Warren Buffett's Berkshire Hathaway reveals new stake in beleaguered insurer UnitedHealth

Core Insights - Berkshire Hathaway has acquired a new stake in troubled insurer UnitedHealth, building this position over two consecutive quarters [1][2] - The investment amounts to over 5 million shares, valued at approximately $1.6 billion, making it the 18th largest position in Berkshire's portfolio [2] - Berkshire's overall equity portfolio is valued at around $300 billion, suggesting that the purchase may have been driven by investment managers Todd Combs and Ted Weschler rather than Warren Buffett himself [3] - Following the announcement of this investment, UnitedHealth's stock experienced a 6% increase in extended trading [3]