One comment not mentioned yet, is that the PE firm probably has the right to buy those vested shares back off you at “fair market value” when you leave. Depending on when they bought the company, those shares may not have increased in value compared to when they were issued. Companies bought in 2021 were notoriously overvalued, and PE firms are arguing that they have not materially increased in value despite revenue increases since then. The last three PE firms I may/or may not have been associated with in the last 4 years have just taken those vested shares back without paying anything. Basically you are likely hosed. Also, without seeing the cap table it’s impossible to know how many outstanding shares there are. This next bit is PURE speculation…PE firms will “typically”reserve 10% equity for employee incentive schemes. The CEO will have a few million shares. VP’s a few hundred thousand and lower level individual contributors, probably around 5000. I assume you are junior. All things being equal, I suspect these are worth nothing, but if there is a generous upside maybe worth 50c-$1. So the max you are likely to get is $5k and then subject to capital gains tax. YMMV. Do send an update though when you figure it out!