Dozens of journalists sifted through millions of leaked records and thousands of names to produce ICIJ’s investigation into offshore secrecy ­

A cache of 2.5 million files has cracked open the secrets of more than 120,000 offshore companies and trusts, exposing hidden dealings of politicians, con men and the mega-rich the world over. The secret records obtained by the International Consortium of Investigative Journalists lay bare the names behind covert companies and private trusts in the British Virgin Islands, the Cook Islands and other offshore hideaways.

They include American doctors and dentists and middle-class Greek villagers as well as families and associates of long-time despots, Wall Street swindlers, Eastern European and Indonesian billionaires, Russian corporate executives, international arms dealers and a sham-director-fronted company that the European Union has labeled as a cog in Iran’s nuclear-development program.

The leaked files provide facts and figures — cash transfers, incorporation dates, links between companies and individuals — that illustrate how offshore financial secrecy has spread aggressively around the globe, allowing the wealthy and the well-connected to dodge taxes and fueling corruption and economic woes in rich and poor nations alike.

The records detail the offshore holdings of people and companies in more than 170 countries and territories.

Here’s how offshore accounts hide financial assets:

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