Warren Buffett
Independently verified Chairman of the Board of Directors at Berkshire Hathaway Checked Aug 12, 2026
Capital allocation and long-term investing
The record behind the role
Berkshire Hathaway 2026 proxy statement U.S. Securities and Exchange Commission
- Organization
- Berkshire Hathaway
- Evidence state
- Independently verified
- How the role is proved
- SEC filingThe role is stated in a document filed with the SEC, where a misstatement carries a legal consequence for the filer.
- Role source checked
- Aug 12, 2026
- JMM record
- warren-buffett
- Stored relationship
- person role at organizationfrom person:jmm-slug:warren-buffettto organization:name:berkshire-hathaway
- Wikidata
- Q47213
- Known aliases
- Warren Buffett, Warren Edward Buffett
JMM keeps identity, role, statement, and forecast performance as separate records. A documented role does not imply a claim verdict or a reputation score.
Portrait: U.S. International Trade Administration, Public domain
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Start with the claims you can test
Each model starts with the person's sourced recommendation, then separates that rule from JMM's calculation and your assumptions.
Historical source, 201490/10 portfolio modelHow would a 90/10 split allocate and grow your money? 
Historical source, 2017Investment fee-drag calculatorHow much ending wealth can a fee difference consume? 
Historical source, 1987Owner earnings calculatorWhat cash can a business distribute without weakening its position? 
Historical source, 2014Five-year earnings range testIs the lower end of your five-year earnings range reasonable at today’s price? Was Warren Buffett right? The receipts.
Each audit records the exact statement, the primary source, and the verdict: supported, contradicted, or under review. The publication standard keeps attribution separate from any score.
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