The next closest stock in the Fortune 500 list, the S&P 500 index, etc., is Lindt & Sprungli AG, the well-known Swiss chocolate company. Their stock price is around $10,000 per share right now. We'll talk about the rest of the top five below.
As most companies grow, they decide to split their stocks. Each one stock worth $10 becomes two stocks worth $5 each. This splitting allows stocks to be traded more easily, just like how it's easier to buy groceries with $10 bills than with $100 bills. Smaller units make trading easier.
However, Berkshire Hathaway did launch “B class” shares in 1996. These shares provide the same result as a stock split. The B shares are worth 1/1500 of an A share. While the A shares cost ~$350K, the B shares only cost ~$230. That's much more affordable for the average investor.
Berkshire Hathaway A shares were worth $7.50 each in 1962. That's when a young Warren Buffett first invested in the company. Buffett gained a controlling percentage of the company in 1965 and has been their CEO ever since. The company has grown 46000 times bigger since then.