Illumina (NASDAQ:ILMN) investor Carl Icahn has reportedly filed a lawsuit in opposition to the corporate’s former CEO Francis de Souza and sure members of its board.

A number of Icahn firms filed the lawsuit beneath seal in a Delaware courtroom on Tuesday. Particulars of the lawsuit weren’t instantly accessible, according to Bloomberg.

On Friday, EU regulators ordered Illumina to divest Grail, a most cancers detection check firm it acquired for round $7B in 2021.

EU and US regulators have been pushing for an unwinding of the acquisition, which was accomplished with out regulatory approval.