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): November 7, 2016

Home BancShares, Inc.

(Exact name of registrant as specified in its charter)

Arkansas

(State or other jurisdiction of incorporation)

(501) 339-2929

(Registrant’s telephone number, including area code)

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 (see General Instruction A.2. below):

On November 7, 2016, Home BancShares, Inc., an Arkansas corporation (“Home”) issued a press release announcing the signing of a definitive agreement (the “Definitive Agreement”) under which Home will acquire Giant Holdings, Inc. (“GHI”) and its bank subsidiary, Landmark Bank, N.A., headquartered in Fort Lauderdale, Florida (the “Acquisition”). Copies of the press release announcing the transaction and certain additional information regarding the Acquisition are attached as Exhibits 99.1 and 99.2 to this Current Report.

The information set forth in Item 7.01 and Exhibits 99.1 and 99.2 is incorporated herein by reference.

Additional Information about the Acquisition and Where to Find It

In connection with the Acquisition, Home intends to file with the Securities and Exchange Commission (the “SEC”) a Registration Statement on Form S-4 (the “Registration Statement”) to register the shares of Home common stock to be issued to shareholders of GHI in connection with the transaction. The Registration Statement will include a Proxy Statement of GHI and a Prospectus of Home, as well as other relevant materials regarding the proposed merger transaction involving Home and GHI. INVESTORS AND SECURITY HOLDERS OF GHI ARE ADVISED TO READ THE PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE MERGER OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT/PROSPECTUS BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION REGARDING THE PROPOSED MERGER TRANSACTION. Investors and security holders may obtain free copies of these documents, once they are filed, and other documents filed with the SEC on the SEC’s website at http://www.sec.gov. Investors and security holders may also obtain free copies of the documents filed with the SEC by Home at Home’s website at http://www.homebancshares.com, Investor Relations, or by contacting Jennifer Floyd, by telephone at (501) 339-2929.

Cautionary Note Regarding Forward-Looking Statements

This Current Report may contain forward-looking statements which include, but are not limited to, statements about the benefits of the business combination transaction involving Home and GHI, including the combined company’s future financial and operating results, plans, objectives, expectations, goals and outlook for the future. Statements in this Current Report that are not historical facts should be considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements of this type speak only as of the date of this news release. By nature, forward-looking statements involve inherent risk and uncertainties. Various factors could cause actual results to differ materially from those contemplated by the forward-looking statements, including, but not limited to, (i) the possibility that the acquisition does not close when expected or at all because required regulatory, shareholder or other approvals and other conditions to closing are not received or satisfied on a timely basis or at all; (ii) changes in Home’s stock price before closing, (iii) the risk that the benefits from the transaction may not be fully realized or may take longer to realize than expected, including as a result of changes in general economic and market conditions, interest and exchange rates, monetary policy, laws and regulations and their enforcement, and the degree of

competition in the geographic and business areas in which Home and GHI operate; (iv) the ability to promptly and effectively integrate the businesses of Home and GHI; (v) the reaction to the transaction of the companies’ customers, employees and counterparties; and (vi) diversion of management time on acquisition-related issues. Additional information on factors that might affect Home’s financial results is included in its Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC on February 26, 2016 and its Quarterly Report on Form 10-Q for the period ended September 30, 2016, filed with the SEC on November 4, 2016.

(d) Exhibits

99.1 Press Release: Home BancShares, Inc. and Giant Holdings, Inc. Announce Signing of Definitive Agreement.

99.2 Supplemental materials to Press Release dated November 7, 2016.

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.