This document is about an annual report to the U.S. Congress on self-insured group health plans. It provides detailed statistics on self-insured and mixed-insured group health plans that filed a Form 5500, including the number of plans, participants, funding arrangements, assets, contributions, and expenses. The report also analyzes financial information on the employers sponsoring these plans, showing that companies offering self-insured or mixed-insured plans tend to be larger than those offering fully-insured plans. The report highlights the limitations of the data available from the Form 5500 filings and the Department of Labor's efforts to enhance reporting requirements to better capture information on self-insured health plans.