| 3201 | Opef Partnership, A General Partnership | Overland Park, KS 66221 | Oil Operator | Dec 2011 |
| 3202 | Orca Operating Company LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 3203 | Oryx Energy Comp | | Oil & Gas Operator | Apr 1991 |
| 3204 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 3205 | Osage Energy LLC | Colony, KS 66015 | Oil Operator | Nov 2023 |
| 3206 | Osage Resources, LLC | Wichita, KS 67202 | Oil & Gas Operator | Aug 2024 |
| 3207 | Osborn Energy, L.L.C. | Bucyrus, KS 66013 | Oil & Gas Operator | Jul 2017 |
| 3208 | Osborn Heirs Com | | Oil & Gas Operator | May 1995 |
| 3209 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2024 |
| 3210 | Osborn Oil & Gas | | Oil & Gas Operator | Jun 1991 |
| 3211 | Osci Oil And Gas, Inc. | Parker, KS 66072 | Oil Operator | Jun 1998 |
| 3212 | Oswego Oil & Gas | | Oil & Gas Operator | Jun 1984 |
| 3213 | Outback Oil, Inc. | Pratt, KS 67124 | Gas Operator | Sep 2019 |
| 3214 | Outlaw Well Service LLC | Hays, KS 67601 | Oil Operator | Oct 2024 |
| 3215 | Overland Exploration Company | | Oil Operator | Sep 2024 |
| 3216 | Owen'S Pumping Service | | Oil Operator | Dec 2024 |
| 3217 | Owen, Matthew | Hamilton, KS 66853 | Oil Operator | Sep 2016 |
| 3218 | Owens Oil | | Oil Operator | Dec 2000 |
| 3219 | Owens Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2008 |
| 3220 | Owens Oil Company, LLC | Yates Center, KS 66783 | Oil Operator | Dec 2024 |
| 3221 | Owens Petroleum | | Oil Operator | May 2006 |
| 3222 | Owens Petroleum LLC | Yates Center, KS 66783 | Oil & Gas Operator | Dec 2024 |
| 3223 | Owi Operating Co. LC | Ottawa, KS 66067 | Oil & Gas Operator | Dec 2009 |
| 3224 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2025 |
| 3225 | Oxbow Oil Company,A Kansas General Partnership | Grenola, KS 67346 | Oil Operator | Apr 2015 |
| 3226 | Oxford Explorati | | Oil & Gas Operator | Mar 1993 |
| 3227 | Oxford Exploration | | Oil Operator | Apr 1988 |
| 3228 | Oxy USA | | Oil Operator | Apr 1992 |
| 3229 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 3230 | Ozark Enterprise | | Oil Operator | Nov 1990 |
| 3231 | P & C Petroleum, LLC | Shawnee, KS 66226 | Oil Operator | Oct 2024 |
| 3232 | P & M Energy, A General Partnership | Johnson, KS 67855 | Gas Operator | Sep 2003 |
| 3233 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Dec 2024 |
| 3234 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 3235 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 3236 | P I C Inc | Ponca City, OK 74602 | Oil & Gas Operator | Jan 2013 |
| 3237 | P J Oil Co. | | Oil Operator | Dec 2024 |
| 3238 | P.M. Petroleum | | Oil Operator | Mar 1998 |
| 3239 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 3240 | P3 Production | | Oil Operator | Dec 2024 |
| 3241 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 3242 | Packard Energy LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2024 |
| 3243 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 3244 | Packard, Lynn | Medicine Lodge, KS | Oil & Gas Operator | Dec 2024 |
| 3245 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Dec 2024 |
| 3246 | Padgett Oil Inc. | Sedan, KS 67361 | Oil Operator | May 2006 |
| 3247 | Painter Oil Comp | | Oil & Gas Operator | Jul 1993 |
| 3248 | Palmer Engineering, Inc. | Luray, KS 67649 | Gas Operator | Mar 2000 |
| 3249 | Palmer Oil, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Dec 2024 |
| 3250 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 3251 | Palomino Petroleum | Newton, KS 67114 | Oil Operator | Oct 2003 |
