Costco Sued for Tariff Refunds as Shares Rally Over 16% on 90% Renewals
An Illinois Costco customer filed a class-action suit seeking a share of more than $130 billion in overturned Trump-era tariffs, joining over 2,000 companies in claims. US Customs must implement an electronic refund process within 45 days as Costco stock has gained just over 16% in 2026 on 90% membership renewal.
1. Class-Action Lawsuit Filed
An Illinois-based shopper filed a class-action lawsuit against Costco seeking refunds from overturned Trump-era tariffs. The suit joins over 2,000 companies claiming part of the more than $130 billion owed in illegally imposed import taxes.
2. Federal Tariff Refund Mechanism
US Customs is mandated to establish an electronic refund filing system within 45 days for importers to recover tariff payments. This process follows a federal ruling that invalidated key tariffs under the International Emergency Economic Powers Act.
3. Stock Performance and Membership Renewal
Costco shares have climbed just over 16% in 2026, supported by a 90% membership renewal rate that analysts view as a structural safety play. The strong renewal tailwind underscores consumer loyalty and provides predictable recurring revenue.