This report uses new enrollment data to examine insurer type enrollment trends from 2016-2018. We use this data to analyze enrollment trends by insurer type and to see if this is becoming more or less important to consumer choice over time. We find that Medicaid insurers over this period have increased their footprint and generally had lower priced silver options, enrolling around 27 percent of total FFM enrollment in 2018. Blue Cross plans, despite often having higher premiums still are the dominant insurer type. Enrolling 47 percent of the total FFM marketplace. Medicaid insurers however, from 2016-2018 grew steadily in participation and enrollment, meaning further shifts between insurer types are possible if not likely.