The document discusses patent licensing companies (PLCs) that have acquired patents in the semiconductor market between 2013-2016. It provides an overview of the main PLCs, including WiLAN, Tessera, Conversant IP Management, Intellectual Ventures, and Acacia Research. The analysis includes rankings of PLCs by number of US patent acquisitions, dynamics of patent acquisitions and reassignments over time, breakdown of acquired patent portfolios by technology, and dynamics of patent litigation activities in the semiconductor market. The report aims to identify the most litigious PLCs, analyze their recent semiconductor patent acquisitions, and highlight potential targets for future patent lawsuits.