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A securities class action lawsuit has been filed against ODDITY Tech. Ltd. (ODD), seeking to represent investors who purchased ODDITY securities between February 26, 2025 and February 24, 2026.
The filing follows a 49% decline in the price of ODDITY American Depositary Shares on February 25, 2026. The selloff wiped out more than $600 million in market capitalization after the company announced it expects a 30% year-over-year decline in Q1 2026 revenue.
The complaint focuses on what it characterizes as ODDITY’s repeated statements about its AI-driven online platform and assurances that it would “sustain our high-growth and attractive margin profile.” The lawsuit alleges the company made false and misleading statements while failing to disclose crucial information to investors.
Specifically, the complaint alleges that ODDITY did not disclose an algorithm change by its largest advertising partner. According to the allegations, the change diverted ODDITY’s advertisements to lower-quality auctions at abnormally high costs.
The lawsuit says the higher costs increased ODDITY’s customer acquisition costs and harmed the company’s business and financial outlook. It further alleges that these issues led ODDITY to overstate the overall strength, stability, and sustainability of its digital operating model.
Investors’ expectations were affected on February 25, 2026, when ODDITY announced its Q4 and FY 2025 financial results and disclosed that it had “experienced a dislocation in our account with our largest advertising partner” that it believed was driven by algorithm changes. The company said the changes diverted it to lower-quality auctions at abnormally high costs, which it said drove new user acquisition costs significantly higher.
During the related earnings call, an analyst asked when ODDITY first became aware of the dislocation. The company’s response, as described in the filing, indicated it had “observed that something was different in the second half of 2025,” without specifying when the issue began.
The complaint also points to ODDITY’s quantified outlook for the dislocation’s effects, stating that Q1 2026 revenue is expected to decline 30% year-over-year.
Hagens Berman said it is investigating when ODDITY first knew about the dislocation and whether the company may have intentionally misled investors about the strength of its AI growth driver.
The firm is encouraging investors who suffered significant losses to submit their losses. It also said witnesses with non-public information may consider their options to assist the investigation or take advantage of the SEC Whistleblower program, which it described as offering rewards totaling up to 30% of any successful recovery made by the SEC for eligible whistleblowers providing original information.
For whistleblowers, the firm listed contact details for Reed Kathrein: 844-916-0895 and [email protected].

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