Pershing Square

Business

Why Bill Ackman Doubled Down on Amazon: AI Infrastructure Bet Drives Pershing Square’s Third-Largest Holding

Bill Ackman’s Pershing Square boosted its Amazon stake by 65% in Q4 2025, making it the fund’s third-largest position. The move reflects growing conviction that Amazon’s pivot from e-commerce to AI infrastructure will unlock structurally higher margins, as AWS captures enterprise generative AI workloads and new ventures like Rufus and ad-supported Prime Video drive revenue.

Business

Why Bill Ackman Isn’t Letting Go of Uber Just Yet

Bill Ackman’s Pershing Square has held steady on Uber since early 2025, keeping roughly 30 million shares through Q4. As Uber shifts from ride-hailing to autonomous mobility and advertising, Ackman’s conviction appears unshaken. But is this a long-term bet or a stubborn hold?

Business

Bill Ackman Doubles Down on Amazon, Betting Big on Cloud and AI Dominance

Billionaire investor Bill Ackman significantly boosted his stake in Amazon during the fourth quarter of 2025, making it a top-three holding in his Pershing Square portfolio. The move underscores a broader institutional vote of confidence in the tech giant's long-term growth engines, even as recent insider selling adds a note of caution.