This just in via CMS:

Effectuated Enrollment for the First Half of 2019

This report provides average monthly effectuated enrollment and premium data for the individual market Federal and State-Based Exchanges for the first six months of the 2019 plan year. The Centers for Medicare & Medicaid Services (CMS) publishes effectuated enrollment data semiannually to provide a more accurate picture of enrollment trends for the Exchanges than indicated by the number of individuals who simply selected a plan during Open Enrollment. For coverage to be considered effectuated, individuals generally must pay the first month’s premium for the plan.