Knowledge Graph

Explore the interconnected web of Warren Buffett's investment universe.69 letters, 49 concepts, 32 companies, and 10 key people — all linked by 102+ cross-references.

69
Letters
49
Concepts
32
Companies
10
People
102
Cross-References
68
Years Covered

Interactive Knowledge Map

68 nodes · 116 connections
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Featured Letters

1977The Moat Speech - 19771985The Textile Exit & Quality Companies - 19851988Coca-Cola & Federal Home Loan Bank - 19881996The Circle of Competence - 19962016The Apple Investment & Elephant Hunt - 20162025Gregory Abel's First Letter - 2025

Key Concepts

Intrinsic Value83 lettersMargin of Safety41 lettersEconomic Moat56 lettersCircle of Competence22 lettersCompounding38 lettersInsurance Float35 letters

Featured Companies

Berkshire HathawayBRK.A / BRK.BNational IndemnitySee's CandiesGEICOGEICOBurlington Northern Santa Fe (BNSF)BRK.BCoca-ColaKO

Key People

Warren BuffettChairman & CEO, Berkshire Hathaway; Author of all Shareholder LettersBenjamin GrahamProfessor, Investor, Author of "The Intelligent Investor"Charlie MungerVice Chairman, Berkshire Hathaway (1978–2023)Ajit JainVice Chairman, Insurance Operations, Berkshire HathawayGreg AbelCEO, Berkshire Hathaway (2025–present)