July 22, 2026 A $14M Costco settlement offers cash to Washington consumers who received promotional emails with allegedly false or misleading subject lines.
July 9, 2026 A class action lawsuit claims that Costco has failed to disclose the presence of lead, cadmium and arsenic in Orgain Organic Protein Powder.
March 24, 2026 A class action lawsuit filed after a Feb. 2026 Supreme Court ruling alleges that Costco passed the costs of illegal tariffs under IEEPA to consumers.
February 13, 2026 A class action claims Costco's Kirkland rotisserie chicken supply suffers from chronic salmonella contamination issues due to poor, unsanitary conditions.
January 27, 2026 A class action lawsuit alleges that Costco has falsely claimed that its rotisserie chickens contain no preservatives.
November 13, 2025 A class action lawsuit claims that Costco’s Kirkland Signature tequila is not made from 100 percent Blue Weber agave as advertised.
May 1, 2025 A class action alleges Costco illegally sells iPhones in Washington without providing certain repair and warranty disclosures about the products.
November 20, 2024 Costco Wholesale Corporation faces a class action lawsuit that claims its Kirkland Signature fish oil products do not support heart health as advertised.
June 24, 2024 A Costco lawsuit alleges fragrance-free Kirkland Signature Baby Wipes are unfit for their intended use since they contain unsafe levels of forever chemicals.
June 19, 2024 A class action lawsuit alleges Costco fails to disclose that consumers will pay more for an item sold on Costco.com than if they bought the same item in-store.
November 1, 2023 A class action alleges Costco’s cranberry juice products are not as preservative-free as advertised since they contain the commonly used additive ascorbic acid.
October 24, 2023 A class and collective action alleges Costco Wholesale Corporation has unlawfully deprived junior managers of overtime wages by misclassifying them as exempt employees.
October 11, 2023 Costco faces a class action over its alleged use of a Meta Pixel to secretly disclose the private health information of millions of pharmacy customers to third parties.
December 8, 2022 A proposed class action lawsuit alleges Costco Wholesale Corporation has misleadingly labeled its Kirkland Signature Ultra Clean detergent.
October 3, 2022 A class action alleges Innofoods “keto” snacks are falsely advertised in that the sugar-laden, high-carb products are not appropriate for a ketogenic diet.
September 15, 2022 Three cases claim Costco, Amazon and Samsung have violated several provisions of the federal Magnuson-Moss Warranty Act.
August 2, 2022 A class action alleges Costco’s Kirkland Signature White Albacore Tuna in Water is not “dolphin safe” as advertised.
March 23, 2022 A class action alleges Costco has failed to disclose that its Kirkland Organic Roasted Seaweed snack may contain cadmium, perchlorate or other toxins.
October 11, 2021 Costco faces a class action that alleges its Kirkland Signature Himalayan pink salt is mislabeled in that it is sourced not from “the heart of the Himalayan Mountains” in India, but from Pakistan.
September 8, 2021 Black raspberry-flavored Kirkland Signature sparkling water is misleadingly labeled in that buyers are given a false impression of the amount/quantity/type of flavoring in the product, a class action claims.
July 19, 2021 A lawsuit claims buyers of Kirkland Signature “Chocolate Almond Dipped Vanilla” ice cream bars are not told that the dessert’s coating is made of mostly vegetable oils.
June 10, 2021 Costco has repeatedly failed to provide participants in and beneficiaries of its healthcare plan with lawful COBRA notices upon a “qualifying event,” a class action claims.
May 10, 2021 A proposed class action alleges the “free” battery replacement warranty sold by Costco for Interstate-branded car batteries does not work as consumers believe it will.
January 12, 2021 Charleston, South Carolina's public works commissioners have sued a number of retailers for their sale of "flushable" wipes alleged to have caused extensive damage to sewer and septic systems.
September 22, 2020 A class action claims Costco misled consumers into believing its Optifiber Natural Prebiotic Supplement is “natural” even though it contains a synthetic ingredient.
September 10, 2020 Local Puerto Rican businesses allege Walmart, Costco, Walgreens and CVS Pharmacy sold non-essential goods amid the commonwealth's COVID-19 state of emergency.
April 23, 2020 Ten consumers allege a stable of nearly 30 grocers, producers and wholesalers have gouged the prices of eggs during the COVID-19 crisis.
September 17, 2019 A class action claims Costco bears responsibility for selling Monsanto's Roundup without adequate warnings as to the cancer risk associated with use of the product.
March 6, 2019 A proposed class action has been filed in Washington on behalf of consumers who purchased “ordinary commodity coffee” that was allegedly deceptively labeled as authentic Kona coffee.
November 7, 2018 A Costco common stockholder alleges the retailer and its CEO and CFO deceived shareholders into purchasing securities at artificially inflated prices.
May 18, 2018 A California woman claims in a proposed class action lawsuit that Costco’s Kirkland Signature branded dish soap and laundry detergent are not 'environmentally responsible' despite their labels’ claims.
March 2, 2018 A consumer alleges the amounts of omega fatty acids in Kirkland-brand Wild Alaskan Fish Oil products is misrepresented on bottle labels.
