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): June 19, 2015

STAPLES, INC.

(Exact name of registrant as specified in charter)

Registrant’s telephone number, including area code: 508-253-5000

(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 June 19, 2015, Staples, Inc. (“Staples”) issued a statement regarding the approval of its proposed acquisition of Office Depot, Inc. (“Office Depot”) by the stockholders of Office Depot. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

IMPORTANT ADDITIONAL INFORMATION

In connection with the proposed merger, Staples has filed with the Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 that includes a proxy statement of Office Depot that also constitutes a prospectus of Staples.  Staples filed the final proxy statement/prospectus with the SEC on May 18, 2015.  The registration statement was declared effective by the SEC on May 15, 2015.  Office Depot mailed the definitive proxy statement/prospectus to stockholders of Office Depot on or about May 19, 2015.  The registration statement and the proxy statement/prospectus contain important information about Staples, Office Depot, the transaction and related matters.  Investors and security holders are urged to read the registration statement and the proxy statement/prospectus (including all amendments and supplements thereto) carefully.

Investors and security holders may obtain free copies of the registration statement and the proxy statement/prospectus and other documents filed with the SEC by Staples and Office Depot through the web site maintained by the SEC at www.sec.gov.

In addition, investors and security holders may obtain free copies of the registration statement and the definitive proxy statement/prospectus from Staples by contacting Staples’ Investor Relations Department at 800-468-7751 or from Office Depot by contacting Office Depot’s Investor Relations Department at 561-438-7878.

SAFE HARBOR FOR FORWARD-LOOKING STATEMENTS

Statements in this report regarding the proposed transaction between Staples and Office Depot, the expected timetable for completing the transaction, future financial and operating results, benefits and synergies of the transaction, future opportunities for the combined company and any other statements about Staples or Office Depot managements’ future expectations, beliefs, goals, plans or prospects constitute forward looking statements within the meaning of the Private Securities Litigation Reform Act of 1995.  Any statements that are not statements of historical fact (including statements containing “believes,” “anticipates,” “plans,” “expects,” “may,” “will,” “would,” “intends,” “estimates” and similar expressions) should also be considered to be forward looking statements.  There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward looking statements, including:  the ability to consummate the transaction; the risk that Office Depot’s stockholders do not approve the merger; the risk that regulatory approvals required for the merger are not obtained or are obtained subject to conditions that are not anticipated; the risk that the financing required to fund the transaction is not obtained; the risk that the other conditions to the closing of the merger are not satisfied; potential adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the merger; uncertainties as to the timing of the merger; competitive responses to the proposed merger; response by activist shareholders to the merger; uncertainty of the expected financial performance of the combined company following completion of the proposed transaction; the ability to successfully integrate Staples’ and Office Depot’s operations and employees; the ability to realize anticipated synergies and cost savings; unexpected costs, charges or expenses resulting from the merger; litigation relating to the merger; the outcome of pending or potential litigation or governmental investigations; the inability to retain key personnel; any changes in general economic and/or industry specific conditions; and the other factors described in Staples’ Annual Report on Form 10-K for the year ended January 31, 2015 and Office Depot’s Annual Report on Form 10-K for the year ended December 27, 2014 and their most recent Quarterly Reports on Form 10-Q each filed with the SEC.  Staples and Office Depot disclaim any intention or obligation to update any forward looking statements as a result of developments occurring after the date of this report.

Item 9.01                                           Financial Statements and Exhibits

The exhibits listed on the Exhibit Index immediately preceding such exhibits are filed as part of this Current Report on Form 8-K.

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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.

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EXHIBIT INDEX

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Exhibit 99.1

Staples, Inc.  Issues Response to Office Depot Shareholders’ Approval of Acquisition by Staples

FRAMINGHAM, Mass., June 19, 2015 — Staples, Inc. (Nasdaq: SPLS) today issued a statement in response to the vote by Office Depot shareholders approving the acquisition by Staples.

