Engaging directly with the question whether Platonic Forms are concepts, David Sedley’s chapter ’Are Platonic Forms Concepts?’ takes its start from the Parmenides 132b–c, where Socrates and Parmenides briefly examine the hypothesis that Forms are ‘thoughts’ (noēmata). Sedley asks what ‘thoughts’ are in that context, and argues that they are not thought contents, but acts of thinking. The chapter offers an ambitious and comprehensive analysis of the classical theory of Forms as showcased in the Phaedo, Republic, Parmenides, and Timaeus, in terms that clarify why Plato was bound to reject the hypothesis considered in the Parmenides (132b–c), namely that Forms are thoughts.