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Stocks given by company vest if I quit?
You were probably not given stock, but stock options.  Those options have a strike price and you can do some more research on them if needed.  Lets assume that you were given 5K shares at a strike of 20, and they vest 20% per year.  Assume the same thing in your second year and you are going to leave in year three. You would have 2K shares from your year 1 grant, and 1K shares from your year 2 grant, so 2K total. If you leave no more shares would be vested. If you leave you have one of two options: To complicate matters subsequent grants may have different strike prices, so perhaps year two grant is at $22 per share.  However, in pre-public companies that is not likely the case. For a bit of history, I worked at a pre-ipo company and we were all going to get rich.  I was given generous grants, but decided to leave.  I really wanted to buy my options but simply didn't have the money.  Shortly after I left the company folded, so the money would have been thrown away anyway.  When a company is private the motivate their employees with tales of riches, but they are not required to disclose financial data.  This company did a very good job of convincing employees that all was fine, when it wasn't. Also I received options in a publicly traded company.  Myself and other employees received options that were "underwater" or worth far less than the strike price.  You could let them expire so one did not owe money, but they were worthless. Hopefully that answers your question.