Kilroy Realty (KRC)

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On July 24, 2006, the Company issued a press release announcing its earnings for the quarter ended June 30, 2006 and distributed certain supplemental information. The supplemental information is attached to this report as Exhibit 99.1, and the press release is attached to this report as Exhibit 99.2.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(d) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On May 12, 2006, Kilroy Realty Corporation (the “Company”) completed its public offering of 2.0 million shares of its common stock, par value $0.01 per share, at an initial offering price to the public of $69.50 per share. The underwriting agreement, dated May 9, 2006, entered into in connection with the offering is filed herewith as Exhibit 1.1, and the Company’s press release, dated May 10, 2006, relating to the offering is filed herewith as Exhibit 99.1. Each of these exhibits is incorporated herein by this reference.

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Kilroy Realty Corporation (the “Company”) is re-issuing its historical consolidated financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2005 (“Form 10-K”), and the accompanying selected financial data, in connection with the provisions of Statement of Financial Accounting Standards No. 144, Accounting for the Impairment or Disposal of Long-Lived Assets (“SFAS 144”). The Company is also re-issuing the Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) that accompanied those consolidated financial statements. During the quarter ended March 31, 2006, the Company sold one property and, in compliance with SFAS 144, has reported revenue and expenses for each period presented and the gain on sale from this property during the quarter ended March 31, 2006 as discontinued operations in its quarterly report for the fiscal quarter ended March 31, 2006, which was filed subsequent to the date of the sale. Under SEC requirements, the same reclassification as discontinued operations required by SFAS 144 following the sale of properties is required for previously issued annual financial statements for each of the years presented in the Company’s last Form 10-K if those financials are incorporated by reference in subsequent filings with the SEC made under the Securities Act of 1933, as amended, even though those financial statements related to periods prior to the date of sale. These reclassifications had no effect on the Company’s reported net income available to common stockholders and did not have a material effect on the Company’s results of operations or financial condition.

This Current Report on Form 8-K updates Items 6, 7 and 8 of the Company’s Form 10-K, including the financial statements therein, to reflect the property sold during the three months ended March 31, 2006 as discontinued operations. The updated financial information is attached to this Current Report on Form 8-K as Exhibit 99.1. All other items of the Form 10-K remain unchanged. Except as expressly noted above, the information contained in this report has not been updated to reflect any developments since December 31, 2005.

(c) Exhibits:

The exhibits required by this item are set forth on the Exhibit Index attached hereto.

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On April 24, 2006, the Company issued a press release announcing its earnings for the quarter ended March 31, 2006 and distributed certain supplemental information. The supplemental information is attached to this report as Exhibit 99.1, and the press release is attached to this report as Exhibit 99.2.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On January 30, 2006, the Company issued a press release announcing its earnings for the year ended December 31, 2005 and distributed certain supplemental information. The supplemental information is attached to this report as Exhibit 99.1, and the press release is attached to this report as Exhibit 99.2.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On October 31, 2005, the Company issued a press release announcing its earnings for the quarter ended September 30, 2005 and distributed certain supplemental information. The supplemental information is attached to this report as Exhibit 99.1, and the press release is attached to this report as Exhibit 99.2.

On October 25, 2005, the Company reported on Form 8-K that it would restate previously issued financial statements for the fiscal years ended December 31, 2002, 2003 and 2004 and the quarters ended March 31, 2005 and June 30, 2005. As previously reported, the restatement is necessary because the Company has determined that designation documentation related to six interest rate swap and two interest rate cap agreements entered into during 2000 and 2002 does not meet the technical requirements under Statement of Financial Accounting Standards No. 133, “Accounting for Derivative Instruments and Hedging Activities” (“SFAS 133”) to qualify for hedge accounting. As a result, the Company is required to restate prior period financial statements to mark these instruments to market and to recognize the impact of this mark-to-market adjustment in the statement of operations for each period, rather than through other comprehensive income.

In addition, the Company previously reported that it would restate the financial statements to record a capital asset and related depreciation for leasehold improvements constructed by the Company that are reimbursed by tenants with a corresponding liability to deferred revenue, which will be amortized into rental revenue over the lives of the related leases. In connection with the restatement, certain other immaterial adjustments will also be recorded. In follow-up to the previously filed report, the Company today is filing selected financial information disclosing the effects of the adjustments made in connection with the pending restatements to the Company’s consolidated balance sheets, consolidated statements of operations and other financial data. The selected financial information is attached to this report as Exhibit 99.3 and is incorporated by reference into this report. The Company will be filing amendments to its Annual Report on Form 10-K/A for the year ended December 31, 2004 and its Quarterly Reports on Form 10-Q/A for the quarters ended March 31, 2005 and June 30, 2005 to reflect the restatements described above.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On July 25, 2005, the Company issued a press release announcing its earnings for the quarter ended June 30, 2005 and made publicly available certain supplemental information. The supplemental information is attached to this current report as Exhibit 99.1, and the press release is attached to this current report as Exhibit 99.2.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On April 25, 2005, the Company issued a press release announcing its earnings for the quarter ended March 31, 2005 and made publicly available certain supplemental information. The supplemental information is attached to this current report as Exhibit 99.1, and the press release is attached to this current report as Exhibit 99.2, and each are incorporated by reference to this report.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On January 31, 2005, the Company issued a press release announcing its earnings for the quarter ended December 31, 2004 and made publicly available certain supplemental information. The supplemental information is attached to this current report as Exhibit 99.1, and the press release is attached to this current report as Exhibit 99.2, and each are incorporated by reference to this report.

List below the financial statements, pro forma financial information and exhibits, if any, filed as a part of this report.

(c) Exhibits.

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.