I have a situation where I had a number of un-exercised stock options on the date of separation (18AUG2007) and I'm not sure about valuation. Note that as of today, all of those options have been exercised, so there are "real" numbers available, but I'm not if they come into play since they were all exercised after the date of separation.

I realize there are some simple as well as more complex models for valuation, but what seems the most reasonable course of action here? Because all of the stock options have been exercised and their value realized, I suppose I could take each exercise date and post-tax (?) proceeds and discount them back to the date of separation. Not sure about what discount rate to use and how to handle the taxes.

Any feedback on this matter would be greatly appreciated. My wife and I are still trying to do the divorce without going "all out" with hiring attorneys, but this matter may be a bit more contentious and complex.