Warren Buffett has lost over $265 million on historic UnitedHealth stock bet

Core Viewpoint - UnitedHealth's stock has significantly declined, falling below the level at which Berkshire Hathaway established its position, resulting in substantial unrealized losses for Berkshire [1][2]. Group 1: Stock Performance - UnitedHealth's shares dropped from $311 at the end of June 2025 to $259, representing a decline of approximately 17% [1]. - The decline has resulted in an unrealized loss of $267 million for Berkshire Hathaway based on the June 30 closing value [2]. Group 2: Investment Context - Berkshire Hathaway acquired 5,039,564 shares of UnitedHealth valued at $1.57 billion during the second quarter of 2025, marking its first significant ownership since selling its previous stake in 2010 [1][3]. - The shares were purchased while UnitedHealth was already facing significant challenges, trading well below its 2024 highs of over $600 [2]. Group 3: Company Challenges - UnitedHealth's medical care ratio increased from the mid-80% range to nearly 89%, driven by higher claims costs due to increased utilization of deferred post-pandemic care and elevated expenses in its Medicare Advantage business [4]. - The company repeatedly cut its 2025 earnings guidance, suspended forecasts in May, and ultimately reported results that fell short of Wall Street expectations [6]. - A criminal investigation by the Justice Department into potential Medicare fraud and billing practices has added to the company's pressures, alongside soaring medical costs and regulatory scrutiny [7].