This document is about the annual report to the U.S. Congress on self-insured group health plans, as required by the Affordable Care Act. It provides detailed statistics and data on self-insured and mixed-insured group health plans that file the Form 5500, including the number of plans, participants, funding arrangements, benefits offered, assets, contributions, and expenses. The report also presents an analysis of the financial information available on employers that sponsor self-insured plans, showing that they tend to be larger companies. The document highlights the limitations of the Form 5500 data and the complexities involved in interpreting the available information on self-insured health plans.