Some of the world’s largest energy producers have made investments right here in Oklahoma. More than $20 billion has been invested in Oklahoma during the last 15 years to build 52 wind farms across 26 counties. The following companies and more are members of OK WindPower and have made Oklahoma No. 2 in the nation in wind energy production. In fact, if Oklahoma were a country, we would be considered in the top 10 largest in wind power.