Alleghany Corporation is an American investment holding company originally created by the railroad entrepreneurs Oris and Mantis Van Sweringen as a holding company for their railroad interests. It was incorporated in 1929 and reincorporated in Delaware in 1984. On March 21, 2022, Berkshire Hathaway made an $11.6 billion offer to acquire the company, which completed in October 2022. The company's residual railroad investments led to president and CEO John J. Burns serving on the board of Burlington Northern Santa Fe Corporation from 1995 to 2004.