Related by context. Frequent words. (Click for all words.) 74 MDU Resources Group 60 OGE Energy 54 Avista Corp. 53 ALLETE 53 UniSource Energy 51 MarkWest Energy Partners 51 Avista Utilities 50 Enogex 50 Cimarex 50 ONEOK 49 Xcel Energy 49 El Paso Pipeline 49 StanCorp Financial Group 48 PNM Resources 48 ONEOK Partners 47 Questar 47 Allis Chalmers Energy 47 NorthWestern 47 Otter Tail Power 46 WGL Holdings 46 Badger Meter 46 Vulcan Materials 46 NW Natural 46 Energen 46 Sempra Generation 46 Quanta Services 46 Oneok 46 Atmos Energy 46 MarkWest 45 FBL Financial Group 45 Raven Industries 45 WPS Resources 45 Integrys Energy Group 45 Ferrellgas 45 Geokinetics 45 AGL Resources 45 Ormat Technologies Inc. 44 AltaGas 44 CNX Gas 44 PacifiCorp 44 PowerSecure 44 NextEra Energy 44 Spectra Energy 44 Harvest Natural Resources 44 Arch Coal 44 MasTec 44 Comstock Resources 44 NorthWestern Energy 44 Compass Minerals 44 Quest Resource 44 ITC Holdings 44 Northeast Utilities 44 HickoryTech 44 Rosetta Resources 44 Burlington Northern 43 Xcel 43 MarkWest Energy Partners LP 43 Alliant Energy 43 MidAmerican Energy 43 BOK Financial 43 Landstar System Inc. 43 FPL Group 43 Wabtec 43 Kinder Morgan 43 Crosstex Energy 43 Advantage IQ 43 Nicor 43 CNA Surety 43 Avista 43 Fastenal 42 PPL Montana 42 TXCO 42 Celadon Group 42 Plum Creek Timber 42 Westar Energy 42 Stillwater Mining Company 42 Apex Silver 42 Brush Engineered Materials 42 Precision Castparts 42 Viad 42 SkyWest 42 Spectra Energy Corp 42 Flotek 42 Ameren 42 Crosstex 42 Layne Christensen 41 Petrohawk 41 NextEra 41 Plum Creek 41 Astronics 41 Pepco Holdings Inc. 41 NiSource 41 CenterPoint Energy 41 Cal Dive 41 Puget Energy 41 Actuant 41 Commerce Bancshares 41 Vanguard Natural Resources 41 NPPD 41 CIRI 41 Sempra Energy NYSE SRE