These two companies still have a lot of upside left, and a stock split could be in the cards.When a company decides to split its stock, it doesn't change any of the underlying fundamentals or value of the business. Nonetheless, it usually follows significant share-price appreciation, and it signals confidence from management that the future will see the stock continue to rise. As such, many investors flock to stocks when they announce forward stock splits as well as shortly after the splits occur.This sugge ...