Microsoft Corporation's IPO opened on the stock market on February 14, 1986. The asking price of the IPO was $21.00 per share. At that time, Gates, Ballmer and the gang were making much of the company's revenue on Macintosh software, BASIC language interpreters, and the PC operating system MS-DOS.
After the IPO, Microsoft began a tremendous run -- earning large increases in revenue over the next two decades. By 2003 (a mere 13 yrs later), a $2,100 investment at the 1986 IPO offering price was worth $1.5 million. Sadly, while Microsoft has posted excellent dividends over the last 21 years, their share price has fallen by more than half from it's peak around the time of the dot com bubble.