Key Takeaways BHRG underwrites reinsurance globally, steadily boosting Berkshire's insurance underwriting earnings.BRK.B's float rose from $114B in 2017 to $174B in Q2 2025, fueling investments and acquisitions.BRK.B shares are up 5% YTD, with consensus estimates showing rising revenues through 2026.Berkshire Hathaway’s (BRK.B) insurance portfolio includes GEICO (auto insurance), Berkshire Hathaway Primary Group and Berkshire Hathaway Reinsurance Group (“BHRG”). While GEICO serves as the cornerstone, BHRG i ...