Regulated Industries

• ATCO Gas, Canada
• Baker Energy, USA
• CITGO Petroleum Corporation, USA 
• EOG Resources Inc, USA
• Haliburton, USA 
• Helix Water District, USA 
• Nebraska Public Power District, USA
• Newfoundland Hydro, Canada
• Northwest Natural Gas Company, USA 
• Pennsylvania Power Light (PPL) USA
• Tampa Bay Water, Florida, USA
• The National Gas Company of Trinidad and Tobago Limited
• Toronto Hydro, Canada