Berkshire sells 5M UnitedHealth shares

Berkshire Hathaway’s exit from UnitedHealth landed in public view on May 18, when the conglomerate’s latest 13F filing showed it no longer held the insurer’s shares as of March 31. The disclosure confirmed Berkshire sold roughly 5 million shares during the first quarter, ending a position it had first revealed in August 2025. UnitedHealth shares fell more than 2% on Monday after the filing became public, according to Reuters. The sale matters partly because Berkshire’s UnitedHealth investment had been brief. Berkshire first disclosed the stake in August 2025, after buying 5 million shares of the company, a move that had lifted UnitedHealth stock at the time as investors bet on a turnaround under Chief Executive Stephen Hemsley, Reuters reported. Monday’s filing showed that position was gone by the end of the first quarter. (money.usnews.com) ### How do we know Berkshire sold the whole position? Berkshire Hathaway’s quarterly 13F filing is the source of the disclosure. Reuters reported that the filing showed Berkshire had sold its stake in UnitedHealth as part of a broader first-quarter portfolio reshuffle under Chief Executive Greg Abel. The filing reflected holdings as of March 31, which means the sales occurred sometime during the January-to-March quarter rather than on May 18 itself. (money.usnews.com) The SEC requires large institutional investment managers to report many U.S.-listed equity holdings on Form 13F. Berkshire’s filing therefore gives investors a dated snapshot of what the company owned at quarter-end, not a live trading log. ### Why did UnitedHealth shares react right away? UnitedHealth shares fell more than 2% on Monday after Berkshire’s filing was disclosed, Reuters said. (money.usnews.com) The move reflected how closely investors watch Berkshire’s portfolio changes, especially in large-cap companies where Berkshire’s buying or selling can be read as a signal by the market. (sec.gov) August 2025 offers the clearest comparison. Reuters reported that Berkshire’s initial disclosure of the 5 million-share UnitedHealth stake had lifted the stock as investors interpreted the purchase as support for a recovery story. Monday’s decline showed the reverse effect when that support disappeared. (money.usnews.com) ### Was this a long-term Berkshire bet? The timing suggests no. Berkshire first disclosed the UnitedHealth position in August 2025 and had exited it by March 31, 2026, according to Reuters and follow-up market reports based on the filing. That makes it a holding measured in months, not years. (money.usnews.com) Reuters also described the transaction as part of a broader first-quarter portfolio reshuffling under Greg Abel. Berkshire did not publicly attach a reason for the UnitedHealth sale in the filing excerpt cited by Reuters. ### Why is UnitedHealth under heavier scrutiny than a routine stock move would suggest? (money.usnews.com) UnitedHealth was already facing unusual attention beyond the portfolio disclosure. AP reported on May 18 that Judge Gregory Carro ruled prosecutors can use a gun and notebook as evidence in the murder trial of Luigi Mangione, who is accused in the killing of UnitedHealthcare Chief Executive Brian Thompson. Carro rejected a defense argument that the items were seized illegally. (money.usnews.com) AP said the ruling was a win for prosecutors because it allows jurors to see what prosecutors describe as a possible murder weapon and motive evidence. The case is separate from Berkshire’s investment decision, but it keeps UnitedHealth and its insurance unit in the news as investors assess the company. (usnews.com) ### What comes next for investors and for the criminal case? Berkshire’s next required 13F filing will give investors another snapshot of its U.S. equity holdings after March 31. UnitedHealth investors, meanwhile, will be watching whether the company addresses market reaction and whether other large shareholders change positions in subsequent filings. (usnews.com) In New York, AP reported that Mangione’s state murder trial tied to Brian Thompson’s killing is scheduled to begin in September. That case will keep named participants including Mangione, prosecutors and Judge Gregory Carro in focus in the months ahead. (wjla.com) (sec.gov)