Trade secret law is state law. For most of its history it was also common law. However, trade secret law was dramatically transformed by the Uniform Trade Secrets Act, which has been enacted in forty-seven states. Although now statutory law, the law of trade secrets retains the basic character of its common law roots, often relying without significant elaboration on concepts developed through common law adjudication. Harvey Perlman and I were the Reporters for the American Law Institute’s Restatement (Third) of Unfair Competition, which includes an analysis of trade secret law applicable to actions under the Uniform Act. The trade secret sections of the Restatement do not of course substitute for the statutory text, but they can be helpful aids in interpreting the statute. This article examines the changes in trade secret law made by the Uniform Act as analyzed in the Restatement (Third) of Unfair Competition.