| Coast Electric Power Association | 501(c)(12) | Bay St Louis, MS | $231 million |
| Otero County Electric Cooperative (OCEC) | 501(c)(12) | Cloudcroft, NM | $35 million |
| Southwest Power Pool (SPP) | 501(c)(6) | Little Rock, AR | $249 million |
| Northeast Public Power Association (NEPPA) | 501(c)(6) | Littleton, MA | $2.8 million |
| California Independent System Operator (CAISO) | 501(c)(3) | Folsom, CA | $255 million |
| New York Independent System Operator / Cheryl Hussey (NYISO) | 501(c)(3) | Rensselaer, NY | $213 million |
| Energy Trust of Oregon | 501(c)(3) | Portland, OR | $207 million |
| District Energy St Paul | 501(c)(3) | Saint Paul, MN | $45 million |
| Medical Center Company (MCCo) | 501(c)(3) | Cleveland, OH | $42 million |
| ReliabilityFirst (RF) | 501(c)(3) | Cleveland, OH | $26 million |
| Midwest Reliability Organization | 501(c)(3) | St Paul, MN | $18 million |
| Touchstone Energy Cooperative | 501(c)(6) | Arlington, VA | $10 million |
| Public Power Association of New Jersey | 501(c)(6) | Butler, NJ | $5.2 million |
| Electric Reliability Council of Texas (ERCOT) | 501(c)(4) | Austin, TX | $355 million |
| ISO New England (ISO-NE) | 501(c)(3) | Holyoke, MA | $210 million |
| Griffiss Utility Services Corporation (GUSC) | 501(c)(3) | Rome, NY | $12 million |
| Texas Reliability Entity | 501(c)(3) | Austin, TX | $15 million |
| Old Dominion Electric Cooperative | 501(c)(12) | Glen Allen, VA | $1.0 billion |
| Wabash Valley Power Alliance (WVPA) | 501(c)(12) | Indianapolis, IN | $934 million |
| Withlacoochee River Electric Cooperative | 501(c)(12) | Dade City, FL | $584 million |
| Attn Michelle Fortner CFO | 501(c)(12) | Marietta, GA | $472 million |
| Sawnee Electric Membership Corporation | 501(c)(12) | Cumming, GA | $442 million |
| Georgia Transmission Corporation | 501(c)(12) | Tucker, GA | $380 million |
| Walton EMC | 501(c)(12) | Monroe, GA | $369 million |
| Core Electric Cooperative | 501(c)(12) | Sedalia, CO | $345 million |
| GreyStone Power Corporation | 501(c)(12) | Douglasville, GA | $337 million |
| Energyunited Electric Membership Corporation | 501(c)(12) | Statesville, NC | $283 million |
| Connexus Energy | 501(c)(12) | Ramsey, MN | $266 million |
| Snapping Shoals EMC | 501(c)(12) | Covington, GA | $249 million |
| Dakota Electric Association | 501(c)(12) | Farmington, MN | $219 million |
| Georgia Energy Cooperative | 501(c)(12) | Tucker, GA | $212 million |
| Coweta-Fayette Emc | 501(c)(12) | Palmetto, GA | $210 million |
| San Miguel Electric Cooperative | 501(c)(12) | Jourdanton, TX | $188 million |
| PNGC Power (PNGC) | 501(c)(12) | Clackamas, OR | $178 million |
| Union Power Cooperative | 501(c)(12) | Monroe, NC | $177 million |
| Attn Phyllis Redd | 501(c)(12) | Jackson, GA | $159 million |
| Medina Electric Cooperative Incorporated | 501(c)(12) | Hondo, TX | $157 million |
| Cuivre River Electric Cooperative | 501(c)(12) | Troy, MO | $137 million |
| York Electric Cooperative | 501(c)(12) | York, SC | $136 million |
| East Central Energy | 501(c)(12) | Braham, MN | $136 million |
| Carroll Electric Membership Corporation | 501(c)(12) | Carrollton, GA | $135 million |
| Karnes Electric Cooperative | 501(c)(12) | Karnes City, TX | $131 million |
| Mountain View Electric Association (MVEA) | 501(c)(12) | Limon, CO | $128 million |
| Wright-Hennepin Cooperative Electric Association | 501(c)(12) | Rockford, MN | $125 million |
| Attn Andrew Kilgore | 501(c)(12) | Lagrange, GA | $117 million |
| Minnesota Valley Electric Cooperative | 501(c)(12) | Jordan, MN | $112 million |
| Amicalola Electric Membership Corporation | 501(c)(12) | Jasper, GA | $110 million |
| Hendricks Power Cooperative | 501(c)(12) | Danville, IN | $102 million |
| South Central Indiana Rural Electric Membership Corporation | 501(c)(12) | Martinsville, IN | $101 million |
| North American Electric Reliability corporation (NERC) | 501(c)(6) | Atlanta, GA | $90 million |
| Central Texas Electric Cooperative | 501(c)(12) | Fredericksburg, TX | $70 million |
| Johnson County Rural Electric Membership Corporation (JCREMC) | 501(c)(12) | Franklin, IN | $70 million |
