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.
> Holding Period. Before you may sell any restricted securities in the marketplace, you must hold them for a certain period of time. If the company that issued the securities is a “reporting company” in that it is subject to the reporting requirements of the Securities Exchange Act of 1934, then you must hold the securities for at least six months
You might be referring to staff members who have shares ? Their shares are not restricted securities as far as I know, but their internal company policy might affect those, but I'm not 100% certain on that.