Arandell Corp. v. CenterPoint Energy Services, Inc.

(United States Ninth Circuit) – Reinstated an antitrust claim against a wholly owned natural gas subsidiary that said it had no knowledge of its parent company’s alleged price-fixing scheme that had pumped up the price of gas. The subsidiary argued that it could not be held liable for violating Wisconsin antitrust law because it was not involved in anything unlawful that its parent company may have done. Unpersuaded, the Ninth Circuit emphasized that a parent and a wholly owned subsidiary always act as a single enterprise whenever they engage in coordinated activity, and thus reversed the grant of summary judgment to the subsidiary.