Extreme Networks is an American networking company based in San Jose, California. Extreme Networks designs, develops, and manufactures wired and wireless network infrastructure equipment and develops the software for network management, policy, analytics, security and access controls.
Extreme Networks shuttered its Russian operations in March 2022. Since Russia annexed Crimea in 2014, American companies have been prohibited from dealing with MMZ Avangard, a state-owned firm that makes missiles for one of Russia's most sophisticated weapons, the S-400 air-defense system. Top manager at U.S. firm Extreme Networks privately sold high-tech in Russia.