There aren't any rules about this, and anyone who tells you that there are hasn't been doing this for very long. Unfortunately, however, equity is one of those places where you have to assert yourself and potentially be a temporary asshole to get what you want. You should have asserted yourself and your claim from the beginning (I.e., "this is my company, here's what you could get if you joined"), but it seems you've missed that opportunity. I'm actually surprised you have allowed this to drag on for such a long period of time -- take care of it immediately. The only "rule" is to do whatever you can get away with that leaves you with the greatest share while keeping others happy. Oh and, whoever tells you to ask your INVESTORS how to split it up is truly ... Well ... Nevermind. :)
