| 26201 | Serio Oil Corp. | | Oil & Gas Operator | Sep 1991 |
| 26202 | Serio Operating Company | | Oil & Gas Operator | Mar 2007 |
| 26203 | Serio-Punches Oil Co | | Oil Operator | Jan 2008 |
| 26204 | Serna Inc. | Austin, TX 78733 | Oil Operator | Nov 2024 |
| 26205 | Serra Energy, Inc. | Hailey, ID 83333 | Oil & Gas Operator | May 2011 |
| 26206 | Servco Productio | | Oil Operator | Dec 1992 |
| 26207 | Service Clearing Corp. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2024 |
| 26208 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 26209 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 26210 | Service Production Company, Inc. | Santa Fe, TX 77510 | Oil & Gas Operator | May 1999 |
| 26211 | Ses Oil | | Oil Operator | Jun 2004 |
| 26212 | Ses Production | | Oil & Gas Operator | Oct 2023 |
| 26213 | Sescil, Douglas W. | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 26214 | Sessions Billy C | Muskogee, OK 74401-5323 | Oil Operator | Apr 2007 |
| 26215 | Setab Prod. | Batson, TX 77519 | Oil & Gas Operator | Nov 2024 |
| 26216 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 26217 | Setex Oil Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jan 2000 |
| 26218 | Settco Oil & Gas | | Oil & Gas Operator | May 1994 |
| 26219 | Settlers Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2000 |
| 26220 | Settlers Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 1998 |
| 26221 | Sev Texas Operating, LLC | Long Beach, CA 90755 | Oil & Gas Operator | Nov 2024 |
| 26222 | Sevarg Company, Inc. | | Oil & Gas Operator | Feb 2016 |
| 26223 | Seven Cross Operating, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2024 |
| 26224 | Seven Falls Company | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 26225 | Seven Horses LLC | Alva, OK 73717-5004 | Oil & Gas Operator | Sep 2024 |
| 26226 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Aug 2024 |
| 26227 | Seven Lakes Operating LLC | Austin, TX 78746 | Oil Operator | Nov 2024 |
| 26228 | Seven Sisters Oil & Gas LLC | Casper, WY 82602 | Oil & Gas Operator | Jan 2022 |
| 26229 | Seven To One Oil & Gas LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2023 |
| 26230 | Seven Wells Oil & Gas Expl. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2014 |
| 26231 | Sevenbar Resources, LLC | Hallettsville, TX 77964 | Oil & Gas Operator | Nov 2024 |
| 26232 | Seventh Corporation The | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2006 |
| 26233 | Seventy Oil Co. | Freer, TX 78357 | Oil & Gas Operator | Mar 2002 |
| 26234 | Seventy-One Inc | | Oil & Gas Operator | May 1999 |
| 26235 | Sevenx, LLC | Iowa Park, TX 76367 | Oil Operator | Nov 2024 |
| 26236 | Severtson, James C. | Allegany, NY 14706 | Oil & Gas Operator | Dec 2023 |
| 26237 | Sevitski & Associates Inc | Pryor, OK 74361 | Oil & Gas Operator | Dec 2000 |
| 26238 | Sewell Operating, Inc | | Oil Operator | Dec 2008 |
| 26239 | Sewell Production, LLC | El Dorado, AR 71730 | Oil Operator | Jul 2024 |
| 26240 | Sexton Oil Company | Camden, AR 71701 | Oil Operator | Apr 2024 |
| 26241 | Seydell, E. Morris | Wichita Falls, TX 76307 | Oil Operator | Feb 1993 |
| 26242 | Seymour Oil Co., Inc. | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 26243 | Seymour, James & Lorraine | Cut Bank, MT 59427 | Oil Operator | Jul 2022 |
| 26244 | Sfeop | Midland, TX 79701 | Oil & Gas Operator | Mar 1994 |
| 26245 | SFJV Enterprises, Inc. | Berclair, TX 78107 | Gas Operator | Aug 1998 |
| 26246 | SFM Holdings, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 1995 |
| 26247 | SG Interests I LTD | Houston, TX 77007 | Oil & Gas Operator | Sep 2024 |
| 26248 | SG Interests, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jun 2007 |
| 26249 | SGB Oil LLC | Luling, TX 78648 | Oil Operator | Nov 2024 |
| 26250 | Sgcu GP LLC | Casper, WY 82602 | Oil Operator | Sep 2024 |
| 26251 | SGP Operating LLC | Dallas, TX 75205 | Oil & Gas Operator | Nov 2024 |
| 26252 | SH Oil Operations LLC | Wichita, KS 67277 | Oil & Gas Operator | Jul 2024 |
| 26253 | Sha Stephens, Incorporated | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2006 |
| 26254 | Sha-Jam Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 26255 | Shack, Bill | Albany, TX 76430 | Oil & Gas Operator | Apr 2006 |
| 26256 | Shackelford Oil Co | Midland, TX 79707 | Oil & Gas Operator | Sep 2024 |
| 26257 | Shackelford,Frank Oil Properties | Midland, TX 79701 | Oil & Gas Operator | Aug 1997 |
| 26258 | Shadawn Corporation | Wichita Falls, TX 76310 | Oil & Gas Operator | Mar 2005 |
| 26259 | Shadco | Worland, WY 82401 | Oil & Gas Operator | Sep 2024 |
| 26260 | Shade Tree Oil C | | Oil Operator | Oct 1987 |
| 26261 | Shadow Wolf Energy LLC | | Oil Operator | Sep 2024 |
| 26262 | Shadow-Del Oil Company | Kiefer, OK 74041-0453 | Oil & Gas Operator | Jul 2015 |
| 26263 | Shadowpeak Operating LLC | Oklahoma City, OK 73159-6905 | Oil & Gas Operator | Aug 2024 |
| 26264 | Shadrack Production Company | | Gas Operator | Dec 1982 |
| 26265 | Shady Oil Co. | Brownwood, TX 76801 | Oil & Gas Operator | Nov 2024 |
| 26266 | Shafer Berman J | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 26267 | Shafer David Oil Prod Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 26268 | Shaffer Oil Co., Inc. | Burlington, KS 66839 | Oil & Gas Operator | Jul 2001 |
| 26269 | Shaffer Oil Leas | | Oil Operator | May 1993 |
| 26270 | Shag Bark Land And Cattle Co. LLC | Olean, NY 14760 | Oil & Gas Operator | Dec 2021 |
| 26271 | Shahan, Donald Allan | Abilene, TX 79602 | Oil Operator | Nov 2024 |
| 26272 | Shahara Oil LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Oct 2000 |
| 26273 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2024 |
| 26274 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Aug 2024 |
| 26275 | Shale Energy International, LLC | | Oil & Gas Operator | May 2024 |
| 26276 | Shale Energy LLC | Jeffersonville, KY 40337 | Oil Operator | Dec 2018 |
| 26277 | Shale Gas Production, LLC | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 26278 | Shale Hunter, LLC | Irving, TX 75039 | Oil & Gas Operator | Jan 2016 |
| 26279 | Shale Oil Co., Inc. | Liberty, TX 77575 | Oil & Gas Operator | Nov 2024 |
| 26280 | Shale Operating Co. | Dallas, TX 75356 | Oil & Gas Operator | Nov 2024 |
| 26281 | Shale Properties LLC | Kingfisher, OK 73750 | Oil Operator | Aug 2023 |
| 26282 | Shale Service, Inc. | | Oil & Gas Operator | Apr 2019 |
| 26283 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Apr 2024 |
| 26284 | Shallow Production Oper, LLC | Austin, TX 78738 | Oil Operator | Nov 2024 |
| 26285 | Shamblin Stone Inc. | Dunbar, WV 25064-0510 | Gas Operator | Dec 2021 |
| 26286 | Shamrock Minerals Corporation | Merkel, TX 79536 | Oil & Gas Operator | Nov 1998 |
| 26287 | Shamrock Oil Co. | Sugar Land, TX 77478 | Oil & Gas Operator | Mar 2008 |
| 26288 | Shamrock Operating Company LLC | Cleveland, OK 74020 | Oil Operator | Aug 2022 |
| 26289 | Shamrock Texas Partners L.P. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 2024 |
| 26290 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Sep 2024 |
| 26291 | Shana Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 2002 |
| 26292 | Shanafelt Oil Operating, LLC | Jacksboro, TX 76458 | Oil Operator | Nov 2024 |
| 26293 | Shanafelt, Arthur | Jacksboro, TX 76458 | Oil & Gas Operator | May 2003 |
| 26294 | Shanahan Donald P | Ridgedale, MO 65739 | Oil & Gas Operator | Dec 1990 |
| 26295 | Shaner W G | Longmont, CO 80503 | Gas Operator | Dec 2021 |
| 26296 | Shanghai Energy Corporation | Houston, TX 77027 | Oil & Gas Operator | Apr 2003 |
| 26297 | Shanks Drilling & Production Company LLC | Bixby, OK 74008 | Oil & Gas Operator | Aug 2024 |
| 26298 | Shanks Robert "Bob" | Haskell, OK 74436-8809 | Oil & Gas Operator | Jun 2023 |
| 26299 | Shanks, Bob | Haskell, OK 74436 | Oil Operator | Sep 2002 |
| 26300 | Shannon Corporation Inc | Okmulgee, OK 74447-1323 | Oil & Gas Operator | Mar 2015 |