 Deutsche Treuhandgesellschaft CEO Reinhard Goerdeler (son of leading anti-Nazi activist Carl Goerdeler, who would have become Chancellor if Operation Valkyrie had succeeded) became the first CEO of KMG.In the United States, Main Lafrentz & Co. merged with Hurdman and Cranstoun to form Main Hurdman & Cranstoun.<ref></ref>

In 1987, KMG and Peat Marwick joined forces in the first mega-merger of large accounting firms and formed a firm called KPMG in the United States, and most of the rest of the world, and Peat Marwick McLintock in the United Kingdom.In the Netherlands, as a consequence of the merger between PMI and KMG in 1988, PMI tax advisors joined Meijburg & Co. (The tax advisory agency Meijburg & Co. was founded by Willem Meijburg, Inspector of National Taxes, in 1939).