It is sort of an IPO if you squint. With all the potential downside:
I was an investor in a startup that was acquired by a publicly traded company. The deal was cash+stock, for a ~3X return on investment after a year. Not bad.
Except for SEC rule 144, which meant the stock was locked up for 6 months, during which the acquiring company dropped 50% (for reasons unrelated to this acquisition).
Had the deal been all stock, that would mean 1.5X return the day I could realize .... except that I've already paid 48% taxes (35% federal + 13% nyc) on the 3X number. So it wouldn't have been a 3X return -- it would have been COMPLETE LOSS OF CAPITAL on a successful investment - or 100% loss.
Luckily for me, the stars, dates and cash/stock percentages aligned in such a way that it ended up being a modest 20% return after taxes. But a deal such as this could end up a significant net loss. (and so can an IPO).
Luckily for the other employees and most other investors, the acquired company was located in a country that has a reasonable tax regime - in which you only ever pay taxes on realized gains, and only on the day you actually get any cash into your hands. Unfortunately for me (and a couple of other investors), I have to deal with the US tax regime.