Document:

Exhibit 10.28

 Exhibit 10.28 
 FIRST AMENDMENT TO LOAN DOCUMENTS 
 October 24, 2007 
 THIS FIRST AMENDMENT TO LOAN AGREEMENT (this “Amendment”) is made as of this 24th day of October, 2007 (the “Effective
Date”) by LEHMAN BROTHERS HOLDINGS INC., a Delaware corporation (individually and as lead arranger and administrative agent for itself and certain co-lenders), having an address at 399 Park Avenue, 8th Floor, New York, New York 10022
(“Lender”), TARANTULA VENTURES LLC, a Delaware limited liability company having an address at 1212 New York Avenue, N.W., Suite 900, Washington, D.C., 20005. 
 R E C I T A L S: 
 A.    Pursuant to that certain Loan Agreement dated as of February 28, 2007 by and between Borrower and Lender (the “Original Loan Agreement”), Borrower executed and delivered to Lender that certain
Promissory Note dated as of February 28, 2007, payable to the order of Lender in the stated principal amount of $30,144,376.00, which Note evidences a loan in the same amount made by Lender to Borrower (the “Loan”); 

B.    Borrower has requested Lender’s consent to certain Transfers associated with the formation transactions (collectively,
the “Public Offering Formation Transactions”) described in the REIT’s form S-11 registration statement as filed with the Securities and Exchange Commission on August 9, 2007, and as subsequently amended. 
 C.    In connection with the Public Offering Formation Transactions, Borrower has requested that Lender (i) release Lammot J. du
Pont and Hossein Fateh as Guarantors under the Loan, and accept DuPont Fabros Technology, L.P. as a replacement Guarantor under the Loan, and (ii) enter into this Amendment to provide for certain modifications to the Original Loan Agreement.

 D.    Lender has agreed to modify the Original Loan Agreement as set forth herein under the terms and conditions
provided herein. The Original Loan Agreement, as modified by this Amendment, is hereinafter referred to as the “Loan Agreement”. 
 NOW, THEREFORE, in consideration of the covenants contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Lender and Borrower, intending to be legally bound, do hereby
covenant and agree as follows: 
 1.    Recitals and Definitions. The recitals set forth herein are true and
accurate and are incorporated herein by reference. Capitalized terms which are not specifically defined herein shall have the meanings set forth in the Loan Agreement. 
 2.    Amendments to Original Loan Agreement. 
 a. The following terms defined in
Schedule I of the Original Loan Agreement are hereby deleted in their entirety and the following substituted in lieu thereof: 

         (i)    “Environmental Indemnity” shall mean that certain Environmental and Hazardous Substances Indemnification Agreement dated as of October 24, 2007,
executed by each of Borrower and Guarantor, in connection with the Loan for the benefit of Lender, as the same may be amended, restated, replaced, supplemented or otherwise modified from time to time. 
         (ii)    “Guarantor” shall mean DuPont Fabros
Technology, L.P., a Maryland limited partnership. 
         (iii)    “Guaranty of Recourse Obligations” shall mean that certain Guaranty of Recourse Obligations dated as of October 24, 2007 executed by Guarantor in
favor of Lender, as the same may be amended, restated, replaced, supplemented or otherwise modified from time to time. 
         (iv)    “Permitted Transfer” shall mean a Transfer or Transfers of shares of capital stock in DuPont Fabros Technology, Inc. (“REIT”).

 b. The following Sections of the Original Loan Agreement are hereby amended as follows: 
 (1)    Section 5.22(c) is hereby deleted in its entirety. 
 (2)    The last sentence of Section 5.22(d) is hereby deleted in its entirety, and the following sentence is inserted in lieu
thereof: 
 “Notwithstanding anything to the contrary contained in this Section 5.22, no Transfer of the Property (or any
direct interests in Borrower, Tarantula Interests LLC, or Safari Ventures LLC) shall be made to any Prohibited Person.” 
 (3) The
following sentence is added to the end of Section 5.22(g): 
 “The provisions of this Section 5.22(g) shall not apply to
Permitted Transfers.” 
 (4) Section 9.4 of the Original Loan Agreement is hereby deleted in its entirety, and the following
sentence is inserted in lieu thereof: 
 “9.4 Guarantor Bankruptcy. Notwithstanding anything to the contrary in this
Agreement, a voluntary bankruptcy filing by Guarantor shall not constitute an Event of Default hereunder provided that Borrower replaces such Guarantor with a Person acceptable to Lender in its sole discretion; provided the Loan is not otherwise in
Default and remains in full force and effect.” 
 (5) The definitions of “Net Liquid Assets”, “Property Manager”
and “Tangible Net Worth” contained in Schedule I of the Original Loan Agreement are hereby deleted in their entirety. 
  

