https://jacobin.com/2021/12/house-speaker-paul-stocks-inside...
PS: "without a fluctuating share price" is non-sense. Just because the share is of a private company, doesn't mean its price can't fluctuate. Why would anybody buy shares in private companies if the price couldn't fluctuate? What would be the point?
Example of a changing share price of a different (random) private company that has many different share holders over time: https://www.cnbc.com/2023/12/13/spacex-value-climbs-to-180-b...