| 201 | Holt Oil & Gas C | | Oil Operator | Sep 1984 |
| 202 | Holt, Carol | Independence, KS 67301 | Oil Operator | Feb 2025 |
| 203 | Holt, Roger | Cherryvale, KS 67335 | Gas Operator | Mar 2003 |
| 204 | Holtom, Bill, A General Partnership | Saint Paul, KS 66771 | Oil Operator | Jun 2024 |
| 205 | Holton Brothers | Canton, KS 67428 | Oil Operator | Apr 1990 |
| 206 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 207 | Hon R J Oil & Ga | | Oil Operator | Nov 1990 |
| 208 | Hondo Oil & Gas | Houston, TX 77042 | Oil & Gas Operator | Oct 1995 |
| 209 | Honey Oil Co | Wichita, KS 67226 | Oil & Gas Operator | Mar 2009 |
| 210 | Honey Well, LLC | Lenexa, KS 66219 | Oil Operator | May 2025 |
| 211 | Hoover Noble C | | Oil Operator | Nov 1992 |
| 212 | Hope Company, LLC | Longmont, CO 80502 | Gas Operator | Feb 2012 |
| 213 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 214 | Hoppe Oil & Gas | | Oil Operator | Nov 1992 |
| 215 | Hoppe Oil & Gas Co., Inc. | Wichita, KS 67202 | Oil Operator | Jul 1998 |
| 216 | Hopper Oil Co., Inc. | Winfield, KS 67156 | Oil Operator | Jun 2025 |
| 217 | Hopper Oil Compa | | Oil Operator | Sep 1988 |
| 218 | Horizon Oil & Ga | | Oil & Gas Operator | Jan 1992 |
| 219 | Horizontal Development & Production Inc | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2002 |
| 220 | Horner Richard R | | Gas Operator | May 1995 |
| 221 | Horseshoe Operating Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 222 | Horst Oil, LLC | Pittsburg, MO 65724 | Oil Operator | Dec 2009 |
| 223 | Horton Oil Company, Inc. | Independence, KS 67301 | Oil & Gas Operator | Jul 2000 |
| 224 | Horton, Jack | Independence, KS 67301 | Oil & Gas Operator | Aug 2015 |
| 225 | Horton, John | Sedan, KS 67361 | Oil & Gas Operator | Jun 2025 |
| 226 | House, Dustin | Shawnee, KS 66218 | Oil Operator | May 2025 |
| 227 | Housel John R Jr | | Oil Operator | Oct 1994 |
| 228 | Housel, Robert E. | Cherryvale, KS 67335 | Oil & Gas Operator | Dec 2003 |
| 229 | Houston Hydrolan | | Oil Operator | Jul 1984 |
| 230 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Oct 2025 |
| 231 | Howell Oil Compa | | Oil & Gas Operator | Aug 1995 |
| 232 | Howell Oil Company | Hutchinson, KS 67504 | Oil & Gas Operator | Jun 2025 |
| 233 | Hrbek, R.L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 234 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 235 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 236 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 237 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Oct 2025 |
| 238 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 239 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Feb 2025 |
| 240 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 241 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Jun 2025 |
| 242 | Hughes Drilling Co. | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 243 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Jun 2025 |
| 244 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 245 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 246 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 247 | Humerickhouse Oil, LLC | Ottawa, KS 66067 | Oil Operator | Jun 2025 |
| 248 | Humerickhouse, Donald L. | Ottawa, KS 66067 | Oil Operator | Dec 2009 |
| 249 | Hummingbird Oil, LLC | Sedan, KS 67361 | Oil Operator | Jun 2025 |
| 250 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 251 | Hunt Oil, LLC | Garnett, KS 66032 | Oil Operator | Jun 2025 |
| 252 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 253 | Hupfer Oil & Gas | Hays, KS 67601 | Oil & Gas Operator | Dec 1993 |
| 254 | Hupfer Operating, Inc. | Shawnee, KS 66203 | Oil & Gas Operator | Dec 2019 |
| 255 | Husain, Mrs. Shahnaz | Tulsa, OK 74136 | Oil Operator | Nov 1996 |
| 256 | Hutchinson Oil C | | Oil & Gas Operator | May 1995 |
| 257 | Hutchinson Oil Co. | | Oil & Gas Operator | Jun 2025 |
| 258 | Hutchison Jay Oi | | Oil Operator | Sep 1991 |
| 259 | Hutton Charles N | | Oil Operator | Dec 1994 |
| 260 | Hutton, Charles N., SR. | Iola, KS 66749 | Oil Operator | Nov 2007 |
| 261 | Hyde-Marrs, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1997 |