I found it interesting to notice the names that WEREN'T on this list. Missing in action were some of the wealthiest people currently living: Elon Musk, Rupert Murdoch family (Lachlan, James, Elisabeth, and Prudence) members of the Walton Family (Jim, Rob, and Alice), Jacqueline and John Mars (Mars candy), Sergey Brin and Eric Schmidt (Google), and Jan Koum (WhatsApp) - to name a few of the Top 50 from the Forbes Top 400 Listing. They may be benevolent, but I would have thought more of them would have been in the 20 most generous listing or this additional Forbes Listing https://www.forbes.com/top-givers/#3d52b85a66ff.
The top four US states with Billionaires is: 1) California, 2) New York, 3) Florida, and 4) Texas - no surprises there!