Magnite Runs Its First Agentic Campaign, and the Buying Desk Went Along

Agentic advertising has spent the year as a conference topic. Magnite just published a receipt.

The company, the largest independent sell-side advertising business, announced on September 8 that it had launched its first agentic campaign in EMEA in collaboration with Amnet France, the trading desk. The test ran against premium connected TV inventory, which is exactly where the industry's efficiency arguments are hardest to hand-wave.

The framing is notable because agentic buying has mostly been discussed from the demand side, as something a buyer's software does to a seller's marketplace. Running it from the sell side, in partnership with a trading desk, positions Magnite as a participant in the workflow rather than a supply pipe waiting to be optimized against.

Paris was a sensible place to try it. European CTV supply is fragmented across broadcasters and platforms, which makes manual buying laborious and creates a clear before-and-after story for automated agents working across inventory sources. The company said the results offer a real-world look at how agentic buying can improve premium CTV campaigns.

For the wider market, the significance is less about one campaign's performance than about who gets to claim the category. Every major platform is building agents; the ones that publish early collaborations with named partners start shaping what buyers expect an agent to do. Amnet France, for its part, gets to be the desk that went first in the region.

The open question is control. Agentic buying only scales if planners are willing to hand off decisions they currently make by hand, and trust in this category is earned campaign by campaign. First is a useful word, but second and third are the ones that matter.