Sixty years, and the structure left behind
Every figure on this site is a measurement of something two men built. Berkshire was theirs for sixty years, and the arrangement they left is the reason the company can be valued by adding up its parts at all. This page is the part of the analysis that is not arithmetic.
The contribution is not a stock pick. It is a structure: permanent capital, insurance float that funds itself, and subsidiaries left alone to run, which is why the valuation on this site sums parts instead of forecasting a management team.
The short version Warren Buffett took control of Berkshire Hathaway in 1965 and was its chairman and chief executive for 60 years, through 2025. Greg Abel became chief executive on January 1, 2026, and on September 18, 2026 Buffett moved to Chairman Emeritus, staying on the board, with Howard Buffett elected chairman. Charlie Munger was vice chairman from 1978 until his death in 2023, at 99.
- 1 The record this site can actually source runs from 1999. Over those 26 years book value per share compounded at 10.5% a year and the share price at 10.6%. That window is the back third of the tenure and it begins after Berkshire was already large, which is the honest way to read it: this is the record of the mature company, not of the partnership years.
- 2 The contribution that outlives him is structural. Permanent capital, insurance float as the funding source, operating subsidiaries left alone, and a holding company that does nothing but allocate. None of those depend on one person continuing to pick stocks, which is why a sum-of-the-parts valuation of Berkshire is a sensible exercise and the same exercise on most conglomerates is not.
- 3 Munger changed what Berkshire bought. The shift from cheap assets to good businesses at fair prices is the single largest change of method in the company’s history, and it is the reason the operating businesses on this site are valued on earnings at 1.49× book instead of on the balance sheet.
What sixty years bought
Berkshire Hathaway was a failing New England textile business when Warren Buffett took control in 1965. It is now a group whose base case on this site comes to $1,069 B, assembled without a single transformative merger of equals, without a corporate development department, and while paying no dividend.
This site does not publish a figure for the whole tenure, because it does not hold the data to check one. Its series begins at the 1999 year end, and over the 26 years since, book value per share has compounded at 10.5% a year against 10.6% for the share price. The two rates are almost identical, and that is the point: the market paid roughly the same multiple of book at the end as at the start, so the return came from the business and not from a re-rating. The book value page sets that out in full.
Read that window honestly and it flatters nobody. It starts after Berkshire was already one of the largest companies in America, when size had begun to work against returns, and it still compounds at better than ten percent a year through two recessions and a pandemic. The earlier decades were faster. They were also conducted with a fraction of the capital.
The structure is the contribution
The popular account of Buffett is a man who picks stocks well. The more useful account, and the one this site is built on, is a man who arranged a company so that capital arrives continuously, costs nothing, and can be moved anywhere without asking permission.
“Berkshire is now a sprawling conglomerate, constantly trying to sprawl further.”
Warren Buffett · 2014 Annual Report
Insurance supplies the money. Policyholders pay premiums now and claim later, and in between Berkshire invests the difference for its own account. If the underwriting roughly breaks even, that money is free. Berkshire has mostly done better than break even, which means it has been paid to hold it. That is the engine, and it is set out on the insurance page.
The subsidiaries are left alone. Berkshire’s head office is famously small for a company this size. Managers of the operating businesses run them; the centre decides only where the cash goes next. That division is why the businesses can be valued one at a time on the valuation page, and why there is no conglomerate holding-company overhead to discount.
The capital is permanent. No fund redemptions, no investment committee, no mandate to beat an index this quarter. The capital allocation record shows what that permits: buying whole businesses in years when nobody else can, and buying nothing at all in years when prices are wrong.
He inventoried the result himself, in the fiftieth-year letter, and the list is worth reading as a description of a structure instead of a boast:
“Today Berkshire possesses: (1) an unmatched collection of businesses, most of them now enjoying favorable economic prospects; (2) a cadre of outstanding managers who, with few exceptions, are unusually devoted to both the subsidiary they operate and to Berkshire; (3) an extraordinary diversity of earnings, premier financial strength and oceans of liquidity that we will maintain under all circumstances; (4) a first-choice ranking among many owners and managers who are contemplating sale of their businesses and (5) in a point related to the preceding item, a culture, distinctive in many ways from that of most large companies, that we have worked 50 years to develop and that is now rock-solid.”
“These strengths provide us a wonderful foundation on which to build.”
Warren Buffett · 2014 Annual Report
Four of those five are balance-sheet facts this site measures every quarter. The fifth is a culture, which it cannot measure at all, and which is the only one of the five that had to be built rather than bought.
