This document is about a report on private sector, employer-sponsored group health plans that filed the 2019 Form 5500. It provides detailed statistics on the characteristics, finances, and participant information of these plans, categorized by whether they are self-insured, fully insured, or have both self-insured and fully insured components (mixed-insured). The report covers topics such as plan funding arrangements, assets and liabilities, cash flows, and the distribution of plans and participants by various factors like plan size and industry.