HGGC, a middle market private equity firm, completed the acquisition of RPX, a provider of patent risk and discovery management solutions, for $555m. "We are big believers in RPX's mission to deliver patent risk and discovery management solutions to its clients. RPX's and Inventus's businesses begin and end with the trust of their clients, and we will continue to serve their best interests. We fully support the vision of the Company to build a much-needed clearinghouse in the broader market for patents and will continue RPX's decade-long commitment to never assert patents," Rich Lawson, HGGC CEO.