UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): March 18, 2016

Starwood Hotels & Resorts Worldwide, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (203) 964-6000

Not Applicable

(Former name or former address, if changed since last report)

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:

x   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events.

On March 18, 2016, Starwood Hotels & Resorts Worldwide, Inc. (“Starwood”) issued a press release announcing details relating to the timing of the spin-off and subsequent merger of its vacation ownership business, Vistana Signature Experiences, Inc. (“Vistana”). A copy of the press release is attached hereto as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

(d)     Exhibits

Exhibit 99.1        Press Release of Starwood Hotels & Resorts Worldwide, Inc., dated March 18, 2016

Forward-Looking Statements

This communication contains forward-looking statements within the meaning of federal securities regulations. Forward-looking statements are not guarantees of future performance and involve risks and uncertainties and other factors that may cause actual results to differ materially from those anticipated at the time the forward-looking statements are made. Further results, performance and achievements may be affected by general economic conditions including the impact of war and terrorist activity, natural disasters, business and financing conditions (including the condition of credit markets in the U.S. and internationally), foreign exchange fluctuations, cyclicality of the real estate (including residential) and the hotel and vacation ownership businesses, operating risks associated with the hotel, vacation ownership and residential businesses, relationships with associates and labor unions, customers and property owners, the impact of the internet reservation channels, our reliance on technology, domestic and international political and geopolitical conditions, competition, governmental and regulatory actions (including the impact of changes in U.S. and foreign tax laws and their interpretation), travelers’ fears of exposure to contagious diseases, risk associated with the level of our indebtedness, risk associated with potential acquisitions and dispositions and the introduction of new brand concepts and other risks and uncertainties. These risks and uncertainties are presented in detail in our or Vistana’s filings with the Securities and Exchange Commission (“SEC”). There can be no assurance as to the development of future hotels in the Company’s pipeline or additional vacation ownership units, estimated sales growth or that Vistana will achieve the potential growth scenarios described in this presentation. Although we believe the expectations reflected in forward-looking statements are based upon reasonable assumptions, we can give no assurance that our expectations will be attained or that results will not materially differ. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Additional Information and Where to Find It

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. This communication may be deemed to be solicitation material in respect of the proposed merger between a wholly-owned subsidiary of Interval Leisure Group, Inc. and Vistana. In connection with the proposed merger, ILG has filed a registration statement on Form S-4, containing a proxy statement/prospectus with the SEC and Vistana has filed a registration statement on Form 10 with the SEC. STOCKHOLDERS OF STARWOOD AND ILG ARE URGED TO READ ALL RELEVANT DOCUMENTS FILED WITH THE SEC, INCLUDING THE PROXY STATEMENT/PROSPECTUS AND THE FORM 10, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED MERGER. Investors and security holders will be able to obtain copies of the proxy statement/prospectus and the Form 10 as well as other filings containing information about ILG, Starwood and Vistana, without charge, at the SEC’s website, http://www.sec.gov. Copies of documents filed with the SEC by ILG will be made available free of charge on ILG’s investor relations website. Copies of documents filed with the SEC by Starwood will be made available free of charge on Starwood’s investor relations website.

Participants in Solicitation

Starwood and its directors and executive officers, and ILG and its directors and executive officers, may be deemed to be participants in the solicitation of proxies from the holders of ILG common stock in respect of ILG’s stock

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issuance in connection with the proposed merger. Information about the directors and executive officers of Starwood is set forth in the proxy statement for Starwood’s 2015 Annual Meeting of Stockholders, which was filed with the SEC on April 17, 2015. Information about the directors and executive officers of ILG is set forth in ILG’s Form 10-K/A, which was filed with the SEC on March 9, 2016. Investors may obtain additional information regarding the interest of such participants by reading the proxy statement/prospectus regarding the proposed merger when it becomes available.

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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 hereunto duly authorized.

Date: March 18, 2016

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EXHIBIT INDEX

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