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 3.    Ownership Chart. Attached hereto as Exhibit A is a true, correct
and complete copy of an ownership chart depicting the current ownership structure of Borrower, each constituent partner or member of Borrower (including their respective ownership interests, direct or indirect, and capital contributions), which
chart shall identify each Person who owns or controls, directly or indirectly, any such partner or member of Borrower. 
 4.    Confirmation of Representations and Warranties. Borrower hereby represents and warrants to Lender that each of the representations and warranties of Borrower contained in the Loan Documents to which it is a
party are true, correct and complete as of the date hereof and apply to the execution and delivery of this Amendment and any other documents executed in connection herewith. 
 5.    No Defenses. Borrower hereby acknowledges, confirms and warrants to Lender that as of the date of this Amendment,
Borrower has no defenses, claims, rights of set-off or counterclaims against Lender under, arising out of, or in connection with any of the Loan Documents or against any of the indebtedness evidenced, advanced or secured thereby, any and all of
which Borrower hereby expressly waives. 
 6.    Confirmation of Lien. Borrower acknowledges and agrees that the
Security Instrument constitutes a valid first lien upon the Property in favor of Lender and that the Loan Documents constitute valid and binding agreements and obligations of the parties thereto with respect to the Loan. The Property is and shall
remain subject to and encumbered by the lien, charge and encumbrance of the Security Instrument and nothing herein shall affect or be construed to affect the lien, charge or encumbrance of the Security Instrument or the priority thereof or of this
Amendment over other liens or encumbrances. 
 7.    No Oral Modification. This Amendment may not be amended
except upon the written agreement of all of the parties hereto. 
 8.    Ratification. Except as expressly
modified and amended herein, Borrower covenants and agrees that all of the terms, covenants, promises, warranties, representations and conditions of the Loan Agreement and the other Loan Documents shall remain in full force and effect with respect
to the Borrower. Borrower hereby ratifies and confirms each of its obligations under the Note, the Loan Agreement, as modified hereby, and each of the other Loan Documents. 
 9.    Binding Upon Successors and Assigns. This Amendment shall inure to the benefit of, and shall be binding upon, the
parties hereto and their respective successors and permitted assigns under the Loan Agreement. 
 10.    Headings.
The headings of the sections and subsections of this Amendment are for convenience of reference only and shall not be considered a part hereof nor shall they be deemed to limit or otherwise affect any of the terms or provisions hereof. 

11.    Validity of Provisions. Any provision of this Amendment which may prove unenforceable under law shall not affect the
validity of the other provisions hereof. 
  

