Ken Griffin’s IRS Data Leak Suit Should Be Tossed, US Says (1)

The US asked a judge to dismiss a lawsuit by hedge fund manager Ken Griffin against the Internal Revenue Service after the billionaire accused the agency of failing to protect his confidential financial information.

The Citadel founder seeks financial damages over a data breach that led to ProPublica’s publication of private data about some of the wealthiest US taxpayers. Griffin accused the IRS of failing to establish appropriate safeguards, saying on “information and belief” that unidentified IRS workers leaked his tax returns and return information to ProPublica between 2019 and March 2022.

In a filing Tuesday in Miami federal court, ...