BRK.B · Diversified Holding Company · Insurance
Berkshire Hathaway Inc.
The business
Berkshire is best understood as an exercise in capital allocation. A fortress insurance balance sheet provides low-cost float, which funds the ownership of dozens of durable operating businesses and a concentrated equity portfolio. It runs on patience, discipline, and a preference for owning quality over the long run.
The flywheel
Insurance float provides capital at attractive cost; that capital buys cash-generative businesses and equities; their earnings replenish the capital base, which buys more. The cycle has compounded book value for decades with minimal leverage and maximal discipline, a textbook example of the flywheel at work.
What stands out
- A diversified collection of durable, cash-generative businesses under one roof.
- Fortress balance sheet that turns market dislocations into opportunities.
- A culture of rational, unemotional capital allocation.
- Built to endure, anti-fragile by design and conservatively financed.
Key risks
- Scale makes needle-moving acquisitions harder to find.
- Leadership transition beyond the founding generation.
- A large cash balance can be a drag during sustained bull markets.
This research note reflects Flywyl's analysis as of May 2026 and is provided for informational and educational purposes only. It is not investment advice, an offer, or a solicitation, and it does not recommend buying, selling, or holding any security. Past performance does not guarantee future results. Figures and qualitative descriptors are illustrative and should be independently verified. Flywyl is a research firm; it does not manage money or hold client assets.