UnitedHealth Remains Largest U.S. Insurer By Market Cap After 40% Hit In Q2 2025

  • UnitedHealth continued to be the largest US insurer by market capitalization during the second quarter, even as it experienced a historic tumble as investors balked at earnings figures. In an analysis of the 20 largest US insurers by market cap, UNH had by far the largest decrease, falling 40.9% in the second quarter and 39.6% year-over-year.