What happened: UnitedHealth Group (UNH) stock dropped more than 3% in premarket trading on Monday.

What’s moving the stock: Berkshire Hathaway (BRK-A, BRK-B) disclosed that it no longer holds a position in the health insurer. Berkshire said it sold its entire stake of more than 5 million UnitedHealth shares in the last quarter.

In a 13F filing detailing holdings as of March 31, the first released under Berkshire CEO and Warren Buffett’s successor Greg Abel, the conglomerate also showed it increased its stake in Alphabet (GOOGL, GOOG) and exited its Amazon (AMZN) investment.

What else you should know: UnitedHealth is undergoing a turnaround plan launched last year to combat falling profits, high medical costs, and regulatory headwinds. In April, the health insurer beat Wall Street’s earnings expectations and raised its full-year profit forecast, sending the stock soaring.

Year to date, the stock is up roughly 19%, recovering from a sharp sell-off in January when the Trump administration proposed a lower-than-expected increase for 2027 Medicare Advantage plans.

Ines Ferre is a senior business reporter for Yahoo Finance. Follow her on X at @ines_ferre.

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