I don't doubt that Buffett knows its business quite well. After all, he bought a stake in UnitedHealth for Berkshire's portfolio in 2006 and owned the stock for three years.

UnitedHealth: Berkshire Hathaway Announces Initial, Large Stake in Beleaguered MCO Julie Utterback Aug 15, 2025 Stock Analyst Note ...

UnitedHealthcare dropping some Medicare Advantage plans, affecting 600,000 Stock fell 7% Tuesday as Eden Prairie-based health care giant’s new earnings projections are short of expectations.

UnitedHealth shares were down nearly 5% on Tuesday. They have fallen more than 40% this year. UnitedHealth and other insurers have been hit hard this year by elevated medical costs.

UnitedHealth raked in $111.62 billion in revenue for the second quarter, up more than 12% from the same period a year ago due to growth within UnitedHealthcare and the company's Optum unit.

UnitedHealth Group's ROE over the past 12 months was 22.7%. Despite its disappointing Q1 results, UnitedHealth Group's revenue still grew $9.8 billion year over year to $109.6 billion.