| World Fuel Services, Inc. | Miami | FL | $318M |
| NRG Business Marketing LLC | Princeton | NJ | $160M |
| Tokyo Gas Co.,ltd. | Minato-ku | TOKYO | $148M |
| Washington Gas Light Company | Washington | DC | $133M |
| Enstar Natural Gas Company, LLC | Anchorage | AK | $89.5M |
| Tiger Natural Gas, Inc. | Tulsa | OK | $86.8M |
| Buyo Gas Co.,ltd. | Fussa-shi | | $75.5M |
| Constellation Newenergy - Gas Division, LLC | Louisville | KY | $70.9M |
| Omega Pipeline Company, LLC | Fort Leonard Wood | MO | $54.8M |
| Southern California Gas Company | Los Angeles | CA | $54M |
| Centerpoint Energy Resources Corp. | Houston | TX | $53.8M |
| Samchully Co.,ltd. | Seoul | | $53.7M |
| Atlanta Gas Light Company | Atlanta | GA | $52.6M |
| Sage Energy Trading LLC | Tulsa | OK | $47.6M |
| Nextera Energy Services Gas, LLC | Houston | TX | $46.5M |
| Gas South, LLC | Atlanta | GA | $40.3M |
| Southern Company Gas | Atlanta | GA | $35.6M |
| Piedmont Natural Gas Company, Inc. | Charlotte | NC | $34.8M |
| Enspire Energy, LLC | Norfolk | VA | $34.3M |
| United Energy Trading, LLC | Bismarck | ND | $33.4M |
| Eneos Corporation | Chiyoda-ku | | $32.7M |
| New Mexico Gas Company, Inc. | Albuquerque | NM | $29.1M |
| City Of Philadelphia | Philadelphia | PA | $27.1M |
| San Luis Butane Distributors | Paso Robles | CA | $21.2M |
| Liberty Utilities (peach State Natural Gas) Corp. | Columbus | GA | $20.8M |
| The Gas Company, LLC | Honolulu | HI | $16.3M |
| One Gas Inc.Oklahoma City, OK · UEI HM2LCY6EPN21 | Oklahoma City | OK | $14.9M |
| Atmos Energy Corporation | Dallas | TX | $12.6M |
| Southwest Gas Corporation | Las Vegas | NV | $11.3M |
| One Gas, Inc. | Overland Park | KS | $11M |
| Mansfield Power & Gas LLC | Gainesville | GA | $10.5M |
| One Gas Inc.Austin, TX · UEI MK5CD54K2A64 | Austin | TX | $10.5M |
| Daeryun E&s Co. Ltd. | Seoul | | $9.86M |
| Hope Gas, Inc. | Morgantown | WV | $8.51M |
| Colonial Energy Inc. | Fairfax | VA | $8.26M |
| High Desert Pipeline, Inc. | Spicewood | TX | $7.05M |
| Xpress Natural Gas LLC | Andover | MA | $6.86M |
| Florida Public Utilities Company | Yulee | FL | $6.83M |
| Yeongnam Energy Service Co. Ltd. | Pohang | | $6.78M |
| Ugi Utilities Inc. | Denver | PA | $6.69M |
| West Coast Gas Company, Inc. | Sacramento | CA | $6.48M |
| Virginia Natural Gas, Inc. | Virginia Beach | VA | $5.95M |
| Kyungnam Energy Co.,ltd | Changwon-si | | $5.64M |
| Spire Alabama Inc. | Birmingham | AL | $5.07M |
| Daesung Energy Co.,ltd. | Daegu | | $4.72M |
| Spire Missouri Inc. | Saint Louis | MO | $4.55M |
| Columbia Gas Of Virginia, Inc. | Chester | VA | $4.48M |
| Ikun LLC | Herndon | VA | $3.88M |
| Columbia Gas Of Pennsylvania Inc. | Canonsburg | PA | $3.71M |
| Interconn Resources LLC | Birmingham | AL | $3.68M |
