Billionaire George Soros, who has spent millions of dollars financing Democrats and left-wing causes, used a controversial Panamanian law firm to establish a web of offshore investment partnerships that operate around the world and out of the scrutiny of U.S. regulators, according to leaked documents.

The so-called Panama Papers, a trove of 11.5 million financial documents tracing the Mossack Fonseca law firm’s efforts to help politicians, celebrities and criminals shield their money from taxes, contain links to Soros, who funds the journalism group that is disseminating the information. So far, the International Consortium of Investigative Journalists (ICIJ) has been silent on its benefactor’s ties to the law firm.

Three offshore investment vehicles controlled by Soros are catalogued in the Panama Papers. Soros Finance, Inc. was incorporated in Panama; Soros Holdings Limited was set up in the British Virgin Islands and a limited partnership called Soros Capital was created in Bermuda.

The laws of Panama, Bermuda, the British Virgin Islands and a score of “tax havens” allow foreign firms to hide ownership of cash, real estate and other assets from securities regulators and tax collectors in the countries where they are physically headquartered.