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): February 4, 2011

SMURFIT-STONE CONTAINER CORPORATION

(Exact Name of Registrant as Specified in its Charter)

222 N. LaSalle Street

Chicago, Illinois 60601

(Address of Principal Executive Offices, including Zip code)

(312) 346-6600

(Registrant’s telephone number, including area code)

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 February 7, 2011, Smurfit-Stone Container Corporation, a Delaware corporation (the “Smurfit-Stone”) and Rock-Tenn Company, a Georgia corporation (“RockTenn”) issued a joint press release announcing that the Federal Trade Commission has granted early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 in connection with the previously announced acquisition by RockTenn in which Smurfit-Stone will be merged with and into a wholly-owned subsidiary of RockTenn.  A copy of such press release is attached hereto as Exhibit 99.1.

Cautionary Statement Regarding Forward-Looking Information

This document contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are typically identified by words or phrases such as “may,” “will,” “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “target,” “forecast,” and other words and terms of similar meaning. Forward-looking statements involve estimates, expectations, projections, goals, forecasts, assumptions, risks and uncertainties.  Smurfit-Stone cautions readers that any forward-looking statement is not a guarantee of future performance and that actual results could differ materially from those contained in the forward-looking statement. Such forward-looking statements include, but are not limited to, statements regarding the anticipated closing date of the transaction, the successful closing of the transaction and the integration of Smurfit-Stone as well as opportunities for operational improvement including but not limited to cost reduction and capital investment, the strategic opportunity and perceived value to RockTenn and Smurfit-Stone’s shareholders of the transaction, the opportunity to recognize benefits from Smurfit-Stone’s NOLs, the transaction’s impact on, among other things, RockTenn’s business mix, margins, transitional costs and integration to achieve the synergies and the timing of such costs and synergies and earnings. With respect to these statements, Smurfit-Stone has made assumptions regarding, among other things, whether and when the proposed transaction will be approved; whether and when the proposed transaction will close; the availability of financing on satisfactory terms; the amount of debt RockTenn will assume; the results and impacts of the acquisition; preliminary purchase price allocations which may include material adjustments to the preliminary fair values of the acquired assets and liabilities; economic, competitive and market conditions generally; volumes and price levels of purchases by customers; competitive conditions in RockTenn and Smurfit-Stone’s businesses and possible adverse actions of our respective customers, competitors and suppliers. Further, RockTenn and Smurfit-Stone’s businesses are subject to a number of general risks that would affect any such forward-looking statements including, among others, decreases in demand for their products; increases in energy, raw materials, shipping and capital equipment costs; reduced supply of raw materials; fluctuations in selling prices and volumes; intense competition; the potential loss of certain customers; and adverse changes in general market and industry conditions. Such risks and other factors that may impact management’s assumptions are more particularly described in RockTenn and Smurfit-Stone’s filings with the Securities and Exchange Commission, including under the caption “Business — Forward-Looking Information” and “Risk Factors” in RockTenn’s Annual Report on Form 10-K for the most recently ended fiscal year and “Business — Risk Factors” and “Forward-Looking Information” in Smurfit-Stone’s Annual Report on Form 10-K for the most recently ended fiscal year. The information contained herein speaks as of the date hereof and Smurfit-Stone does not have or undertake any obligation to update or revise its forward-looking statements, whether as a result of new information, future events or otherwise.

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Additional Information and Where to Find It

In connection with the proposed transaction, RockTenn and Smurfit-Stone will be filing documents with the Securities and Exchange Commission (the “SEC”), including the filing by RockTenn of a registration statement on Form S-4 that will include a joint proxy statement of RockTenn and Smurfit-Stone that also constitutes a prospectus of RockTenn.  RockTenn and Smurfit-Stone stockholders are urged to read the registration statement on Form S-4 and the related joint proxy statement/prospectus when they become available, as well as other documents filed with the SEC, because they will contain important information.  The final joint proxy statement/prospectus will be mailed to stockholders of RockTenn and stockholders of Smurfit-Stone.  Investors and security holders may obtain free copies of these documents (when they are available) and other documents filed with the SEC at the SEC’s web site at www.sec.gov, or by contacting RockTenn Investor Relations at (678) 291-7900 or Smurfit-Stone Investor Relations at (314) 656-5553.

Participants in the Merger Solicitation

RockTenn, Smurfit-Stone and their respective directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the transaction.  Information concerning RockTenn’s executive officers and directors is set forth in its definitive proxy statement filed with the SEC on December 17, 2010.  Information concerning Smurfit-Stone’s executive officers and directors is set forth in its annual report on Form 10-K for the year ended December 31, 2009, which was filed with the SEC on  March 2, 2010, and in its current report on Form 8-K filed on July 7, 2010.  Additional information regarding the interests of participants of RockTenn and Smurfit-Stone in the solicitation of proxies in respect of the transaction will be included in the above-referenced registration statement on Form S-4 and joint proxy statement/prospectus when it becomes available.  You can obtain free copies of these documents from RockTenn and Smurfit-Stone using the contact information above.

ITEM 9.01.            FINANCIAL STATEMENTS AND EXHIBITS

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SIGNATURE

Pursuant to the requirements of the Securities and 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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