What Percentage of American Express Does Warren Buffett Own?

Berkshire Hathaway's (NYSE: BRK-A) (NYSE: BRK-B) portfolio contains dozens of stocks, most of which were selected by CEO Warren Buffett. While this makes for a long list of "Buffett stocks," many investors don't realize just how top-heavy Berkshire's portfolio is -- that is, how most of the portfolio's value is in just a handful of companies.

One of Berkshire's major holdings is American Express (NYSE: AXP), which has been a part of Berkshire's portfolio since Buffett invested in convertible preferred stock in the company in 1991. Here's a rundown of the numbers behind Berkshire's American Express investment, and why Warren Buffett likes the company so much.

Image Source: The Motley Fool.

Source: Fool.com