This document is about an annual report to Congress on self-insured and mixed-insured group health plans in the United States. It presents statistics on the number of plans, participants, funding arrangements, benefits offered, and financial information based on data from the Form 5500 filings. The report also discusses the limitations of the data and the challenges in interpreting the information due to the complexity of how health benefits are reported on the Form 5500. The document provides detailed appendices with additional analysis on the group health plan data.