The "Most Similar Patent Portfolios" graph in Insights is generated using an algorithm that looks for the most similar IPC Sub Groups within the last 5 years of published applications and patents. It identifies and presents companies who hold patents in the same IPC groups and are therefore likely to be working in a similar technology space. The "Refine Companies" option highlights the top 50 companies, enabling you to explore a wider group of companies that hold similar patent portfolios, and refine down to look at the companies of most interest.