Berkshire Hathaway Inc.

Berkshire Hathaway is the holding company where Warren Buffett, one of the world's richest men, makes his money and spreads his risk.

The company invests in a variety of industries. The most important of these are insurance businesses conducted on both a primary basis and a reinsurance basis, a freight rail transportation business and a group of utility and energy generation and distribution businesses. Its core insurance subsidiaries include GEICO, National Indemnity, and reinsurance giant General Re.

The company currently owns a 92% ownership interest in Berkshire Hathaway Energy Company (BHE), a global energy company with subsidiaries and affiliates that generate, transmit, store, distribute, and supply energy. BHE's domestic regulated utility interests include PacifiCorp, MidAmerican Energy Company (MEC), and NV Energy.