Mossack Fonseca was a law firm in Panama City. Between 1977 and 2018, it built 214,000 shell companies for clients in more than 200 countries.

Its client list included twelve current or former heads of state, sixty-one of their relatives, one hundred and twenty-eight other public officials, twenty-nine billionaires, at least thirty-three people or companies on international sanctions lists, and King Salman of Saudi Arabia.

In 2016, eleven and a half million of the firm's internal documents were leaked to a German newspaper. Nearly four hundred journalists in eighty countries spent a year reading them. The reporting was published as the Panama Papers, the largest journalistic collaboration in history.

Two prime ministers lost their jobs.

In June 2024, every single defendant in the Panama Papers trial was acquitted. All twenty-eight of them, including the firm's surviving founder.

And Daphne Caruana Galizia, the Maltese journalist who kept investigating the firm's clients in her own country after everyone else had moved on, was killed by a car bomb outside her home in October 2017.

Here is the full file.

What Mossack Fonseca actually sold

The firm was not a criminal organization. This is the part people get wrong, and getting it wrong is what keeps the whole system invisible.

It was a law firm. It sold a legal product, openly, to clients who paid legal fees, through a network of banks, accountants, and intermediaries in the world's most respectable financial centers.

The product was distance.

A shell company is a corporate entity with no employees, no offices, and no operations. Its only function is to own things. When a shell owns an asset, that asset legally belongs to the company, not to the person controlling the company. If the shell is registered in a jurisdiction that does not publish beneficial ownership, the link between the person and the asset does not exist in any public record anywhere on earth.

Stack a second company on top of the first, in a different jurisdiction, and the distance doubles. Add a foundation or a trust as the shareholder, and following the trail now requires court orders in three countries.

Mossack Fonseca built these structures the way an architect builds houses. Standard components, assembled to order, at scale, for a fee. 214,000 times.

The firm's public defense, stated repeatedly by co-founder Ramón Fonseca, was that it had no control over what clients did with the vehicles it created for them. A car manufacturer is not responsible for the getaway driver.

That argument has a strange property. It is both entirely reasonable and the exact reason the system works.

Who was actually in the files

The 2016 leak did something that had never happened before. It made the client list public. Not an estimate, not an inference. The actual names, attached to the actual entities, in the firm's own internal correspondence spanning four decades.

Sigmundur Davíð Gunnlaugsson, the Prime Minister of Iceland, had held an offshore company holding claims against the very Icelandic banks his government was negotiating with after their collapse. He was asked about it in an interview, walked out, and resigned within days as thousands protested outside parliament.

Nawaz Sharif, the Prime Minister of Pakistan, was disqualified from office by his country's Supreme Court after the investigation that followed.

Spain's Minister of Industry resigned. The late father of the British Prime Minister was revealed to have run an offshore fund. Associates of Vladimir Putin, the brother-in-law of Xi Jinping, the President of Ukraine, the President of Argentina, and the King of Saudi Arabia all appeared in the documents.

Understand what the leak actually proved. Not that a handful of politicians were corrupt. That offshore structuring is the default financial architecture of the global political class. These were not outliers who had discovered a loophole. They were ordinary customers of an ordinary firm buying an ordinary product.

Daphne Caruana Galizia

Malta is the smallest member state of the European Union, with fewer than half a million people. It appeared repeatedly in the Panama Papers.

Daphne Caruana Galizia was a Maltese investigative journalist who had spent years documenting the links between her country's political class and the offshore world. When the Panama Papers were published, she did not treat them as a finished story. She treated them as a starting point.

She reported that senior figures in the Maltese government held Panama structures created by Mossack Fonseca. Then she went further and identified a company in Dubai called 17 Black, which she reported was connected to Maltese politicians. She wrote about it eight months before her death, without being able to prove who owned it.

A later investigation established that 17 Black was owned by Yorgen Fenech, one of Malta's wealthiest businessmen and a director of the national power company.

On the sixteenth of October 2017, Daphne Caruana Galizia left her home in Bidnija and got into her car. A remotely detonated bomb killed her.

Her final post, published shortly before she died, said there were crooks everywhere she looked, and that the situation was desperate.

A public inquiry running to 437 pages later concluded that the Maltese state bore responsibility for her assassination, finding that the government had created what the report called an atmosphere of impunity, in which her killers could reasonably expect minimal consequences.

