Generally this is how liquidity works. Their employees will have a six or twelve month lock up (six being most common).

Investors in certrtain rounds (or sizes) tend to have no lockup, whereas later stages have a six month. Alternatively, I've reviewed agreements where the lockup is based on minimum market cap, but I've only seen that a couple of times.

Ok everyone saying this is how it works but where’s the proof? SpaceX has a 7 day lockup for some people which is abnormal. So clearly the way it’s done isn’t in fact how it’s always done.