Unafraid of concentration risk, Ackman channels billions into select names he believes are undervalued giants, as evidenced by past winners like Chipotle Mexican Grill ( ) and Hilton Worldwide Holdings ( ). His strategy prioritizes quality management and long-term moats over diversification. In the first quarter, he launched a blockbuster stake in Uber Technologies ( ), acquiring 30.3 million shares worth $2.21 billion at the time - now valued at $2.8 billion and comprising 21% of his $13.7 billion portfolio. Yet, he hasn't added since, content with the position amid Uber's rally.