“
Berkshire has evolved from the simple stock-picking days of the 1960s into a conglomerate with three major parts. First there are common stockholdings in companies like Coca-Cola, Gillette, and The Washington Post. Second, there are wholly owned or controlled companies such as Wesco Financial, World Book Encyclopedia, and Clayton Homes. The 2003 annual report lists some sixty-six of these, with 172,000 employees, orchestrated by Warren and Charlie from a corporate office that has “swollen” to sixteen employees. Third and perhaps most important is the insurance segment consisting mostly of GEICO and the reinsurance company General Re.
”
”
Edward O. Thorp (A Man for All Markets: From Las Vegas to Wall Street, How I Beat the Dealer and the Market)