Ken Griffin Sues IRS Over Tax Privacy Breach That Also Affected Other Billionaires

WASHINGTON—Billionaire hedge-fund manager Ken Griffin sued the Internal Revenue Service and Treasury Department on Tuesday, seeking damages after disclosure of his tax records. 

Tax data about wealthy people such as Elon Musk and Jeff Bezos were published by the news organization ProPublica starting in June 2021, in an unusual breach of the confidentiality of tax returns. The news site published articles mentioning Mr. Griffin and using information from his tax records in April and July this year.