On November 18, 2025, Berkshire Hathaway disclosed a new stake of 17.86 million Alphabet shares, valued at over $5 billion, marking its largest new tech investment since Apple and signaling a notable shift in its portfolio strategy[1][2]. This move has drawn significant attention due to Berkshire's historical reluctance toward tech stocks and the size of the investment, which is twice its Amazon stake[2]. The announcement has been widely cited as a key reason for Alphabet's recent share price gains and has contributed to positive sentiment around Berkshire Hathaway, with BRK-B closing at $504.37 (+0.22%) on November 18, 2025, following the news[1][2].