From Reve:

The Coalition, which provided additional statements in an April press release, includes: Advanced Energy Economy, the American Council on Renewable Energy, the American Wind Energy Association, Brookfield Renewable, Calpine Corporation, Competitive Power Ventures, the Electric Power Supply Association, PJM Power Providers Group, the Independent Power Producers of New York, the Natural Gas Supply Association, LS Power, the R Street Institute and Vistra Energy.