Most investors picture Berkshire Hathaway as Warren Buffett's stock portfolio. The shares it owns in other companies are real, but they are the smallest of the three engines that drive the business.
Berkshire is a conglomerate worth about $1.07 trillion, and it makes money three ways at once. It collects insurance premiums and invests the money before claims come due. It owns dozens of companies outright. And it holds a concentrated basket of public stocks. Seeing how the pieces fit together explains why the company has compounded for six decades.
Engine One: Insurance and the Float
The foundation is insurance. Berkshire owns GEICO, one of the largest auto insurers in the country, along with the reinsurance giant General Re and a stack of specialty insurers. These businesses collect premiums today and pay claims later, sometimes years later.
The money that sits in between is called float. At the end of the first quarter, Berkshire held about $177 billion of it. That is cash the company gets to invest even though it ultimately belongs to policyholders.
Most insurers treat float as a cost of doing business. Berkshire often gets paid to hold it, because its insurance units tend to earn an underwriting profit. Money you can invest at a negative cost is the closest thing to free money in finance.
The risk is real. A bad hurricane season or a large reinsurance loss can flip underwriting profit into a loss in a single quarter. Scale and pricing discipline are what keep that risk contained.
Engine Two: The Businesses It Owns Outright
Berkshire owns more than 60 companies in full. The two biggest are BNSF, one of the largest freight railroads in North America, and Berkshire Hathaway Energy, a sprawling utility and pipeline operator.
In the first quarter, BNSF earned $1.38 billion and the energy unit added $1.11 billion. Around them sit Dairy Queen, See's Candies, Clayton Homes, the Marmon industrial group, and a long list of manufacturing, retail, and service names.
Together these operating businesses produced $11.35 billion in operating earnings in the first quarter, up 18% from a year earlier. That figure strips out the paper swings in the stock portfolio, so it is the cleanest read on how the actual companies are doing.
Owning these companies outright, instead of just their stock, is the point. Berkshire keeps every dollar they earn and decides where it goes next, which is how profit from a railroad can end up funding an insurance deal or a stock purchase.
Berkshire keeps buying. Its first big deal under new CEO Greg Abel was an $8.5 billion purchase of homebuilder Taylor Morrison, paid in cash. Deals like that turn idle money into another stream of operating profit.
Engine Three: The Stock Portfolio
The part everyone watches is the equity portfolio, worth roughly $287 billion. It is far more concentrated than most people assume.
Five positions make up about 61% of the whole book. Apple is the largest at close to 22%, followed by American Express at about 17%, Coca-Cola near 12%, Bank of America around 9.5%, and Chevron close to 7%.
These are not trades. Berkshire owns about 9.3% of Coca-Cola and more than a fifth of American Express, stakes built up over decades. The dividends alone bring in billions of dollars a year that Berkshire can redeploy elsewhere.
The flip side of concentration is exposure. When Apple has a rough year, the reported portfolio value falls hard with it. Buffett spent a career arguing that owning a few great businesses beats spreading thin, and the portfolio still reflects that conviction.
The Cash Pile That Keeps Growing
Sitting on top of all of it is a record cash position of nearly $400 billion, most of it parked in short-term Treasury bills. At current interest rates, that hoard earns Berkshire billions of dollars a year for doing nothing.
The size of the pile is also a message. Berkshire builds cash when its managers cannot find large businesses or stocks priced at levels they like. A near-record balance means they have been net sellers of stock and selective buyers of companies.
That patience carries a cost. Cash throws off a steady return, but it does not compound the way a well-bought business does. The longer the balance grows, the louder the question of when and how it gets put to work.
What Comes Next
Greg Abel became chief executive at the start of 2026, with Buffett staying on as chairman. The structure Abel inherited is built to do one thing: turn premiums, profits, and dividends into more buying power, then wait for the right moment to spend it.
The next chapter rests on how he deploys that nearly $400 billion. A few large acquisitions would show he is willing to swing the bat. A cash pile that keeps climbing would suggest he sees the same thin slate of bargains that kept Buffett patient. Either way, the machine underneath keeps collecting.
