Amendment to letter confirmation dated April 4, 2007



 Exhibit 10.2 
 April 4, 2007 
 To: Kilroy Realty, L.P. 
 12200 W. Olympic Boulevard, Suite 200 
 Los Angeles, California 90064

 Attention: Richard E. Moran 
                  EVP and CFO 
 Telephone No.:
 (310) 481-8400 
 Facsimile No.:   (310) 481-6500 
 From: Bank of America, N.A.  
 c/o Banc of America Securities LLC 
 Equities Legal Department 
 9 West 57th Street, 40th Floor 
 New York, NY 10019 
 Attention:
          John Servidio 
 Telephone No.:  212-583-8373 
 Facsimile No.:   212-230-8610 
 Re: Capped Call Transaction
(Transaction Reference Number: NY-28486) Amendment 
 The purpose of this letter agreement (the “Amendment”) is to amend
the terms and conditions of the call option (the “Transaction”) entered into among Bank of America, N.A. (“BofA”), Kilroy Realty, L.P. (“Counterparty”) and Kilroy Realty Corporation
(“Parent”) pursuant to a letter agreement (the “Confirmation”) dated March 27, 2007, pursuant to which Counterparty and Parent purchased from BofA a Number of Options equal to 133,333 in connection with the
issuance by Counterparty of $400,000,000 principal amount of 3.250% Exchangeable Senior Notes due 2012 (the “Initial Exchangeable Notes”) under the Indenture to be dated April 2, 2007 among Counterparty, Parent, as guarantor,
and U.S. Bank National Association, as trustee. This Amendment relates to, and sets forth the terms of, the purchase by Counterparty from BofA of an additional number of Options (the “Additional Number of Options”) in connection
with the issuance by Counterparty of an additional $60,000,000 principal amount of 3.250% Exchangeable Senior Notes due 2012 (the “Additional Exchangeable Notes” and, together with the Initial Exchangeable Notes, the
“Exchangeable Notes”) to the initial purchasers of the Exchangeable Notes as a result of their exercise of the right granted with respect to such Additional Exchangeable Notes pursuant to the Purchase Agreement dated March 27,
2007. 
 Upon the effectiveness of this Amendment, all references to “Number of Options” and “Transaction” in the
Confirmation, as amended, will include the Additional Number of Options purchased by Counterparty and Parent pursuant to the terms set forth below, all references to “Exchangeable Notes” will include the Additional Exchangeable Notes and,
except to the extent specified below, all other provisions of the Confirmation shall apply to the Additional Number of Options as if such Additional Number of Options were originally subject to the Confirmation. Capitalized terms used herein without
definition shall have the meanings assigned to them in the Confirmation. 
 Amendments. The terms relating to the purchase of the Additional Number of
Options are as follows: 
 1. The “Trade Date” with respect to the Additional Number of Options will be April 4, 2007. 
 2. The “Number of Options” for the Transaction will be “153,333” reflecting an addition of 20,000 Additional Number of Options. 
 3. An additional “Premium” to be determined by the Calculation Agent will be payable by the Counterparty to BofA in respect of the Additional Number of
Options (the “Additional Call Option Premium”) on a Currency Business Day to be specified by the Calculation Agent (such date, the “Additional Call Option Premium Payment Date”), by written notice to the
Counterparty in substantially the form of the pricing 








 
supplement set forth in Exhibit A hereto (the “Pricing Supplement”) no later than one Currency Business Day prior to the Additional Call
Option Premium Payment Date. 
 4. Repeated Representations. Counterparty and Parent hereby repeat the representations, warranties and agreements
contained in the Confirmation with respect to the Amendment or with respect to the Confirmation, as amended by the Amendment, as the context requires. 
 5.
Rule 10b-18. The Counterparty further represents that, except as disclosed in writing by the Counterparty or Parent to BofA or as described in the offering memorandum relating to the Exchangeable Notes, neither the Counterparty, Parent nor
any of their affiliated purchasers have purchased any Shares (as contemplated by Rule 10b-18 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) during each of the four calendar weeks preceding the date
hereof. The Counterparty and Parent further covenant and agree that neither it nor any of its affiliated purchasers will purchase any Shares prior to the earlier of the Additional Call Option Premium Payment Date and the Early Unwind Date (as
defined below). 
 6. Conditionality and Early Unwind. The respective obligations of the parties hereunder shall become final and binding only if no
Early Unwind Event (as defined below) shall have occurred and be continuing as of the Early Unwind Date (as defined below). Notwithstanding the foregoing, the Counterparty, Parent and BofA, intending to be legally bound, hereby acknowledge and agree
that in the event that an Early Unwind Event has occurred and is continuing on the Early Unwind Date, BofA or one or more of its affiliates, shall terminate its hedging activities with respect to the portion of the Transaction contemplated by this
Amendment on the Early Unwind Date and each party shall be released and discharged by the other parties from, and agrees not to make any claim against the other parties with respect to, any obligations or liabilities of the other parties arising out
of and to be performed in connection with such portion of the Transaction; provided that, if such Early Unwind Event results from a breach by the Counterparty or Parent of any representation of or any undertaking by the Counterparty or
Parent, as applicable, contained in the Purchase Agreement and relating to the issuance by the Counterparty of the Additional Exchangeable Notes, the Counterparty or Parent shall purchase from BofA on the Early Unwind Date any Shares purchased by
BofA or one or more of its affiliates in connection with the portion of the Transaction contemplated by this Amendment and reimburse BofA for any costs or expenses (including market losses) relating to the unwinding of its reasonable hedging
activities in connection with such portion of the Transaction (including any losses or costs incurred as a result of its terminating, liquidating, obtaining or reestablishing any reasonable hedge or related trading position). The amount of any such
reimbursement shall be determined by BofA in its reasonable good faith discretion. BofA shall notify the Counterparty and Parent of such amount, including, upon the Counterparty’s or Parent’s request, an explanation of the basis of
determination of such amount, and the Counterparty or Parent shall pay such amount in immediately available funds on the Early Unwind Date. 
 For purposes
of the foregoing: (i) an “Early Unwind Event” means (a) the failure to close the Additional Exchangeable Notes issuance by the Early Unwind Date for any reason whatsoever or (b) the failure of the Counterparty or
Parent to comply with any representations, warranties or undertakings contained in this Amendment; and (ii) an “Early Unwind Date” means the later of (i) April 11, 2007 (or such later date as agreed upon by the
parties) or (ii) the Additional Call Option Premium Payment Date. 
 7. No Additional Amendments or Waivers. Except as amended hereby, all the
terms of the Transaction and provisions in the Confirmation shall remain and continue in full force and effect and are hereby confirmed in all respects. 
 8. Counterparts. This Amendment may be signed in any number of counterparts, each of which shall be an original, with the same effect as if all of the signatures thereto and hereto were upon the same instrument. 
 9. Governing Law. The provisions of this Amendment shall be governed by the New York law (without reference to choice of law doctrine). 







