“The judge did agree that Google violated the Sherman Act by monopolizing and unlawfully tying two parts of the adtech stack together, specifically DFP and AdX, and that Google is guilty of abuse of monopoly power in the publisher-side adtech.”

A federal judge found Google illegally monopolized publisher ad tech and tied its ad server to its own exchange. It is the second monopoly ruling against Google, after search. Remedies could force a sale of Google Ad Manager. Google says it won half and will appeal the rest.