Coupang Hit by Massive Data Breach, CEO Resigns Amid Stock Decline
South Korean e-commerce giant Coupang (CPNG) has disclosed a major cybersecurity breach affecting 33.7 million customer accounts, prompting CEO Park Dae-joon’s resignation and a $1 billion compensation plan for impacted users. The incident has intensified scrutiny over the company’s security practices and leadership stability.
The breach coincides with a sharp 34.21% decline in Coupang’s share price over the past 90 days and a 12.37% drop year-to-date, though the company’s three-year total shareholder return remains positive at 24.73%. Coupang, which reported $33.66 billion in revenue and $390 million in net income, now faces investor uncertainty as its P/E ratio of 95.9x far above industry peers raises valuation concerns.
While a discounted cash flow (DCF) model suggests the stock may be 21.4% undervalued relative to its estimated future cash flow value of $26.07 per share, the breach and leadership shakeup could further pressure market sentiment. The company’s high valuation multiples, coupled with operational risks, leave its stock trajectory uncertain as it navigates the fallout.
Coupang cybersecurity rating report: https://www.rankiteo.com/company/coupang
"id": "COU1768995457",
"linkid": "coupang",
"type": "Breach",
"date": "1/2026",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': '33.7 million',
'industry': 'Retail',
'location': 'South Korea',
'name': 'Coupang',
'size': 'Large (revenue: $33.66 billion)',
'type': 'E-commerce'}],
'data_breach': {'number_of_records_exposed': '33.7 million'},
'description': 'South Korean e-commerce giant Coupang has disclosed a major '
'cybersecurity breach affecting 33.7 million customer '
'accounts, prompting CEO Park Dae-joon’s resignation and a $1 '
'billion compensation plan for impacted users.',
'impact': {'brand_reputation_impact': 'Intensified scrutiny over security '
'practices and leadership stability',
'data_compromised': '33.7 million customer accounts',
'financial_loss': '$1 billion (compensation plan)'},
'title': 'Coupang Massive Data Breach',
'type': 'Data Breach'}