Several Wall Street billionaires, including Bill Ackman and David Tepper, increased their Amazon (AMZN) stakes in their Q1 2026 13F filings. Pershing Square added 1.84 million shares, boosting Ackman's position by 19%. Appaloosa Management nearly doubled its Amazon position, making it the largest US equity holding at $900 million. Other managers like Daniel Loeb, Seth Klarman, and Chase Coleman also list Amazon among top holdings. The trade is driven by Amazon's resilient e-commerce cash flow, AWS cloud demand from AI, and growing digital ad revenue. Beyond Amazon, filings show a tilt toward AI-adjacent platforms like Alphabet, Nvidia, and Meta Platforms, as well as quality names like Visa. However, 13F filings are 45 days delayed and exclude options, so investors should consider live price action. The Amazon trade's persistence into Q2 depends on cloud capex guidance and advertising trends.

Key facts

• Bill Ackman added 1.84M Amazon shares, increasing position by 19%.
• David Tepper nearly doubled Amazon stake to $900M, top US holding.
• Daniel Loeb, Seth Klarman, Chase Coleman also hold Amazon.
• Broader filings show AI plays like Alphabet, Nvidia, Meta, TSMC.
• Warren Buffett bought Alphabet, trimmed Bank of America.