This article first appeared on GuruFocus.

Berkshire Hathaway trimmed its Apple (NASDAQ:AAPL) stake and opened a large position in Alphabet (NASDAQ:GOOGL), according to a recent filing with the U.S. Securities and Exchange Commission.

The filing shows the conglomerate sold roughly 74% of its Apple holding, disposing of about 677 million shares since September 2023, and bought approximately 17.8 million Alphabet shares worth about $4.3 billion.

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The move marks a notable shift away from Berkshire’s long-standing heavy exposure to Apple and represents one of its biggest tech bets in recent quarters.

Analysts say the sales likely reflect a desire to lock in gains and manage tax positioning, even as Apple’s China sales, driven by the iPhone 17, remain strong.

The market reacted positively to the Alphabet purchase as investors priced in potential upside from Google’s cloud and AI businesses.

Berkshire remained a net seller overall in the quarter, but the new Alphabet stake signals a more opportunistic posture as Warren Buffett (Trades, Portfolio) nears the end of his long tenure.