Lincoln Retirement Plan Services Data Breach Under Investigation Shamis & Gentile P.A., a class action law firm specializing in data breach cases, is investigating a cybersecurity incident involving Lincoln Retirement Plan Services Company, LLC, a subsidiary of Lincoln Financial Group (part of Lincoln National Corp.). The company, based in Fort Wayne, Indiana, provides administrative services for employer-sponsored retirement plans, including 401(k) accounts. The breach, disclosed to the Massachusetts Attorney General on June 2, 2026, involved unauthorized access to sensitive personal data. While details remain limited, exposed information includes financial account details and Social Security numbers. Affected individuals may be eligible for compensation through a potential class action lawsuit. Lincoln Retirement Plan Services has not yet released further specifics on the breach’s scope or cause. The investigation is ongoing.