The news: The Department of Justice (DOJ) is pushing for Google to sell its AdX ad exchange and its ad server DoubleClick for Publishers (DFP) after a court ruled the company illegally monopolized digital advertising.

The DOJ claims Google monopolized the ad market by bundling AdX and DFP and forcing online publishers to rely on its tools. It stated that Google “ensured that publishers would lose significant revenue if they did not use AdX,” per TechCrunch.

The Justice Department argues that dismantling Google’s dominance in ad exchanges and publisher ad servers is necessary to restore fair competition.

The DOJ’s other demands:

• Google must not operate an ad exchange for 10 years post-sale, and it must open its ad-buying tools (e.g., AdWords) to third-party providers on equal terms.
• It’s also asking Google to share DFP data with competitors and stop using first-party data from YouTube, Gmail, Search, Chrome, and Android for unfair ad-targeting advantages.

Google’s response: Its vice president of regulatory affairs, Lee-Anne Mulholland, said that the DOJ’s proposed measures would disrupt the digital ad market.

“The DOJ’s additional proposals to force a divestiture of our ad tech tools go well beyond the Court’s findings, have no basis in law, and would harm publishers and advertisers,” Mulholland stated in a blog post.

Google’s counteroffer includes opening AdX bidding to third parties and three years of compliance oversight to avoiding forced divestiture.

Zooming out: With Google embroiled in various antitrust cases—including a push to sell its Chrome browser—negotiating alternatives with the DOJ could show good faith and stall punitive legal action.

Our take: If enforced, the DOJ’s proposals could crack open a tightly controlled ad tech market, redistributing power long held by Google. For advertisers, this signals coming shifts in how ad inventory is priced, traded, and measured.

In addition, marketers could effectively gain direct access to premium inventory without Google middlemen, and ad costs could fall as competition reenters the exchange.