UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No.  )

Filed by the Registrant   o

Filed by a Party other than the Registrant   x

Check the appropriate box:

o           Preliminary Proxy Statement

¨           Confidential, for Use of the Commission Only (as permitted by Rule14a-6(e)(2))

¨           Definitive Proxy Statement

x          Definitive Additional Materials

o           Soliciting Material Under Rule 14a-12

OFFICE DEPOT, INC.

(Name of Registrant as Specified in Its Charter)

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

STARBOARD VALUE AND OPPORTUNITY S LLC

STARBOARD VALUE LP

STARBOARD VALUE GP LLC

STARBOARD PRINCIPAL CO LP

STARBOARD PRINCIPAL CO GP LLC

JEFFREY C. SMITH

MARK R. MITCHELL

PETER A. FELD

T-S CAPITAL PARTNERS, LLC

ROBERT TELLES

CYNTHIA JAMISON

ROBERT NARDELLI

DAVID SIEGEL

JOSEPH VASSALLUZZO

(Name of Persons(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x          No fee required.

¨           Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1)           Title of each class of securities to which transaction applies:

(2)           Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

(4)           Proposed maximum aggregate value of transaction:

(5)           Total fee paid:

¨           Fee paid previously with preliminary materials:

¨           Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously.  Identify the previous filing by registration statement number, or the form or schedule and the date of its filing.

(1)           Amount previously paid:

(2)           Form, Schedule or Registration Statement No.:

(3)           Filing Party:

(4)           Date Filed:

Starboard Value LP, together with the other participants named herein (collectively, “Starboard”), has made a definitive filing with the Securities and Exchange Commission of a proxy statement and accompanying GOLD proxy card to be used to solicit votes for the election of its slate of four highly-qualified director nominees at the 2013 annual meeting of stockholders of Office Depot, Inc., a Delaware corporation (“Office Depot”).

On August 2, 2013, Starboard Value LP issued a White Paper Presentation entitled “Transforming Office Depot: A Plan for Renewal and Reinvigoration,” which is attached as Exhibit 1.  The White Paper Presentation outlines a detailed operational plan to significantly improve the operating performance and value of Office Depot.  Starboard developed the White Paper Presentation together with its director nominees and one of the world’s leading restructuring and turnaround firms.