| Clarksville, City Of | Clarksville | TN | $3.6M |
| Vectren Energy Delivery Of Ohio, LLC | Dayton | OH | $3.18M |
| Tv Guy Orlando, LLC | Orlando | FL | $3.15M |
| Peoples Gas System, Inc. | Tampa | FL | $2.94M |
| Northwest Natural Gas Co. | Portland | OR | $2.87M |
| Natural Energy Utility Corp. | Ashland | KY | $2.72M |
| Empire Natural Gas Corporation | Greene | NY | $2.67M |
| Pickens County Natural Gas District | Aliceville | AL | $2.56M |
| Excelerate Gas Marketing, Limited Partnership | The Woodlands | TX | $2.47M |
| City Of Marianna | Marianna | FL | $2.37M |
| Boardwalk Continuum Marketing, LLC | Houston | TX | $2.29M |
| Kentucky Frontier Gas, LLC. | Prestonsburg | KY | $2.28M |
| Public Service Company Of North Carolina, Incorporated | Gastonia | NC | $2.2M |
| Citipower, LLC | Whitley City | KY | $2.1M |
| Vectren LLC | Evansville | IN | $2.09M |
| Mountaineer Gas Co. | Charleston | WV | $2.04M |
| Penn Oak Services LLC | Coatesville | PA | $1.93M |
| Questar Gas Company | Salt Lake City | UT | $1.88M |
| City Of Leesburg | Leesburg | FL | $1.82M |
| Delta Natural Gas Co. Inc. | Winchester | KY | $1.81M |
| Seoul City Gas Co.,ltd. | Seoul | | $1.72M |
| The East Ohio Gas Company | Cleveland | OH | $1.63M |
| Applied LNG Technologies LLC | Westlake Village | CA | $1.62M |
| Okano, K.k. | Naha | | $1.59M |
| Cascade Natural Gas Corp. | Kennewick | WA | $1.54M |
| Pivotal Utility Holdings Inc. | Doral | FL | $1.54M |
| Transparent Energy, LLC | Grosse Pointe Farms | MI | $1.46M |
| South Jersey Gas Co. | Hammonton | NJ | $1.34M |
| The Peoples Gas LGHT & Coke Co. | Chicago | IL | $1.31M |
| Notch 8 LLC | Waynesville | NC | $1.11M |
| Summit Utilities Oklahoma, Inc. | Centennial | CO | $1.04M |
| JPC Energy, LLC | Dequincy | LA | $995K |
| Columbia Gas Of Kentucky, Inc. | Lexington | KY | $991K |
| Energymark LLC | Williamsville | NY | $980K |
| Liberty Utilities (energynorth Natural Gas) Corp. | Londonderry | NH | $907K |
| Nextera Energy Services Midwest, LLC | Juno Beach | FL | $883K |
| Columbia Gas Of Ohio Inc. | Columbus | OH | $789K |
| Pivotal LNG, LLC | Glen Allen | VA | $780K |
| Energo Power & Gas LLC | Woodside | NY | $775K |
| Delta Utilities Services, LLC | New Orleans | LA | $741K |
| Novec Energy Solutions Inc. | Manassas | VA | $736K |
| Nextera Energy Services Georgia, LLC | Juno Beach, | FL | $726K |
| Keyspan Gas East Corporation | Hicksville | NY | $696K |
| Minnesota Energy Resources Corporation | Rosemount | MN | $675K |
| Chopro, K.k. | Sasebo | | $608K |
| Southeast Alabama Gas District, The | Andalusia | AL | $604K |
| Wisconsin Gas LLC | Milwaukee | WI | $587K |
| Southstar Energy Services LLC | Atlanta | GA | $551K |
| Igi Resources Inc. | Boise | ID | $528K |
| Buyo Ekika Gas Co. Ltd. | Hamura | | $439K |