The takeaway None of those three things is a personal skill. They are arrangements, and arrangements survive the person who made them. That is the assumption behind every number on this site, and it is the assumption most worth watching over the next decade.
The system, as Munger described it
Charlie Munger was vice chairman from 1978 until 2023, and his influence predates the title by two decades. For Berkshire’s fiftieth year under Buffett he wrote a short companion piece to the annual report, Vice Chairman's Thoughts — Past and Future, which is the most useful thing ever written about how this company is actually put together. It sets out 15 numbered elements of what he calls the Berkshire system, and then makes the claim that matters:
No other large corporation I know of has half of such elements in place. Charlie Munger · 2014
The full list is his and worth reading in the original. Eight of the elements are load-bearing for a valuation, and every one of them shows up somewhere in the arithmetic on this site:
- Subsidiaries run with extreme autonomy, incorporated separately, each with its own CEO. This is why the businesses can be valued one at a time on the valuation page.
- Almost nothing at headquarters beyond a chairman, a finance chief and a handful of assistants. There is no conglomerate overhead to capitalise and discount.
- Casualty insurers always prominent, expected to produce underwriting gains and float for investment. That is the engine set out on the insurance page, and the reason the group funds itself.
- No group-wide pay, option, incentive or pension system, because subsidiaries keep their own. A cost that does not exist needs no line in the estimate.
- New subsidiaries bought with cash, not stock. The capital allocation record is what that discipline looks like over twenty years.
- No dividend while a retained dollar creates more than a dollar of market value. The whole compounding argument on this site rests on that single policy.
- Almost never sell a subsidiary, and never retire a CEO for age alone. Permanence is a term of the deal, not a preference.
- Little debt, to keep creditworthiness perfect and cash available when an unusual opportunity appears. It is also why the downside case deducts a liquidity floor instead of assuming leverage.
Read as a group these are not investing principles. They are the terms on which the company is organised, and they are what makes a sum of the parts a sensible exercise here and a dubious one at most conglomerates.
Each of them credited the other with the design
Munger’s letter is unambiguous that Buffett built this: he describes Buffett, controlling about 45% of the shares at 34 and trusted by the rest, as free to install whatever system he wanted, and says that is exactly what he did. The elements were chosen deliberately, he argues, to maximise rationality, to produce decisions whose makers stayed long enough to live with them, and to keep a head-office bureaucracy from ever forming.
In the very same annual report, Buffett returns the compliment and goes further. He calls the design of modern Berkshire Munger’s most important architectural achievement, says the company was built to Munger’s blueprint, and casts himself as the general contractor with the subsidiary CEOs as sub-contractors doing the real work. The blueprint itself he reduces to one instruction that changed everything: stop buying fair businesses at wonderful prices and buy wonderful businesses at fair prices.
That instruction is the reason every operating line on this site is valued on earnings instead of on assets, and the reason the estimate lands at 1.49× book and not near it. It is also why book value stopped describing Berkshire at all, a problem the book value page deals with directly.
The takeaway Two men spent fifty years each insisting the other had drawn the plan. The useful part for a reader is that a plan exists, it was written down while both were alive to check it, and it describes arrangements rather than talents. Arrangements can outlast the people who made them. That is the proposition this valuation is actually underwriting.
What changes now
Greg Abel became chief executive on January 1, 2026, having been designated the successor in 2021. He came to it from running everything that is not insurance, and from chairing Berkshire Hathaway Energy, which is the subsidiary on this site with the clearest record of reinvesting its own earnings at a regulated return for twenty-seven years.
The chairmanship followed nine months later. On September 18, 2026, at 96, Buffett became Chairman Emeritus and Howard Buffett, a director since 1993, was elected chairman of the board. Buffett remains a director. The reason he gave for the timing was that Abel had taken hold of the job in every respect, which is a different statement from a retirement.
For a valuation, the question is narrow. Nothing in the sum of the parts depends on who signs the annual letter. It depends on whether the subsidiaries keep earning, whether the float keeps costing nothing, and whether cash keeps being deployed at better than its opportunity cost. The first two are measured on this site every quarter. The third is the one the next ten years will answer, and the capital allocation record is where the answer will show up first.
The takeaway Sixty years of one person’s judgement is not repeatable and this site does not assume it will be. What it assumes is far weaker and far more checkable: that an insurance group that funds itself, a set of businesses that earn, and a balance sheet with no pressure on it are worth more than the market currently pays for them. That proposition was built by two people, and it no longer requires either.