Link: https://www.occrp.org/en/troikalaundromat/
I chose the project The Troika Laundromat, from the Organized Crime and Corruption Reporting Project (OCCRP) and its reporting partners. They won this year's edition (2020) of the Sigma Data Journalism Awards.
The Troika Laundromat is about a collection of 70 offshore shell companies whose controllers used them to move billions of dollars of private wealth from Russia to the west.
The datasets for this investigation is a large banking data leak that contains hundreds of bank account records. “Many with tens of thousands of transactions, form the core of the leak. All together, the transaction record exceeds 1.3 million transactions and $ 470 billion, writes the OCCRP on its website.
The OCCRP addressed the data leak, originated from several sources, and used existing data from its own database.
Through analysis and treatment of data on bank information and a lot of research work, OCCRP and its partners discovered who are the people behind the banking transactions (1.3 million leaked transactions from 238,000 companies).
Aleph, the global archive of research material for investigative reporting from OCCRP, was instrumental in processing document information.