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Berkshire Hathaway's 15 biggest stock holdings

US Gypsum (USG) dry wall board plant at Plaster City, near El Centro, Calif.

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14. USG (USG)

Holding Value: $1.07 billion
Shares: 39,002,016
Stake in company: 27.5 percent

Berkshire Hathaway increased its holdings of USG by 12 percent during the second quarter of 2014 by converting debt.

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