Greenoaks and Altimeter file U.S.-Korea FTA arbitration over breach exposing 33M customers
Greenoaks and Altimeter filed U.S.-Korea Free Trade Agreement arbitration and petitioned the U.S. Trade Representative to impose tariffs on South Korea over alleged discriminatory regulatory actions after Coupang’s breach exposed 33 million customers’ personal data. Coupang is offering vouchers up to 55,000 won per person and faces a U.S. class action.
1. US Investors File Arbitration Claims Against South Korea
In late January, Greenoaks and Altimeter formally served notice of intent to initiate arbitration under the U.S.-Korea Free Trade Agreement, accusing the Republic of Korea of launching a targeted, multiagency campaign against Coupang. The investors allege that between November 2025 and January 2026, South Korean regulators conducted more than 200 audits, inspections and on-site investigations—far exceeding scrutiny applied to domestic and Chinese e-commerce firms—resulting in administrative penalties totaling KRW 120 billion. Greenoaks and Altimeter maintain these actions violate non-discrimination provisions of the FTA and have threatened to seek damages corresponding to investors’ lost market value, estimated at over USD 3.5 billion since the breach disclosure.
2. Data Breach Impact and Customer Compensation
Coupang announced in November that a breach compromised personal data for more than 33 million South Korean customers, including names, contact information, shipping addresses and partial order histories; no financial or login credentials were exposed. To address reputational damage and regulatory pressure, Coupang offered vouchers worth up to KRW 55,000 to each affected customer—an aggregate commitment of approximately KRW 1.8 trillion. Management estimates this compensation program will reduce fourth-quarter operating margins by 1.2 percentage points and increase net restructuring charges by KRW 250 billion.
3. U.S. Trade Representative Petition and Potential Remedies
On January 22, the investors petitioned the Office of the U.S. Trade Representative under Section 301 of the Trade Act of 1974, requesting an investigation into alleged discriminatory conduct by South Korea’s Trade Ministry, National Tax Service and Fair Trade Commission. The petition calls for ‘‘appropriate trade remedies, potentially including tariffs and other sanctions,’’ should USTR find the ROK in breach of its trade obligations. Market participants note that any U.S. sanctions could further strain bilateral semiconductor and automotive supply chains valued at over USD 100 billion annually.
4. Investor Class Action and Broader Market Implications
Separately, Coupang faces a consolidated U.S. securities class action alleging the company misled investors by delaying disclosure of the breach and overstating security controls. Plaintiffs seek unspecified damages for losses linked to a 25% drop in Coupang’s ADR volume in the weeks following the breach announcement. Analysts warn that prolonged legal battles, regulatory fines and potential trade sanctions could depress Coupang’s valuation multiples relative to regional peers, such as JD.com and Rakuten, by up to 15% over the next two quarters.