Berkshire is essentially two monster businesses rolled into one -- an insurance conglomerate, anchored by sturdy sector mainstay Geico, and a collection of investments. The latter can be broken down into businesses fully owned by Berkshire (such as confectioner See's Candies) and a bulging portfolio of stakes in publicly traded companies. The stock portfolio includes many well-known titles across a range of sectors. Nearly every investor will be familiar with such names as Apple, American Express, and Coca- ...