Omnicom Orders Big Four Audit of The Trade Desk’s Fees as Shares Fall

Overview

• The Trade Desk shares fell as much as about 9.9% after Omnicom said it will hire a Big Four firm to audit the platform’s pricing and fee structure.
• Omnicom reported that an initial internal contract check found no issues, and the broader review is a precaution after rival Publicis raised alarms.
• Publicis previously told clients to stop using The Trade Desk after a FirmDecisions audit reportedly alleged improper fees and unauthorized opt-ins to paid features.
• The Trade Desk disputed those findings, saying the dispute stems from privacy-driven contract terms and asserting its practices followed client agreements.
• Agency holding companies drove about 30% of spending on the platform in 2025, so any pullback could hit revenue as tensions rise over CEO Jeff Green’s push to work directly with brands.