The focus on Tuesday was on Alphabet (GOOG)(GOOGL), as the Google parent inched closer to becoming the fourth company in history to achieve a market valuation of $4T.
While the push towards the milestone has been led by positive developments for the tech giant in the AI space, a newly disclosed stake in the firm by Warren Buffett’s Berkshire Hathaway (BRK.A)(BRK.B) has also boosted investor sentiment.
Buffett’s sprawling conglomerate on November 14 revealed that it had acquired 17.8M shares of Alphabet’s class A shares (GOOGL) valued at ~$4.34B in Q3 2025.
Traders liked the news, sending the Google parent’s class A shares (GOOGL) up +3.1% the following trading day. They have surged +15.3% since then up to their last close. Meanwhile, Alphabet’s class C shares (GOOG) have advanced +15 in that same time period.
Buffett’s Berkshire (BRK.A)(BRK.B) has a history of affecting stock movements following its quarterly equity move disclosures. The legendary CEO is famed for his business acumen, and his stock picks are closely watched.