Notes to Condensed Consolidated Financial Statements (Unaudited)	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Notes to Condensed Consolidated Financial Statements (Unaudited)	Criteo S.A. was initially incorporated as a société par actions simplifiée, or S.A.S., under the laws of the French Republic on November 3, 2005, for a period of 99 years and subsequently converted to a société anonyme, or S.A. On July 29, 2026, Criteo completed its corporate redomiciliation from France to Luxembourg via the cross-border conversion (the "Conversion") of Criteo S.A. from a French public limited liability company ("French Criteo") to a Luxembourg public limited liability company ("Lux Criteo"). In connection with the Conversion, Criteo terminated its American Depositary Share ("ADSs") structure and listed its ordinary shares (the "Ordinary Shares") directly on Nasdaq. Following the Conversion and completion of the Company's works council consultation, Criteo's board of directors approved the subsequent transfer of the Company's legal domicile from Luxembourg to the United States, which will be achieved via a cross-border merger of the Company with and into a wholly owned U.S. subsidiary. Lux Criteo is a public limited liability company (société anonyme) organized and existing under the laws of the Grand Duchy of Luxembourg, having its registered office at 5 Place de la Gare, L-1616, Luxembourg Grand Duchy of Luxembourg . We are a global technology company that enables marketers and media owners to drive better commerce outcomes. We leverage commerce data and artificial intelligence ("AI") to connect ecommerce, digital marketing and media monetization to reach consumers throughout their shopping journey. Our vision is to deliver full-funnel, cross-channel, self-service advertising that performs. Our strategy is to help marketers and media owners activate 1st-party, privacy-safe data and drive better commerce outcomes through our platform, which includes a suite of products: •that offer marketers (brands, retailers, and agencies) the ability to easily reach consumers anywhere throughout their shopping journey and measure their advertising campaigns •that offer media owners (publishers and retailers) the ability to monetize their advertising and promotions inventory for commerce anywhere where consumers spend their time •that are underpinned by our advanced AI engine, analyzing large sets of commerce data in real-time to drive hyper personalization and budget efficiency. In these notes, Criteo S.A. is referred to as the "Parent" company and together with its subsidiaries, collectively, as "Criteo," the "Company," the "Group," or "we".

Notes to Condensed Consolidated Financial Statements (Unaudited)

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Notes to Condensed Consolidated Financial Statements (Unaudited)

Criteo S.A. was initially incorporated as a société par actions simplifiée, or S.A.S., under the laws of the French Republic on November 3, 2005, for a period of 99 years and subsequently converted to a société anonyme, or S.A. On July 29, 2026, Criteo completed its corporate redomiciliation from France to Luxembourg via the cross-border conversion (the "Conversion") of Criteo S.A. from a French public limited liability company ("French Criteo") to a Luxembourg public limited liability company ("Lux Criteo"). In connection with the Conversion, Criteo terminated its American Depositary Share ("ADSs") structure and listed its ordinary shares (the "Ordinary Shares") directly on Nasdaq. Following the Conversion and completion of the Company's works council consultation, Criteo's board of directors approved the subsequent transfer of the Company's legal domicile from Luxembourg to the United States, which will be achieved via a cross-border merger of the Company with and into a wholly owned U.S. subsidiary.

Lux Criteo is a public limited liability company (société anonyme) organized and existing under the laws of the Grand Duchy of Luxembourg, having its registered office at 5 Place de la Gare, L-1616, Luxembourg Grand Duchy of Luxembourg .

We are a global technology company that enables marketers and media owners to drive better commerce outcomes. We leverage commerce data and artificial intelligence ("AI") to connect ecommerce, digital marketing and media monetization to reach consumers throughout their shopping journey. Our vision is to deliver full-funnel, cross-channel, self-service advertising that performs.

Our strategy is to help marketers and media owners activate 1st-party, privacy-safe data and drive better commerce outcomes through our platform, which includes a suite of products:

•that offer marketers (brands, retailers, and agencies) the ability to easily reach consumers anywhere throughout their shopping journey and measure their advertising campaigns

•that offer media owners (publishers and retailers) the ability to monetize their advertising and promotions inventory for commerce anywhere where consumers spend their time

•that are underpinned by our advanced AI engine, analyzing large sets of commerce data in real-time to drive hyper personalization and budget efficiency.

In these notes, Criteo S.A. is referred to as the "Parent" company and together with its subsidiaries, collectively, as "Criteo," the "Company," the "Group," or "we".