On April 17, 2025, the Supreme Court issued its opinion in Cunningham v. Cornell University, No. 23-1007, 604 U.S. ___ (2025), a case addressing the pleading standard for prohibited-transaction claims under § 406(a) of the Employee Retirement Income Security Act of 1974 (ERISA).  Section 406(a) proscribes certain transactions between plans and “parties in interest” absent a statutory exemption enumerated under ERISA § 408.  The core question on appeal was whether plaintiffs must allege, as an element of a prohibited-transaction claim under § 406(a), that an exemption under § 408 does not render the challenged transaction lawful.

In a decision that is expected to have wide-ranging implications, the Court held that exemptions under § 408 provide affirmative defenses to liability under § 406(a).  Consequently, plaintiffs need not allege that any of the exemptions set forth in § 408 are unavailable to state a plausible claim for relief.  Rather, the burden falls on plan fiduciary defendants to plead and prove that an exemption under § 408 nullifies a plaintiff’s claim.

The Court recognized that its decision in Cunningham could make it more difficult for defendants to secure the dismissal of prohibited-transaction claims by invoking a statutory exemption.  If so, plan sponsors (and other fiduciaries) could be forced to engage in costly discovery defending transactions that ERISA expressly permits, effectively penalizing them for providing valuable and necessary services to participants.

Provided below is a more detailed discussion of Cunningham, divided into three parts.  The first part briefly discusses the legal framework governing prohibited-transaction claims.  The second part summarizes the Court’s analysis.  The third part concludes with an overview of potential mitigation strategies.