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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. )*

Kilroy Realty Corp

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(Name of Issuer)

Common Stock

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(Title of Class of Securities)

49427F108

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(Cusip Number)

December 31, 2003

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(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

        x Rule 13d-1 (b)

        o Rule 13d-1 (c)

        o Rule 13d-1 (d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the notes).

 

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13G
CUSIP No. 49427F108
	1.	Name of Reporting Person: INVESCO Asset Management Limited			I.R.S. Identification Nos. of above persons (entities only):
	2.	Check the Appropriate Box if a Member of a Group:
		(a)	o
		(b)	x
	3.	SEC Use Only:
	4.	Citizenship or Place of Organization: United Kingdom
Number of Shares Beneficially Owned by Each Reporting Person With
			5.	Sole Voting Power: 0
			6.	Shared Voting Power: 463,160
			7.	Sole Dispositive Power: 0
			8.	Shared Dispositive Power: 1,467,719
	9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 1,467,719
	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares: o
	11.	Percent of Class Represented by Amount in Row (9): 5.23%
	12.	Type of Reporting Person: IA

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13G
CUSIP No. 49427F108
	1.	Name of Reporting Person: INVESCO North American Holdings, Inc.			I.R.S. Identification Nos. of above persons (entities only): IRS # 51-0264787
	2.	Check the Appropriate Box if a Member of a Group:
		(a)	o
		(b)	x
	3.	SEC Use Only:
	4.	Citizenship or Place of Organization: State of Delaware, USA
Number of Shares Beneficially Owned by Each Reporting Person With
			5.	Sole Voting Power: 0
			6.	Shared Voting Power: 1,004,559
			7.	Sole Dispositive Power: 0
			8.	Shared Dispositive Power: 1,467,719
	9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 1,467,719
	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares: o
	11.	Percent of Class Represented by Amount in Row (9): 5.23%
	12.	Type of Reporting Person: HC

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INVESCO North American Holdings, Inc. (“INAH”) is a holding company many of whose direct and indirect wholly owned subsidiaries engage in investment advisory services for investment companies and other clients. INAH is reporting solely on behalf of the subsidiaries listed on Exhibit 1 (the “INAH Subsidiaries”) and not on behalf of other subsidiaries who may file separately on Schedule 13G. INVESCO Asset Management Limited (“IAML”) is an investment adviser that is affiliated with INAH. Both INAH and IAML are indirect wholly owned subsidiaries of AMVESCAP PLC.

The INAH Subsidiaries exercise voting power with respect to securities over which they have investment discretion jointly but exercise dispositive power with respect to such securities independently of each other. Additionally, the INAH subsidiaries, on the one hand, and IAML, on the other, exercise voting and dispositive power independently of each other. Notwithstanding the foregoing, pursuant to Securities Exchange Act Release No. 34-39538 (January 12, 1998), INAH and IAML believe that attribution of the securities over which the INAH Subsidiaries and IAML have investment discretion should be reported on an aggregated basis for purposes of this Schedule 13G.

 

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     By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

 

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SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information in this statement is true, complete and correct.

Date: February 17, 2004

INVESCO NORTH AMERICAN HOLDINGS, INC.

February 17, 2004
(Date)

By: Jeffrey Kupor
(Signature)

Assistant Secretary
(Name/Title)

INVESCO ASSET MANAGEMENT, LIMITED

February 17, 2004
(Date)

By: Michael S. Perman
(Signature)

Group Company Secretary
(Name/Title)

 

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Exhibit 1

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company

 

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Exhibit 2

Agreement of Joint Filing

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agrees to the joint filing with each other of the attached statement on Schedule 13G and to all amendments to such statement and that such statement and all amendments to such statements are made on behalf of each of them.

IN WITNESS WHEREOF, each of the undersigned hereby executes this Agreement as of February 17, 2004.

INVESCO NORTH AMERICAN HOLDINGS, INC.

February 17, 2004

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(Date)

By:  Jeffrey Kupor

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(Signature)

Assistant Secretary

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(Name/Title)

INVESCO ASSET MANAGEMENT, LIMITED

February 17, 2004

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(Date)

By:  Michael S. Perman

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(Signature)

Group Company Secretary

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(Name/Title)