Different states have different approaches to valuing stock options.
Some states assign no value. Other states assign full face value. Still other states are somewhere in between.
We suggest that you pick or negotiate some value in between. Then enter it as an Investment that pays no interest or dividends (but that may have a rate of appreciation in value). If you expect the options to increase in value, enter the expected rate of appreciation as well.
Property Division Implications
You also want to be able to reflect the tax impact on the division of property.
This FAQ explains how: