Here are some of the highest stock prices in history. The reasons behind these stock prices can vary but understanding them can lead to better investing.

To calculate, start with total shares outstanding and subtract the number of restricted shares. Restricted stock typically is that issued to company insiders with limits on when it may be traded.

To calculate, start with total shares outstanding and subtract the number of restricted shares. Restricted stock typically is that issued to company insiders with limits on when it may be traded.