Berkshire Hathaway: plain-English disclosure as moat

The four habits that made the letters the gold standard.

1. Admit mistakes. With numbers attached. In 1993 Berkshire bought Dexter Shoe for $433 million, paid in Berkshire stock. The business went to zero. Buffett did not bury it. In the 2007 letter he wrote: "To date, Dexter is the worst deal that I've made". And quantified the real damage: by paying in stock, he "gave away 1.6% of a wonderful business" to buy a worthless one. He returned to it again in the 2014 letter, calling it a "financial disaster" deserving "a spot in the Guinness Book of World Records." Two decades of voluntarily re-litigating his own worst error, in his own annual report.

2. Define every yardstick. And never change it silently. Page one of the letter has carried the same performance table for decades: Berkshire's annual per-share change against the S&P 500 including dividends, every year back to 1965, losses included. When a yardstick did change, the change itself was disclosed and argued in plain sight rather than slipped into a footnote. Berkshire publishes no adjusted EBITDA, no "community-adjusted" anything. When Buffett wants investors to look past GAAP net income, he explains exactly why, shows both numbers, and lets the reader decide.

3. Write for the intelligent non-professional. In his preface to the SEC's Plain English Handbook (1998), Buffett described his method: when writing Berkshire's annual report, he pretends he is talking to his sisters. Highly intelligent, but not accounting or finance experts. His suggested fix for any issuer struggling to write clearly: "Just begin with 'Dear Doris and Bertie.'"

4. Put reputation explicitly above earnings. When the Salomon Brothers Treasury-auction scandal forced Buffett to step in as interim chairman in 1991, he told employees. And repeated before a House subcommittee, on camera: "Lose money for the firm, and I will be understanding; lose a shred of reputation for the firm, and I will be ruthless." Disclosure culture is just that sentence, applied to paper.

Berkshire's letters are not marketing. They are the disclosure document. Written as if the reader's understanding, not the writer's protection, were the point.

What sixty years of candor buys.

Candor did not produce the 19.9% compound return. Capital allocation did. But candor is what let shareholders stay invested through it: through the 1970s, through Salomon, through quarters when the new GAAP rules printed multi-billion-dollar headline losses Buffett had already taught his readers to look past. A shareholder base that understands the yardsticks doesn't panic when the noise arrives. Because the definitions were set, in writing, years earlier.

The sternest test came last. On May 3, 2025, Buffett told the annual meeting that Greg Abel should become chief executive at year-end. On January 1, 2026, Abel took office. The first CEO change in sixty years. With Buffett staying on as chairman. The transition was disclosed in plain language, well in advance, with the successor publicly identified years before that. No leak, no euphemism, no 8-K surprise. The company is already operating normally under its new CEO. That is what a disclosure moat looks like when it matters most.

The honest caveat: candor alone compounds nothing. Berkshire earned the right to be believed by also being right, decade after decade. But the reverse is just as true. Identical results communicated with spin, shifting yardsticks, and buried mistakes would have built a fraction of the trust, and trust is what holds a shareholder register together in the bad years.