President 
 Facsimile
No. (913) 814-7766 
 With a copy to: 

c/o Quality Companies, LLC 
 12851
Foster Street, Suite 205 
 Overland Park, Kansas 66213 

Attn: Corporate Counsel 

Facsimile No. (913) 814-7766 

With a copy to: 
 Stinson Morrison
Hecker LLP 
 1201 Walnut Street, Suite 2900 

Kansas City, Missouri 64106-2150 

Attn: Patrick J. Respeliers 

Facsimile No. (816) 412-8174 

Each Notice shall be effective upon being personally delivered or upon being sent by overnight courier or upon being deposited in the United
States Mail as aforesaid, or if transmitted by facsimile is permitted, upon being sent and confirmation of receipt. The time period in which a response to such Notice must be given or any action taken with respect thereto (if any), however, shall
commence to run from the date of receipt if personally delivered or sent by overnight courier, or if so deposited in the United States Mail, the earlier of three (3) Business Days following such deposit or the date of receipt as disclosed on
the return receipt. Rejection or other refusal to accept or the inability to deliver because of changed address for which no notice was given shall be deemed to be receipt of the Notice sent. By giving at least fifteen (15) days’ prior
Notice thereof, Borrower, REIT or Lenders shall have the right from time to time and at any time during the term of this Agreement to change their respective addresses and each shall have the right to specify as its address any other address within
the United States of America. 

  
 EXHIBIT “C”
– PAGE 8 

 14. Governing Law. REIT ACKNOWLEDGES AND AGREES THAT THIS GUARANTY AND THE OBLIGATIONS OF
REIT HEREUNDER SHALL BE GOVERNED BY AND INTERPRETED AND DETERMINED IN ACCORDANCE WITH THE LAWS OF THE STATE OF GEORGIA. 
 15. CONSENT TO
JURISDICTION; WAIVERS. REIT HEREBY IRREVOCABLY AND UNCONDITIONALLY (A) SUBMITS TO PERSONAL JURISDICTION IN THE STATE OF GEORGIA OVER ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS GUARANTY, AND (B) WAIVES ANY AND ALL
PERSONAL RIGHTS UNDER THE LAWS OF ANY STATE (I) TO THE RIGHT, IF ANY, TO TRIAL BY JURY (LENDER HAVING ALSO WAIVED SUCH RIGHT TO TRIAL BY JURY), (II) TO OBJECT TO JURISDICTION WITHIN THE STATE OF GEORGIA OR VENUE IN ANY PARTICULAR FORUM WITHIN
THE STATE OF GEORGIA, AND (III) TO THE RIGHT, IF ANY, TO CLAIM OR RECOVER ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES OTHER THAN OR IN ADDITION TO ACTUAL DAMAGES. EACH LENDER IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY
AND ALL RIGHTS UNDER THE LAWS OF ANY STATE TO THE RIGHT, IF ANY, TO TRIAL BY JURY. REIT HEREBY WAIVES ITS RIGHTS TO PERSONAL SERVICE AND AGREES THAT, IN ADDITION TO ANY METHODS OF SERVICE OF PROCESS PROVIDED FOR UNDER APPLICABLE LAW, ALL SERVICE OF
PROCESS IN ANY SUCH SUIT, ACTION OR PROCEEDING MAY BE MADE BY CERTIFIED OR REGISTERED MAIL, RETURN RECEIPT REQUESTED, DIRECTED TO REIT AT THE ADDRESS SET FORTH IN PARAGRAPH 13 ABOVE, AND SERVICE SO MADE SHALL BE COMPLETE FIVE (5) DAYS AFTER THE
SAME SHALL BE SO MAILED. NOTHING CONTAINED HEREIN, HOWEVER, SHALL PREVENT LENDER FROM BRINGING ANY SUIT, ACTION OR PROCEEDING OR EXERCISING ANY RIGHTS AGAINST ANY SECURITY, IF ANY, AND AGAINST REIT PERSONALLY, AND AGAINST ANY PROPERTY OF REIT,
WITHIN ANY OTHER STATE. INITIATING SUCH SUIT, ACTION OR PROCEEDING OR TAKING SUCH ACTION IN ANY STATE SHALL IN NO EVENT CONSTITUTE A WAIVER OF THE AGREEMENT CONTAINED HEREIN THAT THE LAWS OF THE STATE OF GEORGIA SHALL GOVERN THE RIGHTS AND
OBLIGATIONS OF REIT AND LENDER HEREUNDER OR OF THE SUBMISSION HEREIN MADE BY REIT TO PERSONAL JURISDICTION WITHIN THE STATE OF GEORGIA. REIT HEREBY WAIVES ANY OBJECTION THAT IT MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY SUCH SUIT OR ANY SUCH
COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT COURT. REIT CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY LENDER HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH LENDER WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE
FOREGOING WAIVERS AND ACKNOWLEDGE THAT LENDER HAS BEEN INDUCED TO ENTER INTO THIS GUARANTY AND THE OTHER LOAN DOCUMENTS TO WHICH THEY ARE PARTIES BY, AMONG OTHER THINGS, THE WAIVERS AND CERTIFICATIONS CONTAINED IN THIS PARAGRAPH 15. REIT
ACKNOWLEDGES THAT IT HAS HAD AN OPPORTUNITY TO REVIEW THIS PARAGRAPH 15 WITH ITS LEGAL COUNSEL AND THAT REIT AGREES TO THE FOREGOING AS ITS FREE, KNOWING AND VOLUNTARY ACT. 

16. Successors and Assigns. The provisions of this Guaranty shall be binding upon REIT and its successors, successors in title, legal
representatives, and assigns, and shall inure to the benefit of Lender, its successors, successors in title, legal representatives and assigns and the holders of the Hedge Obligations. REIT shall not assign or transfer any of its rights or
obligations under this Guaranty without the prior written consent of Lender. 
 17. Assignment by Lender. This Guaranty is assignable
by Lender in whole or in part in conjunction with any assignment of the Note or portions thereof, and any assignment hereof or any transfer or assignment of the Note or portions thereof by Lender shall operate to vest in any such assignee the rights
and powers, in whole or in part, as appropriate, herein conferred upon and granted to Lender. 

  
 EXHIBIT “C”
– PAGE 9 

 18. Severability. If any term or provision of this Guaranty shall be determined to be
illegal or unenforceable, all other terms and provisions hereof shall nevertheless remain effective and shall be enforced to the fullest extent permitted by law. 

19. Disclosure. REIT agrees that in addition to disclosures made in accordance with standard banking practices, any Lender may disclose
information obtained by such Lender pursuant to this Guaranty to assignees or participants and potential assignees or participants hereunder subject to the terms of the Credit Agreement. 

20. No Unwritten Agreements. THIS GUARANTY REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE
OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. 
 21.
Time of the Essence. Time is of the essence with respect to each and every covenant, agreement and obligation of REIT under this Guaranty. 

22. Ratification. REIT does hereby restate, reaffirm and ratify each and every warranty and representation regarding REIT or its
Subsidiaries set forth in the Credit Agreement as if the same were more fully set forth herein. 
 23. Reserved. 

24. Fair Consideration. The REIT represents that the REIT is engaged in common business enterprises related to those of Borrower and
REIT will derive substantial direct or indirect economic benefit from the effectiveness and existence of the Credit Agreement. 
 25.
Counterparts. This Guaranty and any amendment hereof may be executed in several counterparts and by each party on a separate counterpart, each of which when so executed and delivered shall be an original, and all of which together shall
constitute one instrument. In proving this Guaranty it shall not be necessary to produce or account for more than one such counterpart signed by the party against whom enforcement is sought. 

26. Condition of Borrower. Without reliance on any information supplied by the Lender, REIT has independently taken, and will continue
to take, whatever steps it deems necessary to evaluate the financial condition and affairs of Borrower, and the Lender shall not have any duty to advise REIT of information at any time known to the Lender regarding such financial condition or
affairs or any collateral, if any. 
 [CONTINUED ON NEXT PAGE] 

  
 EXHIBIT “C”
– PAGE 10 

 IN WITNESS WHEREOF, REIT has executed this Guaranty under seal as of this
     day of             , 20    . 
  

			
	REIT:
	
	QTS REALTY TRUST, INC., a Maryland corporation
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	(SEAL)

 [Signatures Continued on Next Page] 

  
 EXHIBIT “C”
– PAGE 11 

 Lender joins in the execution of this Guaranty for the sole and limited purpose of evidencing its
agreement to the waiver of the right to trial by jury contained in Paragraph 15 hereof. 
  

			
	KEYBANK NATIONAL ASSOCIATION,
	as Agent for the Lenders
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	(SEAL)

  
 EXHIBIT “C”
– PAGE 12 

 EXHIBIT “F” 

FORM OF LIMITED JOINDER AGREEMENT 

THIS LIMITED JOINDER AGREEMENT (“Joinder Agreement”) is executed as of
            , 20    , by
                                        , a
                                        
(“REIT”), and delivered to KeyBank National Association, as Agent, pursuant to §7.12 of the Second Amended and Restated Credit Agreement dated as of May 1, 2013, as from time to time in effect (the “Credit Agreement”),
among the Borrower, KeyBank National Association, for itself and as Agent, and the other Lenders from time to time party thereto. Terms used but not defined in this Joinder Agreement shall have the meanings defined for those terms in the Credit
Agreement. 
 RECITALS 

A. As a condition to the occurrence of the IPO Event, REIT is required, pursuant to §7.26 of the Credit Agreement, to become a party to
the Credit Agreement in order to be bound by certain provisions thereof. 
 B. REIT expects to realize direct and indirect benefits as a
result of the availability to the Borrower of the credit facilities under the Credit Agreement. 
 NOW, THEREFORE, REIT agrees as follows:

 AGREEMENT 
 1.
Joinder. By this Joinder Agreement, REIT hereby becomes a party to the Credit Agreement. REIT hereby expressly assumes and agrees to be bound by those provisions of the Credit Agreement applicable to REIT including, without limitation, those
contained in §7.12 of the Credit Agreement. REIT’s assumption of the foregoing obligations (a) is absolute, unconditional and is not subject to any defenses, waivers, claims or offsets and (b) shall not be affected or impaired by
any agreement, condition, statement or representation of any person or entity. REIT expressly agrees that it has read, approved and will comply with and be bound by all of the terms, conditions, and provisions contained in the Credit Agreement and
the other Loan Documents applicable to REIT. For the avoidance of doubt, REIT is not assuming any of the Borrower’s Obligations under the Credit Agreement except as and to the extent provided in the Springing Guaranty. 

