This document is about an annual report to Congress on self-insured group health plans, as required by the Affordable Care Act. It provides aggregate statistics on self-insured and mixed-insured group health plans that file a Form 5500, including information on plan type, participants, funding arrangements, assets, contributions, and benefits. It also discusses the differences between self-insured, fully-insured, and mixed-insured plans, as well as the limitations of the Form 5500 data.