Some of the biggest mutual fund companies in the country disclosed personal information about their shareholders on the Securities and Exchange Commission Web site, The Wall Street Journal discovered.

The list of fund companies that made customer account numbers publicly available includes: Armada Funds, a unit of National City Corp.; Pimco, a unit of German insurance giant Allianz; the Dreyfus unit of Mellon Financial Corp.; Bank of America's Columbia Funds unit; Nuveen Investments; the First American Funds unit of U.S. Bancorp; AmSouth Bancorp's fund division; and the CNI Charter of City National Bank of Los Angeles.

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