| 23201 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 23202 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 23203 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 23204 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 23205 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | Nov 2025 |
| 23206 | Petro-Raider LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 23207 | Petro-Search, Inc. | | Oil Operator | Jul 1992 |
| 23208 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2026 |
| 23209 | Petro-Technology | | Oil & Gas Operator | Aug 1991 |
| 23210 | Petro-Technology, Inc. | Topeka, KS 66604 | Gas Operator | Dec 1997 |
| 23211 | Petro-Tex Energy & Expl.Co.,Inc. | Llano, TX 78643 | Oil & Gas Operator | Feb 2026 |
| 23212 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 23213 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |
| 23214 | Petro-X Corporation | Houston, TX 77092 | Oil & Gas Operator | Jul 2002 |
| 23215 | Petrobal Omega 1, LLC | Little Elm, TX 75068 | Oil & Gas Operator | Feb 2026 |
| 23216 | Petrobank Opr Co | Denver, CO 80202-4675 | Gas Operator | Dec 1992 |
| 23217 | Petroc Company | Rocky River, OH 44116 | Oil Operator | Dec 2008 |
| 23218 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 23219 | Petrocarbon Energy Corporation | | Oil Operator | Sep 1996 |
| 23220 | Petrocarbon Energy Trust | | Oil Operator | Sep 1996 |
| 23221 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Feb 2026 |
| 23222 | Petrocoastal, Inc. | Frisco, TX 75036 | Oil & Gas Operator | Feb 2026 |
| 23223 | Petrocon Inc | Delaware, OH 43015-7147 | Oil & Gas Operator | Dec 2010 |
| 23224 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 23225 | Petrocorp Acquisition Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2002 |
| 23226 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 23227 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 23228 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 23229 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 23230 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 23231 | Petrodril Inc | Farmington, NM 87401 | Oil & Gas Operator | Jan 1987 |
| 23232 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 23233 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 23234 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 23235 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 23236 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 23237 | Petrogas Energy Services, LLC | Dallas, TX 75214 | Oil Operator | Feb 2026 |
| 23238 | Petrogas Exploration Inc | | Oil Operator | Jul 2025 |
| 23239 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 23240 | Petrogen, Incorporated | Katy, TX 77450 | Oil & Gas Operator | Jan 2012 |
| 23241 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 23242 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 23243 | Petroglyph Operating Co Inc Adba Petroglyph Energy | | Gas Operator | Oct 2011 |
| 23244 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 23245 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 23246 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 23247 | Petrohunter Operating Company | | Oil & Gas Operator | Dec 2013 |
| 23248 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Dec 2025 |
| 23249 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 23250 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 23251 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 23252 | Petrolantic, Inc. | Independence, KS 67301 | Gas Operator | Feb 1993 |
| 23253 | Petrolegacy Energy II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2023 |
| 23254 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 23255 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | Feb 2026 |
| 23256 | Petroleum Advisors Int'L., Inc. | Houston, TX 77224 | Gas Operator | Jun 2005 |
| 23257 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Feb 2026 |
| 23258 | Petroleum Consultants Inc | Texhoma, OK 73949-9804 | Gas Operator | Jul 2007 |
| 23259 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 23260 | Petroleum Corpor | | Oil Operator | Jan 1983 |
| 23261 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 23262 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 23263 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 23264 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 23265 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 23266 | Petroleum Development LLC | | Oil Operator | Jul 2018 |
| 23267 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 23268 | Petroleum Energy Corp | | Oil & Gas Operator | Jul 2012 |
| 23269 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 23270 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 23271 | Petroleum Engineers Inc. Agent | | Oil & Gas Operator | Sep 1986 |
| 23272 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 23273 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 23274 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 23275 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 23276 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 23277 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 23278 | Petroleum Exploration Company LTD Dba Petex | | Oil & Gas Operator | Dec 2025 |
| 23279 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2025 |
| 23280 | Petroleum Exploration Company LTD., Limited | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 23281 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 23282 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 23283 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 23284 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 23285 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 23286 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 23287 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 23288 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 23289 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 23290 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | Mar 2011 |
| 23291 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 23292 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Feb 2026 |
| 23293 | Petroleum Prod. MGMT | | Oil Operator | Nov 1995 |
| 23294 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 23295 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 23296 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 23297 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 23298 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Feb 2026 |
| 23299 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
| 23300 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |