Ackman Sells Alphabet Stake to Fund Microsoft Position, MSFT Rises 3%

On May 16, 2026, Bill Ackman disclosed that Pershing Square sold its long-held Alphabet shares to establish a new Microsoft position after MSFT's recent price drop. Ackman stressed on X that the move was not a bet against Alphabet and that the firm remains very bullish long-term on the company, citing valuation and capital constraints instead. The reallocation triggered immediate market flows, with Microsoft shares advancing 3.05% to 421.92 while Alphabet declined 1.07% to 396.78. The episode highlights tactical portfolio rotation by a prominent activist rather than any fundamental shift in conviction on Alphabet.