This document is about an analysis of the funding mechanisms of employer-sponsored health benefit plans that filed Form 5500 filings. It compares fully insured, self-insured, and mixed-funded health plans, and presents findings on the prevalence of self-insurance, stop-loss coverage, and the relationship between funding mechanisms and financial health of plan sponsors. The analysis covers reporting periods that ended in 2009-2018 and was conducted by Advanced Analytical Consulting Group, Inc. on behalf of the U.S. Department of Labor.