Knowledge Graph

Explore the interconnected web of Warren Buffett's investment universe. 84 letters, 49 concepts, 32 companies, and 10 key people — all linked by 116+ connections.

84
Letters
49
Concepts
32
Companies
10
People
116
Connections
70
Years Covered

Interactive Knowledge Map

70 nodes · 116 connections
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Data Insights

Most Connected Concept

Intrinsic Value appears in 83 letters and has 16 cross-references.

Most Referenced Letter

1956 The Partnership Agreement - 1956 has 0 cross-references — the most of any letter.

Year Coverage

70 years covered. The archive spans 70 years of investment wisdom.

Top Letters by Influence

1956The Partnership Agreement - 19560 refs1957The First Year - 19570 refs1958The Year of the Recession - 19580 refs1959The Year of Euphoria - 19590 refs1960The Year of Contradiction - 19600 refs1961Semi-Annual Letter — July 19610 refs

Key Concepts

Intrinsic Value83 lettersEconomic Moat56 lettersLong-Term Investing52 lettersFree Cash Flow48 lettersValue Investing47 lettersCompetitive Advantage44 letters

Featured Companies

Berkshire HathawayBRK.A / BRK.BCoca-ColaKOGEICOGEICOAmerican ExpressAXPSee's CandiesWells FargoWFC

Key People

Warren BuffettChairman & CEO, Berkshire Hathaway; Author of all Shareholder LettersCharlie MungerVice Chairman, Berkshire Hathaway (1978–2023)Benjamin GrahamProfessor, Investor, Author of "The Intelligent Investor"Ajit JainVice Chairman, Insurance Operations, Berkshire HathawayGreg AbelCEO, Berkshire Hathaway (2025–present)Ronald OlsonPartner, Munger, Tolles & Olson