This document is about an annual report to the U.S. Congress on self-insured group health plans, providing detailed statistics on these plans that filed a Form 5500, as well as financial information on the employers that sponsor such plans. The report discusses the general information on self-insured plans, including plan type, number of participants, benefits offered, funding arrangements, and benefit arrangements. It also presents data from the financial filings of self-insured employers, including information on assets, liabilities, contributions, investments, and expenses. The report highlights the limitations of the data and the complexities involved in interpreting the information.