Stanford Financial Group, a firm run by wealthy financier R. Allen Stanford that says it manages $51 billion, is being examined by the Securities and Exchange Commission and two other regulatory agencies, according to the firm.

Regulators from the SEC, the Financial Industry Regulatory Authority and the Florida Office of Financial Regulation visited six branch offices of Stanford Financial's broker-dealer firms last month. The examination has been going on for at least several months, according to a person familiar with the matter. The visit by regulators was previously reported by Business Week.