Berkshire Sells 77% of Amazon Stake Post-Buffett Retirement, Piles Into Alphabet

Berkshire Hathaway disclosed selling 7.72 million Amazon shares (77% of its ~10M stake, ~$1.7B) while buying 17.85 million Alphabet Class A shares ($4.3B), per latest 13F filings after Warren Buffett's Dec. 31, 2025 retirement. This marks a sharp reversal from a March 31, 2026 article highlighting the unchanged ~10M AMZN position—initiated in 2019—as a Buffett-style bet on AWS moat and cash flow. The shift signals valuation worries and AI capex concerns for Amazon versus Alphabet's $126.8B cash pile and 89-93% search dominance, pressuring AMZN while boosting GOOGL.