| 1 | BEPX | Wycon Chemical Co. | added 4/1986 | | NAKINA |
| 2 | BEPX | Belcher Oil Co. | 7/1930-4/1961; eliminated 4/1962; added 11/1973; 1/1975; eliminated 7/1978 | | NAKINA |
| 3 | BEPX | Coastal States Energy Co. | added 7/1978; 1/1980; eliminated 4/1986 | | NAKINA |
| 4 | BEPX | Belcher Oil Co. | 4/38-4/61; eliminated 4/62; added 11/73; 1/75; eliminated 7/78 | | NRHS |
| 5 | BEPX | Coastal States Energy Co. | added 7/78; 1/80; eliminated 4/86 | | NRHS |
| 6 | BEPX | Wycon Chemical Co. | added 4/86 | | NRHS |
| 7 | BEPX | *WYCON CHEMICAL CO. [BELCHER OIL CO; COASTAL STATES ENERGY CO.] | | | PWRC |
| 8 | BEPX | +PIONEER TRAIL ENERGY, LLC | | | PWRC |
| 9 | BEPX | Belcher Oil (Coastal States Energy) | | | RSRV |
| 10 | BEPX | PIONEER TRAIL ENERGY LLC | | | SCAC4 |