UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): August 10, 2012

CORPORATE PROPERTY ASSOCIATES 15 INCORPORATED

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code: (212) 492-1100

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:

Item 7.01 Regulation FD Disclosure.

On August 10, 2012, the registrant made available certain supplemental unaudited financial information at June 30, 2012. A copy of this supplemental information is attached as Exhibit 99.1.

The information furnished pursuant to this “Item 7.01 Regulation FD Disclosure,” including Exhibit 99.1, shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit 99.1 Supplemental information of the registrant at June 30, 2012.

Cautionary Statement Concerning Forward-Looking Statements:

On February 17, 2012, Corporate Property Associates 15 Incorporated (“CPA^®:15”) and W. P. Carey & Co. LLC (“W. P. Carey”) announced that they had agreed to combine their businesses through a merger pursuant to an Agreement and Plan of Merger (the “Merger”), and that W. P. Carey intended to convert into a real estate investment trust through a series of related transactions. The consummation of the proposed Merger and related transactions is subject to certain conditions, including among other things, receipt of the requisite shareholder approvals, and there can be no assurance that the Merger and related transactions will be consummated.

Certain of the matters discussed in this communication constitute forward-looking statements within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, both as amended by the Private Securities Litigation Reform Act of 1995. The forward-looking statements include, among other things, statements regarding the intent, belief or expectations of CPA^®:15 and can be identified by the use of words such as “may,” “will,” “should,” “would,” “assume,” “outlook,” “seek,” “plan,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” “forecast,” and other comparable terms. These statements are based on the current expectations of the management of CPA^®:15 and W. P. Carey. It is important to note that CPA^®:15’s actual results could be materially different from those projected in such forward-looking statements. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements including, without limitation, risks and uncertainties related to the Merger. Other unknown or unpredictable factors could also have material adverse effects on future results, performance or achievements of the combined company. Discussions of some of these other important factors and assumptions are contained in CPA^®:15’s and W. P. Carey’s filings with the Securities and Exchange Commission (the “SEC”) and are available at the SEC’s website at http://www.sec.gov, including the Joint Proxy Statement/Prospectus filed by CPA^®:15 and W. P. Carey in respect of the Merger and related transactions. In light of these risks, uncertainties, assumptions and factors, the forward-looking events discussed in this communication may or may not occur. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this communication. Except as required under the federal securities laws and the rules and regulations of the SEC, CPA^®:15 does not undertake any obligation to release publicly any revisions to the forward-looking statements to reflect events or circumstances after the date of this communication or to reflect the occurrence of unanticipated events.

Additional Information About The Proposed Merger:

CPA^® :15 stockholders are urged to read the Joint Proxy Statement/Prospectus and other materials related to the Merger which were filed by CPA^®:15 with the SEC. These documents contain important information, which should be read carefully before any decision is made with respect to the proposed Merger. As these documents are filed with the SEC, they become available for free at the SEC’s website (www.sec.gov). These documents will also be available for free by accessing CPA^®:15’s website (www.cpa15.com). CPA^®:15 and certain of its executive officers and members of management may be deemed to be participants in the solicitation of stockholders in connection with the proposed Merger and related transactions. Information regarding CPA^®:15’s executive officers and directors is available in its annual report on Form 10-K filed with the SEC by CPA^®:15 on March 5, 2012. Investors may also obtain information regarding the persons who may, under the rules of the SEC, be considered to be participants in the solicitation of stockholders in connection with the proposed Merger, including any interest they have in the proposed Merger, by reading the Joint Proxy Statement/Prospectus filed with the SEC.

This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

SIGNATURES

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, thereunto duly authorized.