“We’re pleased that Office Depot shareholders have overwhelmingly approved this transaction,” said Ron Sargent, Chairman and Chief Executive Officer, Staples. “The combined company will allow us to provide more value to customers and more effectively compete in a rapidly evolving environment.”

Staples recently received clearance for the transaction from regulatory agencies in New Zealand and China. The company is working closely with regulatory agencies to seek outstanding antitrust clearances and expects the transaction to be completed by the end of the year.

IMPORTANT ADDITIONAL INFORMATION

In connection with the proposed merger, Staples has filed with the Security and Exchange Comission a registration statement on Form S-4 that includes a proxy statement of Office Depot that also constitutes a prospectus of Staples.  Staples filed the final proxy statement/prospectus with the SEC on May 18, 2015.  The registration statement was declared effective by the SEC on May 15, 2015.  Office Depot, Inc. mailed the definitive proxy statement/prospectus to stockholders of Office Depot, Inc. on or about May 19, 2015.  The registration statement and the proxy statement/prospectus contain important information about Staples, Office Depot, the transaction and

related matters.  Investors and security holders are urged to read the registration statement and the proxy statement/prospectus (including all amendments and supplements thereto) carefully.

Investors and security holders may obtain free copies of the registration statement and the proxy statement/prospectus and other documents filed with the SEC by Staples and Office Depot through the web site maintained by the SEC at www.sec.gov.

In addition, investors and security holders may obtain free copies of the registration statement and the definitive proxy statement/prospectus from Staples by contacting Staples’ Investor Relations Department at 800-468-7751 or from Office Depot by contacting Office Depot’s Investor Relations Department at 561-438-7878.

SAFE HARBOR FOR FORWARD-LOOKING STATEMENTS

Statements in this document regarding the proposed transaction between Staples and Office Depot, the expected timetable for completing the transaction, future financial and operating results, benefits and synergies of the transaction, future opportunities for the combined company and any other statements about Staples or Office Depot managements’ future expectations, beliefs, goals, plans or prospects constitute forward looking statements within the meaning of the Private Securities Litigation Reform Act of 1995.  Any statements that are not statements of historical fact (including statements containing “believes,” “anticipates,” “plans,” “expects,” “may,” “will,” “would,” “intends,” “estimates” and similar expressions) should also be considered to be forward looking statements.  There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward looking statements, including:  the ability to consummate the transaction; the risk that Office Depot’s stockholders do not approve the merger; the risk that regulatory approvals required for the merger are not obtained or are obtained subject to conditions that are not anticipated; the risk that the financing required to fund the transaction is not obtained; the risk that the other conditions to the closing of the merger are not satisfied; potential adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the merger; uncertainties as to the timing of the merger; competitive responses to the proposed merger; response by activist shareholders to the merger; uncertainty of the expected financial performance of the combined company following completion of the proposed transaction; the ability to successfully integrate Staples’ and Office Depot’s

operations and employees; the ability to realize anticipated synergies and cost savings; unexpected costs, charges or expenses resulting from the merger; litigation relating to the merger; the outcome of pending or potential litigation or governmental investigations; the inability to retain key personnel; any changes in general economic and/or industry specific conditions; and the other factors described in Staples’ Annual Report on Form 10-K for the year ended January 31, 2015 and Office Depot’s Annual Report on Form 10-K for the year ended December 27, 2014 and their most recent Quarterly Reports on Form 10-Q each filed with the SEC.  Staples and Office Depot disclaim any intention or obligation to update any forward looking statements as a result of developments occurring after the date of this document.

About Staples

Staples makes it easy to make more happen with more products and more ways to shop. Through its world-class retail, online and delivery capabilities, Staples lets customers shop however and whenever they want, whether it’s in-store, online or on mobile devices. Staples offers more products than ever, such as technology, facilities and break room supplies, furniture, safety supplies, medical supplies, and Copy and Print services. Staples also offers free shipping for Staples Rewards Members, in most cases overnight. Headquartered outside of Boston, Staples operates in North and South America, Europe, Asia, Australia and New Zealand. More information about Staples (SPLS) is available at www.staples.com.