Ad tech company PK4 Media has acquired Prosperio, a developer of direct platforms for display and video ads.

Financial details were not disclosed. Prosperio will move from its Santa Monica location to PK4’s El Segundo office.

PK4 is a cross-platform media company that uses a single system across Web, mobile and tablet devices for its digital media and banner ads. The acquisition will allow digital ad buyers to buy inventory directly from publishers.

Click here for a more in-depth look at PK4 Media’s acquisition of Prosperio.

Staff reporter Melissah Yang can be reached at [email protected]. Follow her on Twitter @MelissahYang for the latest in L.A. tech news.