| 1 | HGCA | HGC | | | SCAC4 |
| 2 | HGCC | HUBBERTS PROCESSING AND SALES LIMIT | | | SCAC4 |
| 3 | HGCD | HGC LOGISTICS LTD | | | SCAC4 |
| 4 | HGCL | HARLENS TRUCKING LTD | | | SCAC4 |
| 5 | HGCN | HOLT GAS CO INC | | | SCAC4 |
| 6 | HGCQ | HODGE TRUCKING CO INC | | | SCAC4 |
| 7 | HGCS | HUDSON, G C SUPPLY LIMITED | | | SCAC4 |
| 8 | HGCT | HAGGAN JR, C EXCAVATION | | | SCAC4 |
| 9 | HGCU | THE GAS COMPANY LLC D.B.A. HAWAII GAS | | USA | BIC |
| 10 | HGCX | Southeastern Industrial Enterprises, Inc. | eliminated 10/2006 | | NAKINA |
| 11 | HGCX | Hillsboro Glass Co. | added 4/1974; 1/1975-1/1980; eliminated 10/1991 | | NAKINA |
| 12 | HGCX | Home Gas Corp. | 1/1945-4/1961; eliminated 1/1962 | | NAKINA |
| 13 | HGCX | Home Gas Corp. of Great Barrington | added 1/1962 | | NAKINA |
| 14 | HGCX | Home Gas Corp. | 1/52-4/61; eliminated 1/62 | | NRHS |
| 15 | HGCX | Home Gas Corp. of Great Barrington | added 1/62 | | NRHS |
| 16 | HGCX | Hillsboro Glass Co. | added 4/74; 1/75-1/80; eliminated 10/91 | | NRHS |
| 17 | HGCX | *HOME GAS CORP. OF GREAT BARRINGTON | | | PWRC |
| 18 | HGCX | *RETIRED 01-06-92 ATP (1255) [HILLSBORO GLASS CO.] | | | PWRC |
| 19 | HGCX | *SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | PWRC |
| 20 | HGCX | Hillsboro Glass | | | RSRV |
