| 1 | OPIC | OCEAN PETROLEUM INC | | | SCAC4 |
| 2 | OPIL | ONSTREAM PIPELINE INSPECTION LTD | | | SCAC4 |
| 3 | OPIN | OAKCREEK PROPANE INC | | | SCAC4 |
| 4 | OPIX | Equistar Chemicals, LP | added 10/1998; 7/2000-7/2005 | | NAKINA |
| 5 | OPIX | Occidental Chemical Corp. | added 1/1992; 1/1994; eliminated 10/1998 | | NAKINA |
| 6 | OPIX | Occidental Chemical Corp., Petrochemicals Division | added 4/1991; eliminated 1/1992 | | NAKINA |
| 7 | OPIX | OXY Petrochemicals Inc. | eliminated 4/1991 | | NAKINA |
| 8 | OPIX | OXY USA Inc. | added 1/1991 | | NAKINA |
| 9 | OPIX | OXY NGL, Inc. | eliminated 1/1991 | | NAKINA |
| 10 | OPIX | OXY Petrochemicals Inc. | added 7/1990 | | NAKINA |
| 11 | OPIX | OXY Petrochemicals Inc. | added 7/90 | | NRHS |
| 12 | OPIX | OXY NGL, Inc. | eliminated 1/91 | | NRHS |
| 13 | OPIX | OXY USA Inc. | added 1/91 | | NRHS |
| 14 | OPIX | OXY Petrochemicals Inc. | eliminated 4/91 | | NRHS |
| 15 | OPIX | Occidental Chemical Corp., Petrochemicals Division | added 4/91; eliminated 1/92 | | NRHS |
| 16 | OPIX | Occidental Chemical Corp. | added 1/92; 1/94; eliminated 10/98 | | NRHS |
| 17 | OPIX | Equistar Chemicals, LP | added 10/98; 7/2000 | | NRHS |
| 18 | OPIX | EQUISTAR CHEMICALS, LP [OCCIDENTAL CHEMICAL CORP., - PETROCHEMICALS DIVISION; OXY USA, INC.; OXY NGL, INC.; OXY PETROCHEMICALS] | | | PWRC |
| 19 | OPIX | Equistar Chemicals | | | RSRV |