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 12.    Judicial Interpretation. Should any provision of this Amendment, the
Loan Agreement or any of the other Loan Documents require judicial interpretation, it is agreed that a court interpreting or construing the same shall not apply a presumption that the terms hereof shall be more strictly construed against any party
by reason of the rule of construction that a document is to be construed more strictly against the party who itself or through its agent prepared the same, it being agreed that all parties hereto have participated in the preparation of this
Amendment. 
 13.    Time; Construction; Exhibits and Schedules. Time is of the essence with respect to each
provision of this Amendment. All references to the singular or plural number or masculine, feminine or neuter gender shall, as the context requires, include all others. All references to sections, paragraphs, and exhibits are to this Amendment
unless otherwise specifically noted. The use of the words “hereof”, “hereunder”, “herein” and words of similar import shall refer to this entire Amendment and not to any particular section,
paragraph or portion of this Amendment unless otherwise specifically noted. All exhibits attached hereto are by this reference made a part of this Amendment for all purposes. 
 14.    Counterparts. This Amendment may be executed in any number of counterparts, each of which shall be deemed an original
but all of which shall constitute one agreement. It shall not be necessary for the same counterpart to be signed by all of the parties in order for this instrument to be fully binding upon any party signing at least one counterpart. 
 15.    Governing Law. This Amendment shall be governed, construed, applied and enforced in accordance with the laws of the
State of New York, without regard to the principles of conflicts of laws. 
 16.    Conflicting Provisions. In the
event of any conflict between this Amendment and the terms of the Note or any of the other Loan Documents, the terms of this Amendment shall govern and control. Whenever possible, the provisions of this Amendment shall be deemed supplemental to and
not in derogation of the terms of the Note, the Loan Agreement and the other Loan Documents. 
 17.    Entire
Agreement. This Amendment and the documents executed and delivered in connection herewith constitute the entire agreement among the parties with respect to the subject matter hereof, and all understandings (oral or written) and agreements
heretofore had among the parties are merged in or contained in this Amendment and such documents. 
 18.    Facsimile
Execution. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or electronic mail transmission shall be effective as delivery of a manually executed counterpart of this Amendment. 
 19.    Waiver of Jury Trial. THE LENDER AND BORROWER HEREBY KNOWINGLY, VOLUNTARILY, AND INTENTIONALLY FOREVER WAIVE THE RIGHT
TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON THIS AMENDMENT OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AMENDMENT, THE LOAN AGREEMENT, THE NOTE OR ANY OTHER DOCUMENTS EXECUTED IN CONJUNCTION HEREWITH OR THEREWITH 

  

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OR ANY COURSE OF CONDUCT, COURSE OF DEALINGS, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF ANY PARTY OR THE EXERCISE BY ANY PARTY OF ITS RIGHTS UNDER
THIS AMENDMENT OR ANY OF THE OTHER LOAN DOCUMENTS OR IN ANY WAY ARISING OUT OF OR RELATED IN ANY MANNER WITH THE SUBJECT MATTER HEREOF OR THEREOF (INCLUDING, WITHOUT LIMITATION, ANY ACTION TO RESCIND OR CANCEL THIS AMENDMENT OR ANY OF THE LOAN
DOCUMENTS AND ANY CLAIM OR DEFENSE ASSERTING THAT THIS AMENDMENT OR ANY OTHER LOAN DOCUMENT WAS FRAUDULENTLY INDUCED OR IS OTHERWISE VOID OR VOIDABLE). BORROWER ACKNOWLEDGES THAT THIS WAIVER IS A MATERIAL INDUCEMENT FOR LENDER TO ENTER INTO AND
ACCEPT THIS AMENDMENT. 
 [SIGNATURES APPEAR ON THE FOLLOWING PAGE] 
  

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

			
	BORROWER:
	
	 TARANTULA VENTURES LLC,
 a Delaware
limited liability company

		
	By:	 	 Tarantula Interests LLC,
a Delaware limited liability company,
its Managing Member

  

			
	By:	 	 Safari Ventures LLC,
a Delaware limited liability company,
its Managing Member

  

			
	By:	 	 DuPont Fabros Technology, Inc.,
a Maryland corporation,
its Managing Member

  

			
		
	By:	 	/s/ Hossein Fateh
		 	 Hossein Fateh,
 Chief Executive
Officer

  

			
	LENDER:
	
	 LEHMAN BROTHERS HOLDINGS INC.,
 a
Delaware corporation (individually and as lead arranger and administrative agent for itself and
certain co-lenders)

		
	By:	 	/s/ Massoud Bhatti
	 Name:
	 	Massoud Bhatti
	 Title:
	 	Authorized Signatory

 Exhibit A 
 OWNERSHIP CHART 
 (see attached)Exhibit 10.29

 Exhibit 10.29 
 INDEMNITY AGREEMENT 
 THIS INDEMNITY
AGREEMENT (this “Agreement”), is made as of this 24th day of October, 2007, by LAMMOT J. DU PONT and HOSSEIN FATEH
(“Indemnitors”) for the benefit of DUPONT FABROS TECHNOLOGY, INC., a Maryland corporation, and DUPONT FABROS TECHNOLOGY, L.P., a Maryland limited partnership (the “OP”) (collectively, the “Indemnitees”).

