First - Fossil Fuelled - Trillionaires ?
(300 year old SaudRoyalFamily wealth
$1.4 trillion when inclusive of owning Saudi #Aramco )
https://en.wikipedia.org/wiki/House_of_Saud
Aramco - was Arabian-American Oil Company - fourth-largest company in the world by revenue, headquartered in #Dhahran.
Saudi #Aramco operates the #Ghawar Field - the world's largest onshore oil field; and the #Safaniya Field - the world's largest offshore oil field.
https://en.wikipedia.org/wiki/Saudi_Aramco