There was a lot of speculation about that but I'm not sure if there's any consensus. Individual tax returns only show income, and business returns only show book values (not fair market value which would help determine wealth). He had pretty big net operating loss carryovers from previous years which essentially zeroed out his income for a few years, so it's hard to say. I feel like I remember looking for foreign account disclosures but didn't see them in the returns, which would be at least one set of FMV numbers to go with. It's been a while since I looked though. Overall I walked away being disappointed so I'll stick with my original assessment, maybe I take another look later today though.