In 1991, the company expanded into Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, and New York. In 1990, US sales had quadrupled to $32 billion over the previous five years and Walmart acquired The McLane Company, a food service distributor, which was later sold to Berkshire Hathaway in 2003. The 1990s saw an era of furious growth on an unprecedented scale and the incorporation of several new ideas and technology into the business. The Walmart Visitor's Center also opened this year on the site of Sam Walton's original store. By 1990, they expanded into California (which marked Walmart officially becoming a fully nationwide retailer), Nevada, North Dakota, Pennsylvania, South Dakota, and Utah. The supercenter concept features everything contained in an average Walmart discount store, in addition to a tire and oil change shop, optical center, one-hour photo processing lab, portrait studio, and numerous alcove shops such as banks, cellular telephone stores, hair and nail salons, video rental stores, and fast food outlets.Д«y 1988, Wal-Mart was the most profitable retailer in the United States, though it did not outsell K-Mart and Sears in terms of value of items purchased until late 1990 or early 1991.Д«y 1988, Walmart was operating in 27 states, having expanded into Arizona, Michigan, Ohio, West Virginia, New Jersey, and Wyoming. Walton remained on as Chairman of the Corporate Board of Directors, and the company also restructured their senior management positions, elevating a cadre of executives to positions of greater responsibility.ДЄlso in 1988, the first Wal-Mart Supercenter was opened in Washington, Missouri. In February 1988, company founder Sam Walton stepped down as chief executive officer, and David Glass was named to succeed him. Continuing their technological upgrades, they had equipped 90% of their stores with barcode readers by 1988, to further assist in keeping track of their large inventory. In 1985, with 882 stores with sales of $8.4 billion and 104,000 associates, the company expanded into Wisconsin and Colorado, and the first stores opened in Minnesota in 1986.Д«y the company's 25th anniversary in 1987, there were offices to track inventory, sales, and send instant communication to their stores. The first stores opened in Virginia in 1984. They also expanded into Indiana, Iowa, New Mexico, and North Carolina and implemented 'people greeters' in all of their stores. In April 1983, the company opened its first Sam's Club store, a membership-based discount warehouse club, in Midwest City, Oklahoma. They expanded into Florida and Nebraska in 1982. In 1981, Walmart expanded into the southeastern US market, opening stores in Georgia and South Carolina, and acquiring 92 Kuhn's Big K stores. In the same year Walmart also branched out into several new markets, launching its pharmacy, auto service center, and jewelry divisions.

This was followed by the acquisition of the Hutcheson Shoe Company in 1978.

As the company expanded into Texas in 1975, there were 125 stores with 7,500 associates, and total sales of $340.3 million.Д«y 1977, Walmart expanded into Illinois and made its first corporate acquisition, assuming ownership and operation of the Mohr-Value stores, which operated in Missouri and Illinois. By this time, Walmart was operating in five states: Arkansas, Kansas, Louisiana, Missouri and Oklahoma, and expanded into Tennessee in 1973, and Kentucky and Mississippi in 1974. The company's first stock split occurred in May 1972 at a market price of $47. By 1967, the company grew to 24 stores across the state of Arkansas, and had reached $12.6 million in sales, and by 1968, the company opened its first stores outside of Arkansas in Sikeston, Missouri, and Claremore, Oklahoma. Responsible for the purchase and maintenance of signage, Walton's assistant, Bob Bogle, came up with the name 'Wal-Mart' for the new chain. Inspired by the successes of other discount department store chains, Walton opened the second store in Harrison, Arkansas, that year. At some point, Sam Walton made the decision to achieve higher sales volumes by keeping sales prices lower than his competitors by reducing his profit margin.

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