The majority of investors in the UK hold their interests through an intermediated chain of securities. The relationships between the investors in the chain are governed by the contracts they have entered into, and the system is largely operated on a “no look through” basis, meaning investors only have rights against their own counterparties. The Law Commission has considered whether to reform the law in this area, in order to give greater rights to ultimate investors. This article considers the impact of any such reform in a securities class action context.