The story. Yes, Stagwell now owns Freestar: the agency holding company bought the publisher monetization network, and the deal has closed. It acquired Freestar’s technology, services and client relationships, not the publishers themselves. (AdExchanger, 26 October 2026)
01What happened
- The deal is done. Stagwell announced the acquisition on Monday 26 October. The companies did not disclose the price, and Needham & Company advised Freestar.
- The scope is the stack, not the sites. Ben Berentson, CEO of Stagwell’s Owned Media division, said Stagwell is acquiring Freestar’s product offering and services, plus existing client relationships. It is not buying the publishers in the network.
- The network is large. Stagwell’s media business can now draw on inventory and data from more than 1,000 publishers, serving nearly a billion ad requests a day.
- The team stays. Stagwell will keep all of Freestar’s employees and its executive leadership. Freestar CEO Kurt Donnell said the name, leadership, team and offerings stay the same.
- Stagwell wants the data and the paths. The deal is described as a sign that media buyers are moving closer to publishers to shorten supply paths and get audience data to train AI agents.
- Curation is the buyer-side use. Berentson said Stagwell can now curate higher-fidelity audiences across Freestar publishers, add audience extension and improve its own principal media buying. Advertisers still decide whether Freestar inventory goes into a campaign.
- Stagwell will not rewire the partners. Supply-path optimization is a priority, but the company has no plans to micromanage Freestar’s relationships with DSPs, SSPs or other vendors.
02What it means inside a GAM network
The owner of the monetization layer is now also a buyer. Stagwell’s own curation platform, Stagwell Curate, launched this year, and Freestar gives it a supply network to curate from. AdExchanger reports no change to how Freestar publishers are served. What changes is who sits on the other side of the table when Freestar sells that inventory.
For a publisher on a managed network, the questions move from tech to terms. Who can see the request-level data, and is it used for Stagwell’s principal buying? Which deals reach Freestar inventory first? Neither answer is in the reporting, so a publisher on the network has to ask Freestar directly.
For a publisher running Google Ad Manager itself, this is a different read. Berentson argued that publishers should prepare for an agentic era in which flexible data connections matter more than owning sell-side tech. That is an argument for managed services, made by a company that now sells them. It is also a signal that buyers will shorten their paths to supply they can influence, and that supply with clean ownership, ads.txt entries and a named seller is easier for them to choose.
The limit on the evidence: this is one executive’s account of one deal on day one. Nothing yet shows how Stagwell will use the data, or whether publishers see different demand. That is APH desk analysis; AdExchanger does not report it.
Stagwell bought a way to reach more than 1,000 publishers' inventory, and the publishers kept their sites and their account teams.
03What publishers should do about it
04The bottom line
Stagwell bought a way to reach more than 1,000 publishers’ inventory, and the publishers kept their sites and their account teams. If you sit on that network, the question is no longer who runs your ad tech. It is who is buying through it.