Hagens Berman Alerts Coupang Investors to Deadline in Securities Class Action Over Data Breach

Lawsuit alleges Coupang failed to detect massive data breach for nearly 6 months, leading to $1.2 billion compensation plan and CEO resignation

Feb. 5, 2026 at 4:31pm by Ben Kaplan

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Hagens Berman, a national shareholder rights firm, is reminding investors in Coupang, Inc. (NYSE: CPNG) about the February 17, 2026 lead plaintiff deadline in a securities class action lawsuit. The lawsuit alleges that Coupang misled investors by touting its cybersecurity while failing to detect a data breach that impacted 33.7 million customer accounts for nearly six months. The breach, allegedly carried out by a former employee, has led to a $1.2 billion compensation plan and the resignation of Coupang's CEO.

Why it matters

The Coupang data breach case highlights the growing importance of robust cybersecurity protocols and timely disclosure of security incidents, especially for public companies. The alleged failures in Coupang's internal controls and delayed notification to regulators and the public have resulted in significant financial and reputational damage, underscoring the need for greater accountability around data protection.

The details

The lawsuit alleges that Coupang maintained inadequate protocols that allowed a former employee to retain access to sensitive customer information for months, despite the company's assurances of "threat visibility." Coupang reportedly became aware of the breach on November 18, 2025, but did not disclose it to the public until 11 days later. The breach has led to a $1.2 billion compensation plan and the resignation of Coupang's CEO, Park Dae-joon, as well as investigations by Korean regulators.

  • Coupang became aware of the data breach on November 18, 2025.
  • Coupang publicly disclosed the data breach on November 29, 2025.
  • The lead plaintiff deadline in the securities class action lawsuit is February 17, 2026.

The players

Coupang, Inc.

A South Korean e-commerce company that operates in several countries, including the United States.

Park Dae-joon

The former CEO of Coupang, who resigned in the aftermath of the data breach.

Hagens Berman

A national shareholder rights firm that is leading the investigation and securities class action lawsuit against Coupang.

Reed Kathrein

A partner at Hagens Berman who is leading the firm's investigation into the Coupang data breach case.

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What they’re saying

“We are investigating why it allegedly took Coupang nearly six months to detect that a former employee had access to 33 million customer accounts.”

— Reed Kathrein, Partner, Hagens Berman (PRNewswire)

What’s next

The lead plaintiff deadline in the securities class action lawsuit against Coupang is February 17, 2026. Investors who purchased Coupang (CPNG) securities between May 7, 2025, and December 16, 2025, and suffered significant losses are encouraged to contact Hagens Berman to learn more about the case and their options.

The takeaway

The Coupang data breach case highlights the importance of robust cybersecurity protocols and timely disclosure of security incidents, especially for public companies. The alleged failures in Coupang's internal controls and delayed notification to regulators and the public have resulted in significant financial and reputational damage, underscoring the need for greater accountability around data protection.