As CEO and primary shareholder of Berkshire Hathaway, Warren Buffett, the world's most famous investor, has developed a well-known reputation of buying big stakes in companies he believes in.

When Buffett buys shares of a company for Berkshire Hathaway, the markets translate his moves as a vote of confidence for a firm's continued success.

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Although Berkshire Hathaway's holdings change, the company's most recent SEC filings* reveal where the 'Oracle of Omaha' is most heavily invested. This list does not include wholly owned subsidiaries of Berkshire.

All holdings are as of June 30, 2012, as reported in Berkshire Hathaway's 13F SEC filing on August 14, 2012. Holding values are calculated as of market close on August 14, 2012

Below are some of the biggest holdings of Berkshire Hathaway, click over to CNBC for the full list:

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  • Coca-Cola

    <strong>Holding Value:</strong> $15.75 billion <strong>Shares:</strong> 400,000,000 (split adjusted) <strong>Stake in company:</strong> 8.9 percent <a href="http://www.cnbc.com/id/33608379?slide=16">Read more at CNBC.</a>

  • Wells Fargo

    <strong>Holding Value:</strong> $13.96 billion <strong>Shares: </strong>411,045,245 <strong>Stake in company:</strong> 7.8 percent

  • IBM

    <strong>Holding Value:</strong> $13.22 billion <strong>Shares:</strong> 6,645,396 <strong>Stake in company:</strong> 5.8 percent <a href="http://www.cnbc.com/id/33608379?slide=14">Read more at CNBC</a>.

  • American Express

    <strong>Holding Value:</strong> $8.50 billion <strong>Shares:</strong> 151,610,700 <strong>Stake in company: </strong>13.3 percent <a href="http://www.cnbc.com/id/33608379?slide=13">Read more at CNBC. </a>

  • Proctor And Gamble

    <strong>Holding Value:</strong> $3.98 billion <strong>Shares:</strong> 59,602,203 <strong>Stake in company:</strong> 2.2 percent <a href="http://www.cnbc.com/id/33608379?slide=12">Read more at CNBC.</a>

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