Leopoldo Espinosa Abdalá

Leopoldo Espinosa Abdalá and his brother Fernando gets the bulk of their wealth from the 2016 sale of their drug manufacturer Rimsa, which it sold to Tel Aviv-based Teva Pharmaceuticals for $2.3 billion.

Leopoldo was the executive president of the privately-held Mexican company before the sale.

Their father founded the business in 1970 as a pharmaceutical distributor before expanding into manufacturing.

At the time of the sale Risma was known for a slew of patented products, most notably its fixed-dose drug combinations.

Following the sale, Teva sued Leopoldo and Fernando claiming fraud and a breach of contract. The charges were mostly dismissed; the parties eventually settled for less than $200 million.