The latest weekly sales reports at two of the nation's top retailers showed sales in shops open at least one year lagged company plans in early February.

Same-store sales for the first week of

Wal-Mart's

(WMT) - Get Report

February sales period came in slightly below plans for an increase of 3% to 5%. Bentonville, Ark.-based Wal-Mart, the country's largest retailer, said sales were strongest in the West and mid-Atlantic states. Shares were up $1.85, or 3.7%, at $52.25.

Meanwhile, same-store sales at

J.C. Penney

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(JCP) - Get Report

also came up short of the company's plans. At its department store division, sales were below plans for a low-single-digit percentage decline. The Plano, Tex.-based company said its top categories were women's apparel, family shoes and home furnishings. Catalog sales were on plan for a high-single-digit decrease, while drugstore sales were also on plan for a high-single-digit percentage gain. In recent trading, shares were up 36 cents at $14.32.

At

Kmart

(KM)

, sales were on plan for a 1% to 3% increase in February. Shares were up 21 cents at $8.63.

These are the only large-scale retailers that report weekly same-store sales. The bulk of the nation's retailers reported

monthly sales for January on Feb. 2.