The Getty Family – $5B
Most of the Getty family’s wealth comes from the petroleum industry and their patriarchs are the father and son duo George Franklin and Jean Paul. George Franklin used to be a lawyer before becoming an oilman and after he hit it big, he gave the proceeds of his company to his son, telling him to invest in gas and oil. They did this and it paid off in a big way. The pair incorporated Getty Oil in 1916 and the mighty oil empire has been passing through the family, increasing their net worth through the generations.
The Stryker Family – $35B
The Stryker family started their business in 1941 and has dominated the medtech (medical technology) sector in America for almost half a century now. Homer Stryker was an inventor who invented new kinds of medical equipment, with the mobile hospital bed being the most well-known out of all of them. The company that Homer founded was taken over by his son Lee, and then Lee’s children after their father died in a plane crash. It is known that the Strykers support socially liberal and Democratic causes, and the family set up the Bohemian Foundation, which focuses on arts and culture, and the Arcus Foundation, which promotes LGBTQ rights.