1. From your narrative he doesn't need to provide this as the matrimonial asset is the company that he and his wife are directors of. Unless there is any matrimonial connection with the fathers company it would appear not to be relevant. 2 he should see a solicitor. The starting point is to determine the value of the matrimonial assets at the date of separation. Happy to discuss further. I hope that helps. Please leave a positive rating so that I am credited for my time.
On the face of it the value for matrimonial purposes would be the value at the separation date if it's only in one name.