Panama Papers: The Basics

Leak: Largest leak in offshore history, by anonymous source: 11.5 million records, accounting for 2.6 terabytes of data, from Panamanian law firm of Mossack Fonseca dating from 1977 to December 2015

Data: Contains details on more than 214,000 offshore entities connected to people in more than 200 countries, territories

Who: Owners of offshore companies include 140 politicians, including 12 current and former political leaders; billionaires; sports stars; drug smugglers; mafia members; also at least 33 people and companies blacklisted by the U.S. government because of evidence of their involvement in wrongdoing, such as doing business with Mexican drug lords or with rogue nations such as North Korea and Iran

Banks: More than 500 banks, their subsidiaries and branches — including HSBC, UBS and Société Générale — created more than 15,000 offshore companies for their customers through Mossack Fonseca