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A Lululemon store in Austin, Texas, in June. Costco has denied allegations that it copied Lululemon’s Scuba hoodies and sweatshirts, Define jackets, and ABC pants.Brandon Bell/Getty Images

Costco Wholesale Corp. COST-Q is pushing back on claims that it infringed on Lululemon Athletica Inc.’s LULU-Q intellectual property when it sold alleged knockoffs.

In a recent filing made with a California court, Costco denies allegations that it copied Lululemon’s Scuba hoodies and sweatshirts, Define jackets and ABC pants.

Some of the alleged fakes Vancouver-based Lululemon identified were sold under Costco’s private label Kirkland, but others were made by manufacturers Danskin, Jockey and Spyder.

Lululemon sues Costco for allegedly selling clothing knock-offs

Lululemon’s lawsuit against Costco highlights the rise of fashion ‘dupes’

Costco says it acted in good faith at all times and feels Lululemon should not be entitled to any compensation.

Both sides have asked the court to hear the matter in a jury trial.

Their spat began in June when Lululemon said the alleged dupes Costco was selling take advantage of patents the athletic-wear brand holds, as well as the reputation and goodwill it has built with customers.

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Tickers mentioned in this story

Study and track financial data on any traded entity: click to open the full quote page. Data updated as of 06/03/26 4:00pm EST.

SymbolName% changeLast
LULU-Q
Lululemon Athletica
-1.76%170.13
COST-Q
Costco Wholesale
+1.58%998.1

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