Two brothers are serving forty years for planting and detonating the bomb. A third man is serving fifteen. Two more were sentenced to life in June 2025 for procuring and supplying the military-grade explosive.

Yorgen Fenech, charged with masterminding the killing, denies all involvement. His trial opened in Valletta in July 2026, nearly nine years after her death. It is happening right now.

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What happened to the men who built it

Now compare that to the people who built the machine.

Mossack Fonseca's offices were raided in 2016. Jürgen Mossack and Ramón Fonseca were arrested and jailed in February 2017. They were released on bail two months later after each paying five hundred thousand dollars. The firm closed in 2018, citing reputational damage.

In June 2022, Mossack, Fonseca, and thirty-seven other people were acquitted in a separate money laundering case.

Then came the main trial. It ran for eighty-five hours in April 2024, eight years almost to the day after the Panama Papers were published. Three prosecutors faced eighteen defense lawyers. The prosecution asked for twelve years, the maximum sentence for money laundering.

On the twenty-ninth of June 2024, Judge Baloisa Marquínez acquitted all twenty-eight defendants.

The reason was not that the conduct was found lawful. The reason was procedural. The judge ruled that evidence taken from the firm's servers during the 2016 raid had not been collected in accordance with chain-of-custody rules, which raised doubts about its authenticity and integrity.

Eleven and a half million documents. Four hundred journalists. Eight years of litigation. And the case collapsed on how the hard drives were handled on the day of the raid.

Ramón Fonseca died in a Panamanian hospital in May 2024, one month before the verdict that would have cleared him. The action against him was dismissed.

Jürgen Mossack walked out of court a free man.

What this means for your money

Three conclusions, and they land in a specific order.

The leak worked, and it changed almost nothing. This is the hardest fact in the story. The Panama Papers were an unqualified journalistic success. The documents were real, the reporting was accurate, the names were correct, and it was published in eighty countries at once. A prime minister fell. Another was disqualified. And then the offshore industry continued, in Panama and everywhere else, because almost nothing revealed had actually been illegal in most jurisdictions. Exposure is not the same as consequence. A system that is legal cannot be dismantled by proving that it exists.

Procedure protects the powerful more reliably than any conspiracy could. Nobody had to bribe the judge in Panama. Nobody had to intimidate the prosecution. The case died because evidence handling in a 2016 raid did not meet a standard, and eight years later a court applied that standard correctly. Chain-of-custody rules exist for good reasons and protect innocent people. They also mean a case built on eleven million documents can end without any court ever ruling on what those documents said. When financial cases fail, look at the process, not the plot. The process is where outcomes are actually decided, and people who can afford eighteen lawyers understand this better than anyone alive.

The cost of this system is not distributed evenly, and it is not primarily financial. The wealthy clients paid legal fees. The firm paid legal costs and closed. The politicians who fell, fell politically. Almost nobody paid a price that could not be measured in money or in office. One person paid a different kind of price entirely, and she was a journalist in the smallest country in the European Union who would not stop investigating. That asymmetry is the most honest summary of the offshore system that exists. Everyone inside the machine can settle. The person trying to see inside it cannot.

One number to leave you with

214,000. The shell companies built by one law firm in Panama.

0. The convictions in the Panama Papers trial.

Twelve heads of state, sixty-one of their relatives, one hundred and twenty-eight public officials, and a king had their offshore structures made public. The case against the firm that built those structures ended in a full acquittal, on a question of how hard drives were handled during a raid.

The only life sentence connected to any of it was served by a journalist, and it was not handed down by a court.

That is not a conspiracy theory. That is the verdict.

The full anatomy of this system, from where money is created to where the winnings finally hide, is in the book. Dark Money: How Wealth, Power, and Intelligence Really Work.

The Dark Money Letter is published every Wednesday. thedarkmoneyletter.com

Sources

  • ICIJ, the Panama Papers investigation (2016) and subsequent coverage

  • Süddeutsche Zeitung, original recipient of the 11.5 million document leak

  • ICIJ, "Panama Papers trial concludes with all defendants acquitted of money laundering," July 2024

  • Panama City court ruling, Judge Baloisa Marquínez, 29 June 2024

  • Malta public inquiry into the assassination of Daphne Caruana Galizia, 437-page report (2021)

  • ICIJ, coverage of the Yorgen Fenech trial, July 2026

  • Reuters investigation identifying the ownership of 17 Black