person1956–present

Warren Buffett

Disciplines:

Summary

American investor and CEO of Berkshire Hathaway, widely regarded as the greatest capital allocator in history and the defining practitioner of value investing.

Core Contribution

Evolved Graham's cigar-butt value investing into a compounding-quality-business model — buying wonderful companies at fair prices and holding forever — while using insurance float as a perpetual low-cost financing mechanism.

Key Spikes & Highlights

Permanent Ownership as Competitive Advantage (tells acquisition targets he will never sell, creating a buyer category that attracts family businesses and owner-operators who would refuse to sell to private equity)
Circle of Competence as Veto Power (explicitly refuses to invest in anything outside a defined domain — has passed on Microsoft, Amazon, and Google — treating self-imposed ignorance as a risk-management discipline rather than a limitation)
Float as Structural Innovation (recognized that insurance premium float — money owed to policyholders but held in the interim — is essentially free leverage if underwriting discipline is maintained, funding Berkshire's entire acquisition machine)

Notable Works & Achievements

Berkshire Hathaway Annual Shareholder Letters

Historical Influences

Benjamin Graham Philip Fisher Charlie Munger John Burr Williams

Intellectual Lineage

Value Investing Tradition Graham-Dodd Security Analysis School Insurance Float as Capital Structure

Contemporaries & Peers

Charlie Munger Peter Lynch John Templeton George Soros Walter Schloss

Minds Influenced

Charlie Munger Bill Ackman Seth Klarman Howard Marks Mohnish Pabrai

Intellectual Posterity

Berkshire Hathaway Annual shareholder letter as investor communication standard Float-funded conglomerate structure

Discussing

Warren Buffett

Ask anything about Warren Buffett — their ideas, influences, contradictions, legacy.

person1956–present

Warren Buffett

Disciplines:

Summary

American investor and CEO of Berkshire Hathaway, widely regarded as the greatest capital allocator in history and the defining practitioner of value investing.

Core Contribution

Key Spikes & Highlights

Permanent Ownership as Competitive Advantage (tells acquisition targets he will never sell, creating a buyer category that attracts family businesses and owner-operators who would refuse to sell to private equity)
Circle of Competence as Veto Power (explicitly refuses to invest in anything outside a defined domain — has passed on Microsoft, Amazon, and Google — treating self-imposed ignorance as a risk-management discipline rather than a limitation)
Float as Structural Innovation (recognized that insurance premium float — money owed to policyholders but held in the interim — is essentially free leverage if underwriting discipline is maintained, funding Berkshire's entire acquisition machine)

Notable Works & Achievements

Berkshire Hathaway Annual Shareholder Letters

Historical Influences

Benjamin Graham Philip Fisher Charlie Munger John Burr Williams

Intellectual Lineage

Value Investing Tradition Graham-Dodd Security Analysis School Insurance Float as Capital Structure

Contemporaries & Peers

Charlie Munger Peter Lynch John Templeton George Soros Walter Schloss

Minds Influenced

Charlie Munger Bill Ackman Seth Klarman Howard Marks Mohnish Pabrai

Intellectual Posterity

Berkshire Hathaway Annual shareholder letter as investor communication standard Float-funded conglomerate structure

Discussing

Warren Buffett

Ask anything about Warren Buffett — their ideas, influences, contradictions, legacy.