The two largest state health insurance co-operatives created as part of a grand ObamaCare experiment have announced they are closing at the end of this year, joining others that have failed and even more that are insolvent and likely to fail.

The Kentucky Health Cooperative announced on Friday it is going out of business and will not enroll new members next year, leaving 51,000 members to find other coverage. It had the second-largest co-op enrollment in the country, garnering 75% of people who enrolled in coverage through the state’s health exchange.