Just to throw a bit more Light on the subject of the Paradise Papers. The data was provided to the International Consortium of Investigative Journalists (ICIJ) as anon stated above. The leak was never provided to the general public. Interestingly, while there were many stories about Europeans, Africans, etc. in the news at the time there were very few stories related to Americans.
One of the major donors to ICIJ is the Open Society Foundation (Soros https:// www.opensocietyfoundations.org/people/george-soros). The other donors are available here: https:// www.icij.org/about/our-supporters/