Rick Wilking/Reuters
- An early Berkshire Hathaway investor joined the Forbes 400 list of wealthiest Americans this year.
- Stewart Horejsi, who first bought into Warren Buffett's company in 1980, has a $3 billion net worth.
- Horejsi paid less than $300 for his first Berkshire shares, which are now worth $522,000 each.
Warren Buffett has overseen a more than 4,000,000% increase in the value of Berkshire Hathaway stock since becoming CEO in 1965. One of his early shareholders just made Forbes' annual rundown of the 400 wealthiest Americans, largely because he owns Berkshire stock.