The A.M. Best Company, Inc., is headquartered just outside of New York, in New Jersey. This is one of the top rating firms in the United States and is known as being the best Statistical Rating Organization (NRSRO) in the world.
They were founded by Alfred M. Best just before the turn of the century in New York City. For the longest time it was a privately held and in 1965 moved to New Jersey. (Probably for cheaper real estate). A.M. offers a variety of office locations throughout the U.S. and world, with locations from London to D.C.
Their specialty is to rank financial-strength ratings measuring insurance companies' ability to be charged for claims. Also, they rate financial products offered by insurance company’s including notes and bonds. Learn more about A.M. Best here.