In 2016 and 2017, we conducted a study of root causes in insurer insolvencies and impairments, with the focus on analyzing potential risk factors and prevention measures. The study was sponsored by the Canadian Institute of Actuaries, Casualty Actuarial Society and Society of Actuaries (collectively the sponsoring organizations). It looked at causes of insolvency and decisions made by management, regulators and policyholders over the life cycle of the insolvency. In addition, the study considered ways the actuarial profession can be equipped to help prevent or mitigate future insolvencies. It was also intended to assist other insurance industry practitioners in understanding the complexities of insurance company solvency and the benefits of keeping the actuarial profession in the forefront of company management, operations and regulatory communication. This article provides a summary of our study. The complete report and case studies can be found on the SOA’s website.