The IRIS 20/20 Xtreme is a follow-up to the IRIS 20/20 study earlier this year, this time focusing on the 100 largest cyber incidents of the last five years, totaling $18 billion in reported losses and 10 billion compromised records. This report breaks down the costs, categorizes incident types, identifies the actors behind these events and the actions they employed, and improves understanding of how these events impacted the organizations involved.