 W I T N E S S E T H: 
 WHEREAS, Grizzly Ventures LLC, a Delaware limited liability company (“Grizzly Ventures”) owns certain real property located in Ashburn Corporate Center, Ashburn, Virginia improved with a data center facility known as ACC4
(“ACC4”); 
 WHEREAS, Grizzly Equity LLC, a Delaware limited liability company (“Grizzly Equity”) is the sole member of
Grizzly Ventures and Grizzly Interests LLC, a Delaware limited liability company (“Grizzly Interests”) is the sole member of Grizzly Equity; 
 WHEREAS, pursuant to the Agreement and Plan of Merger dated as of August 9, 2007 between Grizzly Interests and the Indemnitees, Grizzly Interests is to be merged with and into the OP with the OP surviving;

 WHEREAS, Indemnitors are principal owners of Grizzly Interests; 
 WHEREAS, to induce Indemnitees to proceed with the aforementioned merger, Indemnitors have agreed to provide this Agreement for Indemnitees’
benefit. 
 NOW, THEREFORE, for and in consideration of the sum of Ten and No/100 ($10.00) Dollars and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, Indemnitees, by their acceptance of delivery hereof, and Indemnitors hereby agree as follows: 
 1.    Indemnity Agreement.    Indemnitors, each jointly and severally, covenant and agree, at their sole cost and expense, to indemnify, and hold the Indemnitees harmless
against and from any and all civil penalties and charges (“Indemnified Costs”) which may at any time be imposed upon, incurred by or assessed against the Indemnitees by the Virginia Department of Environmental Quality (“DEQ”)
directly arising out of or resulting from DEQ’s factual observations cited in that certain notice of violation dated October 5, 2007 issued by DEQ with respect to ACC4, together with reasonable attorneys’ fees and disbursements
incurred in the collection of the Indemnified Costs. 
 2.    Counterparts.    This Agreement
may be executed in one or more counterparts, each of which shall be deemed an original. Said counterparts shall constitute but one and the same instrument and shall be binding upon each of the undersigned individually as 

 
fully and completely as if all had signed by one instrument so that the joint and several liability of each of the undersigned hereunder shall be unaffected
by the failure of any of the undersigned to execute any or all of the said counterparts. 
 3.    Notices.    Whenever under this Agreement it becomes necessary to give notice, such notice shall be in writing, signed by the party or parties giving or making the same, and shall be
served on the person or persons for whom it is intended or who should be advised or notified, by Federal Express or other similar overnight service or by certified or registered mail, return receipt requested, postage prepaid and addressed to such
party at the address set forth below or at such other address as may be designated by such party by like notice: 
  

	 	Indemnitees:	DuPont Fabros Technology, L.P. 

	 	 	1212 New York Avenue, N.W., Suite 900 

	 	 	Washington, D.C. 20005 

	 	 	Attention: Hossein Fateh 

  

	 	Indemnitors:	Lammot J. du Pont 

	 	 	Hossein Fateh 

	 	 	1212 New York Avenue, N.W., Suite 900 

	 	 	Washington, D.C. 20005 

 4.    Amendments.    No provision of this Agreement may be changed, waived, discharged or terminated orally, by telephone or by any other means except by an instrument in writing signed by the
party against whom enforcement of the change, waiver, discharge or termination is sought. 
 5.    Effect.    Except as herein provided, this Agreement shall be binding upon each of the Indemnitors and their respective successors, successors-in-title and assigns, and shall inure to the
benefit of the Indemnitees, and their respective successors and assigns, provided, however, that this Agreement shall terminate and be of no further force and effect upon the sale, conveyance or other transfer of ACC4, or substantially all of the
interests in ACC4 by the OP or any of its affiliates. 
 6.    GOVERNING LAW; CONSENT TO
JURISDICTION.    THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL IN ALL RESPECTS BE GOVERNED BY, AND INTERPRETED AND DETERMINED IN ACCORDANCE WITH, THE LAWS OF THE COMMONWEALTH OF VIRGINIA.

 [Remainder of Page Intentionally Left Blank] 
  

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 IN WITNESS WHEREOF, Indemnitors have caused this Agreement to be executed under seal as of the day and
year fist written above. 
  

	
	INDEMNITORS:
	
	/s/ Lammot J. du Pont
	Lammot J. du Pont
	
	/s/ Hossein Fateh
	Hossein Fateh

  

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