In the decades after 1945, Philipp Brothers grew to become the largest and most important metal trading company in the world. By the late 1970s, the company had become an international giant, dealing in over one hundred and fifty different industrial raw materials with representatives in virtually every country in the world possessing metals or minerals of commercial quality. During most of this period, Ludwig Jesselson, who had come to New York in 1937 to work for Philipp Brothers, was at the helm of the company. Jesselson led the company from a sizable private company to an international giant, in the process contributing to changing the markets for international commodities.