1 in 4 U.S. Companies Headquartered – Nearly 1 in 4 U.S. public companies are headquartered here — home to 126 Fortune 500 companies. – Nearly 1 in 4 U.S. public companies are headquartered here — home to 126 Fortune 500 companies. If the Boom Belt truly is the new center of gravity for American capitalism, then the infrastructure of public markets must follow.” The establishment of the Texas Stock Exchange makes sense with more capital moving into Texas and the South. With the launch of TXSE, alongside Nasdaq Texas and NYSE Texas, the Lone Star State is no longer just attracting companies.