Sponsors (8)
The bill seeks to increase competition, transparency, consumer privacy, and enforcement in digital advertising by imposing structural limits and reporting requirements on large ad firms, at the cost of forcing divestitures and imposing compliance burdens that could be costly and create regulatory unpredictability.
Advertisers, publishers, and small businesses gain more competition and likely lower fees because very large ad firms (>$20B revenue) would be barred from vertically owning both exchanges and brokerages, increasing market choice.
Advertisers, publishers, and brokerage customers can obtain greater transaction transparency—detailed bid, price, and routing data—so they can verify fair execution and detect overcharging or unfair routing.
Consumers’ browsing and identity-linked data are better protected because brokerages must anonymize or hash user-identifiable information when responding to data requests.
Very large digital-ad firms (>$20B revenue) and their shareholders face forced divestitures and structural limits that could trigger costly asset sales, legal disputes, and higher compliance expenses, potentially reducing investment or altering services.
Smaller brokerages and exchanges must adopt detailed reporting, extended data-retention, and 2ms clock-synchronization requirements, raising operational and technology compliance costs that could squeeze margins or cause consolidation.
Brokerages and their customers risk exposing sensitive business strategies because providing detailed transaction and routing data—even anonymized—can reveal competitive information or be re-identified in some cases.
Based on analysis of 2 sections of legislative text.
Adds a Clayton Act provision defining digital‑ad terms, bars firms over $20B in annual digital ad revenue from certain ad‑tech ownership combinations, and sets divestiture timing and an effective date one year after enactment.
Introduced March 13, 2025 by Mike Lee · Last progress March 13, 2025
Creates a new antitrust rule for digital advertising by adding a provision to the Clayton Act that defines key ad‑tech terms, sets a $20 billion annual digital‑ad revenue threshold (CPI‑indexed) for coverage, and bars very large ad companies from owning certain combinations of ad‑tech infrastructure (buy‑side/sell‑side brokerages, exchanges, etc.). It also sets an effective date one year after enactment and establishes deadlines and triggers for required divestitures tied to Antitrust Division actions or pre‑merger waiting periods.