Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis.
| Industry | Fire, Marine & Casualty Insurance |
| Employees | 387,800 |
| Headquarters | OMAHA, NE |
| Incorporated in | DE |
| Listed on | NYSE, NYSE |
| Listed since | May 9, 1996 |
| Fiscal year ends | December 31 |
| SEC filer category | Large accelerated filer |
| Website | berkshirehathaway.com |
| SEC company number (CIK) | 1067983 |
Company description from Polygon.io. Industry, address and filing details from SEC EDGAR.