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Bill Ackman's Pershing Square boosts MSFT stake to 5.65M shares; trims AMZN in Q1 2026 13F

Bill Ackman's Pershing Square Capital Management disclosed a significant increase in Microsoft holdings (new 5.65M shares as of Q1 2026 end) and a reduction in Amazon holdings in its latest 13F filing, signalling confidence in MSFT's AI infrastructure play and relative caution on AMZN. The moves reflect a strategic shift into mega-cap tech names positioned to benefit from AI capex cycles.

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Bill Ackman's Pershing Square boosts MSFT stake to 5.65M shares; trims AMZN in Q1 2026 13F has gained +0% in mention volume over the past 24 hours. Sentiment is constructive. Coverage is led by tier-1 financial press with cross-platform amplification.