| Enbridge Pipeline Louisiana Intrastate, LLC | Owner/operator | | 1 | |
| Enbridge Pipelines (LaCrosse) L.L.C. | Owner/operator | | 1 | |
| Enbridge Pipelines (ala Tenn) LLC | Owner/operator | | | |
| Enbridge Pipelines (alabama Gathering) L.l.c. | Owner/operator | | | |
| Enbridge Pipelines (alabama Intrastate) Inc. | Owner/operator | | | |
| Enbridge Pipelines (alatenn) Inc. | Owner/operator | | | |
| Enbridge Pipelines (bamagas Intrastate) Inc. | Owner/operator | | | |
| Enbridge Pipelines (east Texas) L.p. | Owner/operator | | 3 | |
| Enbridge Pipelines (kpc) | Owner/operator | | | |
| Enbridge Pipelines (louisiana Liquids) L.l.c. | Owner/operator | Houston, TX | | 1 |
| Enbridge Pipelines (midla) Inc | Owner/operator | | | |
| Enbridge Pipelines (ne Texas) L.l.c. | Owner/operator | | | |
| Enbridge Pipelines (north Dakota) LLC | Owner/operator | | | |
| Enbridge Pipelines (north Texas) L.p. | Owner/operator | | | |
| Enbridge Pipelines (ozark) L.l.c. | Owner/operator | Houston, TX | | 1 |
| Enbridge Pipelines (sigco Intrastate) L.l.c. | Owner/operator | | | |
| Enbridge Pipelines (southern Lights) L.l.c. | Owner/operator | Houston, TX | 1 | 1 |
| Enbridge Pipelines (tennesse River) L.l.c. | Owner/operator | | | |
| Enbridge Pipelines (tennessee Intrastate) Inc. | Owner/operator | | | |
| Enbridge Pipelines (tennessee River) L.l.c. | Owner/operator | | | |
| Enbridge Pipelines (texas Gathering) Inc. | Owner/operator | | | 12 |
| Enbridge Pipelines (texas Intrasate) L.p. | Owner/operator | Houston, TX | | 1 |
| Enbridge Pipelines (texas Intrastate) Inc. | Owner/operator | Houston, TX | | 1 |
| Enbridge Pipelines (toledo) Inc | Owner/operator | Houston, TX | 1 | 1 |
| Enbridge Pipelines (tx Intra) LP | Owner/operator | | | 4 |
| Enbridge Pipelines, Inc. | Owner/operator | | 1 | |
| Enbridge Processing (mississippi) LLC | Owner/operator | | | |
| Enbridge Storage (cushing) L.l.c. | Owner/operator | Houston, TX | | 1 |
| Enbridge Storage (patoka) L.l.c. | Owner/operator | Houston, TX | | 1 |
| Encameron LLC | Owner/operator | Spring, TX | | 1 |
| Encana Gas Gathering Services (usa) Inc | Owner/operator | | | |
| Encana Oil & Gas (usa) Inc. | Owner/operator | | | |
| Encinal Gathering LTD | Owner/operator | | | |
| Encore Energy Partners Operating LLC | Owner/operator | | | 2 |
| Encore Operating, L.p. | Owner/operator | | | |
| Encrescent LLC | Owner/operator | Dallas, TX | | 3 |
| Endeavor Energy Resources, LP | Owner/operator | Midland, TX | | 2 |
| Enduro Pipeline Services, Inc. | Contractor | | 1 | |
| Endymion Oil Pipeline Company, LLC | Owner/operator | | 1 | |
| Enerfin Field Services LLC | Owner/operator | Houston, TX | | 8 |
| Enerfin Gathering LLC | Owner/operator | Houston, TX | | 10 |
| Enerfin Gathering-East LLC | Owner/operator | Houston, TX | | 28 |
| Enerfin Pipeline LLC | Owner/operator | Houston, TX | | 1 |
| Enerfin Resources 1 Limited Partnership | Owner/operator | Houston, TX | | 1 |
| Enerfin Resources Company | Owner/operator | | | 2 |
| Enerfin Resources I Limited Partnership | Owner/operator | Houston, TX | | 3 |
| Enerfin Resources Ii-92 Limited Partnership | Owner/operator | Houston, TX | | 2 |
| Energas Co | Owner/operator | | | |
| Energen Resources Corp. | Owner/operator | Birmingham, AL | | 2 |
| Energy Assets Operating Company | Owner/operator | | | |