Magnite, the largest independent sell-side platform (SSP) in the ad industry, filed a federal lawsuit against Google today, alleging that the tech behemoth unlawfully monopolized the ad exchange and publisher ad server markets. Google denies the allegations.

In an 81-page complaint reviewed by ADWEEK, Magnite claims that Google’s adtech practices limited publisher choice, unfairly restricted competition and consumer choice, and hampered its business.

“Google’s exclusionary conduct has drastically altered the supply paths through which available display advertising inventory is sold, reducing payouts to publishers, burdening advertisers and publishers with lower-quality matches of advertisements to inventory, and inhibiting choice and innovation across the adtech stack,” the complaint rea

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