Justices Back IAM Pension Fund In Withdrawal Liability Battle

By Kellie Mejdrich · May 21, 2026, 10:13 AM EDT

The U.S. Supreme Court ruled Thursday that multiemployer pension plan actuaries can retroactively change assumptions underlying their withdrawal liability calculations, rejecting employers' argument for time restrictions on the methodology underpinning penalties...

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Case Information

Case Title

M & K Employee Solutions, LLC, et al., Petitioners v. Trustees of the IAM National Pension Fund

Case Number

23-1209

Court

Supreme Court

Nature of Suit

3791 Employee Retirement

Date Filed

May 13, 2024