2. Representations and Warranties of REIT. REIT represents and warrants to Agent that, as of the Effective Date (as defined below),
except as disclosed in writing by REIT to Agent on or prior to the date hereof and approved by the Agent in writing, the representations and warranties contained in the Credit Agreement and the other Loan Documents are true and correct in all
material respects as applied to REIT on and as of the Effective Date (as defined below) as though made on that date. As of the Effective Date, all covenants and agreements in the Credit Agreement are true and correct with respect to REIT and no
Default or Event of Default shall exist or might exist upon the Effective Date REIT becomes a party to the Credit Agreement. 
 3. IPO
Event. Borrower and REIT acknowledge, represent and agree that the events relating to the IPO Event and restructuring of Borrower have been as set forth in Schedule 1 attached hereto and made a part hereof. 

4. No Waiver or Modification. This Joinder Agreement shall not constitute a waiver or modification of any requirement of obtaining
Agent and Lenders’ consent to any future ownership changes or any portion thereof or interest therein as required by the Credit Agreement , nor shall it constitute a modification of the terms, provisions, or requirements in the Loan Documents
in any respect except as expressly provided herein. REIT and Borrower specifically acknowledge that any subsequent assumption or transfer of any interest in REIT, Borrower and Guarantors in violation of the Loan Documents shall be a Default
thereunder. The Loan Documents are hereby ratified and, except as expressly modified in this Agreement, remain unmodified and are in full force and effect 

  
 EXHIBIT “F”
– PAGE 1 

 5. Further Assurances. This Agreement shall be deemed a “Loan Document” for all
purposes under the Loan Documents. REIT agrees to execute and deliver such other instruments and documents and take such other action, as the Agent may reasonably request, in connection with the transactions contemplated by this Joinder Agreement.

 6. GOVERNING LAW. THIS AGREEMENT SHALL BE DEEMED TO BE A CONTRACTUAL OBLIGATION UNDER, AND SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF GEORGIA. 
 7. Counterparts. This Agreement may be executed in any number of
counterparts which shall together constitute but one and the same agreement. 
 8. The effective date (the “Effective Date”) of
this Joinder Agreement is             , 20    . 
 [REMAINDER
OF PAGE INTENTIONALLY LEFT BLANK] 

  
 EXHIBIT “F”
– PAGE 2 

 IN WITNESS WHEREOF, REIT has executed this Joinder Agreement under seal as of the day and year
first above written. 
  

					
	“REIT”
	
	                                    
                                         
                     , a
	  
	 	
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	[SEAL]

  

					
	ACKNOWLEDGED:
	
	QUALITYTECH, LP, a Delaware limited partnership
		
	By:	 	                    , a     
                    , its general partner
			
		 	By:	 	  

		 	Name:	 	  

		 	Title:	 	  

	
	[SEAL]

  

			
	ACKNOWLEDGED:
	
	KEYBANK NATIONAL ASSOCIATION, as Agent
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	[SEAL]

  
 EXHIBIT “F”
– PAGE 3EX-10.46

 Exhibit 10.46 

SECOND AMENDMENT TO CREDIT AGREEMENT 

THIS SECOND AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) dated as of September 25, 2013, by and among QUALITY INVESTMENT
PROPERTIES RICHMOND, LLC, a Delaware limited liability company (“QIPR”), QUALITY TECHNOLOGY SERVICES RICHMOND II, LLC, a Delaware limited liability company (“QTS Richmond TRS”), QUALITYTECH, LP, a Delaware limited partnership
(“QTLP”), each of the Lenders party hereto, and REGIONS BANK, as Administrative Agent (the “Agent”). 
 WHEREAS, QIPR,
QTS Richmond TRS, QTLP, any Additional Subsidiary Borrowers from time to time a party thereto as “Borrowers” pursuant to §5.5, the Lenders, the Agent and certain other parties have entered into that certain Credit Agreement dated as
of December 21, 2012 (as amended and in effect immediately prior to the date hereof, the “Credit Agreement”); and 
 WHEREAS,
QIPR, QTS Richmond TRS, QTLP, the Lenders and the Agent desire to amend certain provisions of the Credit Agreement on the terms and conditions contained herein; 

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged by the parties hereto, the
parties hereto hereby agree as follows: 
 Section 1. Specific Amendments to Credit Agreement. 

(a) The Credit Agreement is amended by adding the following definitions of “REIT Joinder Agreement”, “Springing Guaranty”,
“Subsidiary General Partner” and “Tax Protection Agreement” to §1.1 in the correct alphabetical location: 

REIT Joinder Agreement. The Limited Joinder Agreement with respect to the Credit Agreement to be executed and delivered
by REIT pursuant to §7.26, such Limited Joinder Agreement to be in the form of Exhibit “F” hereto. 

Springing Guaranty. The Unconditional Guaranty of Payment and Performance to be executed and delivered by REIT and, if
applicable, Subsidiary General Partner, pursuant to §7.26, such Unconditional Guaranty of Payment and Performance to be in substantially the form of Exhibit “C” hereto, as the same may be modified, amended, restated or
ratified. 
 Subsidiary General Partner. After the occurrence of the IPO Event, if the REIT is not the general partner
of QTLP, a direct Wholly Owned Subsidiary of REIT that is the sole general partner of QTLP. 
 Tax Protection
Agreement. The Tax Protection Agreement made and entered into in connection with IPO Event by REIT, QTLP and each of parties identified as a signatory on Schedule 2.1(a) thereto as a “Protected Partner”, as the same may be further
varied, amended, restated, renewed, consolidated, extended or otherwise supplemented from time to time with the approval of Agent. 

 (b) The Credit Agreement is amended by restating the definitions of “Contribution
Agreement”, “Guarantors”, “Guaranty”, and “Loan Documents” set forth in §1.1 in their entireties as follows: 

Contribution Agreement. That certain Contribution Agreement dated of even date herewith among the QIPR, the Guarantors a
party thereto and each Additional Subsidiary Guarantor which may hereafter become a party thereto, as the same may be modified, amended or ratified from time to time. 

Guarantors. Collectively, QTLP and QTS Richmond TRS, together with any Additional Subsidiary Guarantor and, following
the occurrence of the IPO Event and execution of the Springing Guaranty, REIT (and, if applicable, Subsidiary General Partner). 

Guaranty. The Unconditional Guaranty of Payment and Performance dated of even date herewith given by the Guarantors a
party thereto and each Additional Subsidiary Guarantor which may hereafter become a party thereto to and for the benefit of Agent and the Lenders, as the same may be modified, amended, restated or ratified. 

Loan Documents. This Agreement, the Notes, the Guaranty, any Springing Guaranty, the REIT Joinder Agreement, the
Contribution Agreement, the Security Documents and all other documents, instruments or agreements now or hereafter executed or delivered by or on behalf of the Borrowers or the Guarantors in connection with the Loans. 

(c) The Credit Agreement is amended by restating §7.5(e) in its entirety as follows: 

(e) Tax Protection Agreement. QTLP shall notify the Agent and any Protected Partner (as defined in the Tax Protection
Agreement) in writing at any time it is required to provide an opportunity to any Protected Partner to either (i) guarantee Qualified Guarantee Indebtedness (as defined in the Tax Protection Agreement), or (ii) enter into a Deficit
Restoration Obligation (as defined in the Tax Protection Agreement) as required under Article 3 of the Tax Protection Agreement. Notwithstanding anything to the contrary contained in this Agreement including, without limitation §12.2(a), any
failure by QTLP to provide any such notice required under the Tax Protection Agreement shall constitute an Event of Default hereunder. 

(d) The Credit Agreement is amended by restating §7.17 in its entirety as follows: 

§7.17 Distributions of Income to QTLP. Parent Company shall cause all of its Subsidiaries (other than Subsidiary
General Partner) that are not Subsidiary Borrowers (subject to the terms of any loan documents under which such Subsidiary is the borrower) to promptly distribute to QTLP (but not less frequently than once each calendar quarter, unless otherwise
approved by the Agent), whether in the form of dividends, distributions or otherwise, its share of all profits, proceeds or other income relating to or arising from its Subsidiaries’ use, operation, financing, refinancing, sale or other
disposition of their respective assets and properties after (a) the payment by each Subsidiary of its debt service, operating expenses, capital improvements and leasing commissions for such quarter and (b) the establishment of reasonable
reserves for the payment of operating expenses not paid on at least a quarterly basis and capital improvements and tenant/licensee improvements to be made to such Subsidiary’s assets and properties approved by such Subsidiary in the course of
its business consistent with its past practices. 

  
 - 2 - 

 (e) The Credit Agreement is amended by restating §7.22 in its entirety as follows: 

§7.22 Power Generators. If any Borrower or Additional Subsidiary Guarantor has, or under applicable law is required
to maintain, a generator use permit, such Borrower or Additional Subsidiary Guarantor shall pay any fines with respect to its generator use permit in a timely manner and shall not allow any such permits to terminate due to non-payment of fines or
other defaults. 
 (f) The Credit Agreement is amended by restating §7.24 in its entirety as follows: 

§7.24 Covenants Regarding REIT and Subsidiary General Partner. From and after the creation of REIT, Borrowers shall cause REIT and,
if applicable, Subsidiary General Partner to comply with the following covenants: 
 (a) REIT shall not directly or
indirectly enter into or conduct any business other than in connection with the ownership, acquisition and disposition of interests in QTLP and, if applicable, the Subsidiary General Partner, and the management of the business of QTLP and, if
applicable, the Subsidiary General Partner, and such activities as are incidental thereto, all of which shall be solely in furtherance of the business of QTLP and, if applicable, the Subsidiary General Partner. REIT shall not own any assets other
than (i) interests, rights, options, warrants or convertible or exchangeable securities of QTLP and, if applicable, interests in the Subsidiary General Partner, (ii) up to a one percent (1%) equity interest in any partnership or
limited liability company at least ninety-nine percent (99%) of the equity of which is owned, directly or indirectly, by QTLP; (iii) assets that have been distributed to REIT by its Subsidiaries in accordance with §8.7 below that are
held for ten (10) Business Days or less (included within such time period shall be any time such assets are held by the Subsidiary General Partner, if applicable) pending further distribution to equity holders of REIT, (iv) assets received
by REIT from third parties (including, without limitation, the proceeds from any Equity Offering), that are held for ten (10) Business Days or less pending further contribution to QTLP, (v) such bank accounts or similar instruments as it
deems necessary to carry out its responsibilities under the limited partnership agreement of QTLP and (vi) other tangible and intangible assets that, taken as a whole, are de minimis in relation to the net assets of QTLP and its Subsidiaries
but which shall in no event include any Equity Interests other than those permitted in clauses (i) and (ii) of this subsection (a). 

(b) If QTLP and REIT create the Subsidiary General Partner for the purpose of being the sole general partner of QTLP, then the
Subsidiary General Partner shall not directly or indirectly enter into or conduct any business other than in connection with the ownership, acquisition and disposition of interests in QTLP, and the management of the business of QTLP, and such
activities as are incidental thereto, all of which shall be solely in furtherance of the business of QTLP. The Subsidiary General Partner shall not own any assets other than (i) interests, rights, options, warrants or convertible or
exchangeable securities of QTLP; (ii) up to a one percent (1%) equity interest in any partnership or limited liability company at least ninety-nine percent (99%) of the equity of which is owned, directly or indirectly, by QTLP;
(iii) assets that have been distributed to Subsidiary General Partner by its Subsidiaries in accordance 

  
 - 3 - 

 
with §8.7 below that are held for ten (10) Business Days or less pending further distribution to equity holders of REIT, (iv) assets received by Subsidiary General Partner from
third parties or by through REIT from third parties (including, without limitation, the proceeds from any Equity Offering), that are held for ten (10) Business Days or less (included within such time period shall be any time such assets are
held by REIT) pending further contribution to QTLP, (v) such bank accounts or similar instruments as it deems necessary to carry out its responsibilities under the limited partnership agreement of QTLP and (vi) other tangible and
intangible assets that, taken as a whole, are de minimis in relation to the net assets of QTLP and its Subsidiaries but which shall in no event include any Equity Interests other than those permitted in clauses (i) and (ii) of this
subsection (b). 
 (c) REIT and, if applicable, the Subsidiary General Partner, shall comply with its obligations under the
limited partnership agreement of QTLP, as amended from time to time. 
 (d) REIT, and if applicable, Subsidiary General
Partner, shall contribute or otherwise downstream to QTLP within ten (10) Business Days or less (included within such time period shall be any time such assets are held by REIT and, if applicable, the Subsidiary General Partner) any net assets
received by REIT, or if applicable, Subsidiary General Partner, from third parties (including, without limitation, the proceeds from any Equity Offering), except to the extent permitted by §7.24(a). 

(e) REIT and if, applicable, Subsidiary General Partner, shall not dissolve, liquidate or otherwise wind up its business,
affairs or assets. 
 (f) QTLP and each of the Borrowers will provide the Agent written notice within two (2) Business
Days in the event that QTLP or such Borrower becomes aware that REIT or, if applicable, Subsidiary General Partner, fails to comply with the terms and conditions of this §7.24. Notwithstanding anything to the contrary contained in this
Agreement including, without limitation §12.2(a), any failure by QTLP or any of the Borrowers to provide any such notice required under this §7.24(f) shall constitute an Event of Default hereunder. 

(g) Notwithstanding anything to the contrary contained in this Agreement, the failure of REIT and, if applicable, Subsidiary
General Partner, to comply with the terms and conditions of this §7.24 shall no longer be deemed a “Default,” and an Event of Default shall not be deemed to have occurred in the event that the Springing Recourse Event (as defined in
the Springing Guaranty) occurs. 
 (g) The Credit Agreement is amended by restating §7.26 in its entirety as follows: 

§7.26 Creation of REIT. As a condition to the occurrence of the IPO Event, the Borrowers and Guarantors agree, as follows: 

(a) Schedule 7.26 hereto sets forth the organizational structure of REIT and QTLP immediately following the IPO Event.
Agent and Lenders consent to such structure, with such changes as QTLP deems necessary, 

  
 - 4 - 

 
provided that simultaneously with the occurrence of the IPO Event (i) QTLP shall become an “operating partnership” which will own not less than 100% of the direct or indirect
interests in the Borrowers and each Additional Subsidiary Guarantor, (ii) the structure of the transaction shall be such that the financial results of QTLP and its Subsidiaries would be Consolidated with the accounts of REIT, and
(iii) REIT, or Subsidiary General Partner, shall be the sole general partner of QTLP, or with such other changes that the Agent shall approve, such approval not to be unreasonably withheld, conditioned or delayed; 

(b) all of the formation and contribution agreements related to the IPO Event shall be in form and substance reasonably
acceptable to Agent; 
 (c) If applicable, the Borrowers and Guarantors shall cause Subsidiary General Partner to execute
and deliver the Springing Guaranty and to provide Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other documents and instruments as Agent may reasonably require; 

(d) The Borrowers and Guarantors shall cause REIT to (i) execute and deliver the REIT Joinder Agreement to cause REIT to
be bound by the provisions of this Agreement applicable to REIT, (ii) execute and deliver the Springing Guaranty, and (iii) provide to Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other
documents and instruments as Agent may reasonably require in connection with the REIT Joinder Agreement and Springing Guaranty; and 

(e) the Borrowers, Guarantors (including REIT and, if applicable, Subsidiary General Partner) and the Agent shall enter into
such amendments to the Loan Documents or other agreements as the Agent may reasonably require to reflect a structure different from that set forth on Schedule 7.26 hereto. 

(h) The Credit Agreement is amended by inserting the following new §7.27 immediately after §7.26: 

§7.27 Subsidiary General Partner. Following the occurrence of the IPO Event, if QTLP and REIT desire to create the
Subsidiary General Partner for the purpose of being the sole general partner of QTLP, then, as a condition to the transfer of the general partner interest in QTLP to the Subsidiary General Partner, QTLP and REIT shall (a) cause the Subsidiary
General Partner to simultaneously execute and deliver the Springing Guaranty to Agent and the Lenders, and (b) provide Agent and the Lenders such organizational agreements, resolutions, consents, opinions and other documents and instruments as
Agent may reasonably require. 
 (i) The Credit Agreement is amended by restating §8.1(e) in its entirety as follows: 

(e) Indebtedness arising under, or in connection with, the Corporate Credit Agreement in an aggregate amount not to exceed $675,000,000 and
any Permitted Refinancing thereof; provided that neither the REIT nor, if applicable, the Subsidiary General Partner shall incur any Indebtedness under this clause (e) other than with respect to Indebtedness arising under any conditional or
springing guaranty executed with respect to the Corporate Credit Agreement or any Permitted Refinancing thereof which is in form and substance substantially the same as the Springing Guaranty; 

  
 - 5 - 

 (j) The Credit Agreement is amended by replacing the word “Borrower” in §8.1(g)
with the word “Borrowers”. 
 (k) The Credit Agreement is amended by inserting the parenthetical “(other than QTLP)”
after the words “Parent Company” in the thirteenth line of the last paragraph of §8.1. 
 (l) The Credit Agreement is amended
by restating §8.3(o) in its entirety as follows: 
 (o) Investments to consummate the organizational structure described
in §7.26(a) and the transactions contemplated by the formation and contribution agreements referenced in §7.26(b), and after the occurrence of the IPO Event, Investments contemplated by §7.27, in each case subject to the terms and
conditions provided in such Sections. 
 (m) The Credit Agreement is amended by inserting the following new clause (vii) after the
existing clause (vi) in §8.4: 
 and (vii) the restructurings contemplated by, and subject to the terms and
conditions provided in, §7.26(a) and (b) and §7.27. 
 (n) The Credit Agreement is amended by inserting the words “the
Obligations with any other” before the word “Indebtedness” in §8.9. 
 (o) The Credit Agreement is amended by restating
§12.1(d) in its entirety as follows: 
 (d) any of the Borrowers, the Guarantors or any of their respective Subsidiaries
shall fail to perform any other term, covenant or agreement contained in §7.5(e), §7.24(f), §7.25, §9.2, §9.3, §9.4, §9.5, §9.6, §9.7 or §9.8; 

(p) The Credit Agreement is amended by deleting the word “or” after §12.1(r), inserting the word “or” after the
semicolon in §12.1(s), and inserting the following clause (t) after §12.1 (s): 
 (t) REIT or, if applicable,
Subsidiary General Partner, fails to perform any term, covenant or agreement contained in §7.24, §7.26 or §7.27 which they are required to perform; 

(q) The Credit Agreement is amended by inserting the following sentence at the end of §15: 

Notwithstanding anything to the contrary contained in this §15, REIT and, if applicable, Subsidiary General Partner shall not have any
expense reimbursement obligations in this §15 except as and to the extent provided in the Springing Guaranty. 

  
 - 6 - 

 (r) The Credit Agreement is amended by deleting the word “and” before clause
(h) of §16, inserting a comma at the end of clause (h) of §16 and inserting the following clause (i) immediately after such comma and before the semicolon: 

(i) the acceptance by Agent and the Lenders of any Investor Guaranties pursuant to §34 

(s) The Credit Agreement is amended by inserting the following sentence at the end of §16: 

Notwithstanding anything to the contrary contained in this §16, REIT and, if applicable, Subsidiary General Partner shall not have any
indemnification obligations in this §16 except as and to the extent provided in the Springing Guaranty. 
 (t) The Credit Agreement is
amended by restating the address for notices to the Agent of Regions in §19 as follows: 
 If to the Agent or Regions: 

Regions Bank 
 Real Estate
Corporate Banking 
 6805 Morrison Boulevard 

Charlotte, North Carolina 28211 

Attn: Kerri Raines 
 Telecopy No.:
(704) 362-3594 
 With a copy to: 

Regions Bank 
 c/o Regions Capital
Markets 
 3050 Peachtree Rd NW, Suite 400 

Atlanta, Georgia 30305 
 Attn:
Syndicate Services 
 Telecopy No.: (404) 279-7474 

(u) The Credit Agreement is amended by restating §34 in its entirety as follows: 

§34. INVESTOR GUARANTIES. 

As an accommodation to the Borrowers, the Agent and the Lenders have agreed to accept from time to time, upon the request of
Borrowers, guaranties from certain Persons who are shareholders, members, partners or affiliates of the Borrowers, the REIT or QTLP (such Persons are hereinafter referred to as the “Investor Guarantors”, and such guaranties are hereinafter
referred to individually as the “Investor Guaranty” and collectively as the “Investor Guaranties”); provided that the aggregate principal amount of the Obligations guaranteed by the Investor Guarantors shall not exceed
$150,000,000.00. The form of each Investor Guaranty shall be subject to the prior approval of Agent, which consent shall not be unreasonably withheld, delayed or conditioned. No Investor Guarantor shall be a Person with whom the Agent or any Lender
is prohibited by applicable law from doing business with, including without limitation, by virtue of OFAC. The Borrowers shall deliver to the Agent such information as the Agent may reasonably request to verify the foregoing. Without limiting the
foregoing, no event or circumstance which shall occur with respect to any of such Investor Guarantors, nor any act or omission by the Agent or any of the Lenders 

  
 - 7 - 

 
with respect to any of the Investor Guarantors or the Investor Guaranties, shall in any event limit, impair or otherwise affect the liability of the Borrowers or Guarantors to the Agent and the
Lenders under this Agreement and the other Loan Documents, and the Borrowers and Guarantors hereby waive and agree not to assert or take advantage of any defense based thereon. The Agent may at any time in its sole discretion, but only with the
consent of the respective Investor Guarantor or in accordance with the terms of the applicable Investor Guaranty (provided that consent of such Investor Guarantor shall not be required as a condition to the Agent and the Lenders accepting any
payments or prepayments of the Obligations, or otherwise dealing with the Loan or the Loan Documents), release any Investor Guarantor from its Investor Guaranty without affecting the liability of the Borrowers or Guarantors under the Loan Documents.

 (v) The Credit Agreement is amended by restating §35 in its entirety as follows: 

Except to the extent set forth in the Springing Guaranty and subject to the limitations described below, the Obligations of the
Borrowers under this Agreement are non-recourse to the REIT and, if applicable, the Subsidiary General Partner, and payable only out of cash flow and assets of the Borrowers and the other Guarantors. Agent, the Lenders and the Lender Hedge Providers
agree that neither the REIT, a Subsidiary General Partner, if applicable, nor their assets shall be liable for any of the Obligations of the Borrowers under this Agreement as a result of their status as a general partner of the QTLP. Notwithstanding
the foregoing, (a) if an Event of Default occurs, nothing in this §35 shall in any way prevent or hinder the Agent or the Lenders in the pursuit or enforcement of any right, remedy, or judgment against the Borrowers or any of the other
Guarantors, or any of their respective assets; (b) the REIT and, if applicable, the Subsidiary General Partner, shall be fully liable to the Agent and the Lenders to the same extent that REIT, and if applicable, the Subsidiary General Partner,
would be liable absent the foregoing provision of this §35 for fraud or willful misrepresentation by any of the Borrowers, REIT, the Subsidiary General Partner, if any, or any of their respective Affiliates or Subsidiaries (to the full extent
of losses suffered by the Agent or any Lender by reason of such fraud or willful misrepresentation); and (c) nothing in this §35 shall be deemed to be a waiver of any right which Agent may have under §506(a), 506(b), 1111(b) or any
other provision of the Bankruptcy Code or any successor thereto or similar provisions under applicable state law to file a claim against the Borrowers or any of the other Guarantors for the full amount of the Obligations. 

(w) The Credit Agreement is amended by replacing “Exhibit C” of the Credit Agreement with the “Exhibit C”
attached hereto. 
 (x) The Credit Agreement is amended by replacing “Exhibit F” of the Credit Agreement with the
“Exhibit F” attached hereto. 
 Section 2. Conditions Precedent. The effectiveness of this Amendment is subject
to receipt by the Agent of each of the following, each in form and substance satisfactory to the Agent: 
 (a) A counterpart of this
Amendment duly executed by QIPR, QTS Richmond TRS, QTLP and Requisite Lenders; and 
 (b) Such other documents, instruments and agreements
as the Agent may reasonably request. 

  
 - 8 - 

 Section 3. Representations. Each Borrower represents and warrants to the Agent and
each Lender as follows: 
 (a) Authorization. Each of QIPR, QTS Richmond TRS, and QTLP has the right and power, and has taken all
necessary action to authorize the execution and delivery of this Amendment and to perform its obligations hereunder and under the Credit Agreement, as amended by this Amendment, in accordance with their respective terms. This Amendment has been duly
executed and delivered by the duly authorized officers of QIPR, QTS Richmond TRS and a duly authorized officer of the general partner of QTLP and each of this Amendment and the Credit Agreement, as amended by this Amendment, is a legal, valid and
binding obligation of QIPR, QTS Richmond TRS, and QTLP enforceable against QIPR, QTS Richmond TRS, and QTLP in accordance with its respective terms except as the same may be limited by bankruptcy, insolvency, and other similar laws affecting the
rights of creditors generally and the availability of equitable remedies for the enforcement of certain obligations (other than the payment of principal) contained herein or therein and as may be limited by equitable principles generally. 

(b) Compliance with Laws, etc. The execution and delivery by QIPR, QTS Richmond TRS, and QTLP of this Amendment and the performance by
each of QIPR, QTS Richmond TRS, and QTLP of this Amendment and the Credit Agreement, as amended by this Amendment, in accordance with their respective terms, do not and will not, by the passage of time, the giving of notice or otherwise:
(i) require the approval or consent of, or filing or registration with, or the giving of any notice to, any court, department, board, governmental agency or authority; (ii) conflict with or result in any breach or contravention of any
provision of law, statute, rule or regulation to which such Person is subject or any judgment, order, writ, injunction, license or permit applicable to any such Person, (iv) conflict with or constitute a default (whether with the passage of
time or the giving of notice, or both) under any provision of the partnership agreement, articles of incorporation or other charter documents or bylaws of, or any material agreement or other instrument binding upon, any such Person or any of its
properties, (v) result in or require the imposition of any lien or other encumbrance on any of the properties, assets or rights of any such Person other than the liens and encumbrances in favor of Agent contemplated by the Credit Agreement and
the other Loan Documents. 
 (c) No Default. No Default or Event of Default has occurred and is continuing as of the date hereof or
will exist immediately after giving effect to this Amendment. 
 Section 4. Reaffirmation of Representations by Borrowers. Each
of QIPR, QTS Richmond TRS, and QTLP hereby repeats and reaffirms all representations and warranties made by such Person to the Agent and the Lenders in the Credit Agreement and the other Loan Documents to which it is a party on and as of the date
hereof with the same force and effect as if such representations and warranties were set forth in this Amendment in full. 
 Section 5.
Certain References. Each reference to the Credit Agreement in any of the Loan Documents shall be deemed to be a reference to the Credit Agreement as amended by this Amendment. This Amendment shall constitute a Loan Document. 

Section 6. Expenses. The Borrowers shall reimburse the Agent upon demand for all reasonable out-of-pocket costs and expenses
(including attorneys’ fees) actually incurred by the Agent in connection with the preparation, negotiation and execution of this Amendment and the other agreements and documents executed and delivered in connection herewith. 

  
 - 9 - 

 Section 7. Benefits. This Amendment shall be binding upon and shall inure to the
benefit of the parties hereto and their respective successors and assigns. 
 Section 8. GOVERNING LAW. THIS AMENDMENT SHALL BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK. 
 Section 9. Effect. Except as expressly
herein amended, the terms and conditions of the Credit Agreement and the other Loan Documents remain in full force and effect, and this Amendment shall not limit, impair or constitute a waiver of the rights, powers or remedies available to the
Lenders under the Credit Agreement or any other Loan Document. The amendments contained herein shall be deemed to have prospective application only. 

Section 10. Counterparts. This Amendment may be executed in any number of counterparts, each of which shall be deemed to be an
original and shall be binding upon all parties, their successors and assigns. 
 Section 11. Reaffirmation of Guaranty. Each of
QTLP and QTS Richmond TRS hereby reaffirms its continuing obligations to the Agent and the Lenders under that certain Unconditional Guaranty of Payment and Performance dated as of December 21, 2012, by an among QTLP and QTS Richmond TRS, each
Additional Subsidiary Guarantor from time to time party thereto, and Regions Bank (the “Guaranty”) and agrees that the transactions contemplated by the Amendment shall not in any way affect the validity and enforceability of the
Guaranty, or reduce, impair or discharge the obligations of such Person, in its capacity as a Guarantor, thereunder. 
 Section 12.
Waiver of Claims. Each of QIPR, QTS Richmond TRS, and QTLP acknowledges, represents and agrees that as of the date hereof it has no defenses, setoffs, claims, counterclaims or causes of action of any kind or nature whatsoever with respect to
the Loan Documents, the administration or funding of the Loans or with respect to any acts or omissions of Agent or any of the Lenders, or any past or present officers, agents or employees of Agent or any of the Lenders, and each of QIPR, QTS
Richmond TRS, and QTLP does hereby expressly waive, release and relinquish any and all such defenses, setoffs, claims, counterclaims and causes of action, if any. 

Section 13. Definitions. All capitalized terms not otherwise defined herein are used herein with the respective definitions given
them in the Credit Agreement. 
 [Signatures on Next Page] 

  
 - 10 - 

 IN WITNESS WHEREOF, the parties hereto have caused this Second Amendment to Credit Agreement to
be executed as of the date first above written. 
  

			
	QIPR:
	
	QUALITY INVESTMENT PROPERTIES RICHMOND, LLC, a Delaware limited liability company
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
	(SEAL)
	
	QTLP:
	
	QUALITYTECH, LP, a Delaware limited partnership
		
	By:	 	QualityTech GP, LLC, a Delaware limited liability company, its general partner
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
	(SEAL)
	
	QTS RICHMOND TRS:
	
	QUALITY TECHNOLOGY SERVICES RICHMOND II, LLC
		
	By:	 	 /s/ William H. Schafer

	Name:	 	William H. Schafer
	Title:	 	Chief Financial Officer
	(SEAL)

  
 [Signatures Continue on
Next Page] 

 [Signature Page to Second Amendment to Credit Agreement with Quality Investment Properties
Richmond, LLC et al.] 
  

					
	REGIONS BANK, as Agent and as a Lender
		
	By:	 	 /s/ Kerri L. Raines

		 	Name:	 	Kerri L. Raines
		 	Title:	 	Vice President

  
 [Signatures Continue on
Next Page] 

 [Signature Page to Second Amendment to Credit Agreement with Quality Investment Properties
Richmond, LLC et al.] 
  

					
	BANK OF AMERICA, N.A.
		
	By:	 	 /s/ David J. Popp

		 	Name:	 	David J. Popp
		 	Title:	 	AVP

 [Signature Page to Second Amendment to Credit Agreement with Quality Investment Properties Richmond, LLC et
al.] 
  

					
	 CATERPILLAR FINANCIAL SERVICES CORPORATION

		
	By:	 	 /s/ Adam Brown

		 	Name:	 	Adam Brown
		 	Title:	 	Credit Manager

 EXHIBIT “C” 

FORM OF SPRINGING GUARANTY 

UNCONDITIONAL GUARANTY OF PAYMENT AND PERFORMANCE 

FOR AND IN CONSIDERATION OF the sum of Ten and No/100 Dollars ($10.00) and other good and valuable consideration paid or delivered to the
undersigned QTS REALTY TRUST, INC., a Maryland corporation (“REIT”), the receipt and sufficiency whereof are hereby acknowledged by REIT, and for the purpose of seeking to induce REGIONS BANK (hereinafter referred to as
“Lender”, which term shall also include each other Lender which may now be or hereafter become a party to the Credit Agreement, and shall also include any such individual Lender acting as agent for all of the Lenders), to extend credit or
otherwise provide financial accommodations to QUALITY INVESTMENT PROPERITES RICHMOND, LLC, a Delaware limited liability company (“QIPR) and each Additional Subsidiary Borrower (as defined in the Credit Agreement) that may become a party
to the Credit Agreement (QIPR and such Additional Subsidiary Borrowers are sometimes hereinafter referred to individually as a Borrower” and collectively as “Borrowers”) under the Credit Agreement, and seeking to induce the Lender
Hedge Providers to provide financial accommodations by entering into derivative contracts that may give rise to Hedge Obligations, which extension of credit and provision of financial accommodations will be to the direct interest, advantage and
benefit of REIT, REIT does, upon the occurrence of a Springing Recourse Event (as hereinafter defined), hereby, absolutely, unconditionally and irrevocably guarantee to Lender and the Lender Hedge Providers the complete payment and performance of
the following liabilities, obligations and indebtedness of Borrowers to Lender and the Lender Hedge Providers (hereinafter referred to collectively as the “Obligations”) (capitalized terms that are used herein that are not otherwise
defined herein shall have the meanings set forth in the Credit Agreement): 
 (a) the full and prompt payment when due, whether by
acceleration or otherwise, either before or after maturity thereof, of the Revolving Credit Notes in the aggregate principal face amount of Eighty Million and No/100 Dollars ($80,000,000) made by Borrowers to the order of certain of the Lenders,
which Revolving Credit Notes are increasable to $125,000,000.00 as provided in the Credit Agreement, together with interest as provided in the Revolving Credit Notes, and together with any replacements, supplements, renewals, modifications,
consolidations, restatements, increases and extensions thereof; and 
 (b) the full and prompt payment when due, whether by acceleration or
otherwise, either before or after maturity thereof, of each other note as may be issued under that certain Credit Agreement dated as of December 21, 2012 (as amended, restated, supplemented, or otherwise modified from time to time, the
“Credit Agreement”) among Borrowers, Regions Bank, for itself and as agent, and the other lenders now or hereafter a party thereto, together with interest as provided in each such note, together with any replacements, supplements,
renewals, modifications, consolidations, restatements, increases, and extensions thereof (the Revolving Credit Notes and each of the notes described in this subparagraph (b) are hereinafter referred to collectively as the “Note”); and

  
 EXHIBIT “C”
– PAGE 1 

 (c) the full and prompt payment and performance of any and all obligations of Borrowers to Lender
under the terms of the Credit Agreement, together with any replacements, supplements, renewals, modifications, consolidations, restatements, and extensions thereof; and 

(d) The full and prompt payment and performance of any and all obligations of Borrowers and Guarantors to Lender under the Security Documents,
together with any replacements, supplements, renewals, modifications, consolidations, restatement, and extensions thereof; and 
 (e) the
full and prompt payment and performance of each and all of the Hedge Obligations; and 
 (f) the full and prompt payment and performance of
any and all other obligations of Borrowers to Lender under any other agreements, documents or instruments now or hereafter evidencing, securing or otherwise relating to the indebtedness evidenced by the Note or the Credit Agreement (the Note, the
Credit Agreement, the Security Documents and said other agreements, documents and instruments are hereinafter collectively referred to as the “Loan Documents” and individually referred to as a “Loan Document”). Without limiting
the generality of the foregoing, REIT acknowledges the terms of §2.11 of the Credit Agreement pursuant to which the Total Commitment under the Credit Agreement may be increased to up to $125,000,000.00 and agree that this Unconditional Guaranty
of Payment and Performance (this “Guaranty”) shall extend and be applicable to each new or replacement note delivered by any Borrower in connection with any such increase of the Total Commitment and all other obligations of Borrowers under
the Loan Documents as a result of such increase without notice to or consent from REIT. 
 Notwithstanding anything to the contrary
contained herein, under no circumstances shall any of the “Obligations” guaranteed hereby include any obligation that constitutes an Excluded Hedge Obligation of REIT. 

1. Agreement to Pay and Perform; Costs of Collection. Upon the occurrence of (a) REIT’s failure to perform any term, covenant
or agreement contained in §7.24 of the Credit Agreement (each, an “Asset Covenant Breach”) and the passage of forty-five days (45) after either (i) any Borrower or REIT becomes aware of the Asset Covenant Breach, or
(ii) Agent notifies Borrowers in writing of any Asset Covenant Breach, (b) if, at any time, REIT guarantees, or otherwise becomes obligated in respect of, any Indebtedness (other than a conditional or springing guaranty on terms
substantially similar to the Springing Guaranty or Indebtedness permitted under §8.1(a), (b), (c), (d), (e) or (f)), (c) REIT (i) shall make an assignment for the benefit of creditors, or admit in writing its general inability to
pay or generally fail to pay its debts as they mature or become due, or shall petition or apply for the appointment of a trustee or other custodian, liquidator or receiver for it or any substantial part of its assets, (ii) shall commence any
case or other proceeding relating to it under any bankruptcy, reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or similar law of any jurisdiction, now or hereafter in effect, or (iii) shall take any
action to authorize or in furtherance of any of the foregoing, (d) a petition or application shall be filed for the appointment of a trustee or other custodian, liquidator or receiver of REIT or any substantial part of the REIT’s assets,
or a case or other proceeding shall be commenced against REIT under any bankruptcy, reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or 

  
 EXHIBIT “C”
– PAGE 2 

 
similar law of any jurisdiction, now or hereafter in effect, and REIT shall indicate its approval thereof, consent thereto or acquiescence therein or such petition, application, case or
proceeding shall not have been dismissed within sixty (60) days following the filing or commencement thereof, (e) a decree or order is entered appointing a trustee, custodian, liquidator or receiver for REIT or adjudicating REIT, bankrupt
or insolvent, or approving a petition in any such case or other proceeding, or a decree or order for relief is entered in respect of REIT in an involuntary case under federal bankruptcy laws as now or hereafter constituted (each of 1(a), 1(b), 1(c),
1(d) and 1(e) of this Guaranty being referred to as a “Springing Recourse Event”), then REIT does hereby agree that following and during the continuance of an Event of Default under the Loan Documents if the Note is not paid by Borrowers
in accordance with its terms, or if any and all sums which are now or may hereafter become due from Borrowers to Lender under the Loan Documents are not paid by Borrowers in accordance with their terms, or if any and all other obligations of
Borrowers to Lender under the Note or of Borrowers, any other Guarantor under the other Loan Documents are not performed by Borrowers, or any other Guarantor, as applicable, in accordance with their terms, REIT will immediately upon demand make such
payments and perform such obligations. Upon the occurrence of a Springing Recourse Event, REIT further agrees to pay Lender on demand all reasonable costs and expenses (including court costs and reasonable attorneys’ fees and disbursements)
paid or incurred by Lender in endeavoring to collect the Obligations guaranteed hereby, to enforce any of the Obligations of Borrowers guaranteed hereby, or any portion thereof, or to enforce this Guaranty, and until paid to Lender, such sums shall
bear interest at the Default Rate unless collection from REIT of interest at such rate would be contrary to applicable law, in which event such sums shall bear interest at the highest rate which may be collected from REIT under applicable law. REIT
acknowledges and agrees that its guaranty of the Obligations guaranteed hereunder shall automatically become fully effective upon a Springing Recourse Event and no other documentation shall be required to evidence same. 

2. Reinstatement of Refunded Payments. If, for any reason, any payment to Lender of any of the Obligations guaranteed hereunder is
required to be refunded by Lender to any Borrower, or paid or turned over to any other Person, including, without limitation, by reason of the operation of bankruptcy, reorganization, receivership or insolvency laws or similar laws of general
application relating to creditors’ rights and remedies now or hereafter enacted, REIT agrees to pay to the Lender on demand an amount equal to the amount so required to be refunded, paid or turned over (the “Turnover Payment”), the
obligations of REIT shall not be treated as having been discharged by the original payment to Lender giving rise to the Turnover Payment, and this Guaranty shall be treated as having remained in full force and effect for any such Turnover Payment so
made by Lender, as well as for any amounts not theretofore paid to Lender on account of such obligations. 
 3. Actions with Respect to
Obligations. REIT hereby consents and agrees that Lender may at any time, and from time to time, without thereby releasing REIT from any liability hereunder and without notice to or further consent from REIT or any other Person or entity, either
with or without consideration: release or surrender any lien or other security of any kind or nature whatsoever held by it or by any Person, firm or corporation on its behalf or for its account, securing any indebtedness or liability hereby
guaranteed; substitute for any collateral so held by it, other collateral of like kind, or of any kind; modify the terms of the Note or the Loan Documents; extend or renew the Note for any period; grant releases, compromises and

  
 EXHIBIT “C”
– PAGE 3 

 
indulgences with respect to the Note or the Loan Documents and to any Persons or entities now or hereafter liable thereunder or hereunder; release any other Guarantor, surety, endorser or
accommodation party of the Note or any other Loan Documents; or take or fail to take any action of any type whatsoever. No such action which Lender shall take or fail to take in connection with the Note or the Loan Documents, or any of them, or any
security for the payment of the indebtedness of any Borrower to Lender or for the performance of any obligations or undertakings of any Borrower, REIT or other Guarantor, nor any course of dealing with any Borrower or any other Person, shall release
REIT’s obligations hereunder, affect this Guaranty in any way or afford REIT any recourse against Lender. The provisions of this Guaranty shall extend and be applicable to all replacements, supplements, renewals, amendments, extensions,
consolidations, restatements and modifications of the Note and the Loan Documents, and any and all references herein to the Note and the Loan Documents shall be deemed to include any such replacements, supplements, renewals, extensions, amendments,
consolidations, restatements or modifications thereof. Without limiting the generality of the foregoing, REIT acknowledges the terms of §18.3 of the Credit Agreement and agrees that this Guaranty shall extend and be applicable to each new or
replacement note delivered by Borrowers pursuant thereto without notice to or further consent from REIT. 
 4. No Contest with Lender;
Subordination. So long as any of the Obligations hereby guaranteed remain unpaid or undischarged or any Lender has any obligation to make Loans or issue Letters of Credit, REIT will not, by paying any sum recoverable hereunder (whether or not
demanded by Lender) or by any means or on any other ground, claim any set-off or counterclaim against any Borrower in respect of any liability of REIT to any Borrower or, in proceedings under federal bankruptcy law or insolvency proceedings of any
nature, prove in competition with Lender in respect of any payment hereunder or be entitled to have the benefit of any counterclaim or proof of claim or dividend or payment by or on behalf of any Borrower or the benefit of any other security for any
of the Obligations hereby guaranteed which, now or hereafter, Lender may hold or in which it may have any share. REIT hereby expressly waives any right of contribution from or indemnity against any Borrower or any other Guarantor, whether at
law or in equity, arising from any payments made by REIT pursuant to the terms of this Guaranty, and REIT acknowledges that REIT has no right whatsoever to proceed against any Borrower or any other Guarantor for reimbursement of any such payments.
In connection with the foregoing, REIT expressly waives any and all rights of subrogation to Lender against any Borrower or any other Guarantor, and REIT hereby waives any rights to enforce any remedy which Lender may have against any Borrower or
any other Guarantor and any rights to participate in any collateral for any Borrower’s obligations under the Loan Documents. REIT hereby subordinates any and all indebtedness of any Borrower now or hereafter owed to REIT to all indebtedness of
any Borrower or any other Guarantor to Lender, and agrees with Lender that (a) REIT shall not demand or accept any payment from any Borrower or any other Guarantor on account of such indebtedness, (b) REIT shall not claim any offset or
other reduction of REIT’s obligations hereunder because of any such indebtedness, and (c) REIT shall not take any action to obtain any interest in any of the security, if any, described in and encumbered by the Loan Documents because of
any such indebtedness; provided, however, that, if Lender so requests, such indebtedness shall be collected, enforced and received by REIT as trustee for Lender and be paid over to Lender on account of the indebtedness of any Borrower to Lender, but
without reducing or affecting in any manner the liability of REIT under the other provisions of this Guaranty except to the extent the principal amount or other portion of such outstanding indebtedness shall have been reduced by such payment. 

  
 EXHIBIT “C”
– PAGE 4 

 5. Waiver of Defenses. REIT hereby agrees that its obligations hereunder shall not be
affected or impaired by, and hereby waives and agrees not to assert or take advantage of any defense based on: 
 (a) (i) any change in the
amount, interest rate or due date or other term of any of the obligations hereby guaranteed, (ii) any change in the time, place or manner of payment of all or any portion of the obligations hereby guaranteed, (iii) any amendment or waiver
of, or consent to the departure from or other indulgence with respect to, the Credit Agreement, any other Loan Document, or any other document or instrument evidencing or relating to any obligations hereby guaranteed, or (iv) any waiver,
renewal, extension, addition, or supplement to, or deletion from, or any other action or inaction under or in respect of, the Credit Agreement, any of the other Loan Documents, or any other documents, instruments or agreements relating to the
obligations hereby guaranteed or any other instrument or agreement referred to therein or evidencing any obligations hereby guaranteed or any assignment or transfer of any of the foregoing; 

(b) any subordination of the payment of the obligations hereby guaranteed to the payment of any other liability of any Borrower, any other
Guarantor or any other Person; 
 (c) any act or failure to act by any Borrower or any other Person which may adversely affect REIT’s
subrogation rights, if any, against any Borrower, any other Guarantor or any other Person to recover payments made under this Guaranty; 

(d) any nonperfection or impairment of any security interest or other Lien on any collateral, if any, securing in any way any of the
obligations hereby guaranteed; 
 (e) any application of sums paid by any Borrower or any other Person with respect to the liabilities of
Lender, regardless of what liabilities of the Borrowers remains unpaid; 
 (f) any defense of any Borrower, including without limitation,
the invalidity, illegality or unenforceability of any of the Obligations; 
 (g) either with or without notice to REIT, any renewal,
extension, modification, amendment or other changes in the Obligations, including but not limited to any material alteration of the terms of payment or performance of the Obligations; 

(h) any statute of limitations in any action hereunder or for the collection of the Note or for the payment or performance of any obligation
hereby guaranteed; 
 (i) the incapacity, lack of authority, death or disability of any Borrower or any other Person or entity, or the
failure of Lender to file or enforce a claim against the estate (either in administration, bankruptcy or in any other proceeding) of any Borrower, REIT, any other Guarantor or any other Person or entity; 

(j) the dissolution or termination of existence of any Borrower, REIT, any other Guarantor or any other Person or entity; 

  
 EXHIBIT “C”
– PAGE 5 

 (k) the voluntary or involuntary liquidation, sale or other disposition of all or substantially
all of the assets of any Borrower, REIT, any other Guarantor or any other Person or entity; 
 (l) the voluntary or involuntary
receivership, insolvency, bankruptcy, assignment for the benefit of creditors, reorganization, assignment, composition, or readjustment of, or any similar proceeding affecting, any Borrower, REIT any other Guarantor or any other Person or entity, or
any of Borrower’s, REIT’s or any other Guarantor’s or any other Person’s or entity’s properties or assets; 
 (m)
the damage, destruction, condemnation, foreclosure or surrender of all or any part of the Real Estate or any of the improvements located thereon; 

(n) the failure of Lender to give notice of the existence, creation or incurring of any new or additional indebtedness or obligation of any
Borrower or of any action or nonaction on the part of any other Person whomsoever in connection with any obligation hereby guaranteed; 

(o) any failure or delay of Lender to commence an action against any Borrower or any other Person, to assert or enforce any remedies against
any Borrower under the Note or the other Loan Documents, or to realize upon any security; 
 (p) any failure of any duty on the part of
Lender to disclose to REIT any facts it may now or hereafter know regarding any Borrower (including, without limitation any Borrower’s financial condition), any other Guarantor or any other Person, any collateral, or any other assets or
liabilities of such Persons, whether such facts materially increase the risk to REIT or not (it being agreed that REIT assumes responsibility for being informed with respect to such information); 

(q) failure to accept or give notice of acceptance of this Guaranty by Lender; 

(r) failure to make or give notice of presentment and demand for payment of any of the indebtedness or performance of any of the obligations
hereby guaranteed; 
 (s) failure to make or give protest and notice of dishonor or of default to REIT or to any other party with respect to
the indebtedness or performance of obligations hereby guaranteed; 
 (t) any and all other notices whatsoever to which REIT might otherwise
be entitled; 
 (u) any lack of diligence by Lender in collection, protection or realization upon any collateral securing the payment of the
indebtedness or performance of obligations hereby guaranteed; 
 (v) the invalidity or unenforceability of the Note, or any of the other
Loan Documents, or any assignment or transfer of the foregoing; 
 (w) the compromise, settlement, release or termination of any or all of
the obligations of Borrowers under the Note or the other Loan Documents or the Hedge Obligations; 

  
 EXHIBIT “C”
– PAGE 6 

 (x) any transfer by any Borrower or any other Person of all or any part of the security, if any,
encumbered by the Loan Documents; 
 (y) the failure of Lender to perfect any security or to extend or renew the perfection of any security;
or 
 (z) to the fullest extent permitted by law, any other legal, equitable or surety defenses whatsoever to which REIT might otherwise be
entitled, it being the intention that the obligations of REIT hereunder are absolute, unconditional and irrevocable. 
 REIT understands
that the exercise by Lender of certain rights and remedies may affect or eliminate Guarantor’s right of subrogation against a Borrower, individually, the Borrowers, collectlively, or the other Guarantors and that REIT may therefore incur
partially or totally nonreimbursable liability hereunder. Nevertheless, REIT hereby authorizes and empowers Lender, its successors, endorsees and assigns, to exercise in its or their sole discretion, any rights and remedies, or any combination
thereof, which may then be available, it being the purpose and intent of REIT that the obligations hereunder shall, upon the occurrence of a Springing Recourse Event, be absolute, continuing, independent and unconditional under any and all
circumstances. Notwithstanding any other provision of this Guaranty to the contrary, REIT hereby waives and releases any claim or other rights which REIT may now have or hereafter acquire against any Borrower or any other Guarantor or other Person
of all or any of the obligations of REIT hereunder that arise from the existence or performance of REIT’s obligations under this Guaranty or any of the other Loan Documents, including, without limitation, any right of subrogation,
reimbursement, exoneration, contribution or indemnification, any right to participate in any claim or remedy of Lender against any Borrower or any other Guarantor or other Person or any collateral which Lender now has or hereafter acquires, whether
or not such claim, remedy or right arises in equity or under contract, statute or common law, by any payment made hereunder or otherwise, including, without limitation, the right to take or receive from any Borrower or any other Guarantor, directly
or indirectly, in cash or other property or by setoff or in any other manner, payment or security on account of such claim or other rights, except for those rights of other Guarantors under the Contribution Agreement. 

6. Guaranty of Payment and Performance and Not of Collection. This is a guaranty of payment and performance and not of collection. Upon
the occurrence of a Springing Recourse Event, the liability of REIT under this Guaranty shall be primary, direct and immediate and not conditional or contingent upon the pursuit of any remedies against any Borrower or any other Person, nor against
securities or liens available to Lender, its successors, successors in title, endorsees or assigns. REIT hereby waives any right to require that an action be brought against any Borrower or any other Person or to require that resort be had to any
security or to any balance of any deposit account or credit on the books of Lender in favor of any Borrower or any other Person. 
 7.
Rights and Remedies of Lender. In the event of an Event of Default under the Note or the Loan Documents, or any of them, that is continuing (it being understood that the Lender has no obligation to accept cure after an Event of Default
occurs), Lender shall have the right to enforce its rights, powers and remedies thereunder or hereunder or under any other Loan Document, in any order, and all rights, powers and remedies available to Lender in such event shall be nonexclusive and
cumulative of all other rights, powers and remedies provided 

  
 EXHIBIT “C”
– PAGE 7 

 
thereunder or hereunder or by law or in equity. Accordingly, REIT hereby authorizes and empowers Lender upon the occurrence and during the continuance of any Event of Default under the Note or
the Loan Documents, at its sole discretion, and without notice to REIT, to exercise any right or remedy which Lender may have, including, but not limited to, judicial foreclosure, exercise of rights of power of sale, acceptance of a deed or
assignment in lieu of foreclosure, appointment of a receiver to collect rents and profits, exercise of remedies against personal property, or enforcement of any assignment of leases, as to any security, whether real, personal or intangible. At any
public or private sale of any security or collateral for any of the Obligations guaranteed hereby, whether by foreclosure or otherwise, Lender may, in its discretion, purchase all or any part of such security or collateral so sold or offered for
sale for its own account and may apply against the amount bid therefor all or any part of the balance due it pursuant to the terms of the Note or any other Loan Document without prejudice to Lender’s remedies hereunder against REIT for
deficiencies. If the Obligations guaranteed hereby are partially paid by reason of the election of Lender to pursue any of the remedies available to Lender, or if such Obligations are otherwise partially paid, this Guaranty shall nevertheless remain
in full force and effect, and REIT shall, upon the occurrence of a Springing Recourse Event, remain liable for the entire balance of the Obligations guaranteed hereby even though any rights which REIT may have against any Borrower or any other
Person may be destroyed or diminished by the exercise of any such remedy. 
 8. Application of Payments. REIT hereby authorizes
Lender, without notice to REIT, to apply all payments and credits received from any Borrower, REIT, any other Guarantor or any other Person or realized from any security in such manner and in such priority as Lender in its sole judgment shall see
fit to the Obligations. 
 9. Business Failure, Bankruptcy or Insolvency. In the event of the business failure of REIT or if there
shall be pending any bankruptcy or insolvency case or proceeding with respect to REIT under federal bankruptcy law or any other applicable law or in connection with the insolvency of REIT, or if a liquidator, receiver, or trustee shall have been
appointed for REIT or REIT’s properties or assets, Lender may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of Lender allowed in any proceedings relative to REIT, or any of
REIT’s properties or assets, and, irrespective of whether the indebtedness or other obligations of Borrowers guaranteed hereby shall then be due and payable, by declaration or otherwise, Lender shall be entitled and empowered to file and prove
a claim for the whole amount of any sums or sums owing with respect to the indebtedness or other obligations of Borrowers guaranteed hereby, and to collect and receive any moneys or other property payable or deliverable on any such claim. REIT
covenants and agrees that upon the commencement of a voluntary or involuntary bankruptcy proceeding by or against any Borrower, REIT shall not seek a supplemental stay or otherwise pursuant to 11 U.S.C. §105 or any other provision of the
Bankruptcy Code, as amended, or any other debtor relief law (whether statutory, common law, case law, or otherwise) of any jurisdiction whatsoever, now or hereafter in effect, which may be or become applicable, to stay, interdict, condition, reduce
or inhibit the ability of Lender to enforce any rights of Lender against REIT by virtue of this Guaranty or otherwise. 
 10. Covenants
of REIT. REIT hereby covenants and agrees with Lender that until all indebtedness guaranteed hereby has been completely repaid and all obligations and undertakings of Borrowers under, by reason of, or pursuant to the Note and the other Loan
Documents have been completely performed and Lender has no further obligation to make Loans, REIT will comply with any and all covenants applicable to REIT set forth in the Credit Agreement. 

  
 EXHIBIT “C”
– PAGE 8 

 11. Rights of Set-off. In addition to any rights now or hereafter granted under any of the
other Loan Documents or applicable law and not by way of limitation of any such rights, REIT hereby grants to Lender, during the continuance of any Event of Default under the Note or the Loan Documents, at any time and without notice to REIT, the
right to set-off and apply the whole or any portion or portions of any or all deposits (general or specific, time or demand, provisional or final, regardless of currency, maturity, or the branch of Lender where the deposits are held) now or
hereafter held by Lender and other sums credited by or due from Lender to REIT or subject to withdrawal by REIT against amounts payable under this Guaranty, whether or not any other person or persons could also withdraw money therefrom. Any security
now or hereafter held by or for REIT and provided by any Borrower, or by anyone on any Borrower’s behalf, in respect of liabilities of REIT hereunder shall be held in trust for Lender as security for the liabilities of REIT hereunder. 

12. Changes in Writing; No Revocation. This Guaranty may not be changed orally, and no obligation of REIT can be released or waived by
Lender except as provided in §27 of the Credit Agreement. This Guaranty shall be irrevocable by REIT until all indebtedness guaranteed hereby has been completely repaid and all obligations and undertakings of Borrowers, REIT and other
Guarantors under, by reason of, or pursuant to the Note and the other Loan Documents have been completely performed and the Lenders have no further obligation to advance Loans under the Credit Agreement or issue Letters of Credit. 

13. Notices. Each notice, demand, election or request provided for or permitted to be given pursuant to this Guaranty (hereinafter in
this §13 referred to as “Notice”), but specifically excluding to the maximum extent permitted by law any notices of the institution or commencement of foreclosure proceedings, must be in writing and shall be deemed to have been
properly given or served by personal delivery or by sending same by overnight courier or by depositing same in the United States Mail, postpaid and registered or certified, return receipt requested, or as expressly permitted herein, by facsimile,
and addressed as follows: 
 The address of Lender is: 

Regions Bank 
 Real Estate
Corporate Banking 
 6805 Morrison Boulevard 

Charlotte, North Carolina 28211 

Attn: Kerri Raines 
 Facsimile
No.: (704) 362-3594 
 With a copy to: 

Regions Bank 
 c/o Regions Capital
Markets 
 3050 Peachtree Road, NW, Suite 400 

Atlanta, Georgia 30305 
 Attn:
Syndicate Services 
 Facsimile No.: (404) 279-7474 

  
 EXHIBIT “C”
– PAGE 9 

 The address of Guarantors is: 

c/o Quality Companies, LLC 
 12851
Foster Street, Suite 205 
 Overland Park, Kansas 66213 

Attn: CEO/President 
 Facsimile
No.: (913) 814-7766 
 With a copy to: 

c/o Quality Companies, LLC 
 12851
Foster Street, Suite 205 
 Overland Park, Kansas 66213 

Attn: Corporate Counsel 

Facsimile No.: (913) 814-7766 

With a copy to: 
 Stinson Morrison
Hecker LLP 
 1201 Walnut Street, Suite 2900 

Kansas City, Missouri 64106-2150 

Attn: Patrick J. Respeliers 

Facsimile No.: (816) 412-8174 

Each Notice shall be effective upon being personally delivered or upon being sent by overnight courier or upon being deposited in the United
States Mail as aforesaid, or if transmitted by facsimile is permitted, upon being sent and confirmation of receipt. The time period in which a response to such Notice must be given or any action taken with respect thereto (if any), however, shall
commence to run from the date of receipt if personally delivered or sent by overnight courier, or if so deposited in the United States Mail, the earlier of three (3) Business Days following such deposit or the date of receipt as disclosed on
the return receipt. Rejection or other refusal to accept or the inability to deliver because of changed address for which no notice was given shall be deemed to be receipt of the Notice sent. By giving at least fifteen (15) days’ prior
Notice thereof, Borrowers, REIT or Lenders shall have the right from time to time and at any time during the term of this Agreement to change their respective addresses and each shall have the right to specify as its address any other address within
the United States of America. 
 14. Governing Law. REIT ACKNOWLEDGES AND AGREES THAT THIS GUARANTY AND THE OBLIGATIONS OF REIT
HEREUNDER SHALL BE GOVERNED BY AND INTERPRETED AND DETERMINED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 

