Wal-Mart Stores, Inc. reported net sales for the four-week period ending June 1, 2001, of $16.440 billion, an increase of 12.5 percent over the $14.610 billion in the similar period in the prior year. Sales for the 17-week period were $66.259 billion, an increase of 12.3 percent over the $58.990 billion in the similar period in the prior year.