$Berkshire Hathaway B(BRK.B.US)Key information about Berkshire Hathaway's investment in UnitedHealth

Core fact: All positions have been liquidated

First and most importantly: Berkshire Hathaway no longer holds any UnitedHealth stock.

This investment occurred in the past and has been fully sold. The specific timeline and scale are as follows:

· Initial purchase: Around Q4 2018, Berkshire first established a position in UnitedHealth, buying approximately 2.3 million shares.

· Major accumulation period: In Q2 2020, Berkshire significantly increased its holdings by about 5.4 million shares, bringing total ownership to approximately 7.7 million shares.

· Liquidation: Berkshire's Q4 2021 13F report showed complete liquidation of all ~4.3 million UnitedHealth shares held.

At its peak, UnitedHealth's market value represented a very small portion of Berkshire's portfolio (far below 1%), making it a relatively small-scale investment experiment.

Why buy then sell? (Market analysis and interpretation)

This "exploratory" investment and eventual liquidation reflect Buffett and his team's complex perspective on the healthcare sector:

1. Investment rationale (why buy):

· Quality company: UnitedHealth is America's largest health insurer with strong market position, exceptional management (CEO Andrew Witty was highly praised by Buffett), and robust business model.

· Industry moat: Healthcare is a necessity-driven sector in the US with massive scale and certain entry barriers.

· Financial health: The company has abundant cash flow and stable profitability.