It is kinda interesting to see how much tech has overwhelmed the top rankings. I mean, "tech in the US has doing well" has been a thing all of my life, but over the years, it's really crept up there. Almost everyone there is self-made wealthy in tech.
- Musk: manufacturing, fintech
- Page: tech
- Dell: tech (personal computers...again, manufacturing, not pure software)
- Bezos: tech (well...again, Amazon is also logistics now, though I do kinda think of it as a dot-com, not to mention being a cloud services provider)
- Brin: tech
- Zuckerberg: tech
- Ellison: tech
- Huang: tech (hardware, not software)
- Ballmer: tech
- Buffet: finance
- Ortega: fast fashion (and not in the US:Europe)
- Walton: retailing
- Arnault: luxury goods (and not in the US:Europe)
- More Walton: retailing
- Slim: Varied (and not in the US)
- More Walton: retailing
- Gates: tech
- Zhao: fintech/cryptocurrency (not in the US:China)
- Peterffy: fintech
- Bloomberg: finance, fintech
I mean, outside of Musk not fitting into pure tech, Waltons doing retailing, Buffet being a famous investor, and maybe Bloomberg, depending upon how you classify him, being finance, it's all tech now. Like, that's where the big economic growth has happened. The non-tech stuff is outside the US: two Europeans in luxury goods and retailing, and a Mexican in a huge conglomerate.
And in the US, only the Waltons are on there due to simply inheriting a shit-ton of multigenerational wealth.