Humana will lose money on its 2016 individual market health plans, and the health insurer expects up to 300,000 will drop their coverage by the end of this year, according to a Securities and Exchange Commission filing released late Friday.

It marks the second investor-owned insurer to publicly disclose the problems it is having with the Affordable Care Act’s insurance markets. UnitedHealth Group has lost millions on the marketplace and said it may exit the exchanges by 2017 if things don’t turn around.