Uber posted its first full-year profit since going public in 2019 and its stock hit an all-time high Wednesday as strong bookings in the final quarter of the year pushed profit and revenue beyond Wall Street expectations. Like its final year as a private company, the last time Uber turned a profit, it got a huge tailwind from investments that helped fuel profits, $1 billion in 2023. The difference is that Uber has started making money from operations.