Earlier quoted context omitted.
> I imagine those three companies have minted quite a few IC millionaires How would that compare with, say, the average IC (not management) employee of an investment bank or a hedge fund?
It's not a comparison, people either got "really rich" working for a big tech company, or they didn't.
Trying to set a threshold for what counts as "really rich" is the reason for the comparison I was asking about. My sense is that the average employee of an investment bank or hedge fund is a lot richer than the average employee of Apple, Facebook, or Google.