Ross Stores Inc. reported sales results for the five weeks and eleven months ended December 29, 2012. For the period, the company's sales increased 14% to $1.149 billion from $1.008 billion for the five weeks ended January 1, 2011. Same store sales for the month rose 9% on top of 4% and 12% gains in the prior two years.

For the eleven months, the company's sales totaled $8.125 billion, up 9% over the $7.425 billion in sales for the eleven months ended January 1, 2011. Comparable store sales for the eleven months ended December 31, 2011 grew 5% on top of 5% and 6% increases for 2010 and 2009, respectively.

Based on better-than-expected sales and margin trends quarter-to-date and the company's continued assumption for a 1% to 2% increase in January same store sales.

The company revised earnings guidance for the fourteen weeks ending February 2, 2012. The company now projected earnings per share for the fourteen weeks ending February 2, 2013 to be $1.05 to $1.06, compared to previous guidance of $0.99 to $1.04.