| 3252 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Dec 2024 |
| 3253 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2025 |
| 3254 | Panaco, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2024 |
| 3255 | Panada Exploration, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1996 |
| 3256 | Pancanadian Petr | | Oil Operator | Aug 1990 |
| 3257 | Panhandle Easter | | Gas Operator | Dec 1986 |
| 3258 | Panhandle Petrol | | Oil Operator | Jun 1987 |
| 3259 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2025 |
| 3260 | Par Petroleum In | | Oil & Gas Operator | Jun 1993 |
| 3261 | Par Petroleum, Inc. | Liberal, KS 67901 | Gas Operator | Dec 2009 |
| 3262 | Par, Inc. | Oklahoma City, OK 73111 | Oil Operator | May 2016 |
| 3263 | Paradigm Energy LLC | Lenexa, KS 66227 | Oil & Gas Operator | Dec 2024 |
| 3264 | Paradise Creek Oil & Gas | Plainville, KS 67663 | Oil Operator | Dec 2024 |
| 3265 | Paramount Enterprises Inc | Hays, KS 67601 | Oil Operator | Aug 2000 |
| 3266 | Pardee Production Co. | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2021 |
| 3267 | Parker & Parsley | | Oil & Gas Operator | Dec 1996 |
| 3268 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 3269 | Parker Trucking And Assoc. | Independence, MO 64052 | Oil Operator | Aug 1996 |
| 3270 | Parrish Corporat | | Oil & Gas Operator | Oct 1994 |
| 3271 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jun 2002 |
| 3272 | Parten, Kenneth N. | St John, KS 67576 | Oil & Gas Operator | May 2009 |
| 3273 | Partners In Crude, Inc. | Ponca City, OK 74602 | Oil & Gas Operator | Dec 1997 |
| 3274 | Partners Petrole | | Oil Operator | Oct 1992 |
| 3275 | Parwest Land Exploration, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2025 |
| 3276 | Pate-Dombaugh Pe | | Oil Operator | Sep 1991 |
| 3277 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 3278 | Patrick Development Corporation | Leawood, KS 66206 | Oil Operator | Dec 2024 |
| 3279 | Patrick R J Oper | | Oil & Gas Operator | Jan 1995 |
| 3280 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 3281 | Patterson Jerry | | Oil Operator | Jan 1995 |
| 3282 | Patterson Operations LLC | Wichita, KS 67228 | Oil Operator | Dec 2024 |
| 3283 | Patterson Production Co. | Phillipsburg, KS 67661 | Oil Operator | Jul 1998 |
| 3284 | Patteson Brother | | Oil Operator | Feb 1990 |
| 3285 | Patteson Oil | | Oil Operator | Dec 2009 |
| 3286 | Patteson Oil, A General Partnership | Moline, KS 67353 | Oil Operator | Oct 2024 |
| 3287 | Patteson, Thomas Wade | Moline, KS 67353 | Oil Operator | Dec 2024 |
| 3288 | Patteson-Sheel O | | Oil Operator | Oct 1990 |
| 3289 | Pattie Creek Oil | | Oil Operator | May 1995 |
| 3290 | Pattie Creek Oil Company | Madison, KS 66860 | Oil Operator | Feb 2000 |
| 3291 | Patton Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 3292 | Patton Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2007 |
| 3293 | Patty Creek Oil LLC | Emporia, KS 66801 | Oil Operator | Dec 2024 |
| 3294 | Paul Bowman Oil | | Oil Operator | Jul 2000 |
| 3295 | Paul Bowman Oil Trust | Codell, KS 67663 | Oil Operator | Dec 2024 |
| 3296 | Pauley Oil | | Oil Operator | Dec 2024 |
| 3297 | Paulsen Petroleu | | Oil Operator | Feb 1994 |
| 3298 | Pawnee Oil, LLC | Overland Park, KS 66221 | Oil Operator | Jun 2024 |
| 3299 | Paxco, Inc. | Hays, KS 67601 | Oil & Gas Operator | Dec 2024 |
| 3300 | PB Oil Company | Vernon, TX 76385 | Oil & Gas Operator | Oct 2023 |