Document:

Exchange Agreement, dated November 16, 2010

  
 Exhibit 4.1

 EXCHANGE AGREEMENT 
 This Exchange Agreement (this “Agreement”) is made this 16th day of November, 2010, by and among Digital Realty Trust, Inc., a Maryland corporation (the “Company”),
Digital Realty Trust, L.P., a Maryland limited partnership (the “Operating Partnership”), and Stifel, Nicolaus & Co., Inc., a Missouri corporation (the “Holder”). 

R E C I T A L S 

A. The Holder holds $2,300,000 in aggregate principal amount of the Operating Partnership’s 4.125% Exchangeable Senior Debentures
due 2026 (the “Notes”). 
 B. The Holder desires to sell to the Operating Partnership and the Operating
Partnership desires to purchase from the Holder $2,300,000 in aggregate principal amount of the Notes (the “Repurchased Notes”) in exchange for (i) 72,826 restricted shares (the “Shares”) of the Company’s
common stock, par value $0.01 per share, (ii) an incentive fee payable in cash equal to $15,125.00 and (iii) accrued and unpaid interest on the Repurchased Notes to but excluding the Closing Date (as hereinafter defined) equal to
$23,718.75 ((ii) and (iii) together, the “Cash Consideration”), upon the terms and subject to the conditions hereinafter set forth (the “Exchange”). 

NOW, THEREFORE, in consideration of the premises and the mutual agreements and obligations contained herein, the parties agree as
follows: 
 1. Purchase and Sale of the Repurchased Notes. 
 1.1 General. On the terms and subject to the conditions set forth in this Agreement and upon the representations and warranties made herein by each of the parties to the other, on the Closing Date
(i) the Holder shall convey, assign, transfer and deliver to the Operating Partnership, and the Operating Partnership shall purchase and acquire from the Holder, the Repurchased Notes, and (ii) in exchange, the Operating Partnership shall
deliver to the Holder the Shares and the Cash Consideration. 
 1.2 Closing. The closing of the transaction contemplated
hereby (the “Closing”) shall take place at 7:00 a.m., Pacific time, on November 16, 2010, at the offices of Latham & Watkins LLP, 505 Montgomery Street, Suite 2000, San Francisco, California 94111, or at such
other time and place as mutually agreed upon by the parties. The date and time of the closing are referred to herein as the “Closing Date”. 
 1.3 Closing Deliverables. 
 (a) At the Closing, the Holder shall deliver or
cause to be delivered to the account of the Operating Partnership the Repurchased Notes, registered in the name of the Holder or for which the Holder is the beneficial owner. 

  
 (b) At the Closing,
the Operating Partnership shall deliver the Shares to the Holder to the account set forth on Schedule A hereto. 
 (c) At
the Closing, the Operating Partnership shall deliver the Cash Consideration to the Holder by wire transfer in immediately available funds to the Holder pursuant to the wire transfer instructions set forth on Schedule A hereto. 

2. Representations and Warranties of the Holder. The Holder hereby represents and warrants to the Company, as of the Closing Date,
as follows: 
 2.1 Existence and Authority Relative to Agreement. The Holder is a corporation duly formed, validly
existing and in good standing under the laws of the state of Missouri. The Holder has all necessary power and authority to execute and deliver this Agreement and each other agreement, document or instrument to be executed in connection herewith and
to perform the obligations to be performed by it hereunder and thereunder. The execution, delivery and performance of this Agreement by the Holder and the sale of the Repurchased Notes by the Holder pursuant hereto have been duly authorized by all
necessary action. This Agreement and each other instrument or document to be executed in connection herewith have been duly and validly executed and delivered by a duly authorized officer of the Holder. This Agreement and each other instrument or
document to be executed in connection herewith shall, upon the execution and delivery thereof by the Holder, constitute the legal, valid and binding obligations of the Holder enforceable against the Holder in accordance with the respective terms
thereof, except as the enforceability thereof may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable principles. 

2.2 No Conflicts. Neither the execution, delivery and performance of this Agreement, nor the consummation of the transactions
contemplated hereby nor compliance by the Holder with any provisions hereof, will (i) violate (with or without the giving of notice or the lapse of time or both), or conflict with, or result in any violation of or default under, any indenture,
mortgage, deed of trust, loan agreement, joint venture agreement, partnership agreement, limited liability company agreement or any other agreement or instrument to which the Holder is a party or by which the Holder is bound or to which any of the
property or assets of the Holder is subject, except for such conflicts, breaches or violations which would not, singly or in the aggregate, result in a material adverse effect on the consolidated financial position, results of operations or business
of the Holder, (ii) result in any violation of the provisions of the charter, by-laws, certificate of limited partnership, partnership agreement or other organizational documents of the Holder, as the case may be, or (iii) result in any
violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Holder, except where such noncompliance or violation of any such statute, order, rule or regulation would not, singly
or in the aggregate, result in a material adverse effect on the consolidated financial position, results of operations or business of the Holder. 
 2.3 No Consents Required. No application, notice, order, registration, qualification, waiver, consent, approval or other action (collectively, “Consent”) is required to be filed,
given, obtained or taken by the Holder by virtue of the execution, delivery and performance of this Agreement or the consummation of the transactions contemplated hereby, which has not already been obtained. 

  
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 2.4 Title to
Interests. The Holder is the record or beneficial owner of the Repurchased Notes, and the sale of the Repurchased Notes to the Operating Partnership hereunder will transfer title to the Repurchased Notes free and clear of all liens, claims,
charges or encumbrances whatsoever. 
 2.5 Brokers and Finders. The Holder has not employed any broker or finder
who will seek compensation from the Company or the Operating Partnership, and the Holder has not otherwise entered into any arrangement regarding the payment of any brokerage fees, commissions or finder’s fees in connection with the sale of the
Repurchased Notes that will result in any liability on the part of the Company or the Operating Partnership. 
 2.6
Non-Foreign Status. The Holder is not a “foreign person” as defined in Section 1445(f)(3) of the Internal Revenue Code of 1986, as amended. 
 2.7 Ownership Limit. The issuance of the Shares to the Holder, together with any other shares of Common Stock of the Company held by the Holder, shall not cause the Holder, and, to the
Holder’s knowledge, any other affiliated Person (as defined in the Company’s Articles of Amendment and Restatement (the “Articles”)), to own shares of capital stock of the Company in violation of the Company’s
ownership limits as set forth in Section 6.2.1 of Article VI of the Company’s Articles. The Holder acknowledges that the issuance of the Shares pursuant to this Agreement is subject to the provisions and remedies in the Company’s
Articles, to the extent the issuance violates the restrictions on ownership and transfer set forth in the Articles, and the application of any such remedies shall not be a breach of this Agreement by the Company. 

2.8 Investor Questionnaire. The representations contained in the Investor Questionnaire set forth as Exhibit A attached
hereto are true and correct. 
 2.9 No General Solicitation. Neither the Holder nor any of its advisors is aware of or
has engaged in or will engage in any form of general solicitation or advertising in connection with the acquisition of the Repurchased Notes by the Holder or the resale of the Shares by the Holder (other than pursuant to the prospectus supplement to
the Shelf Registration Statement contemplated by Section 5.1 hereof), including (i) any advertisement, article, notice or other communication published in any newspaper, magazine or similar media or broadcast over television or
radio; and (ii) any seminar or meeting whose attendees were invited by any general solicitation or general advertising. 

2.10 No Agreements to Sell. The Holder has no contract, understanding, agreement or arrangement with any person or entity to sell,
transfer or grant a participation to such person or entity or any other person or entity, with respect to any or all of the Shares it will receive in accordance with the provisions hereof. 

  
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 2.11 ERISA. No
part of the Repurchased Notes to be used by the Holder to purchase the Shares constitutes “plan assets”, as defined in Department of Labor Regulation Section 2510.3-101 (29 C.F.R. 2510.3-101), of any “employee benefit plan,”
subject to Title I of ERISA or an individual retirement account or plan which is subject to Section 4975 of the Code (collectively, a “Benefit Plan”) or of any account or entity whose underlying assets constitute “plan
assets” of a Benefit Plan by reason of the Benefit Plan’s investment in the account or entity. The Holder is not an employee benefit plan subject to ERISA or Section 4975 of the Code. 

2.12 Advisors. The Holder is relying upon the advice of its own personal, legal and tax advisors with respect to the legal, tax
and other aspects of the sale of the Repurchased Notes and an investment in the Company. 
 2.13 Qualified Institutional
Buyer. The Holder is a “qualified institutional buyer” within the meaning of Rule 144A(a)(1) under the Securities Act of 1933, as amended (the “Securities Act”). 

2.14 Determination of Price. In connection with the purchase of the Repurchased Notes by the Operating Partnership and the
purchase of the Shares by the Holder, the Holder has independently determined an acceptable price for the Repurchased Notes and the Shares, and such price is based upon such independent determination. 

3. Representations and Warranties of the Company and the Operating Partnership. The Company and the Operating Partnership hereby represent and
warrant to the Holder as of the Closing Date, as follows: 
 3.1 Existence and Authority Relative to Agreement. The
Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of Maryland, and the Operating Partnership is a limited partnership duly formed, validly existing and in good standing under the laws of
the State of Maryland. The Company and the Operating Partnership have all necessary corporate power and authority and limited partnership power and authority, respectively, to execute and deliver this Agreement and each other agreement, document or
instrument to be executed in connection herewith and to perform the obligations to be performed by the Company and the Operating Partnership, respectively, hereunder and thereunder. The execution, delivery and performance of this Agreement by the
Company and the Operating Partnership have been duly authorized by all necessary corporate and limited partnership action, respectively. This Agreement and each other instrument or document to be executed in connection herewith have been duly and
validly executed and delivered by a duly authorized officer of the Company, on the Company’s behalf and, as the sole general partner of the Operating Partnership, on the behalf of the Operating Partnership. This Agreement and each other
instrument or document to be executed in connection herewith shall, upon the execution and delivery thereof by the Company and the Operating Partnership, constitute the legal, valid and binding obligations of the Company and the Operating
Partnership enforceable against the Company and the Operating Partnership in accordance with the respective terms thereof, except as the enforceability thereof may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or
similar laws affecting the enforcement of creditors’ rights generally and general equitable principles. 

  
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 3.2 No
Conflicts. Neither the execution, delivery and performance of this Agreement, nor the consummation of the transactions contemplated hereby nor compliance by the Company and the Operating Partnership with any provisions hereof, will
(i) violate (with or without the giving of notice or the lapse of time or both), or conflict with, or result in any violation of or default under, any indenture, mortgage, deed of trust, loan agreement, joint venture agreement, partnership
agreement, limited liability company agreement or any other agreement or instrument to which the Company or the Operating Partnership is a party or by which the Company or the Operating Partnership is bound or to which any of the property or assets
of the Company or the Operating Partnership is subject, except for such conflicts, breaches or violations which would not, singly or in the aggregate, result in a material adverse effect on the consolidated financial position, results of operations
or business of the Company, the Operating Partnership and their subsidiaries taken as a whole (a “Material Adverse Effect”), (ii) result in any violation of the provisions of the charter, by-laws, certificate of limited
partnership, partnership agreement or other organizational documents of the Company, the Operating Partnership or any Subsidiary (as defined below), as the case may be, or (iii) result in any violation of any statute or any order, rule or
regulation of any court or governmental agency or body having jurisdiction over the Company, except where such noncompliance or violation of any such statute, order, rule or regulation would not, singly or in the aggregate, have a Material Adverse
Effect. “Subsidiary” means each of the subsidiaries of the Company and the Operating Partnership which is a “significant subsidiary” as defined in Rule 405 of Regulation C under the Act. 

3.3 No Consents Required. Except for (i) the filing with the Securities and Exchange Commission (the
“Commission”) of a prospectus supplement and a current report on Form 8-K and payment of the fees as contemplated by Section 5.2 hereof and (ii) receipt of official notice that the Shares have been listed for
trading on the New York Stock Exchange, no Consent is required to be filed, given, obtained or taken by the Company or the Operating Partnership by virtue of the execution, delivery and performance of this Agreement or the consummation of the
transactions contemplated hereby, which has not already been obtained. 
 3.4 Brokers and Finders. Neither the Company
nor the Operating Partnership has employed any broker or finder who will seek compensation from the Holder and neither the Company nor the Operating Partnership has otherwise entered into any arrangement regarding the payment of any brokerage fees,
commissions or finder’s fees in connection with the sale of the Repurchased Notes that will result in any liability on the part of the Holder. 
 3.5 Shares. The issuance and sale of the Shares to the Holder pursuant to this Agreement have been duly authorized by the Company. When the Shares are duly paid for and delivered as provided
herein, the Shares will be validly issued, fully paid and nonassessable. The issuance of the Shares is not subject to preemptive or similar rights. The Operating Partnership is the beneficial owner of the Shares, and the sale of the Shares to the
Holder hereunder will transfer title to the Shares free and clear of all liens, claims, charges or encumbrances whatsoever. 

  
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 3.6 WKSI
Status. (i) At the time of filing the Registration Statement, (ii) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the Securities Act, and (iii) as of the date hereof,
the Company was or is (as the case may be) a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act. 
 3.7 Registration Statement. The Company meets the requirements for use of Form S-3 under the Securities Act and has prepared and filed with the Commission an automatic shelf registration statement,
as defined in Rule 405 (File Number 333-158958), on Form S-3, including a related base prospectus, for registration under the Securities Act of the offering and sale of certain securities. Such registration statement, including the exhibits thereto
and the documents, if any, incorporated by reference therein, as amended (or deemed to have been amended pursuant to Rules 430A, 430B or 430C under the Securities Act) from time to time, is hereinafter referred to as the “Shelf Registration
Statement.” Such Shelf Registration Statement, including any amendments thereto filed prior to the date of this Agreement or prior to any such time this representation is repeated or deemed to be made, became effective upon filing and no
stop order suspending the effectiveness of the Shelf Registration Statement or any part thereof has been issued or is in effect and no proceeding for that purpose has been initiated or threatened by the Commission or by the state securities
authority of any jurisdiction, and no notice of objection of the Commission to the use of the Shelf Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act has been received by the Company.
The Shelf Registration Statement complies in all material respects with the applicable requirements of the Securities Act and the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the respective rules thereunder
and does not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading; provided, however, that the Company and the Operating
Partnership make no representations or warranties as to the information contained in or omitted from the Shelf Registration Statement or any related prospectus supplement in reliance upon and in conformity with information furnished in writing to
the Company or the Operating Partnership by the Holder specifically for inclusion in the Shelf Registration Statement or any related prospectus supplement. 
 3.8 No General Solicitation. The Company is not aware of nor has it engaged in nor will it engage in any form of general solicitation or advertising in connection with sale of the Shares to the
Holder, including (i) any advertisement, article, notice or other communication published in any newspaper, magazine or similar media or broadcast over television or radio; and (ii) any seminar or meeting whose attendees were invited by
any general solicitation or general advertising. 
 4. Covenants. 

4.1 Tax Matters. The Holder shall cooperate, as and to the extent reasonably requested by the Company and the Operating
Partnership, in connection with the filing of any tax returns, tax elections or other tax reporting matters related to the transactions contemplated by this Agreement. Such cooperation shall include the retention and (upon the Company’s or the
Operating Partnership’s reasonable request) the provision of records and information which are reasonably relevant to any such tax matter and making employees available on a mutually convenient basis to provide additional information and
explanation of any material provided hereunder. 

  
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 4.2
Withholding. At the Closing, the Holder shall deliver to the Operating Partnership a properly executed certificate prepared in accordance with Treasury regulations section 1.1445-2(b) certifying the Holder’s non-foreign status and a
properly executed Internal Revenue Service Form W-9. The Holder will promptly inform the Operating Partnership if the information in any of such forms becomes untrue. The Operating Partnership shall be entitled to withhold taxes to the extent
required by applicable law from any payment made to the Holder pursuant to this Agreement. 
 5. Registration Rights. 

5.1 Shelf Registration. The Company shall prepare and file with the Commission as soon as practicable after the Closing Date a
prospectus supplement to the Shelf Registration Statement for an offering of the Shares to be made on a continuous or delayed basis by the Holder pursuant to Rule 415 under the Securities Act. The Company shall use its commercially reasonable
efforts to keep the Shelf Registration Statement continuously effective (subject to Section 5.3 hereof) until the earliest of (A) such time as all of the Shares have been sold pursuant to the Shelf Registration Statement or Rule 144
and (B) the date on which the Shares may be sold by non-affiliates without volume restrictions in accordance with Rule 144. As a condition to the filing of the prospectus supplement to the Shelf Registration Statement pursuant to this
Section 5.1, the Holder agrees to deliver to the Company a completed Notice and Questionnaire in the form attached as Exhibit B hereto and such other information as the Company may reasonably request in writing, if any, at least
two business days prior to the anticipated filing date of the prospectus supplement, and thereafter shall notify the Company as promptly as practicable of any inaccuracies or changes to such information previously provided that occur subsequent to
the filing of the prospectus supplement and prior to the sale of the Shares thereunder. 
 5.2 Registration Expenses. In
connection with any registration statement required to be filed hereunder, the Company shall pay the following registration expenses incurred in connection with the registration hereunder: (i) all registration and filing fees,
(ii) printing expenses, (iii) internal expenses (including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), (iv) the fees and expenses incurred in connection with the
listing of the Shares on each securities exchange on which similar securities issued by the Company are then listed, (v) reasonable fees and disbursements of counsel for the Company and customary fees and expenses for independent certified
public accountants retained by the Company and (vi) the reasonable fees and expenses of any special experts retained by the Company in connection with such registration. The Company shall have no obligation to pay any underwriting fees,
discounts or commissions attributable to the sale of Shares, or any out-of-pocket expenses of the Holder (or the agents who manage its accounts) or any transfer taxes relating to the registration or sale of the Shares. 

5.3 Holdback Agreements. 
 (a) If the Company determines in its good faith judgment that the filing of the Shelf Registration Statement or a prospectus supplement thereunder or the use of any related prospectus or prospectus
supplement would require the disclosure of non-public material information that the Company has a bona fide business purpose for preserving as confidential or 

  
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the disclosure of which would impede the Company’s ability to consummate a material action, and that the Company is not otherwise required by applicable securities laws or regulations to
disclose at such time, upon written notice of such determination by the Company, the rights of the Holder to offer, sell or distribute any Shares pursuant to the Shelf Registration Statement or to require the Company to take action with respect to
the registration or sale of any Shares pursuant to the Shelf Registration Statement shall be suspended until the date upon which the Company notifies the Holder in writing that suspension of such rights for the grounds set forth in this
Section 5.3(a) is no longer necessary. The Company agrees to give such notice as promptly as practicable following the date that such suspension of rights is no longer necessary. 

(b) If all reports required to be filed by the Company pursuant to the Exchange Act have not been filed by the required date without
regard to any extension, or if the consummation of any business combination by the Company has occurred or is probable for purposes of Rule 3-05, Rule 3-14 or Article 11 of Regulation S-X, upon written notice thereof by the Company to
the Holder, the rights of the Holder to offer, sell or distribute any Shares pursuant to the Shelf Registration Statement or to require the Company to take action with respect to the registration or sale of any Shares pursuant to the Shelf
Registration Statement shall be suspended until the date on which the Company has filed such reports or obtained and filed the financial information required by Rule 3-05, Rule 3-14 or Article 11 of Regulation S-X to be included or
incorporated by reference, as applicable, in the Shelf Registration Statement, and the Company shall notify the Holder as promptly as practicable when such suspension is no longer required. 

5.4 Underwriting Agreement. The Company will not be required to enter into an underwriting or other similar agreement with respect
to the disposition of the Shares. 
 5.5 Prospectus Delivery. The Holder agrees that unless the Shares are eligible for
resale pursuant to all the conditions of Rule 144 under the Securities Act without volume or manner of sale limitations, it will resell the Shares only pursuant to the Shelf Registration Statement (subject to Section 5.3 hereof), in a
manner described under the caption “Plan of Distribution” in the prospectus supplement under the Shelf Registration Statement with respect to the Shares, and in a manner in compliance with all applicable securities laws, including, without
limitation, any applicable prospectus delivery requirements of the Securities Act (or in compliance with Rule 172 thereunder) and the insider trading restrictions of the Exchange Act. 
 6. General. 
 6.1 Notices. All notices and other communications
required or permitted to be given hereunder shall be in writing and shall be deemed to have been duly given if personally delivered, delivered by nationally recognized overnight courier with proof of delivery thereof, sent by United States
registered or certified mail (postage prepaid, return receipt requested) addressed as hereinafter provided or via telephonic facsimile transmission with proof of delivery in the form of a telecopier’s transmission confirmation report. Notice
shall be sent and deemed given when (a) if personally delivered or via nationally recognized overnight courier, then upon receipt by the receiving party, or (b) if mailed, then three (3) days after being postmarked, or (c) if
sent via telephonic facsimile transmission, then at the time set forth in the telecopier’s transmission confirmation report. 

  
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 Any party listed below
may change its address hereunder by notice to the other party listed below. Until further notice, notice and other communications hereunder shall be addressed to the parties listed below as follows: 

If to the Holder: 
 Stifel, Nicolaus & Co., Inc. 
 237 Park Avenue 

8th Floor 
 New York, New York 10017 
 Attention: Abby Flamholz 

Facsimile: (212) 682-3535 
 Email: flamholza@stifel.com 
 If to the Company or the Operating Partnership:

 Digital Realty Trust, Inc. 
 560 Mission Street, Suite 2900 
 San Francisco, California 94105 

Attention: Joshua A. Mills, General Counsel 
 Facsimile: (415) 738-6521 
 E-mail: jmills@digitalrealtytrust.com 

With a copy to: 

Keith Benson, Esq. 
 Julian T.H. Kleindorfer, Esq. 
 Latham & Watkins LLP 

505 Montgomery Street, 20th Floor 
 San Francisco, California 94111 
 Facsimile: (415) 395-8095 

E-mail: keith.benson@lw.com 
 or
to such other address as any party hereto shall have designated by notice in writing to the other party. 
 6.2 Further
Assurances. Each party hereto shall at any time, and from time to time, both before and after the date of this Agreement, upon request of the other party hereto, execute, acknowledge and deliver all such further assignments, transfers,
conveyances or other documents or instruments, and take all such further action, as may be requested by the other party to carry out the intent of this Agreement. 

  
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 6.3 Expenses.
Subject to the provisions of Section 5.2 hereof, the parties hereto shall each pay their respective fees and expenses, including but not limited to attorneys’ fees, incident to the negotiations, preparation and execution of this
Agreement and the consummation of the transactions provided for herein. 
 6.4 Entire Agreement. This Agreement
constitutes the entire agreement between the parties with respect to the subject matter hereof. This Agreement can be amended, supplemented or changed, and any provision hereof can be waived, only by a written instrument making specific reference to
this Agreement and duly executed by the party to be bound thereby. This Agreement supersedes all prior agreements and understandings between the parties with respect to the transactions contemplated hereby. 

6.5 Assignability. Neither this Agreement nor any of the rights or obligations hereunder may be assigned without the prior written
consent of the parties hereto and any attempt to do so shall be of no force or effect. 
 6.6 Captions. The captions of
the various sections and articles contained in this Agreement are for reference purposes only and shall not be deemed in any manner to affect the meaning or interpretation of any of the provisions of this Agreement. 

6.7 Severability. If any provision of this Agreement or in any document referred to herein shall be determined to be illegal, void
or unenforceable, all other provisions of this Agreement or in any other document referred to herein shall not be affected and shall remain in full force and effect. 
 6.8 Applicable Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York. 

6.9 Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original,
and all of which together shall constitute one and the same instrument. 
 6.10 Survival. The warranties,
representations, covenants and agreements contained in this Agreement shall survive the execution and delivery of this Agreement and the Closing of the transactions contemplated hereby. 

[Signature Page Follows] 

  
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 IN WITNESS WHEREOF,
the parties hereto have executed this Agreement as of the date first above written. 
  

			
	STIFEL, NICOLAUS & CO., INC.,
	a Missouri corporation
		
	By:	 	   /s/ Abby Flamholz

		 	Name: Abby Flamholz
		 	Title: Managing Director

 [Signature
Page to Exchange Agreement] 

  
 
					
	DIGITAL REALTY TRUST, INC.,
	a Maryland corporation
		
	By:	 	         /s/ Joshua A. Mills

		 	Name:	 	Joshua A. Mills
		 	Title:	 	 Sr. Vice President, General Counsel
 and Assistant Secretary

	
	 DIGITAL REALTY TRUST, L.P.,
 a Maryland limited partnership

	
	 By: DIGITAL REALTY TRUST, INC.,
 its general partner

		
	By:	 	         /s/ Joshua A. Mills

		 	Name:	 	Joshua A. Mills
		 	Title:	 	 Sr. Vice President, General Counsel
 and Assistant Secretary

 [Signature Page to Exchange
Agreement] 

 Schedule A 

Holder Wire Transfer Instructions and Share Delivery Instructions 

  
 1 

 Exhibit A 

INVESTOR QUESTIONNAIRE 

Capitalized terms not defined herein shall have such meaning as set forth in the Exchange Agreement by and among Stifel, Nicolaus & Co., Inc.
(the “Holder”), Digital Realty Trust, Inc. (the “Company”) and Digital Realty Trust, L.P. (the “Operating Partnership”), of even date herewith (the “Agreement”). 

ALL QUESTIONS IN THE APPROPRIATE SECTION MUST BE ANSWERED. 
 SECTION I. 
  

	 	1.	Name and Nature (e.g., limited partnership, corporation, trust, limited liability company) of the
Holder:                                        
                                         
                                         
                               

 

	 	2.	Date of
Organization:                                       
                                         
                                         
        

  

	 	3.	Jurisdiction of
Organization:                                       
                                         
                                     

 

	 	4.	Taxpayer Identification
No.:                                        
                                         
                                    

SECTION II. REPRESENTATIONS AND WARRANTIES 
 The Holder hereby warrants and represents to the Company and the Operating Partnership, that each of the following statements is true and correct as of the date hereof and shall be true and correct as of
the Closing Date: 
 A. The Holder is acquiring the Shares solely for its own account, as principal and not as a nominee or
agent for any other person, for investment and not with a view toward resale or distribution thereof in violation of the Securities Act of 1933, as amended (the “Securities Act”). The Holder agrees and acknowledges that the issuance
of the Shares to it will not be registered with the Securities and Exchange Commission under the Securities Act, based upon an exemption from the registration requirements of the Securities Act and it will not, directly or indirectly, offer,
transfer, sell, assign, pledge, hypothecate or otherwise dispose of (hereinafter, “Transfer”) any of the Shares unless such Transfer complies with the Agreement and either (i) the Transfer is pursuant to an effective
registration statement under the Securities Act and qualification or other compliance under applicable blue sky or state securities laws, or (ii) if requested by the Company, counsel for the Holder (which counsel shall be reasonably acceptable
to the Company) shall have furnished the Company with an opinion, reasonably satisfactory in form and substance to the Company, to the effect that no such registration is required because of the availability of an exemption from registration under
the Securities Act and qualification or other compliance under applicable blue sky or state securities laws. 
 B. The Holder
has such knowledge and experience in financial and business matters that it is capable of evaluating the merits and risks of the investment in the Shares. 

  
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 C. The Holder understands that the Shares have not been registered under the Securities Act
or the securities laws of any state and, as a result thereof, are subject to substantial restrictions on transfer. 
 D. Neither
the Company nor the Operating Partnership solicited the Holder with respect to the acquisition of the Repurchased Notes. The terms of the Exchange were individually negotiated between the Company and the Operating Partnership, on the one hand, and
the Holder, on the other. 
 E. The Holder hereby represents that it has no intention to dissolve and that it presently engages
in activities other than those related to, and holds assets other than, the Repurchased Notes and the Shares. 
 F. The Holder
does not have any contract, undertaking, agreement or arrangement with any person to sell, transfer or grant participation to any third person with respect to any of the Shares. 

G. The Holder has the ability to bear the economic risks of the Shares and is able to afford the complete loss of such investment.

 H. The Holder has had an opportunity to ask questions regarding the Repurchased Notes, the Shares and the business of the
Company and the Operating Partnership, and has acquired sufficient information about the Company and the Operating Partnership to reach an informed decision to sell the Repurchased Notes to the Operating Partnership and acquire the Shares.

 I. The Holder acknowledges that the Shares are subject to certain limitations on ownership, transfer or redemption set forth
in the Company’s charter. 
 J. There has been made available to the Holder and its advisors the opportunity to ask
questions of, and receive answers from the Company concerning the terms and conditions of the investment in the Shares, and to obtain the documents publicly filed with the Securities and Exchange Commission by the Company and any additional
information, to the extent that the Company possesses such information, or can acquire it without unreasonable effort or expense, necessary to verify the accuracy of the information given to it, or to otherwise make an informed investment decision,
and that the Holder has had an opportunity to consult with counsel and other advisers about the investment in the Shares, and that all material documents, records and books pertaining to such investment have, on request, been made available to the
Holder and its advisors. 
 K. The Shares shall bear a legend substantially to the effect of the following: 

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND
ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER AGREES (1) THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THE SECURITY EVIDENCED

  
 2 

 
HEREBY, EXCEPT (A) TO THE ISSUER OR A SUBSIDIARY OF THE ISSUER; (B) UNDER A REGISTRATION STATEMENT THAT HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT; (C) TO A PERSON THE
SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A ADOPTED UNDER THE SECURITIES ACT) THAT IS PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF ANOTHER QUALIFIED INSTITUTIONAL BUYER AND TO WHOM NOTICE IS GIVEN
THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, ALL IN COMPLIANCE WITH RULE 144A (IF AVAILABLE); OR (D) UNDER ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT; AND (2) THAT IT WILL, PRIOR TO
ANY TRANSFER OF THIS SECURITY, FURNISH TO THE TRANSFER AGENT AND THE ISSUER SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS MAY BE REQUIRED TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION
NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. 
 L. The Holder has relied solely on its own
investigations in making a decision to sell the Repurchased Notes and purchase the Shares, and has received no representation or warranty from the Company or the Operating Partnership, or any of their affiliates, employees or agents, other than
those set forth in the Agreement. 

  
 3 

 IN WITNESS WHEREOF, the undersigned has executed this Investor Questionnaire this
     day of November, 2010, and declares that it is truthful and correct. 
  

	
	STIFEL, NICOLAUS & CO., INC.
	
	  

	Authorized Signatory
	
	  

	PRINT Name and Title of Person Signing
	
	Address:
	
	  

	
	  

	
	  

 Exhibit B 

SELLING SECURITYHOLDER NOTICE AND QUESTIONNAIRE
 The undersigned beneficial owner (the “Selling Securityholder”) of common stock par value $0.01 (the “Registrable Securities”) of Digital Realty Trust, Inc. (the “Company”)
understands that the Company has filed or intends to file with the Securities and Exchange Commission a registration statement (the “Shelf Registration Statement”) or a prospectus supplement under an existing Shelf Registration Statement
for the registration of the resale under Rule 415 of the Securities Act of 1933, as amended, of the Registrable Securities in accordance with the terms of the Exchange Agreement, dated November 16, 2010 (the “Exchange Agreement”),
among the Company, Digital Realty Trust, L.P. and the Selling Securityholder. All capitalized terms not otherwise defined herein shall have the meaning ascribed thereto in the Exchange Agreement. 

Notice 

The Selling Securityholder hereby gives notice to Digital Realty Trust, Inc. of its intention to sell or otherwise dispose of Registrable
Securities beneficially owned by it and listed below in Item 3(b) pursuant to the Shelf Registration Statement. The undersigned, by signing and returning this Notice and Questionnaire, understands that it will be bound by the terms and
conditions of this Notice and Questionnaire. 
 The undersigned hereby provides the following information to Digital Realty
Trust, Inc. and represents and warrants that such information is accurate and complete: 
 Questionnaire 

 

	1.	(a)   Full Legal Name of Selling Securityholder: 

  

	 	(b)	Full Legal Name of Registered Holder (if not the same as (a) above) through which Registrable Securities listed in Item (3) below are held:

  

	 	(c)	Full Legal Name of DTC Participant (if applicable and if not the same as (b) above) through which Registrable Securities listed in Item (3) below are held:

  

	2.	Address for Notices to Selling Securityholder: 

 Telephone: 
 Fax: 

Email address: 

Contact Person: 
  

	3.	Beneficial Ownership of Registrable Securities: 

 Except as set forth below in this Item (3), the undersigned Selling Securityholder does not beneficially own any Registrable Securities. 

(a) Number of shares of Registrable Securities beneficially owned: 

(b) Number of shares of the Registrable Securities which the undersigned wishes to be included in the Shelf Registration Statement:

	4.	Beneficial Ownership of other Digital Realty Trust, Inc. securities owned by the Selling Securityholder: 

Except as set forth below in this Item (4), the undersigned is not the beneficial or registered owner of any securities of Digital Realty
Trust, Inc. other than the Registrable Securities listed above in Item (3). 
 (a) Type and amount of other securities
beneficially owned by the Selling Securityholder: 
 (b) CUSIP No(s). of such other securities beneficially owned: 

 

	5.	Relationship with Digital Realty Trust, Inc.: 

  

	 	(a)	Have you or any of your affiliates, officers, directors or principal equity holders (owners of 5% or more of the equity securities of the Selling Securityholder) held
any position or office or have you had any other material relationship with the Company (or its predecessors or affiliates) within the past three years? 

 ̈   Yes. 

 ̈   No. 

 

	 	(b)	If so, please state the nature and duration of your relationship with the Company: 

 

	6.	(a) Broker-Dealer Status 

Is the Selling Securityholder a broker-dealer registered pursuant to Section 15 of the Exchange Act? 

 ̈   Yes. 

 ̈   No. 

Note that we may be required to state that any registered broker-dealer may be an underwriter in the prospectus.  

If so, please answer the remaining questions in this section. 
 If the Selling Securityholder is a registered broker-dealer, please indicate whether the Selling Securityholder purchased its Registrable Securities for investment or acquired them as transaction-based
compensation for investment banking or similar services. 
 If the Selling Securityholder is a registered broker-dealer and
received its Registrable Securities other than as transaction-based compensation, the Company may be required to state that you may be an underwriter in the Shelf Registration Statement and related Prospectus. 

 

	 	(b)	Affiliation with Broker-Dealers: 

Is the Selling Securityholder an affiliate of a registered broker-dealer? For purposes of this Item 5(b), an “affiliate” of
a specified person or entity means a person or entity that directly, or indirectly through one or more intermediaries, controls or is controlled by, or is under common control with, the person or entity specified. 

 ̈   Yes. 

 ̈   No. 

If so, please answer the remaining questions in this section. 

 

	 	(i)	Please describe the affiliation between the Selling Securityholder and any registered broker-dealers: 

	 	(ii)	If the Registrable Securities were purchased by the Selling Securityholder other than in the ordinary course of business, please describe the circumstances:

  

	 	(iii)	If the Selling Securityholder, at the time of its purchase of Registrable Securities, has had any agreements or understandings, directly or indirectly, with any person
to distribute the Registrable Securities, please describe such agreements or understandings: 

 Note that if
the Selling Securityholder is an affiliate of a broker-dealer and did not purchase its securities in the ordinary course of business or at the time of the purchase had any agreements or understandings, directly or indirectly, to distribute the
securities, we may be required to state that the Selling Securityholder may be an underwriter in the prospectus. 
  

	7.	Nature of Beneficial Holding. The purpose of this question is to identify the ultimate natural person(s) or publicly held entity that exercise(s) sole or shared
voting or dispositive power over the Registrable Securities.  

  

	 	(a)	Is the Selling Securityholder a natural person? 

  ̈   Yes. 

 ̈   No. 

 

	 	(b)	Is the Selling Securityholder required to file, or is it a wholly owned subsidiary of a company that is required to file, periodic and other reports (for example, Forms
10-K, 10-Q, 8-K) with the Securities and Exchange Commission pursuant to Section 13(a) or 15(d) of the Exchange Act? 

  ̈   Yes. 
  ̈   No. 
  

	 	(c)	State whether the Selling Securityholder is an investment company, or a subsidiary of an investment company, registered under the Investment Company Act of 1940, as
amended: 

  ̈   Yes. 

 ̈   No. 

If a subsidiary, please identify the publicly held parent entity: 

 

	 	(d)	If you answered “No” to questions (a), (b) and (c) above, please identify the controlling person(s) of the Selling Securityholder (the
“Controlling Entity”). If the Controlling Entity is not a natural person or a publicly held entity, please identify each controlling person(s) of such Controlling Entity. This process should be repeated until you reach natural persons or a
publicly held entity that exercise sole or shared voting or dispositive power over the Registrable Securities: 

 *** PLEASE
NOTE THAT THE SECURITIES AND EXCHANGE COMMISSION REQUIRES THAT THESE NATURAL PERSONS BE NAMED IN THE PROSPECTUS *** 
 If you
need more space for this response, please attach additional sheets of paper. Please be sure to indicate your name and the number of the item being responded to on each such additional sheet of paper, and to sign each such additional sheet of paper
before attaching it to this Notice and Questionnaire. Please note that you may be asked to answer additional questions depending on your responses to the above questions. 

  

	8.	Plan of Distribution: 

 Except as
set forth below, the undersigned (including its donees or pledgees) intends to distribute the Registrable Securities listed above in Item (3) pursuant to the Shelf Registration Statement only as follows (if at all): such Registrable Securities
may be sold from time to time directly by the undersigned or alternatively through underwriters, broker-dealers or agents. If the Registrable Securities are sold through underwriters, broker-dealers or agents, the Selling Securityholder will be
responsible for underwriting discounts or commissions or agent’s commissions. Such Registrable Securities may be sold in one or more transactions at fixed prices, at prevailing market prices at the time of sale, at varying prices determined at
the time of sale, or at negotiated prices. Such sales may be effected in transactions (which may involve crosses or block transactions) (i) on any national securities exchange or quotation service on which the Registrable Securities may be
listed or quoted at the time of sale, (ii) in the over-the-counter market, (iii) in transactions otherwise than on such exchanges or services or in the over-the-counter market or (iv) through the writing of options. The Selling
Securityholder may pledge or grant a security interest in some or all of the Registrable Securities owned by it and, if it defaults in the performance of its secured obligations, the pledgees or secured parties may offer and sell the Registrable
Securities from time to time pursuant to the prospectus. The Selling Securityholder also may transfer and donate shares in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the Selling
Securityholder for purposes of the prospectus. 
 State any exceptions here:  

 

	Note:	In no event may such method(s) of distribution take the form of an underwritten offering of the Registrable Securities without the prior agreement of Digital Realty
Trust, Inc. 

 The Company hereby advises the Selling Securityholder of the following Compliance and Disclosure Interpretation
of the Staff of the Division of Corporation Finance of the Securities and Exchange Commission available at http://www.sec.gov/divisions/corpfin/guidance/sasinterp.htm regarding short selling: 
 “Securities Act Sections—Section 239. Securities Act Section 5. 
 239.10. An issuer
filed a Form S-3 registration statement for a secondary offering of common stock which is not yet effective. One of the selling shareholders wanted to do a short sale of common stock “against the box” and cover the short sale with
registered shares after the effective date. The issuer was advised that the short sale could not be made before the registration statement becomes effective, because the shares underlying the short sale are deemed to be sold at the time such sale is
made. There would, therefore, be a violation of Section 5 if the shares were effectively sold prior to the effective date. [Nov. 26, 2008].” 
 By returning this Notice and Questionnaire, the Selling Securityholder will be deemed to be aware of the foregoing interpretation. 
 The undersigned acknowledges that it understands its obligation to comply with the provisions of the Exchange Act and the rules thereunder relating to stock manipulation, particularly Regulation M
thereunder (or any successor rules or regulations), in connection with any offering of Registrable Securities pursuant to the Shelf Registration Statement. The undersigned agrees that neither it nor any person acting on its behalf will engage in any
transaction in violation of such provisions. 
 In accordance with the undersigned’s obligation under the Exchange
Agreement to provide such information as may be required by law for inclusion in the Shelf Registration Statement, the undersigned agrees to provide any additional information Digital Realty Trust, Inc. may reasonably request and to promptly notify
Digital Realty Trust, Inc. of any inaccuracies or changes in the information provided that may occur at any time while the Shelf Registration Statement remains effective. All notices hereunder and pursuant to the Exchange Agreement shall be made in
writing by hand-delivery, first-class mail, or air courier guaranteeing overnight delivery as follows: 
  

					
		 	To the Company:	  	  
 Digital Realty Trust, Inc.

			
		 		  	560 Mission Street, Suite 2900
			
		 		  	San Francisco, CA 94105
			
		 		  	Attention: General Counsel

  
 In the event any
Selling Securityholder transfers all or any portion of the Registrable Securities listed in Item 3 above after the date on which such information is provided to Digital Realty Trust, Inc., the Selling Securityholder will notify the
transferee(s) at the time of transfer of its rights and obligations under this Notice and Questionnaire and the Exchange Agreement. 
 By signing this Notice and Questionnaire, the undersigned consents to the disclosure of the information contained herein in its answers to items (1) through (8) above and the inclusion of such
information in the Shelf Registration Statement, the related prospectus and any state securities or Blue Sky applications. The undersigned understands that such information will be relied upon by Digital Realty Trust, Inc. without independent
investigation or inquiry in connection with the preparation or amendment of the Shelf Registration Statement, the related prospectus and any state securities or Blue Sky applications. 

Once this Notice and Questionnaire is executed by the Selling Securityholder and received by Digital Realty Trust, Inc., the terms of
this Notice and Questionnaire and the representations and warranties contained herein shall be binding on, shall inure to the benefit of, and shall be enforceable by the respective successors, heirs, personal representatives and assigns of Digital
Realty Trust, Inc. and the Selling Securityholder with respect to the Registrable Securities beneficially owned by such Selling Securityholder and listed in Item (3) above. This Notice and Questionnaire shall be governed by, and construed in
accordance with, the laws of the State of New York without regard to the conflicts-of-laws provisions thereof. 
 IN WITNESS
WHEREOF, the undersigned, by authority duly given, has caused this Notice and Questionnaire to be executed and delivered either in person or by its authorized agent. 
 Dated: 
  

			
	Beneficial Owner:
		
	By:	 	  

		
	Name:	 	  

		
	Title:	 	  

Please return the completed and executed notice and questionnaire to: 

Digital Realty Trust, Inc. 
 560 Mission Street, Suite 2900 
 San Francisco, CA 94105 

Attention: General CounselSecond Amended

  
 Exhibit 10.1

 SECOND AMENDED AND RESTATED 
 SERVICE AGREEMENT 
 This Second Amended and Restated
Service Agreement (the “Agreement”) is entered into and executed on the 10th of November, 2010, but is effective on the 15th day of November, 2010 (the “Effective Date”), by and between Protechnics II, Inc. (“Protechnics”), and Flotek Industries, Inc., a Delaware corporation (the
“Company”). 
 WHEREAS, Protechnics and Chisholm Management, Inc. have previously entered into that certain
Service Agreement dated August, 2009 with the Company, pursuant to which said entities are providing services to the Company (the “Original Service Agreement”); 

WHEREAS, Protechnics and the Company have previously entered into that certain Amended and Restated Service Agreement dated April 2010,
pursuant to which the Original Service Agreement was amended and restated effective as of December 1, 2009 (the “First Amendment”); 
 WHEREAS, the Company has entered into with John Chisholm (“Chisholm”) effective the date hereof that certain letter agreement providing for the employment of Chisholm by the Company for
certain limited purposes (the “Employment Letter Agreement”); 
 NOW, THEREFORE, in consideration of the
foregoing and the covenants, representations and agreements set forth below, the Company and Protechnics hereby agree that the Original Service Agreement and the First Amendment shall be hereby amended and restated as follows: 

1. Retention. The Company hereby retains Protechnics, and Protechnics hereby agrees to render services to the Company, upon the
terms and conditions contained in this Agreement. 
 2. Term of the Agreement. The term of this Agreement (the
“Term”) shall commence on the Effective Date and shall continue until terminated in accordance with Section 6. 
 3. Services to be Provided by Protechnics. 
 3.1. Scope,
Responsibilities and Duties. 
 (a) Protechnics agrees that it will employ Chisholm throughout the term of
this Agreement, and that it will make Chisholm available to the Company to provide services (the “Services”) to the Company so that the Company may have the benefit of the experience and knowledge possessed by Chisholm in assisting
the Company with respect to its business and operations as reasonably requested by the Board of Directors of the Company. Protechnics may from time to time designate one or more additional entities to perform the Services in addition to Protechnics.
Such additional entities are referred to herein collectively with Protechnics as the “Chisholm Companies.” 

  
 (b) The
Services shall be performed at times and places selected by mutual agreement of the Company and the Chisholm Companies within normal business hours. The Chisholm Companies shall comply with all applicable laws and regulations in the performance of
the Services, including but not limited to applicable securities laws. 
 (c) The Chisholm Companies shall make
such periodic reports to the Company relating to the Services as the Board of Directors of the Company may, from time to time, reasonably request. 
 3.2. Best Efforts. The Chisholm Companies shall cause Chisholm to devote his reasonable best efforts and his full business time and attention (except for permitted vacation periods, periods of
illness or other incapacity) to the business and affairs of the Company. This Section shall not restrict Chisholm from involvement in usual and customary charitable activities, or from the management of passive investments. 

4. Compensation. As compensation for the Services to be provided by the Chisholm Companies to the Company: 

4.1 Monthly Payment. The Company shall pay to the Chisholm Companies, and the Chisholm Companies agrees to accept,
a monthly fee of $42,000 allocated among the Chisholm Companies as designated by Protechnics from time to time, payable on a weekly basis (the “Base Compensation”). The Chisholm Companies shall not be entitled to any other
compensation for the Services to be provided hereunder, except as provided herein. The Company shall not be responsible for withholding from the compensation payable to the Chisholm Companies any amounts for federal, state or local income taxes,
social security or state disability or unemployment insurance. 
 4.2 Bonus. The Chisholm Companies shall
be entitled to annual bonuses in accordance with the then applicable Management Incentive Plan of the Company, with a “Target Bonus” for purposes of such plan of 60% of Base Salary (a “Target Bonus”) for each of the years
2010, 2011 and 2012. 
 4.3 Equity Grants. The Company shall (i) grant to Chisholm the option to
purchase 300,000 shares of the common stock of the Company pursuant to the 2010 Long-Term Incentive Plan (the “2010 Plan”) pursuant to an option agreement entered into on the date of the execution of this Agreement, and
(ii) issue to Chisholm 300,000 restricted shares of the common stock of the Company pursuant to the 2010 Plan pursuant to a restricted stock agreement entered into on the date of the execution of this Agreement, in each subject to the vesting
provisions set forth therein. The issuance of shares and the grant of options described in this Section 4.3 are referred to herein as the “Awards.” 

  
 2 

  
 5. Expenses.
Upon receipt of itemized vouchers, expense account reports and supporting documents submitted to the Company in accordance with the Company’s procedures then in effect and as approved by the Board of Directors of the Company, the Company shall
reimburse the Chisholm Companies for all reasonable and necessary business expenses (including travel and entertainment expenses) incurred ordinarily and necessarily by the Chisholm Companies in connection with the performance of the Chisholm
Companies’ duties hereunder. Notwithstanding the foregoing, however, the Chisholm Companies shall not receive any reimbursement for health insurance premiums, club memberships, or automobile expenses. 

6. Termination. 
 6.1 Term. The term of this Agreement shall expire on December 31, 2012. The term of this Agreement shall automatically extend for successive twelve (12) month periods unless either party
hereto provides to the other party hereto written notice of non-renewal at least 3 months prior to the date the term would otherwise renew. 
 6.2 Early Termination. 
 (a) The Company may terminate this
Agreement at any time and for any reason, with or without “Cause”, including but not limited to the death or Disability (as hereinafter defined) of Chisholm. For purposes hereof, the term “Cause” means (i) the
Chisholm Companies’ or Chisholm’s continued failure to substantially perform one or more of their essential duties and obligations to the Company (other than any such failure resulting from a disability) which, to the extent such failure
is remediable, they fail to remedy in a reasonable period of time (not to exceed ten (10) days) after receipt of written notice from the Company of such failure; (ii) the Chisholm Companies’ or Chisholm’s refusal or failure to
comply with the reasonable and legal directives of the Board of Directors after written notice from the Board describing their failure to comply and, if such failure is remediable, their failure to remedy same within ten (10) days of receiving
written notice of such failure; (iii) any act of personal dishonesty, fraud or misrepresentation taken by the Chisholm Companies or Chisholm which was intended to result in gain or personal enrichment of any of them at the expense of the
Company; (iv) the Chisholm Companies’ or Chisholm’s violation of a federal or state law or regulation applicable to the Company’s business which violation was or is reasonably likely to be materially injurious to the Company;
(v) the Chisholm Companies’ or Chisholm’s conviction of, or plea of nolo contendere or guilty to, a felony under the laws of the United States or any State that is reasonably likely to be materially injurious to the Company;
(vi) Chisholm’s abuse of drugs, other narcotics or alcohol during working hours or where such abuse (whenever occurring) impacts on his working day, (vii) the Chisholm Companies’ breach of any of their obligations under this
Agreement; or (viii) the Chisholm Companies’ or Chisholm’s violation of a material policy of the Company and, if such violation is remediable, their failure to remedy same within ten (10) days of receiving written notice of such
violation. 

  
 3 

  
 (b) The
Chisholm Companies may terminate this Agreement for “Good Reason.” “Good Reason” shall exist upon the occurrence of one of the following Company actions (unless the Chisholm Companies consent in writing to such action(s)):
(i) a material reduction of the compensation and benefits to which the Chisholm Companies or Chisholm were entitled immediately prior to such reduction, (ii) a material reduction in the duties, authority or responsibilities relative to the
duties, authority or responsibilities of the Chisholm Companies or Chisholm as in effect immediately prior to such reduction, or (iii) the relocation of Chisholm to a facility or a location more than fifty (50) miles from Chisholm’s
then present location; provided, however, that (A) the Chisholm Companies must provide the Company with written notice of the occurrence of such action(s) within 60 days of the initial occurrence of such action(s) and of its intent to terminate
the term of this Agreement based on such action(s) and (B) the Company will have 30 days from the date that such written notice is provided by the Chisholm Companies to cure such action(s). 

6.3 Severance. 
 (a) If this Agreement is terminated by the Company without Cause (but not in connection with a Change of Control which is subject to Section 6.3(b)), or by the Chisholm Companies for Good Reason, the
Chisholm Companies shall be entitled to receive severance compensation equal to Base Compensation and Target Bonus in effect for the year in which the termination of this Agreement occurs, with the Base Compensation payable in 12 monthly
installments equal to one-twelfth of such portion of the severance compensation, payable at the end of each of the next twelve full calendar months following the calendar month of the date of termination of this Agreement, and the Target Bonus
payable when such amounts would have been payable pursuant to the then applicable Management Incentive :Plan of the Company. 
 (b) If this Agreement is terminated by the Company without Cause or the Chisholm Companies for any reason as an integral part of or within six months after a Change of Control, the Chisholm Companies
shall be entitled to receive severance compensation equal to the product of two multiplied by the Base Compensation and Target Bonus in effect for the year in which the Change of Control occurs, payable immediately upon such termination.
“Change of Control” shall have the meaning given to such term in the 2010 Plan. A termination shall be considered in connection with a Change of Control if the termination occurs within three months of the occurrence of the Change
of Control. 
 (c) If this Agreement is terminated by the Company with Cause, or due to the death or Disability
of Chisholm, the Chisholm Companies shall be entitled to receive only Base Compensation earned and payable through the date of termination of this Agreement. “Disability” shall have the meaning assigned to such term in
Section 22(e)(3) of the Internal Revenue Code of 1986, as amended. 
 (d) Notwithstanding anything to the
contrary herein contained, Company shall not be required to pay any amounts under this Section 6.3 or elsewhere in this Agreement if the Chisholm Companies are in breach of any of its obligations under this Agreement or any other agreement with
the Company, including without limitation, any obligation relating to the treatment of Company confidential information or any non-compete obligation. 

  
 4 

  
 6.4
Effect of Termination. 
 (a) It is understood that termination of this Agreement shall not relieve a
party hereto from any liability which, at the time of such termination, has already accrued to the other party. The following provisions and all subsections therein shall survive any expiration or termination of this Agreement: Sections 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, and 16. Except as otherwise expressly provided in this Section 6, all other rights and obligations of the parties shall terminate upon termination of this Agreement. 

(b) Any stock options, restricted shares, or other awards held by Chisholm under the 2010 Plan will be governed by the
terms of the 2010 Plan and other governing documents as of the termination date of this Agreement. 
 7. Confidential
Information. 
 7.1. Acknowledgment of Proprietary Interest. As between the parties, the Chisholm
Companies agree that all Confidential Information is a valuable, special and unique asset of the Company’s business (and may constitute “trade secrets” under the Uniform Trade Secrets Act and Texas state law), access to and knowledge
of which are essential to the performance of the Chisholm Companies’ duties hereunder. The Chisholm Companies acknowledge the proprietary interest of the Company in all Confidential Information. The Chisholm Companies agree that all
Confidential Information learned by the Chisholm Companies in connection with the provision of Services or otherwise, whether developed by the Chisholm Companies alone or in conjunction with others or otherwise, is and shall remain the exclusive
property of the Company. The Chisholm Companies acknowledge and agree that its disclosure or use of any Confidential Information in violation of this Section 7 will result in irreparable injury and damage to the Company. 

7.2. Confidential Information Defined. “Confidential Information” means all confidential and
proprietary information of the Company, written, oral or computerized, as it may exist from time to time, including without limitation (i) information derived from reports, investigations, experiments, research and work in progress,
(ii) methods of operation, (iii) market data, (iv) technology, proprietary computer programs and code (in object code and source code format), (v) drawings, designs, plans and proposals, (vi) marketing and sales programs,
(vii) client and supplier lists and any other information about the Company’s relationships with others, (viii) historical financial information and financial projections, (ix) network and system architecture, (x) all other
formulae, patterns, devices or compilations, concepts, ideas, materials and information prepared or performed for or by the Company, and (xi) all information related to the business plan, business, products, purchases or sales of the Company or
any of its suppliers and customers, other than information that is publicly available. 

