A lawsuit on behalf of former DuPont employees saying their retirement benefits are in jeopardy because of the company’s merger with Dow Chemical has been filed in federal court.

The putative class action, Thondukolam v. Corteva Inc., was filed in the U.S. District Court for the Northern District of California on July 3, on behalf of more than 100,000 people, including retirees and beneficiaries in the pension plan.