Tibble v. Edison Int'l
The Court ruled that a lower court was wrong to throw out part of a lawsuit over a company's 401(k) plan just because the disputed investment funds had been added more than six years earlier, since retirement plan managers have an ongoing duty to keep reviewing their fund choices, not just to pick them wisely at the start.
The decision means workers can sue over investments added long ago if the plan manager failed to monitor and remove bad ones within the past six years, giving employees a broader window to challenge costly retirement-plan fees.
How it got here: A federal trial court ruled some claims were too late and the Ninth Circuit agreed; the workers asked the Supreme Court to review that timeliness ruling.
The Case in Depth
What happened
Workers who put money into Edison International's 401(k) retirement plan sued the company and other plan managers, claiming they mismanaged the plan by offering six mutual funds at a more expensive "retail" price when nearly identical, cheaper "institutional" versions of the same funds were available to a large investor like the plan.
The question before the Court
If a retirement plan added risky investment options more than six years ago, can workers still sue over them today by pointing to a manager's ongoing duty to check on old investments?
Why it matters
Millions of workers with 401(k) plans depend on their employers to pick and keep good investment options. This ruling means plan managers cannot escape liability for high-fee or underperforming funds just by pointing to when the fund was first added — they must keep checking on investments year after year, or face lawsuits over recent failures to do so.
What changes now
The case goes back to the Ninth Circuit, which must now examine the workers' claims under the correct legal framework — asking whether the plan managers breached their ongoing duty to monitor and remove imprudent investments within the six years before the lawsuit was filed. The Supreme Court did not decide whether the managers actually violated that duty, leaving that question, and any related procedural disputes, for the lower court to resolve.
What this does not decide
The Court did not decide whether the plan managers actually acted imprudently or breached any duty regarding the disputed mutual funds, nor what kind of review a manager must conduct. It only clarified that a continuing duty to monitor exists and can make a claim timely; the merits are left for the Ninth Circuit.
How the Court got there
The legal reasoning, step by step
- The Court looked to the law of trusts, since a retirement-plan manager's legal duties under the federal pension law (ERISA) come from long-standing trust law principles governing how someone managing another person's money must act.
- Under trust law, a manager's duty of prudence is not limited to the moment an investment is first chosen; the manager also has a separate, continuing duty to keep reviewing investments over time and to get rid of ones that are no longer sensible choices.
- Because this continuing duty exists apart from the original selection decision, a lawsuit claiming the manager failed to monitor and remove a bad investment is timely as long as that failure to monitor happened within the six-year filing window, even if the investment itself was chosen decades earlier.
- The lower appeals court had only asked whether the initial decision to add the funds happened within six years, and required proof of a 'significant change in circumstances' before finding any later breach — without first considering whether a separate, ongoing duty to monitor applied.
- Because the appeals court skipped over this continuing-duty question, its conclusion that the claims were time-barred could not stand as written.
Doctrinal impact
Cases affected by this decision
Reaffirms Central States, Southeast & Southwest Areas Pension Fund v. Central Transport, Inc. (472 U.S. 559)
Reaffirmed that ERISA fiduciary duties are derived from the common law of trusts.