Right, this applies more to private held firms and late game startups than public corporations, but I would still expect that the higher you typically go, the more shares one owns on average, so the weighted average of that won't be too far off compared to the actual structure, minus external shareholders. We can imagine those as foreign kingdoms that the king owes money to :P

Plus there is upwards mobility, whereas in typical feudalism there is none, but it is still funny to think about the suspiciously odd similarities.