UnitedHealth Group stock is sliding 3.17% in pre-open trading today, hitting $381.35, after Berkshire Hathaway's most recent 13F filing confirmed that the conglomerate fully liquidated its entire position of approximately 5.04 million UNH shares during the first quarter of 2026.
The filing showed Berkshire sold its complete stake, a position it had only first established in the second quarter of 2025, meaning the holding lasted less than a year. The sale is part of a broader portfolio overhaul being carried out by Greg Abel, who assumed the role of Berkshire's chief executive on January 1 after Warren Buffett stepped back.
Berkshire also exited positions in Visa, Mastercard, Amazon, and Domino's Pizza in the same period, while simultaneously building a new roughly $2.65 billion stake in Delta Air Lines — a context that led many retail investors to view the UNH exit as a strategic reallocation rather than a fundamental indictment of the company.
Nevertheless, the Berkshire exit arrives alongside a cluster of existing pressures: a federal moratorium blocking new Medicare enrollments for home healthcare providers, the company's own plan to cut 1.3 million Medicare Advantage members to protect profit margins, and an unresolved DOJ investigation into its billing practices.
The stock had surged toward the $400 level in recent weeks after stronger-than-expected first-quarter earnings, improved Medicare reimbursement, and bullish guidance helped revive investor sentiment. That recovery now faces a test, as the broader market is also under pressure: the S&P 500, Dow Jones, and NASDAQ all declined in pre-market trading, with the 10-year Treasury yield rising to its highest level since February 2025 and Brent crude trading above $110 per barrel, driven by stalled Iran peace negotiations.
The combination of a high-profile institutional exit, unresolved regulatory overhangs, and a risk-off macro environment has created a particularly unfavorable pre-market setup for UNH today. The company's first-quarter earnings had delivered encouraging results, surpassing analyst expectations and prompting management to raise its full-year profit guidance — optimism that had briefly reassured investors before today's developments reignited selling pressure.