| Southwestern Electric Cooperative | 501(c)(12) | Greenville, IL | $64 million |
| Boone Remc | 501(c)(12) | Lebanon in, IN | $63 million |
| Rural Electric Cooperative (REC) | 501(c)(12) | Lindsay, OK | $58 million |
| Southern Rivers Energy Attn Tony Caldwell (SRE) | 501(c)(12) | Barnesville, GA | $54 million |
| Prince George Electric Cooperative (PGEC) | 501(c)(12) | Waverly, VA | $53 million |
| Rushshelby Energy Rural Electric Membership Corporation | 501(c)(12) | Manilla, IN | $51 million |
| Pee Dee Electric Membership Corporation | 501(c)(12) | Lilesville, NC | $50 million |
| Western Electricity Coordinating Council (WECC) | 501(c)(4) | Salt Lake City, UT | $47 million |
| Morgan County Rural Electric Association | 501(c)(12) | Fort Morgan, CO | $44 million |
| Grid Alternatives Affiliates and Subsidiaries | 501(c)(3) | Oakland, CA | $40 million |
| Crawford Electric Cooperative | 501(c)(12) | Bourbon, MO | $36 million |
| Decatur County Rural Electric Membership | 501(c)(12) | Greensburg, IN | $36 million |
| Dunn Energy Cooperative | 501(c)(12) | Menomonie, WI | $28 million |
| Central Electric Cooperative | 501(c)(12) | Parker, PA | $27 million |
| St Croix Electric Cooperative | 501(c)(12) | Hammond, WI | $26 million |
| Firelands Electric Cooperative | 501(c)(12) | New London, OH | $22 million |
| Georgia Electric Membership Corporation | 501(c)(6) | Tucker, GA | $16 million |
| Florida Reliability Coordinating Council | 501(c)(6) | Tampa, FL | $15 million |
| West Oregon Electric Cooperative | 501(c)(12) | Vernonia, OR | $14 million |
| Missouri Electric Cooperatives Association of Mo Electric Cooperatives | 501(c)(6) | Jefferson City, MO | $13 million |
| Electric Cooperatives of South Carolina | 501(c)(6) | Cayce, SC | $12 million |
| North Carolina's Electric Cooperatives | 501(c)(6) | Raleigh, NC | $12 million |
| Western Power Pool | 501(c)(6) | Portland, OR | $9.7 million |
| Indiana Electric Cooperatives | 501(c)(6) | Indianapolis, IN | $9.3 million |
| Tennessee Electric Cooperative Association | 501(c)(6) | Nashville, TN | $8.4 million |
| Alabama Rural Electric Association of Cooperatives | 501(c)(6) | Montgomery, AL | $8.1 million |
| Electric Cooperatives of Mississippi | 501(c)(6) | Ridgeland, MS | $7.1 million |
| Northwest Public Power Association | 501(c)(6) | Vancouver, WA | $5.8 million |
| Iowa Association of Electric Cooperatives (IAEC) | 501(c)(6) | Des Moines, IA | $5.2 million |
| Pennsylvania Rural Electric ASSOCIATION (PREA) | 501(c)(6) | Harrisburg, PA | $4.7 million |
| Minnesota Rural Electric Association | 501(c)(6) | Maple Grove, MN | $4.6 million |
| Wisconsin Electric Cooperative Association | 501(c)(6) | Madison, WI | $3.7 million |
| Montana Electric Cooperative Association (MECA) | 501(c)(6) | Great Falls, MT | $3.0 million |
| South Dakota Rural Electric Association (SDREA) | 501(c)(6) | Pierre, SD | $2.9 million |
| Grand Canyon State Electric Cooperative Association (GCSECA) | 501(c)(6) | Tempe, AZ | $2.4 million |
| Florida Electric Cooperatives Association (FECA) | 501(c)(6) | Tallahassee, FL | $2.3 million |
| Municipal Electric Utilities of Wisconsin (MEUW) | 501(c)(6) | Sun Prairie, WI | $2.2 million |
| Florida Municipal Electric Association (FMEA) | 501(c)(6) | Tallahassee, FL | $2.0 million |
| New Mexico Rural Electrification Cooperative Association (NMRECA) | 501(c)(6) | Santa Fe, NM | $2.0 million |
| Brazos Electric Power Cooperative | 501(c)(12) | Waco, TX | $1.8 billion |
| Central Electric Power Cooperative | 501(c)(12) | Columbia, SC | $1.4 billion |
| East Kentucky Power Cooperative | 501(c)(12) | Winchester, KY | $1.2 billion |
| North Carolina Electric Membership Corporation | 501(c)(12) | Raleigh, NC | $1.2 billion |
| Northern Virginia Electric Co-Op (NOVEC) | 501(c)(12) | Manassas, VA | $998 million |
| Cooperative Energy | 501(c)(12) | Hattiesburg, MS | $956 million |
| Middle Tennessee Electric Membership Corporation | 501(c)(12) | Murfreesboro, TN | $956 million |
| Powersouth Energy Cooperative | 501(c)(12) | Andalusia, AL | $852 million |
