Ackman's Strategic Shift: From Alphabet to Amazon and Meta in the AI Race

Billionaire investor Bill Ackman is making bold moves in the artificial intelligence space. For years, his hedge fund Pershing Square Capital Management built its primary AI exposure through a massive stake in Alphabet. But recent regulatory filings reveal a dramatic portfolio reshuffle: Ackman has dramatically reduced his Google position while significantly expanding bets on Amazon and Meta Platforms.

This isn’t random market timing. The legendary value investor is following a deliberate strategy—one that suggests where the real AI opportunities may lie in the coming years.

Amazon Gets the Greenlight: Doubling Down on the Cloud Giant

Ackman’s most telling move was his continued accumulation of Amazon stock during the fourth quarter. After initially establishing a position last year, Pershing Square added another 3.8 million shares to its existing 5.8 million-share holding. This aggressive build-out tells us something important: Ackman believes Amazon is undervalued relative to its AI potential.

The logic becomes clear when you examine how Amazon and Alphabet are competing in artificial intelligence. Both companies are constructing fully integrated AI ecosystems—meaning they control the entire value chain from data centers to chips to end-user applications.

Consider their cloud infrastructure dominance. Amazon Web Services maintains the industry’s largest share at 28%, while Google Cloud trails in third place with just 14%. Both are now pursuing an identical strategy: develop proprietary silicon to reduce reliance on Nvidia’s architectures. Amazon is rolling out its homegrown Trainium and Inferentia chips, just as Alphabet partners with Broadcom on custom processors.

Beyond cloud computing, both firms are aggressively exploring AI capabilities across consumer electronics, autonomous vehicles, robotics, and quantum computing. So why rotate out of Alphabet into Amazon?

Stock performance tells part of the story. Throughout 2025, Alphabet experienced a remarkable bull run, while Amazon’s shares remained relatively flat. For a value investor like Ackman, selling a winner trading at elevated valuations to buy a comparable business trading near its 52-week lows simply makes disciplined sense.

Meta: The Misunderstood AI Opportunity

The surprise move came when Pershing Square established a new position in Meta Platforms during the fourth quarter, acquiring 2.7 million shares. On the surface, skeptics dismiss Meta’s AI prospects—after all, the company is fundamentally an advertising business, and many worry about management’s capital allocation given the infamous metaverse spending spree.

But beneath these concerns lies an extraordinary AI-powered business engine: Advantage+.

Meta’s AI-driven advertising suite is operating at an impressive $60 billion annual revenue run rate, according to recent management commentary. What makes Advantage+ revolutionary is its delivery of genuine business results for advertisers. The platform’s machine learning algorithms have dramatically improved return-on-investment for marketing campaigns—meaning Meta’s customers are getting better outcomes and sticking around longer.

The opportunity is breathtaking: Meta can expand Advantage+ across its entire user ecosystem of 3.6 billion daily active people spanning Facebook, Instagram, and WhatsApp. As advertisers become dependent on these AI capabilities, Meta’s platform becomes increasingly sticky and its pricing power strengthens.

When Quality Meets Valuation: A Rare Setup

Recent weeks have brought meaningful corrections to both Amazon and Meta. Amazon shares sold off after signaling elevated capital expenditure plans for 2026. Meanwhile, Meta remains in a “prove-it” cycle as skeptical investors await confirmation that AI investments will translate into profits.

This combination has created an unusual market dynamic: both Amazon and Meta are now trading at their most attractive forward price-to-earnings valuations since the artificial intelligence boom began. The market is allowing near-term uncertainties to overshadow long-term advantages.

Institutional investors like Ackman are taking the opposite view. They’re examining the bigger picture—one where Amazon’s cloud dominance and custom silicon capabilities, combined with Meta’s advertising AI revolution, position both companies as primary beneficiaries of the AI era.

For retail investors with long-term horizons, the case for following this institutional playbook appears compelling. When quality businesses face temporary pressures and trade at attractive valuations, history suggests this combination rewards patient capital.