Costco has filed a lawsuit in the U.S. Court of International Trade seeking to preserve its right to a refund of tariffs paid under President Donald Trump’s use of the International Emergency Economic Powers Act.

The warehouse club chain filed the complaint Nov. 28, joining dozens of other companies that have brought similar cases in recent weeks as the Supreme Court weighs the legality of Trump’s tariff program.

The lawsuit aims to ensure Costco remains eligible for refunds if the high court ultimately rules against the tariffs. The company said Customs and Border Protection denied its request to extend deadlines for finalizing tariff determinations, which could jeopardize its ability to seek full refunds later.

Costco did not specify in the filing how much it has paid in tariffs under

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