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, it also considers the linked citations and the total amount of patents for these companies. 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.