Mark G. Boyko

Mark Boyko practices primarily in the area of complex fiduciary breach and prohibited transaction litigation, representing clients in actions brought under the Employee Retirement Income Security Act of 1974 (ERISA). He has secured judgments and settlements in this area exceeding $500 million and handled successful appeals in federal circuit courts as well as the US Supreme Court.

Mark is a pioneer in ERISA class action litigation, representing workers and retirees in many of the earliest cases in his field. In these matters, Mark represents 401(k) plan participants alleging breach of fiduciary duties in order to hold employers and Wall Street accountable for the plans’ investments and fees.

His practice also includes numerous private company ESOP cases in which he represents workers claiming that fiduciary trustees caused their employee stock ownership plans (ESOPs) to overpay corporate insiders for private company stock. Additionally, Mark represents pension plan participants in cases alleging that plans using decades-old mortality tables have unfairly reduced monthly benefits for married retirees.

Mark also handles matters related to the denial of long-term disability benefits for people impacted by COVID-19, including individuals who are immunocompromised or have other issues that impact their ability to be in-person at workplaces, or who have long-haul COVID.

Mark's practice additionally includes providing legal and strategic services to founders, startups, and small businesses from pre-conception through Series-A funding.

Awards & Accolades

Chambers USA, Nationwide Department Ranking - ERISA Litigation: Mainly Plaintiffs (2023)

Super Lawyers Rising Star, Missouri, Class Action/Mass Torts, Employee Benefits, Business/Corporate, Personal Injury - General (2012-2020)