The company was listed on the New York Stock Exchange in 1972. In the late 1980s and early 1990s, the company rose from a regional to a national giant. By 1988, Walmart was the most profitable retailer in the U.S. and by October 1989, it had become the largest in terms of revenue. Geographically limited to the South and lower Midwest up to the mid-1980s, by the early 1990s the company's presence spanned from coast to coast—Sam's Club opened in New Jersey in November 1989 and the first California outlet opened in Lancaster in July 1990. A Walmart in York, Pennsylvania opened in October 1990, bringing the main store to the Northeast.