A trust indirectly owned by John M. Duffey, president and CEO of amusement-parks operator Six Flags ticker: Duffey now ownsSix Flags shares directly WSJ WSJ LIVE WSJ Live on Facebook.

MORE Mansion Global WSJ Secure BigCharts Financial News Professor Journal Realtor. Home Magazine This Week's Edition Past Editions New: Duffey bought 25, more shares.

A fund giant also increased its stake.

Stock Market Data - Dow Jones, Nasdaq, S&P - CNNMoney

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