Coupang Stock Plunge 3.71% to 2025 Low Amid Lawsuits Data Breach Fallout

The share price fell to its lowest level since April 2025 today, with an intraday decline of 3.71%.

Coupang’s stock slump follows a series of legal and operational setbacks, including a massive data breach affecting 33.7 million customers and subsequent securities class action lawsuits. The breach, attributed to unauthorized access by a former employee, exposed significant cybersecurity vulnerabilities. Two lawsuits, led by Hagens Berman and Berger Montague, allege the company delayed disclosing the breach until November 30, 2025, violating regulatory standards. The suits further accuse Coupang of misleading investors about its cybersecurity protocols during the Class Period (August 6–December 16, 2025).

Regulatory and legal scrutiny has intensified, with potential penalties and litigation costs weighing on investor sentiment. The lawsuits highlight risks of reputational damage and operational strain, as Coupang faces heightened compliance demands across jurisdictions. While the company has apologized and enhanced cybersecurity measures, critics argue these steps were reactive rather than proactive. A lead plaintiff deadline of February 17, 2026, underscores the urgency for affected investors to act. The stock’s decline reflects broader concerns over corporate governance and risk management, as Coupang navigates a competitive market amid growing scrutiny.