Bill Ackman Bought Only 1 New Stock. Here's Why the Billionaire is Bullish on Meta

Group 1 - Bill Ackman purchased approximately 2.7 million shares of Meta Platforms valued at around $1.8 billion, making it the fifth-largest holding in his portfolio, accounting for about 11% of the total $15.5 billion portfolio [1] - Meta generated $200 billion in revenue in 2025, reflecting a 22% year-over-year growth, primarily driven by its core Family of Apps segment [1] - Meta's AI-driven ad ranking has delivered four times more revenue impact compared to simply increasing ad load, enhancing user engagement and ad targeting [1] Group 2 - Ackman completely exited his position in Chipotle Mexican Grill and increased his stake in Amazon by about 65%, bringing it to approximately 9.6 million shares, which now represents 14% of the portfolio [1] - Meta leads the digital advertising market with over 3.5 billion daily active users, showing a user growth of 7% in Q4 [1] - Meta trades at 22 times forward earnings, which is considered attractive given its growth prospects, with the core advertising business valued at a forward P/E of under 20 times [1]