Few investors have garnered as much prominence on Wall Street as Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) CEO Warren Buffett. In the 58 years the Oracle of Omaha has held the reins, he's overseen a 4,264,684% increase in his company's Class A shares (BRK.A), as of the closing bell on July 21, 2023.

Although Buffett isn't infallible, he's demonstrated a knack for picking winners over the long run. Yet what's interesting about his investing approach is his penchant for portfolio concentration.

Berkshire Hathaway CEO Warren Buffett. Image source: The Motley Fool.

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Source Fool.com