| 26901 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | May 2025 |
| 26902 | Siana Oil & Gas., L.L.C | | Oil & Gas Operator | Dec 2021 |
| 26903 | Siana Operating LLC | Conroe, TX 77305224 | Oil & Gas Operator | May 2017 |
| 26904 | Sicko Jaquetta Len | Muldoon, TX 78949 | Oil Operator | Feb 2025 |
| 26905 | Sideline Oil & Gas, L.P. | Friendswood, TX 77549 | Oil Operator | May 2025 |
| 26906 | Sidney E. Pinkston, Jr, Trustee | | Oil & Gas Operator | Apr 1980 |
| 26907 | Sidney Lanier | Midland, TX BADADDR | Oil & Gas Operator | Jan 1996 |
| 26908 | Sidwell Oil & Ga | | Oil & Gas Operator | May 1993 |
| 26909 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 26910 | Sidwell Operating Company, L.P. | Amarillo, TX 79105 | Oil & Gas Operator | May 2025 |
| 26911 | Sidwell Theodore R Jr | Thornville, OH 43076-0839-0839 | Oil & Gas Operator | Dec 1988 |
| 26912 | Sieg Energy, Inc. | Ottawa, KS 66067 | Oil Operator | Nov 2024 |
| 26913 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 26914 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 26915 | Siempre Energy Operating, LLC | Houston, TX 77094 | Oil Operator | May 2025 |
| 26916 | Siemsen Operating, LLC | Holyrood, KS 67450 | Oil Operator | Dec 2024 |
| 26917 | Sien Operating Company, LLC | San Antonio, TX 78209 | Oil Operator | May 2023 |
| 26918 | Sierra Blanca Operating Company | Cleburne, TX BADADDR | Oil & Gas Operator | May 1999 |
| 26919 | Sierra Drilling | | Oil Operator | Sep 1988 |
| 26920 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 26921 | Sierra Group, L.L.C. | San Angelo, TX 76904 | Oil & Gas Operator | May 2025 |
| 26922 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 26923 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 26924 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 26925 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 26926 | Sierra Minerals, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | May 2025 |
| 26927 | Sierra Oil Company | Fort Worth, TX 76106 | Oil & Gas Operator | May 2025 |
| 26928 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 26929 | Sierra Production Company | | Oil & Gas Operator | May 1986 |
| 26930 | Sierra Reserve Company | | Oil Operator | Dec 1985 |
| 26931 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 26932 | Sierra Resources, LLC | Houston, TX 77219 | Oil & Gas Operator | Aug 2021 |
| 26933 | Sierra Trading Corporation | | Oil & Gas Operator | Sep 1978 |
| 26934 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 26935 | Sigma Corporation | Charleston, WV 25301-2644 | Gas Operator | Dec 2021 |
| 26936 | Sigma Energy & Explor., Co LLC | Ozona, TX 76943 | Oil & Gas Operator | Feb 2010 |
| 26937 | Sigma Energy, LLC | | Oil Operator | Jan 2025 |
| 26938 | Sigma Exploration Corp., The | Dallas, TX 75230 | Oil & Gas Operator | Sep 1998 |
| 26939 | Sigma Oper & Develop Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 26940 | Sigmon Construction Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 26941 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 26942 | Signal Hill Company LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2024 |
| 26943 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 26944 | Signal Hill Operating LLC | | Oil & Gas Operator | Mar 2025 |
| 26945 | Signal Hill Petroleum Inc. | | Oil & Gas Operator | Mar 2025 |
| 26946 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | May 2025 |
| 26947 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 26948 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 26949 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 26950 | Signal, LLC | | Oil & Gas Operator | Mar 2025 |
| 26951 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 26952 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 26953 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 26954 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 26955 | Sikes, Arlas M. | Brownwood, TX 76801 | Oil & Gas Operator | May 2000 |
| 26956 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 26957 | Silent Stone Energy LLC | | Oil & Gas Operator | Feb 2025 |
| 26958 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 26959 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | May 2025 |
| 26960 | Silvco Energy, LLC | | Oil Operator | Apr 2014 |
| 26961 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 26962 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 26963 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | May 2025 |
| 26964 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |
| 26965 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 26966 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 26967 | Silver Exploration Company | | Oil & Gas Operator | Mar 2025 |
| 26968 | Silver Fox Oil & Gas LLC | Hebbronville, TX 78361 | Oil & Gas Operator | May 2025 |
| 26969 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 26970 | Silver Hill Energy Partners, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 26971 | Silver Mountain Energy LLC | | Oil & Gas Operator | Dec 2024 |
| 26972 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 26973 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 26974 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | May 2025 |
| 26975 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2025 |
| 26976 | Silver Petroleum Inc | | Gas Operator | Dec 2001 |
| 26977 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Feb 2025 |
| 26978 | Silver Rock Energy, LLC | Terrell, TX 75160 | Oil Operator | May 2025 |
| 26979 | Silver Run Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 26980 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 26981 | Silver Spike Energy Operating Of NM, LLC | Midland, TX 79701 | Oil Operator | Jul 2016 |
| 26982 | Silver Square Resources LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 26983 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 26984 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | May 2025 |
| 26985 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Feb 2025 |
| 26986 | Silver Thread Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2015 |
| 26987 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 26988 | Silverado Oil Inc | Greeley, CO 80631 | Oil Operator | Apr 2000 |
| 26989 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 26990 | Silverback Operating II, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2025 |
| 26991 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |
| 26992 | Silverbacq LLC | | Oil & Gas Operator | Mar 2025 |
| 26993 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 26994 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil & Gas Operator | May 2025 |
| 26995 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil Operator | May 2025 |
| 26996 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 26997 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 26998 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 26999 | Simasko Producti | | Oil Operator | Dec 1986 |
| 27000 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |