Judge Leonie Brinkema ruled Thursday that Google has “willfully engaged in a series of anticompetitive acts” to maintain a monopoly in the publishing ad server and ad exchange markets, including eliminating competitors through acquisitions and forcing customers to use the company’s products, among others.

Brinkema, however, also ruled prosecutors failed to successfully argue Google held a monopoly over advertiser ad networks, suggesting they used a market term “not common in the digital advertising industry.”