425

Filed by Office Depot, Inc.

Commission File No. 1-10948

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: OfficeMax Incorporated

Commission File No. 1-05057

Date: February 20, 2013

MERGER

Vendor Call Script – Non-Trade

I am happy to share with you some very exciting news.

Office Depot and OfficeMax have agreed to a merger of equals – with the goal of creating a stronger, more efficient global provider of office products, services, and solutions.

We believe that this proposed merger will greatly benefit you and our other vendors by putting us in a better position to expand our use of your products and services as we introduce a more competitive enterprise to the marketplace.

While the transaction is pending, Office Depot and OfficeMax will continue to operate as separate companies and compete against each other. We are committed to making sure that you do not experience any disruption in the way you do business with us during that time.

We currently expect the transaction to close by the end of 2013. Of course, that depends on a series of approvals that need to take place first, including approval by the Federal Trade Commission (FTC).

FOR MAJOR VENDORS:

It is not unusual for the FTC, as part of their examination, to contact vendors, and solicit their views about the transaction. If you do hear from the FTC, we would appreciate it if you would let us know. It will inform us that the process is moving along expeditiously.

IF the vendor asks how you would like them to respond to any questions asked by the FTC, answer that they are completely free to respond in any way they feel appropriate and that you are merely letting them know that the FTC might contact them.

IF vendors express anger about the fact that they need to respond to the FTC’s questions, stress that they are among your most important vendors and that Office Depot is under a legal obligation to provide their contact details to the FTC.

You have been an excellent and reliable partner in the past, and we hope to continue to work with you in the future.

If you have any questions, please feel free to contact me. The press release announcing the transaction can be found at www.officedepot.com.

Thank you for your continued support. We greatly value our partnership.


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 31, 2011 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.