If you look at the companies that went public from 2018-2021 (boom/tail end of the latest "bubble"), you should assume that all of those generated somewhere in

If you look at the companies that went public from 2018-2021 (boom/tail end of the latest "bubble"), you should assume that all of those generated somewhere in the range of 25-500+ non-founders who cleared $1m+ worth of stock pre-tax (a small-mid cap SaaS will be on the lower end, Uber/AirBnB will be at the higher end). It's harder to know from acquisitions, but I'd guess that most of those with sale prices >$1b generated ~10-250 non-founders with $1m+ share packages. I think that the Qualtrics founders said that they minted 250 millionaires from their initial sale to SAP.