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: March 4, 2013

Commission file number 1-10948

OFFICE DEPOT, INC.

(Exact name of registrant as specified in its charter)

(561) 438-4800

(Registrant’s telephone number, including area code)

Former name or former address, if changed since last report: N/A

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 March 4, 2013, Office Depot, Inc. (the “Company”), together with certain of its European subsidiaries, as borrowers (the “European Borrowers”), entered into a Second Amendment (the “Amendment”) to the Amended and Restated Credit Agreement (the “Amended Credit Agreement”) dated as of May 25, 2011 with the lenders party thereto, JPMorgan Chase Bank, N.A., London Branch, as European Administrative Agent and European Collateral Agent, JPMorgan Chase Bank, N.A., as Administrative Agent and US Collateral Agent, Bank of America, N.A., as Syndication Agent and Citibank, N.A. and Wells Fargo Bank, N.A., as Documentation Agents.

The Amendment amends the Amended Credit Agreement to provide the Company the ability to make payments to holders of the Company’s preferred stock (the “Preferred Stockholders”) to redeem all of the Company’s preferred stock and to repurchase certain amounts of common stock held by the Preferred Stockholders, in each case as required pursuant to the merger transaction contemplated by the Company’s Agreement and Plan of Merger with OfficeMax Incorporated and documents related thereto.

The foregoing description of the Amendment, which describes the primary changes to the Amended Credit Agreement, does not purport to be complete and is subject to and qualified in its entirety by reference to the full text of the Amendment, a copy of which is filed as Exhibit 10.1 hereto.

The information contained above in Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference and made a part hereof.

NO OFFER OR SOLICITATION

This communication is not intended to and does not constitute an offer to sell or the solicitation of an offer to subscribe for or buy or an invitation to purchase or subscribe for any securities or the solicitation of any vote or approval in any jurisdiction in connection with the transaction or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. No offer 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.

IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

Office Depot, Inc. (“Office Depot”) will file with the SEC a registration statement on Form S-4 that will include the Joint Proxy Statement of Office Depot and OfficeMax Incorporated (“OfficeMax”) that also constitutes a prospectus of Office Depot. Office Depot and OfficeMax plan to mail the Joint Proxy Statement/Prospectus to their respective shareholders in connection with the transaction. INVESTORS AND SHAREHOLDERS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS FILED OR TO BE FILED WITH THE SEC CAREFULLY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT OFFICE DEPOT, OFFICEMAX, THE TRANSACTION AND RELATED MATTERS. Investors and shareholders will be able to obtain free copies of the Joint Proxy Statement/Prospectus and other documents filed with the SEC by Office Depot and OfficeMax through the website maintained by the SEC at www.sec.gov. In addition, investors and shareholders will be able to obtain free copies of the Joint Proxy Statement/Prospectus and other documents filed by Office Depot with the SEC by contacting Office Depot Investor Relations at 6600 North Military Trail, Boca Raton, FL 33496 or by calling 561-438-3657, and will be able to obtain free copies of the Joint Proxy Statement/Prospectus and other documents filed by OfficeMax by contacting OfficeMax Investor Relations at 263 Shuman Blvd., Naperville, Illinois 60563 or by calling 630-864-6800.

PARTICIPANTS IN THE SOLICITATION

Office Depot and OfficeMax and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the respective shareholders of Office Depot and OfficeMax in respect of the transaction described the Joint Proxy Statement/Prospectus. Information regarding the persons who may, under the rules of the SEC, be deemed participants in the solicitation of the respective shareholders of Office Depot and OfficeMax in connection with the proposed transaction, including a description of their direct or indirect interests, by security holdings or otherwise, will be set forth in the Joint Proxy Statement/Prospectus when it is filed with the SEC. Information regarding Office Depot’s directors and executive officers is contained in Office Depot’s Annual Report on Form 10-K for the year ended December 29, 2012 and its Proxy Statement on Schedule 14A, dated March 15, 2012, which are filed with the SEC. Information regarding OfficeMax’s directors and executive officers is contained in OfficeMax’s Annual Report on Form 10-K for the year ended December 29, 2012 and its Proxy Statement on Schedule 14A, dated March 20, 2012, which are filed with the SEC.

OFFICE DEPOT SAFE HARBOR STATEMENT

This communication may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 concerning Office Depot, the merger and other transactions contemplated by the merger agreement, Office Depot’s long-term credit rating and its revenues and operating earnings. These statements or disclosures may discuss goals, intentions and expectations as to future trends, plans, events, results of operations or financial condition, or state other information relating to Office Depot, based on current beliefs of management as well as assumptions made by, and information currently available to, management. Forward-looking statements generally will be accompanied by words such as “anticipate,” “believe,” “plan,” “could,” “estimate,” “expect,” “forecast,” “guidance,” “intend,” “may,” “possible,” “potential,” “predict,” “project” or other similar words, phrases or expressions. These forward-looking statements are subject to various risks and uncertainties, many of which are outside of Office Depot’s control. Therefore, investors and shareholders should not place undue reliance on such statements. Factors that could cause actual results to differ materially from those in the forward-looking statements include adverse regulatory decisions; failure to satisfy other closing conditions with respect to the merger; the risks that the new businesses will not be integrated successfully or that Office Depot will not realize estimated cost savings and synergies; Office Depot’s ability to maintain its current long-term credit rating; unanticipated changes in the markets for its business segments; unanticipated downturns in business relationships with customers or their purchases from Office Depot; competitive pressures on Office Depot’s sales and pricing; increases in the cost of material, energy and other production costs, or unexpected costs that cannot be recouped in product pricing; the introduction of competing technologies; unexpected technical or marketing difficulties; unexpected claims, charges, litigation or dispute resolutions; new laws and governmental regulations. The foregoing list of factors is not exhaustive. Investors and shareholders should carefully consider the foregoing factors and the other risks and uncertainties that affect Office Depot’s business described in its Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other documents filed from time to time with the SEC. Office Depot does not assume any obligation to update these forward-looking statements.

Exhibit 10.1.    Form of Second Amendment dated as of March 4, 2013, to the Amended and Restated Credit Agreement dated as of May 25, 2011.

SIGNATURE

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.

Exhibit Index