  
 EXHIBIT “C”
– PAGE 10 

 15. CONSENT TO JURISDICTION; WAIVERS. REIT HEREBY IRREVOCABLY AND UNCONDITIONALLY
(A) SUBMITS TO PERSONAL JURISDICTION IN THE STATE OF NEW YORKOVER ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS GUARANTY, AND (B) WAIVES ANY AND ALL PERSONAL RIGHTS UNDER THE LAWS OF ANY STATE (I) TO THE RIGHT, IF
ANY, TO TRIAL BY JURY (LENDER HAVING ALSO WAIVED SUCH RIGHT TO TRIAL BY JURY), (II) TO OBJECT TO JURISDICTION WITHIN THE STATE OF NEW YORK OR VENUE IN ANY PARTICULAR FORUM WITHIN THE STATE OF NEW YORK, AND (III) TO THE RIGHT, IF ANY, TO CLAIM OR
RECOVER ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES OTHER THAN OR IN ADDITION TO ACTUAL DAMAGES. EACH LENDER IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY AND ALL RIGHTS UNDER THE LAWS OF ANY STATE TO THE RIGHT, IF ANY, TO
TRIAL BY JURY. REIT HEREBY WAIVES ITS RIGHTS TO PERSONAL SERVICE AND AGREES THAT, IN ADDITION TO ANY METHODS OF SERVICE OF PROCESS PROVIDED FOR UNDER APPLICABLE LAW, ALL SERVICE OF PROCESS IN ANY SUCH SUIT, ACTION OR PROCEEDING MAY BE MADE BY
CERTIFIED OR REGISTERED MAIL, RETURN RECEIPT REQUESTED, DIRECTED TO REIT AT THE ADDRESS SET FORTH IN PARAGRAPH 13 ABOVE, AND SERVICE SO MADE SHALL BE COMPLETE FIVE (5) DAYS AFTER THE SAME SHALL BE SO MAILED. NOTHING CONTAINED HEREIN, HOWEVER,
SHALL PREVENT LENDER FROM BRINGING ANY SUIT, ACTION OR PROCEEDING OR EXERCISING ANY RIGHTS AGAINST ANY SECURITY, IF ANY, AND AGAINST REIT PERSONALLY, AND AGAINST ANY PROPERTY OF REIT, WITHIN ANY OTHER STATE. INITIATING SUCH SUIT, ACTION OR
PROCEEDING OR TAKING SUCH ACTION IN ANY STATE SHALL IN NO EVENT CONSTITUTE A WAIVER OF THE AGREEMENT CONTAINED HEREIN THAT THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THE RIGHTS AND OBLIGATIONS OF REIT AND LENDER HEREUNDER OR OF THE SUBMISSION
HEREIN MADE BY REIT TO PERSONAL JURISDICTION WITHIN THE STATE OF NEW YORK. REIT HEREBY WAIVES ANY OBJECTION THAT IT MAY NOW OR HEREAFTER HAVE TO THE VENUE OF ANY SUCH SUIT OR ANY SUCH COURT OR THAT SUCH SUIT IS BROUGHT IN AN INCONVENIENT COURT. REIT
CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY LENDER HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH LENDER WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVERS AND ACKNOWLEDGE THAT LENDER HAS BEEN INDUCED TO
ENTER INTO THIS GUARANTY AND THE OTHER LOAN DOCUMENTS TO WHICH THEY ARE PARTIES BY, AMONG OTHER THINGS, THE WAIVERS AND CERTIFICATIONS CONTAINED IN THIS PARAGRAPH 15. REIT ACKNOWLEDGES THAT IT HAS HAD AN OPPORTUNITY TO REVIEW THIS PARAGRAPH 15 WITH
ITS LEGAL COUNSEL AND THAT REIT AGREES TO THE FOREGOING AS ITS FREE, KNOWING AND VOLUNTARY ACT. 
 16. Successors and Assigns. The
provisions of this Guaranty shall be binding upon REIT and its successors, successors in title, legal representatives, and assigns, and shall inure to the benefit of Lender, its successors, successors in title, legal representatives and assigns and
the holders of the Hedge Obligations. REIT shall not assign or transfer any of its rights or obligations under this Guaranty without the prior written consent of Lender. 

  
 EXHIBIT “C”
– PAGE 11 

 17. Assignment by Lender. This Guaranty is assignable by Lender in whole or in part in
conjunction with any assignment of the Note or portions thereof, and any assignment hereof or any transfer or assignment of the Note or portions thereof by Lender shall operate to vest in any such assignee the rights and powers, in whole or in part,
as appropriate, herein conferred upon and granted to Lender. 
 18. Severability. If any term or provision of this Guaranty shall be
determined to be illegal or unenforceable, all other terms and provisions hereof shall nevertheless remain effective and shall be enforced to the fullest extent permitted by law. 

19. Disclosure. REIT agrees that in addition to disclosures made in accordance with standard banking practices, any Lender may disclose
information obtained by such Lender pursuant to this Guaranty to assignees or participants and potential assignees or participants hereunder subject to the terms of the Credit Agreement. 

20. No Unwritten Agreements. THIS GUARANTY REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE
OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. 
 21.
Time of the Essence. Time is of the essence with respect to each and every covenant, agreement and obligation of REIT under this Guaranty. 

22. Ratification. REIT does hereby restate, reaffirm and ratify each and every warranty and representation regarding REIT or its
Subsidiaries set forth in the Credit Agreement as if the same were more fully set forth herein. 
 23. Reserved. 

24. Fair Consideration. The REIT represents that the REIT is engaged in common business enterprises related to those of Borrowers and
REIT will derive substantial direct or indirect economic benefit from the effectiveness and existence of the Credit Agreement. 
 25.
Counterparts. This Guaranty and any amendment hereof may be executed in several counterparts and by each party on a separate counterpart, each of which when so executed and delivered shall be an original, and all of which together shall
constitute one instrument. In proving this Guaranty it shall not be necessary to produce or account for more than one such counterpart signed by the party against whom enforcement is sought. 

26. Condition of Borrowers. Without reliance on any information supplied by the Lender, REIT has independently taken, and will continue
to take, whatever steps it deems necessary to evaluate the financial condition and affairs of each Borrower, and the Lender shall not have any duty to advise REIT of information at any time known to the Lender regarding such financial condition or
affairs or any collateral, if any. 

  
 EXHIBIT “C”
– PAGE 12 

 [CONTINUED ON NEXT PAGE] 

  
 EXHIBIT “C”
– PAGE 13 

 IN WITNESS WHEREOF, REIT has executed this Guaranty as of this      day of
            , 20    . 
  

			
	REIT:
	
	QTS REALTY TRUST, INC., a Maryland corporation
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	(SEAL)

 [Signatures Continued on Next Page] 

  
 EXHIBIT “C”
– PAGE 14 

 Lender joins in the execution of this Guaranty for the sole and limited purpose of evidencing its
agreement to the waiver of the right to trial by jury contained in Paragraph 15 hereof. 
  

			
	REGIONS BANK,
	as Agent for the Lenders
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	(SEAL)

  
 15 

 EXHIBIT “F” 

FORM OF LIMITED JOINDER AGREEMENT 

THIS LIMITED JOINDER AGREEMENT (“Joinder Agreement”) is executed as of
            , 20    , by
                                        , a
                             (“REIT”), and delivered to REGIONS BANK, as Agent, pursuant to
§7.24 of the Credit Agreement dated as of December 21, 2012, as from time to time in effect (the “Credit Agreement”), among the Borrowers, Regions Bank, for itself and as Agent, and the other Lenders from time to time party
thereto and the other parties thereto. Terms used but not defined in this Joinder Agreement shall have the meanings defined for those terms in the Credit Agreement. 

RECITALS 
 A. As a
condition to the occurrence of the IPO Event, REIT is required, pursuant to §7.26 of the Credit Agreement, to become a party to the Credit Agreement in order to be bound by certain provisions thereof. 

B. REIT expects to realize direct and indirect benefits as a result of the availability to the Borrowers of the credit facilities under the
Credit Agreement. 
 NOW, THEREFORE, REIT agrees as follows: 

AGREEMENT 
 1.
Joinder. By this Joinder Agreement, REIT hereby becomes a party to the Credit Agreement. REIT hereby expressly assumes and agrees to be bound by those provisions of the Credit Agreement applicable to REIT including, without limitation, those
contained in §7.24 of the Credit Agreement. REIT’s assumption of the foregoing obligations (a) is absolute, unconditional and is not subject to any defenses, waivers, claims or offsets and (b) shall not be affected or impaired by
any agreement, condition, statement or representation of any person or entity. REIT expressly agrees that it has read, approved and will comply with and be bound by all of the terms, conditions, and provisions contained in the Credit Agreement and
the other Loan Documents applicable to REIT. For the avoidance of doubt, REIT is not assuming any of the Borrowers’ Obligations under the Credit Agreement except as and to the extent provided in the Springing Guaranty. 

2. Representations and Warranties of REIT. REIT represents and warrants to Agent that, as of the Effective Date (as defined below),
except as disclosed in writing by REIT to Agent on or prior to the date hereof and approved by the Agent in writing, the representations and warranties contained in the Credit Agreement and the other Loan Documents are true and correct in all
material respects as applied to REIT on and as of the Effective Date (as defined below) as though made on that date. As of the Effective Date, all covenants and agreements in the Credit Agreement are true and correct with respect to REIT and no
Default or Event of Default shall exist or might exist upon the Effective Date REIT becomes a party to the Credit Agreement. 

  
 EXHIBIT “F”
– PAGE 1 

 3. IPO Event. Quality Tech, LP (“QTLP”) and REIT acknowledge, represent and
agree that the events relating to the IPO Event and restructuring of QTLP have been as set forth in Schedule 1 attached hereto and made a part hereof. 

4. No Waiver or Modification. This Joinder Agreement shall not constitute a waiver or modification of any requirement of obtaining
Agent and Lenders’ consent to any future ownership changes or any portion thereof or interest therein as required by the Credit Agreement, nor shall it constitute a modification of the terms, provisions, or requirements in the Loan Documents in
any respect except as expressly provided herein. REIT and QTLP specifically acknowledge that any subsequent assumption or transfer of any interest in REIT, QTLP, Borrowers, and Guarantors in violation of the Loan Documents shall be a Default
thereunder. The Loan Documents are hereby ratified and, except as expressly modified in this Agreement, remain unmodified and are in full force and effect 

5. Further Assurances. This Agreement shall be deemed a “Loan Document” for all purposes under the Loan Documents. REIT
agrees to execute and deliver such other instruments and documents and take such other action, as the Agent may reasonably request, in connection with the transactions contemplated by this Joinder Agreement. 

6. GOVERNING LAW. THIS AGREEMENT SHALL BE DEEMED TO BE A CONTRACTUAL OBLIGATION UNDER, AND SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 7. Counterparts. This Agreement may be executed in any number of
counterparts which shall together constitute but one and the same agreement. 
 8. The effective date (the “Effective Date”) of
this Joinder Agreement is             , 20    . 
 [REMAINDER
OF PAGE INTENTIONALLY LEFT BLANK] 

  
 EXHIBIT “F”
– PAGE 2 

 IN WITNESS WHEREOF, REIT has executed this Joinder Agreement as of the day and year first above
written. 
  

							
	“REIT”
		
	  
	 	, a
	  
	 		 	
			
	By:	 	  
	 	
	Name:	 	  
	 	
	Title:	 	  
	 	
	
	[SEAL]

  

					
	ACKNOWLEDGED:
	
	QUALITYTECH, LP, a Delaware limited partnership
		
	By:	 	                    , a     
                    , its general partner
			
		 	By:	 	  

		 	Name:	 	  

		 	Title:	 	  

	
	[SEAL]

  

			
	ACKNOWLEDGED:
	
	REGIONS BANK, as Agent
		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	[SEAL]

  
 EXHIBIT “F”
– PAGE 3

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