  
 5 

  
 7.3.
Covenant Not To Divulge Confidential Information. The Company is entitled to prevent the disclosure of Confidential Information. As a portion of the consideration for the hiring of the Chisholm Companies and for the compensation being paid to
the Chisholm Companies by the Company, the Chisholm Companies shall, at all times during the Term and thereafter, hold in strict confidence and shall not disclose or allow to be disclosed to any person, firm or corporation, other than to persons
engaged by the Company to further the business of the Company, and not to use except in the pursuit of the business of the Company, the Confidential Information, without the prior written consent of the Company. This Section 7 shall survive and
continue in full force and effect in accordance with its terms after, and will not be deemed to be terminated by, any termination of this Agreement. 
 7.4. Return of Materials at Termination. In the event of any termination of this Agreement for any reason, the Chisholm Companies shall promptly deliver to the Company all property of the Company,
including without limitation all documents, data and other information containing, derived from or otherwise pertaining to Confidential Information, or, with the permission of the Company, destroy such materials. The Chisholm Companies shall not
take or retain any property of the Company, including without limitation any documents, data or other information, or any reproduction or excerpt thereof, containing, derived from or pertaining to any Confidential Information. The obligation of
confidentiality set forth in this Section 7 shall continue notwithstanding the Chisholm Companies’ delivery of such documents, data and information to the Company. 
 8. Relationship of the Parties. 
 8.1. Independent
Contractor. The Chisholm Companies enter into this Agreement as, and shall continue to be, an independent contractor. The parties agree that no employment relationship, partnership, joint venture or other association shall be deemed created by
this Agreement. Under no circumstances shall either the Chisholm Companies or Chisholm look to the Company as the employer of any of them, or as a partner, agent, or principal. The Chisholm Companies shall not be entitled to any benefits accorded to
the Company’s employees including, without limitation, workers’ compensation, disability insurance, vacation or sick pay. 
 8.2. Tax Obligations. The Chisholm Companies shall have the entire responsibility to discharge any and all of its obligations under federal, state or local laws, regulations or orders now or
hereafter in effect, relating to taxes, unemployment compensation or insurance, social security, workers’ compensation, disability pensions and tax withholdings (the “Tax Obligations”). The Chisholm Companies hereby agree to
indemnify and hold the Company harmless for any and all claims, losses, costs, fees, liabilities, damages or injuries suffered by the Company arising out of the Chisholm Companies’ or Chisholm’s failure to properly discharge the Tax
Obligations. 

  
 6 

  
 9. Certain
Covenants. 
 9.1 Solicitation of Employees, Consultants and Customers. In consideration of the
Company’s obligations under this Agreement and the other consideration recited above, including but not limited to the making of the Awards, the Chisholm Companies agree that, during the Term and for a period of twenty-four months immediately
following the termination of this Agreement (the “Restricted Period”), the Chisholm Companies shall not, either directly or indirectly, either alone or in concert with others, solicit, induce, recruit, encourage or entice, or
attempt to solicit, induce, recruit, encourage or entice, any employee of or consultant to the Company to leave the Company or work for anyone in the businesses in which the Company and its affiliates are engaged at any time during the one-year
period ending on the termination date of this Agreement (“Company Business”). Also, during the Restricted Period, the Chisholm Companies will not directly or indirectly, either for itself or for any other person, firm or
corporation, divert or take away or attempt to divert or take away, call on or solicit or attempt to call on or solicit, any customer of the Company, in connection with any business or activity similar to or related to the Company Business,
including but not limited to those on whom it called or whom it solicited or with whom it became acquainted while engaged by the Company. For purposes of this Section 9.1, any activities engaged in by Chisholm shall be considered activities of
the Chisholm Companies. 
 9.2 Severability. If at any time the provisions of this Section 9 are
determined to be invalid or unenforceable by reason of being vague or unreasonable as to area, duration or scope of activity, this Section 9 shall be considered divisible and shall be immediately amended to only such area, duration or scope of
activity as shall be determined to be reasonable and enforceable by the court or other body having jurisdiction over the matter; and the Chisholm Companies agree that this Section 9 as so amended shall be valid and binding as though any invalid
or unenforceable provision had not been included herein. 
 10. Arbitration. 

10.1 Any dispute regarding any aspect of this Agreement or any act which would violate any provision in this Agreement
(hereafter referred to as “arbitrable dispute”) shall be resolved by an experienced arbitrator licensed to practice law in the State of Texas and selected in accordance with the rules of the American Arbitration Association, as the
exclusive remedy for such dispute. Judgment on any award rendered by such arbitrator may be entered in any court having proper jurisdiction. 
 10.2 Should The Chisholm Companies or the Company institute any legal action or administrative proceeding regarding any dispute or matter covered by this Section by any method other than said arbitration,
the responding party shall be entitled to recover from the other party all damages, costs, expenses and attorneys’ fees incurred as a result of such action. 

  
 7 

  
 11. Severability
and Governing Law. 
 11.1 Should any of the provisions in this Agreement be declared or be determined to be
illegal or invalid, all remaining parts, terms or provisions shall be valid, and the illegal or invalid part, term or provision shall be deemed not to be a part of this Agreement. 

11.2 This Agreement is made and entered into in the State of Texas and shall in all respects be interpreted, enforced and
governed under the laws of Texas without regard to the principles of conflicts of law. 
 12. Proper Construction.

 12.1 The language of all parts of this Agreement shall in all cases be construed as a whole according to its
fair meaning, and not strictly for or against any of the parties. 
 12.2 As used in this Agreement, the term
“or” shall be deemed to include the term “and/or” and the singular or plural number shall be deemed to include the other whenever the context so indicates or requires. 

12.3 The paragraph headings used in this Agreement are intended solely for convenience of reference and shall not in any
manner amplify, limit, modify or otherwise be used in the interpretation of any of the provisions hereof. 
 13. Entire
Agreement. This Agreement is the entire agreement between the Chisholm Companies and the Company and fully supersedes any and all prior agreements or understandings between the parties pertaining to its subject matter, including without
limitation the Employment Agreement. 
 14. Notices. All notices, requests, demands and other communications called for
or contemplated under this Agreement shall be in writing and shall be deemed to have been duly given when personally delivered, on the date of transmission if sent by facsimile, on the third day after mailing if mailed to the party to whom notice is
to be given, by first class mail, postage prepaid, and properly addressed as follows: 
  

			
	If to the Company:	  	2930 West Sam Houston North
		  	Houston, Texas 77043
		
	If to the Protechnics Companies:	  	440 Louisiana
		  	Suite 1818
		  	Houston, Texas 77002

 15.
Amendments. This Agreement may not be amended, supplemented, canceled, or discharged except by written instrument executed by the parties hereto. 

  
 8 

  
 16. Waivers.
All waivers hereunder shall be in writing. No waiver by any party hereto of any breach or anticipated breach of any provision of this Agreement by any other party shall be deemed a waiver of any other contemporaneous, preceding, or succeeding breach
or anticipated breach, whether or not similar, on the part of the same or any other party. 
 [Remainder of Page Intentionally
Left Blank] 

  
 9 

  
 IN WITNESS WHEREOF,
the parties hereto have hereby executed this Agreement as of the day and year first written above. 
  

			
	FLOTEK INDUSTRIES, INC.
		
	By:	 	 /s/ Jesse E. Neyman

	Name:	 	Jesse E. Neyman
	Title:	 	EVP Finance & Strategic Planning
	
	PROTECHNICS II, INC.
		
	By:	 	 /s/ John Chisholm

	Name:	 	John W. Chisholm
	Title:	 	President

  
 10

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