That would be top 100 - and it was totally liquid. Not locked up in owner shares
https://www.bloomberg.com/news/features/2021-04-08/how-bill-...
Also anyone rich, non-domiciled and "avoiding tax" will presumably not be on the list.
https://www.forbes.com/sites/clareoconnor/2011/04/11/egyptia...
It's very likely that the richest person in the world right now is Vladimir Putin.
However, after searching for follow-ups on that story, I wasn't able to find any news article saying that any significant (>$1B) amount of wealth was found. There were $664M that were frozen in Switzerland, as well as an undisclosed amount in the EU [1] (but both freezes were annulled in the meantime). Additionally, there were some properties and luxury cars he owned in Western cities [2].
All of these (and some generous extra for wealth he was able to hide) would add up to wealth in the order of billions, but most likely below $70B, and definitely below $700B.
[0] https://dailynewsegypt.com/2018/11/25/the-years-long-tale-of... [1] https://english.ahram.org.eg/NewsContent/1/64/396228/Egypt/P... [2] https://cifar.eu/6-years-later-mubaraks-billions/
I think a lot of VCs and real estate investors would fall in this category.
Also, they're unlikely to put out public accounting statements