is it possible that some early adopters/investors in Apple, Microsoft, Facebook,... or one of those big corporations with stocks still has a large amount of stocks (like 500,000 shares) and bought it at some low price (like $1) and still is holding it?
the answer is the same as what you are asking here!
some obviously have bought at low prices years ago, some of them sold, some held, some sold some and held some,....
example:
if you bought berkshire hathaway shares back in 1980 when it was worth $200 you could have bought 20 with just $4000
now that is worth $270,000 per share or $5,400,000 for 20.
Warren Buffett is the primary shareholder of this thing...