| 2101 | Pyramid Oil & Ga | | Oil & Gas Operator | Sep 1987 |
| 2102 | Pyramid Oil Co. | Litchfield PK, AZ 85340 | Oil & Gas Operator | Jan 2018 |
| 2103 | Pyramid Oil Of America, Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2024 |
| 2104 | Pyramid Petroleum, Inc. | | Oil & Gas Operator | May 1992 |
| 2105 | Pyramid Petroleum, Inc.-La Div | | Oil Operator | Jun 1997 |
| 2106 | Pyramid Production Co. | Abilene, TX 79608 | Oil & Gas Operator | Jun 1994 |
| 2107 | Pyro Energy Corp | Kingwood, TX 77339-2102 | Oil & Gas Operator | Mar 1998 |
| 2108 | Pywell Venture A | | Oil Operator | Apr 1988 |