The slowest-moving, highest-stakes story in our industry is finally approaching its conclusion. Having already ruled that Google illegally monopolized two markets publishers depend on every day — the publisher ad server (DFP) and the ad exchange (AdX) — Judge Leonie Brinkema is now expected to decide what to do about it. The remedy ruling is the part that actually changes how you make money.
01Where the case stands
The remedy phase concluded in late 2025, and a decision is anticipated in 2026. The two sides are far apart:
| The DOJ wants structural separation | Its central demand is that Google divest AdX, with open-sourcing of ad-server code and, if necessary, divestiture of DFP itself. It also wants AdX opened to all inventory types. Implementation could phase in over many years. |
|---|---|
| Google wants behavioral promises | It opposes any breakup, proposing instead "lighter-touch" fixes — adjustments to publisher contracts and interoperability with rival ad servers — that it argues could be live within a year. |
Most observers expect Brinkema to land on hard conduct remedies first — mandated interoperability, bans on self-preferencing, and independent monitoring — with structural divestiture held in reserve if Google resists or backslides. Publishers who testified were blunt: behavioral guardrails alone won’t fix a system Google controls end to end.
02Why this matters
This is not an abstract Washington fight. DFP and AdX are the cash register and the auction house for a huge share of the open web. The remedy will reshape both.
- Behavioral remedies move slowly and leak. Interoperability mandates and no-self-preferencing rules are easy to announce and hard to verify. If Google keeps the assets, you keep the same counterparty — now wearing a compliance badge — and the burden of proving misbehavior shifts to you and your SSPs.
- A divestiture would genuinely reset the market. An independent AdX, and especially an independent or open-sourced ad server, would let competing exchanges and ad servers fight for your inventory on price and features rather than around Google’s gravity. More competition on the sell side is, structurally, more yield for publishers.
- Either way, lock-in becomes a liability. A vendor under a multi-year remedy decree — or being carved apart — is a vendor in motion. Single-stack dependence on Google’s publisher tools is now a strategic risk to plan around, not a default to assume.
After years of testimony, the question is no longer whether Google broke the law in ad tech — the court already said it did.
03What publishers should do now
04What marketers should do
05The bottom line
After years of testimony, the question is no longer whether Google broke the law in ad tech — the court already said it did. The only question left is whether the fix is a set of promises or a structural break. For publishers, that distinction is the difference between a slightly better version of the status quo and a genuinely more competitive market for your inventory. Watch the remedy, not the verdict.