Berkshire Hathaway has revealed a significant new investment in Google's parent company, Alphabet, according to its latest filings. The conglomerate purchased 17.86 million shares, a stake valued between $4.3 billion and $5.18 billion, making it one of Berkshire's top ten largest equity positions. This move marks a notable expansion into the technology sector for the firm, historically cautious with such investments. The acquisition is being interpreted as a significant bet on the future of artificial intelligence and digital infrastructure. While the purchase was likely executed by investment managers Todd Combs or Ted Weschler, its substantial size suggests approval from Warren Buffett. While there is no direct analysis of BRK-B's stock reaction, the news was received positively for Alphabet, whose shares climbed following the disclosure. This investment contrasts with Berkshire's recent trimming of its largest holding, Apple, signaling a strategic reallocation of capital within the tech industry.