The Ganz Machinery Works Holding is a Hungarian holding company. Its products are related to rail transport, power generation, and water supply, among other industries.

Ábrahám Ganz was a Swiss-born iron manufacturer, machine and technical engineer, entrepreneur, father of Ganz Works. He was the founder and the manager of the company that he made the flagship of the Hungarian economy in the 19th century. Despite his early death in 1867 the company remained one of the strongest manufacturing enterprise in Austria-Hungary. Many famous engineers worked at Ganz Works inter alia Károly Zipernowsky, Ottó Bláthy, Miksa Déri, András Mechwart, Kálmán Kandó, Donát Bánki, János Csonka and Theodore von Kármán and several world-famous inventions were done there, like the first railway electric traction, or the invention of the roller mill, the carburetor, the transformer and the Bánki-Csonka engine.