Key Takeaways
- Pershing Square initiated a fresh Microsoft position following a price decline, simultaneously divesting its entire Alphabet holding.
- Warren Buffett’s Berkshire Hathaway massively expanded its Alphabet ownership, surging from 18 million shares to 58 million shares—a position valued at approximately $16.6 billion.
- In an unexpected sector pivot, Berkshire established a Delta Air Lines position estimated between $2.65 billion and $3 billion.
- Both David Tepper’s Appaloosa and Ackman’s Pershing Square increased their Amazon holdings, despite Berkshire reducing its stake.
- Uber gained favor with Appaloosa and Pershing Square, signaling sustained bullishness on the platform economy model.
Recent 13F regulatory disclosures provide a window into where Wall Street’s most influential investors deployed capital during Q1 2026. These mandatory filings, published quarterly with a delay, capture portfolio positions as they stood on March 31, 2026.
While these documents don’t reveal current holdings, they offer valuable insight into where sophisticated institutional investors were allocating significant resources just months ago.
This reporting period highlighted concentrated interest in several investment themes: artificial intelligence infrastructure, cloud-based services, transportation recovery, digital commerce, and technology-enabled platforms. Five equities particularly captured the attention of elite fund managers.
The AI Cloud Battle: Microsoft Versus Alphabet
Bill Ackman’s Pershing Square Capital Management established an entirely new stake in Microsoft during Q1. According to Reuters, Ackman capitalized on weakness in the stock price, viewing the pullback as an entry opportunity with compelling valuations.
This strategic entry coincided with Pershing Square completely liquidating its Alphabet position. The timing suggests a deliberate portfolio reallocation—swapping one artificial intelligence and cloud computing leader for another.
Microsoft offers comprehensive exposure to multiple AI-driven growth vectors including Azure cloud services, the Microsoft 365 Copilot productivity suite, GitHub’s developer platform, enterprise software dominance, and its strategic collaboration with OpenAI. These business lines represent core elements of the AI transformation narrative commanding investor attention throughout 2026.
Meanwhile, Berkshire Hathaway executed the opposite strategy. Warren Buffett’s investment vehicle dramatically increased its Alphabet stake, expanding holdings from approximately 18 million shares to 58 million shares. Barron’s valued this expanded position at around $16.6 billion.
This substantial accumulation demonstrates strong conviction in Google’s search dominance, YouTube’s engagement platform, cloud computing capabilities, and Alphabet’s AI infrastructure. The divergent strategies highlight that even among elite investors, opinions differ on which AI champion will ultimately prevail—though both Microsoft and Alphabet clearly remain central to the technological transformation underway.
Unexpected Airline Investment and E-Commerce Confidence
Among this quarter’s most noteworthy developments was Berkshire Hathaway’s establishment of a new Delta Air Lines position. Reuters valued the stake at approximately $2.65 billion, while Barron’s suggested it could be closer to $3 billion.
This investment carries particular significance given Berkshire’s well-documented retreat from airline investments following pandemic-related disruptions. A renewed Delta position represents a calculated contrarian bet in an industry confronting elevated fuel expenses and macroeconomic headwinds.
E-Commerce and Ride-Sharing Platform Momentum
Amazon drew purchasing activity from multiple prominent investment firms. David Tepper’s Appaloosa Management added 2.1 million Amazon shares, elevating it to the fund’s top position with approximately $900 million in value. Pershing Square similarly expanded its Amazon stake by 19%.
Interestingly, Berkshire reduced its Amazon holdings during the identical timeframe. Nevertheless, the strong support from both Tepper and Ackman ensures Amazon remains among the quarter’s most closely monitored institutional positions.
Uber completed the quintet of standout stocks. Appaloosa purchased approximately 4.5 million additional Uber shares, growing its position to roughly $455 million in value. Pershing Square maintained Uber as a core portfolio component.
Uber appeals to institutional investors through its diversified business model encompassing mobility services, food and package delivery, advertising revenue streams, and strengthening profitability metrics. While not classified as traditional technology infrastructure, it exemplifies the platform-based business architecture that many sophisticated funds actively seek.
Collectively, these five equities—Microsoft, Alphabet, Delta, Amazon, and Uber—illuminate the strategic priorities guiding major investors as 2026 commenced: established quality businesses, artificial intelligence exposure, and scalable platform economics.
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