> In this case, unlike in Illinois Brick, the iPhone owners are not consumers at the bottom of a vertical distribution chain who are attempting to sue manufacturers at the top of the chain. There is no intermediary in the distribution chain between Apple and the consumer. The iPhone owners purchase apps directly from the retailer Apple, who is the alleged antitrust violator. The iPhone owners pay the alleged overcharge directly to Apple. The absence of an intermediary is dispositive.

Key paragraph from opinion.