Elon Musk, the richest of nine Massachusetts billionaires on the world's Richest People list, remains at the top of the list with a net worth of $839 billion. His wealth and membership in the exclusive club hit all-time highs in 2026, indicating a growing concentration of global economic power among the ultra-rich. Other notable figures in the list include Google co-founders Larry Page and Sergey Brin, Amazon founder Jeff Bezos, and Mark Zuckerberg. The rise of wealth tied to artificial intelligence is also highlighted by the number of under-30 billionaires, with a record 35 under-31s. Women are underrepresented on the billionaire list, accounting for only 14 percent of all billionaires.