70 Years of
Buffett's Mentality,
Decoded.
Every letter from 1956 to 2025 transformed into a lossless, fully mapped knowledge graph. We cloned the ultimate investing mentality, engineered for both human minds and AI agents.
Browse Letters →AI · 60+ Years of Letters
Have an investing question? Ask the Oracle of Omaha — every answer traces back inline to its original letter.
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All 90 letters from 1956–2025. Partnership era through Berkshire annual reports, fully cross-referenced.
Concepts
37 core investment principles — from intrinsic value and margin of safety to economic moat and owner earnings.
Companies
84 companies mentioned across the letters — from See’s Candies to Apple, tracking Buffett’s evolving philosophy.
People
13 individuals who appear throughout the letters — mentors, partners, and managers who shaped Berkshire.
The Intellectual Framework
Concepts ranked by frequency of appearance across all letters.
Latest from Berkshire
2025 Letter to Shareholders
A landmark transition letter: Greg Abel's first as Berkshire's CEO, with Warren Buffett remaining as Chairman. Abel reflects on Buffett's 60-year legacy, his stewardship philosophy, and the values and culture that will guide Berkshire into its next chapter. The letter affirms that shareholder capital is held in trust — not owned — and that the principles Buffett established will endure.
2024 Letter to Shareholders
Buffett's final letter as Berkshire's CEO before transitioning the CEO role to Greg Abel. He reflects on the long arc of Berkshire's history and his confidence in Abel's leadership.
2023 Letter to Shareholders
Buffett's first letter without Charlie Munger (who passed in November 2023). A moving tribute to Munger's intellectual partnership and its role in shaping Berkshire. Buffett discusses Apple's centrality to Berkshire's value, Berkshire's cash position, and the succession picture.
2022 Letter to Shareholders
A major year for Berkshire repurchases and energy investments. Buffett makes a substantial investment in Occidental Petroleum and discusses the compounding effects of patient capital allocation.
2021 Letter to Shareholders
Buffett celebrates the American tailwind — America's extraordinary economic achievement since 1942 — and explains how Berkshire participates in it as a microcosm of American enterprise. He discusses BNSF and BHE as core pillars.