A list of New Jersey companies. Many well known New Jersey companies have been included. While this list isn't definitive, these are most of the top businesses in the state of New Jersey. As a country, the United States has encouraged entrepreneurship throughout much of its history. The state of New Jersey is no exception to this rule, and new businesses are started in New Jersey daily, ranging from corporations to LLCs to partnerships to sole proprietorships. This list, however, is mostly focused on the largest corporations in the state of New Jersey.What companies are based in New Jersey? This list will give you that definitive answer. There are some familiar corporations located in the Garden State, so take a look and you'll see for yourself.