How to value startup equity after Series A and beyond?

Question

There has been a lot of previous HN discussion on evaluating startup offers, but it tends to be focused on very early stage startups.How do you value your equity in a startup that has raised a Series A round, or a later round, but is still years away from (possible) IPO or acquisition?What does your process look like for reaching a NPV for your equity, compared to the nominal value of the equity based on the most recent round?

sharemywin · Accepted Answer

would there be some kind of risk of you getting diluted or stripped of your equity because you left early and the next time they raise more money they screw you?