Charlotte is the largest city in North Carolina and also the county seat of Mecklenburg County. Charlotte is the third fastest growing major city in the United States. Charlotte is also home to the corporate headquarters of Bank of America and the east coast operations of Wells Fargo, which among other financial operations makes it the second largest banking center in the United States. Charlotte is home to the Carolina Panthers of the NFL and the Carolina Hornets of the NBA. Charlotte is also the major center in the U.S. motorsports industry, housing multiple offices of NASCAR, the NASCAR Hall of Fame and Charlotte Motor Speedway in Concord. In the region there are more than 240 companies directly tied to energy sector collectively employing more than 26,400.