Billionaire Bill Ackman Continues to Sell Shares of Chipotle in Favor of an Industry-Leading Stock Where the Addressable Market Can 10X in 8 Years

Bill Ackman's Pershing Square significantly rebalanced its portfolio in Q1 2025, divesting 85% of its long-held Chipotle (CMG) stake, driven by substantial profit-taking after the stock's 562% gain since mid-2018 and concerns over its high 40x forward P/E amid slowing comparable sales. Concurrently, Ackman made Uber (UBER) his new top holding, acquiring over 30 million shares, citing the ride-sharing market's projected 10x growth by 2033 and confidence in Uber's management. This strategic shift reflects a move from a mature, high-valuation activist play to a high-growth opportunity with a massive addressable market.

Analysis

Bill Ackman's Pershing Square executed a significant portfolio rotation in the first quarter of 2025, signaling a strategic shift from a mature value-realization play to a long-term secular growth opportunity. The fund divested 85% of its peak stake in Chipotle (CMG), a position held since 2016. This move appears driven by both successful profit-taking, on the back of a 562% share price increase since mid-2018, and emerging fundamental concerns. Chipotle's valuation, at a 40x forward P/E ratio, is high, particularly as the company reported a 0.4% decline in comparable restaurant sales and a 2.3% drop in total transactions in the most recent quarter, suggesting consumer price sensitivity is becoming a headwind. Concurrently, Pershing Square established Uber (UBER) as its new largest holding, comprising nearly 19% of its assets. The thesis for this acquisition rests on Uber's dominant market position, strong management under CEO Dara Khosrowshahi, and the massive projected growth of the global ride-sharing market, which is forecast to expand by almost 950% to $918.2 billion by 2033. However, the investment is not without immediate risks, as Uber's valuation is now considered somewhat aggressive, with a forward P/E of 27 and a price-to-sales ratio four times that of its primary rival, Lyft, alongside the threat of new competition entering the market.

Key Decisions for Investors

• Investors in Chipotle (CMG) should re-evaluate their positions, as the exit of a major activist investor combined with a high valuation and a reported 2.3% decline in transaction volume suggests the stock's primary growth and value-unlocking phase may be concluded.
• For those considering an investment in Uber (UBER), the position should be viewed as a long-term secular growth play, aligning with Ackman's thesis on its massive addressable market and trusted management team.
• Potential Uber investors must weigh the long-term growth narrative against its current premium valuation, with a price-to-sales ratio 300% higher than its main competitor, and closely monitor the impact of new competition on its market share and pricing power.
• Use this portfolio shift as a signal to review other holdings for similar characteristics: consider taking profits on mature assets with stretched valuations and decelerating fundamentals, while seeking opportunities in companies with large addressable markets and proven leadership.