| Pedernales Electric Cooperative | 501(c)(12) | Johnson City, TX | $838 million |
| Buckeye Power | 501(c)(12) | Columbus, OH | $832 million |
| Coserv Electric | 501(c)(12) | Corinth, TX | $826 million |
| Golden Spread Electric Cooperative | 501(c)(12) | Amarillo, TX | $772 million |
| South Texas Electric Cooperative | 501(c)(12) | Nursery, TX | $742 million |
| Upper Missouri Power Cooperative | 501(c)(12) | Sidney, MT | $724 million |
| Wolverine Power Supply Cooperative | 501(c)(12) | Cadillac, MI | $706 million |
| Jackson Electric Membership Corporation | 501(c)(12) | Jefferson, GA | $690 million |
| Lee County Electric Cooperative (LCEC) | 501(c)(12) | North Fort Myers, FL | $626 million |
| Kenergy Corporation | 501(c)(12) | Henderson, KY | $624 million |
| Rayburn Country Electric Cooperative | 501(c)(12) | Rockwall, TX | $563 million |
| Southern Maryland Electric Cooperative | 501(c)(12) | Hughesville, MD | $558 million |
| Sumter Electric Cooperative | 501(c)(12) | Sumterville, FL | $537 million |
| Dairyland Power Cooperative | 501(c)(12) | La Crosse, WI | $533 million |
| East Texas Electric Cooperative | 501(c)(12) | Nacogdoches, TX | $496 million |
| Rappahannock Electric Cooperative | 501(c)(12) | Fredericksburg, VA | $493 million |
| Clay Electric Cooperative | 501(c)(12) | Keystone Heights, FL | $477 million |
| Midcontinent Independent System Operator (MISO) | 501(c)(4) | Carmel, IN | $460 million |
| Minnkota Power Cooperative | 501(c)(12) | Grand Forks, ND | $451 million |
| Tri-County Electric Cooperative | 501(c)(12) | Aledo, TX | $435 million |
| Umatilla Electric Cooperative | 501(c)(12) | Hermiston, OR | $409 million |
| Berkeley Electric Cooperative | 501(c)(12) | Moncks Corner, SC | $408 million |
| McKenzie Electric Cooperative | 501(c)(12) | Watford City, ND | $401 million |
| South Central Power Company | 501(c)(12) | Lancaster, OH | $369 million |
| United Cooperative Services | 501(c)(12) | Burleson, TX | $365 million |
| Cumberland Electric Membership Corporation | 501(c)(12) | Clarksville, TN | $355 million |
| Chugach Electric Association | 501(c)(12) | Anchorage, AK | $355 million |
| Mountrail-Williams Electric Cooperative | 501(c)(12) | Williston, ND | $351 million |
| East River Electric Power Cooperative | 501(c)(12) | Madison, SD | $335 million |
| Guadalupe Valley Electric Cooperative | 501(c)(12) | Gonzales, TX | $333 million |
| United Power | 501(c)(12) | Brighton, CO | $320 million |
| Magic Valley Electric Cooperative | 501(c)(12) | Mercedes, TX | $320 million |
| Dixie Electric Membership Corporation | 501(c)(12) | Baton Rouge, LA | $316 million |
| Northeast Texas Electric Cooperative (NTEC) | 501(c)(12) | Longview, TX | $309 million |
| Bluebonnet Electric Cooperative | 501(c)(12) | Bastrop, TX | $304 million |
| Volunteer Energy Cooperative | 501(c)(12) | Decatur, TN | $298 million |
| Southwest Louisiana Electric Membership Corporation | 501(c)(12) | Lafayette, LA | $295 million |
| Arizona Electric Power Cooperative | 501(c)(12) | Benson, AZ | $291 million |
| Golden Valley Electric Association | 501(c)(12) | Fairbanks, AK | $290 million |
| Shenandoah Valley Electric Cooperative | 501(c)(12) | Rockingham, VA | $277 million |
| Carroll Electric Cooperative Corporation | 501(c)(12) | Berryville, AR | $275 million |
| First Electric Cooperative Corporation | 501(c)(12) | Jacksonville, AR | $273 million |
| Great Lakes Energy Cooperative | 501(c)(12) | Boyne City, MI | $262 million |
| Flint Electric Membership Corporation | 501(c)(12) | Reynolds, GA | $250 million |
| Sam Houston Electric Cooperative | 501(c)(12) | Livingston, TX | $249 million |
| Midwest Energy | 501(c)(12) | Hays, KS | $247 million |
| Trinity Valley Electric Cooperative (TVEC) | 501(c)(12) | Kaufman, TX | $236 million |
| Duck River Electric Membership Corporation | 501(c)(12) | Shelbyville, TN | $235 million |
| Central Electric Power Coooperative | 501(c)(12) | Jefferson City, MO | $232 million |
| Owen Electric Cooperative | 501(c)(12) | Owenton, KY | $232 million |
| Delaware Electric Cooperative | 501(c)(12) | Greenwood, DE | $226 million |