Authorized Buyers
Ad Exchange / Programmatic Marketplace · part of Google
Last updated Jun 22, 2026 by the ATDb Editorial Team
At a glance
Google's ad exchange product within Google Ad Manager, formerly known as AdX (DoubleClick Ad Exchange). Renamed Authorized Buyers in 2018 as part of the DoubleClick → GAM consolidation. Central to the DOJ antitrust ruling: April 2025 Judge Brinkema decision found Google illegally monopolized this market (one of the two GAM markets where liability was established). Remedies trial ongoing 2025-2026; mid-2026 ruling expected. DOJ has sought divestiture of AdX.
About
Largest open-web ad exchange globally; subject of DOJ monopolization finding (April 2025); divestiture pending in remedies phase
Business model
Auction-based ad-exchange (revenue-share)
Target market
DSPs, Agency Trading Desks, Programmatic Buyers