A company owned by Goldman Sachs' private equity arm, Rhythm Energy, petitioned the U.S. Federal Energy Regulatory Commission (FERC) in October to sell electricity, according to a filing with the regulatory agency. If approved, Rhythm Energy, which is owned by Goldman Sachs' West Street Capital Partners VII fund, would offer retail electricity contracts, according to the filing dated Oct. 16. On Oct. 24, the FERC approved applications by Goldman Sachs-owned J. Aron & Company LLC to control GenOn's fleet of fossil fuel power facilities out of bankruptcy, according to a FERC filing.