Bill Ackman's Bold Bet: Why Uber Is His Top Holding

Uber stock is up big, and billionaire investor Bill Ackman is betting the run isn't over.When a high-profile investor like Bill Ackman makes a bold portfolio move, it's worth paying attention. And in 2025, Ackman did exactly that: Earlier this year, he revealed a massive stake in Uber Technologies (UBER 1.22%), a move that made the rideshare platform his largest holding.Uber has long been a controversial stock, burning cash in its early years, dogged by regulatory battles, and constantly trying to prove its ...