RockTenn today reported earnings for the quarter ended September 30, 2011 of $1.17 per diluted share and adjusted earnings of $1.70 per diluted share.

Net sales of $2,463.5 million for the fourth quarter of fiscal 2011 increased $1,656.7 million over the fourth quarter of fiscal 2010, primarily as a result of the full quarter impact of the May 27, 2011, Smurfit-Stone acquisition.

Segment income, adjusted to eliminate $4.0 million of pre-tax acquisition inventory step-up was $241.0 million, up 81.9% over the prior year quarter, primarily as a result of the Smurfit-Stone acquisition.

RockTenn's restructuring and other costs and operating losses and transition costs due to plant closures, net of related noncontrolling interest were $0.35 per diluted share after-tax, for the fourth quarter of fiscal 2011. These costs consisted primarily of $18.0 million of pre-tax facility closure charges primarily related to former Smurfit-Stone corrugated container plants, $8.7 million of pre-tax integration costs that primarily consisted of severance and other employee costs and professional services, $4.0 million of pre-tax acquisition costs, $3.3 million pre-tax operating losses and transition costs in connection with consolidating converting facilities and a charge of $3.3 million for tax adjustments related primarily to non-deductible acquisition costs.