3rd Cir.

In re: Quest Diagnostics ERISA Litigation

June 22, 2026 ·24-2866 ·Panel Decision ·Bibas · By Aisha Johnson

The Third Circuit affirmed summary judgment for Quest Diagnostics in an ERISA fiduciary duty case. The court held that the plan administrators followed a prudent process in maintaining investment options despite their underperformance.

Background

Employees of Quest Diagnostics sued the company and its investment committees, alleging that maintaining two specific investment funds in the company’s 401(k) plan violated their fiduciary duties under the Employee Retirement Income Security Act. The plaintiffs argued the funds underperformed and that the committee failed to remove them despite policy statements suggesting otherwise. The District Court granted summary judgment for Quest, finding the committee followed a prudent process.

The court’s reasoning

The court applied a two-step inquiry focusing on the fiduciary’s process. First, the court determined that Quest’s Investment Committee acted prudently by hiring outside advisors, meeting quarterly, reviewing data, and understanding the methodology behind investment decisions. The court emphasized that ERISA requires prudence, not perfection, and that fiduciaries need not remove funds solely due to short-term underperformance. Second, the court found that even if the plan’s policy statements were binding, they were permissive and did not mandate removal of the funds. The court rejected claims of failure to monitor and knowing breach of trust as dependent on a finding of breach of the duty of prudence.

ERISA is mostly concerned with process, not outcomes.

What it means going forward

The ruling reinforces that ERISA fiduciaries are judged on the reasonableness of their decision-making process rather than the investment results, protecting plan administrators from liability for market fluctuations or suboptimal fund performance if they follow sound procedures.