The Securities and Exchange Commission, which recently levied millions of dollars in fines against major corporations that lost data to cyber thieves, has been similarly victimized by an international insider trading ring.

The SEC said it filed civil charges against defendants, including people in California, Korea, Russia and Ukraine and two companies in Hong Kong and Belize, for allegedly hacking into the SEC’s EDGAR corporate filing database from May to at least October 2016 and trading securities on the stolen data.