In-N-Out Burger was founded in 1948, but new blood has recently taken over. The California-based fast-food chain is run by current owner and president Lynsi Snyder, the 35-year-old granddaughter of the couple who started it. The In-N-Out heiress received full control of the company upon her 35th birthday in 2017, and according to Forbes’ most recent ranking, has become one of the youngest billionaires in the country as a result with an estimated net worth of $1.21 billion.