Investors often prefer to invest in shares held by company insiders, as management is typically more aligned with the company’s success and shareholder interests. Currently, insiders own just 0.13% of American Express Company (AXP)’s shares, while financial institutions hold 86.88%.

American Express (NYSE: AXP) has long been a top holding in the Berkshire Hathaway portfolio. The great Warren Buffett knows a thing or two about analyzing financial services entities, so it's a vote of confidence that his conglomerate owns more than 21% of the credit card giant's outstanding shares.

American Express (AXP) reachead $276.52 at the closing of the latest trading day, reflecting a +0.13% change compared to its last close.