This document discusses how companies become platform leaders. It defines platforms as systems of technologies that combine core components with complementary products from various firms. The platform leader and complementors form an innovation ecosystem that increases platform and complement value as more users adopt the platform. Platforms fuel continuous third-party innovation, transforming products into living systems with unforeseen uses. The document outlines how products can become platforms through coring, which identifies core elements resolving technical problems, and tipping, which shapes market dynamics to the platform's advantage. Size helps tipping but coring depends on technological leadership, not company size.