 Counterparty hereby agrees (a) to check this Amendment carefully and immediately upon receipt so
that errors or discrepancies can be promptly identified and rectified and (b) to confirm that the foregoing (in the exact form provided by BofA) correctly sets forth the terms of the agreement between BofA, Counterparty and Parent with respect
to the Transaction, by manually signing this Amendment or this page hereof as evidence of agreement to such terms and providing the other information requested herein and immediately returning an executed copy to John Servidio at Banc of America
Securities LLC, Facsimile No. 212-230-8610. 
  

					
	Yours faithfully,
	
	Bank of America, N.A.
		
	By:	 	/s/ Christopher Hutmaker
		 	Name:	 	Christopher Hutmaker
		 	Title:	 	Principal


 Accepted and confirmed 
 as of the Trade Date: 
 Kilroy Realty, L.P. 
  

							
	By	 	Kilroy Realty Corporation
		 	its General Partner
			
		 	By:	 	/s/ Tyler Rose
		 		 	Name:	 	Tyler Rose
		 		 	Title:	 	SVP & Treasurer

  

							
			
		 	By:	 	/s/ Heidi R. Roth
		 		 	Name:	 	Heidi R. Roth
		 		 	Title:	 	Senior Vice President and Controller

 Kilroy Realty Corporation 
  


							
			
		 	By:	 	/s/ Tyler Rose
		 		 	Name:	 	Tyler Rose
		 		 	Title:	 	SVP & Treasurer

  

							
			
		 	By:	 	/s/ Heidi R. Roth
		 		 	Name:	 	Heidi R. Roth
		 		 	Title:	 	Senior Vice President and Controller








 EXHIBIT A 
 PRICING SUPPLEMENT 
 April [    ], 2007 
 To: Kilroy Realty, L.P. 
 12200 W. Olympic Boulevard, Suite 200

 Los Angeles, California 90064 
 Attention: Richard E. Moran

                  EVP and CFO 
 Telephone No.:  (310) 481-8400 
 Facsimile No.:   (310)
481-6500 
 From: Bank of America, N.A.  
 c/o Banc of
America Securities LLC 
 Equities Legal Department 
 9 West 57th Street, 40th Floor 
 New York, NY 10019 
 Attention:
          John Servidio 
 Telephone No.:  212-583-8373 
 Facsimile No.:   212-230-8610 
 Mr. Moran: 
 This letter is a Pricing Supplement within the meaning of the letter of amendment dated as of April 4, 2007 (the “Amendment”) to
the confirmation letter dated as of March 27, 2007 (the “Confirmation”) among Bank of America, N.A., Kilroy Realty, L.P. and Kilroy Realty Corporation. Capitalized terms used herein have the meanings set forth in the
Confirmation. 
 This Pricing Supplement relates to the portion of the Transaction described in the Amendment. Upon the terms and subject to
the conditions of the Amendment, certain terms shall be as follows: 
  

			
	1. Additional Call Option Premium:	  	[_________________]
	2. Additional Call Option Premium Payment Date:	  	[_________________]

 Very truly yours, 
  

			
	Bank of America, N.A.
		
	By:	 	  
	Authorized Signatory
	Name:	 	


 Accepted and confirmed 
 as of the Trade Date: 
 Kilroy Realty, L.P. 
  

					
	By	 	Kilroy Realty Corporation
		 	its General Partner
			
		 	By:	 	  
		 		 	Name:
		 		 	Title:

  

					
			
		 	By:	 	  
		 		 	Name:
		 		 	Title:








 Kilroy Realty Corporation 
  

					
			
		 	By:	 	  
		 		 	Name:
		 		 	Title:

  

					
			
		 	By:	 	  
		 		 	Name:
		 		 	Title: