Coupang users are preparing to sue the Seattle-based e-commerce giant following a recent data breach that impacted more than 30 million people.

SJKP, the U.S. branch of Daeryun Law Firm, said in a press conference in Manhattan on Sunday, local time, that it would bring a class-action suit on behalf of affected plaintiffs who are seeking unspecified punitive damages.

In the wake of complaints already filed in South Korea, the law firm told Yonhap News that it will pursue litigation in both countries simultaneously.

On November 29, Coupang disclosed that personal information for approximately 33-point-seven million of its customers had been compromised, including names, email addresses, phone numbers and delivery details.

The U.S.-listed parent company, Coupang Inc., owns 100 percent of the platform's South Korean corporation, and founder Bom Kim holds more than 70 percent of Coupang Inc.'s voting rights.