On May 21, 2026, the Supreme Court handed down a unanimous opinion in M & K Employee Solutions v. Trustees of the IAM National Pension Fund, and if you’re an employer who’s ever thought about walking away from an underfunded multiemployer pension plan, you should be paying attention.
The question was deceptively simple: when
On June 30, 2025, the Supreme Court granted certiorari in M&K Employee Solutions, LLC et al. v. Trustees of the IAM Nat’l Pension Fund to address whether the requirement under ERISA section 4211 that multiemployer pension plans compute withdrawal liability based on the plan’s unfunded vested benefits “as of the end” of the plan year