South Korea has imposed a record fine of 625 billion won, ($409 million) on e-commerce giant Coupang over what authorities describe as the country’s largest-ever data breach.The penalty, announced by the Personal Information Protection Commission (PIPC), is the biggest fine ever issued for a privacy violation in the country.The decision follows an extensive investigation into a breach that reportedly exposed the personal information of more than 33 million customers, nearly two-thirds of South Korea’s population.According to regulators, Coupang failed to identify the breach quickly and did not report it within the legally required time frame.Key Highlights South Korea Fines Coupang $409M Over Massive Data Leak Coupang Hit With Record Fine in South Korea Data Breach South Korea Slaps Coupang With Record Privacy FineAuthorities said the incident was linked to weak internal security measures rather than a highly sophisticated cyberattack. Investigators found that a former employee allegedly used company credentials to gain unauthorized access to sensitive customer data.Officials also claimed that cybersecurity failures were not properly addressed after the employee left the company, leaving vulnerabilities unaddressed.Regulators further accused Coupang of improperly collecting customer information through a marketing programme. Authorities alleged that nearly 11 million users had parts of their online activity monitored without clear consent, leading to additional penalties as part of the ruling.Coupang Apologises, Considers Legal ResponseIn response to the fine, Coupang apologised to customers and acknowledged concerns over the breach. However, the company said regulators had not fully considered the efforts it made to reduce customer harm after the incident came to light.The company stated that it plans to carefully review the final decision and may pursue legal options once the official documents are received. Coupang also stressed that it had strengthened security measures since the breach and remained committed to protecting customer information.Often compared to Amazon due to its dominance in online retail and fast delivery services, Coupang is one of South Korea’s largest e-commerce companies. While the company is listed in the United States, most of its business comes from South Korea, where it provides services ranging from grocery delivery and food ordering to digital commerce.The fine is estimated to equal around 1.4 percent of Coupang’s annual revenue in 2025. Under South Korean law, companies can face penalties of up to 3 percent of annual revenue if they fail to maintain adequate protections for personal information.The case has reignited concerns over data privacy, consumer protection, and cybersecurity among major technology firms in South Korea. Experts say the scale of the breach could lead regulators to introduce stricter enforcement measures and stronger oversight for companies handling large amounts of customer data.Some analysts have also suggested that the case may attract international attention because Coupang is listed on the U.S. stock market and has global investors. However, South Korean officials have emphasized that the investigation is focused solely on privacy compliance and consumer protection.Also Read: Japan Plans New Defense Agency to Expand Military ExportsThe record penalty sends a strong message to large digital platforms operating in the country: companies handling customer data will face serious consequences if they fail to protect personal information or respond quickly to security risks.