The easiest thing to do is find out what the current strike price is and compare it to the strike price of your options. This will tell you ONE key metric for d

The easiest thing to do is find out what the current strike price is and compare it to the strike price of your options. This will tell you ONE key metric for determining the stock's value and will help assist in estimating your tax liability. The same is true at time of negotiation. You don't really need to know how many shares are outstanding if you have the strike price and an estimate for the company's growth. That is, you're investing $X dollars and expect it to raise by a multiple of Y.