| 1 | H2ox Operating LLC | | Oil Operator | Jan 2024 |
| 2 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 3 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 4 | Hargraves Elston | Ponca City, OK 74604 | Oil & Gas Operator | Jul 2003 |
| 5 | Hargus Curtis | Macomb, OK 74852-8508 | Oil Operator | May 2017 |
| 6 | Hargus Irrevocable Trust | Tecumseh, OK 74873-0590 | Oil Operator | Apr 2014 |
| 7 | Harold G Raper Family Trust | Mansfield, TX 76063-1667 | Oil Operator | May 2023 |
| 8 | Harp Peggy A | Seminole, OK 74868-2284 | Oil & Gas Operator | Jul 2023 |
| 9 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 10 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 11 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 12 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 13 | Heller, Phillip & Charlene | Columbia, MO 65201 | Oil & Gas Operator | Jan 2024 |
| 14 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 15 | Hembree Alva | Oklahoma City, OK 73151-9145 | Oil & Gas Operator | Jun 2016 |
| 16 | Hembree Brit W | Shawnee, OK 74804-1725 | Oil & Gas Operator | Sep 2023 |
| 17 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 18 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 19 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 20 | High Energy | Cushing, OK 74023-1762 | Oil & Gas Operator | Jan 2024 |
| 21 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 22 | Hill Oil Company Inc | | Oil & Gas Operator | Dec 2023 |
| 23 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 24 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 25 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 26 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Dec 2023 |
| 27 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 28 | Hotulke Construction LLC | | Oil & Gas Operator | Dec 2023 |
| 29 | HP Operating LLC | | Oil Operator | Dec 2023 |
| 30 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 31 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 32 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |