A trucking company is simply a company that ships goods or possessions by truck. Note that the trucking industry is a cyclical sector made up of companies that offer shipping services, using tractor-trailers. Most trucking companies own and operate the vehicles in their fleets, while some rely on leasing.
However, the vast majority of revenue is generated domestically, since overseas shipments require either air- or sea-based transportation. These companies have little exposure to foreign currency fluctuations and the industry tends to be a primary indicator for the overall economy.