| Hardin-Rayes Unit O-1-15533 | Javelin Energy Partners Mgmt LLC only | Eagleville (Eagle Ford-1) | McMullen | 7 | 1.41M | 1M | Jun 2011 – Jul 2026 |
| Tarver - Hardin O-3-3866 | Radco Operations, L.P. only | Sour Lake | Hardin | 28 | 672K | 21 | Jan 1993 – Jul 2026 |
| Meek-Hardin 3A O-10-52220 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 639K | 689K | May 2019 – Jul 2026 |
| Meek-Hardin 3C O-10-52226 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 629K | 733K | May 2019 – Jul 2026 |
| Meek-Hardin 3B O-10-52225 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 538K | 649K | May 2019 – Jul 2026 |
| JW Hardin Unit 31-42 O-10-59958 | Langford & Brigham Operating LLC only | Spraberry (Trend Area) | Howard | 2 | 514K | 529K | Jun 2023 – Jul 2026 |
| Cessna, Adelia O-3-6243 | Jay Management Company, LLC only | Hardin | — | 1 | 273K | 446 | Jan 1993 – Jul 2026 |
| Finley, Gertrude O-3-12832 | Finley Oil Company, LLC only | Hardin | Liberty | 2 | 245K | 45.6K | Jan 1993 – Jul 2026 |
| Finley, G.& E. O-3-25283 | Hughes Oil Operating, LLC only | Hardin | — | 1 | 160K | 30.2K | Jan 2009 – Jul 2026 |
| Hardin Unit O-1-15828 | Callon (Eagle Ford) LLC only | Eagleville (Eagle Ford-1) | Frio | 4 | 128K | 381K | Jan 2012 – Feb 2022 |
| Daniel O-3-18007 | Crawford Hughes Operating Co. only | Hardin (Y-13B) | Liberty | 1 | 113K | 89.9K | Jan 1993 – Apr 2018 |
| WJ Green O-3-25846 | Hughes Oil Operating, LLC only | Hardin (Y-3) | Liberty | 1 | 93.7K | 10 | Mar 2012 – Jul 2026 |
| Buffum & Benning O-3-9160 | Caskids Operating Company only | Hardin, N. (Bintliff 7600) | Liberty | 3 | 85.5K | 238K | Jan 1993 – Jul 2026 |
| Cessna, A. E. O-3-1906 | Jay Management Company, LLC only | Hardin | — | 2 | 85.1K | 159 | Jan 1993 – Jul 2026 |
| Hardin-Johnston-Starnes O-14-821 | Kodiak Operating, LLC only | Panhandle Hutchinson County Fld. | Hutchinson | 26 | 84.9K | 251K | Jan 1993 – Jul 2026 |
| Rives, G. S. O-3-12759 | Jay Management Company, LLC only | Hardin (Y-12) | Liberty | 1 | 80.1K | 6.56K | Jan 1993 – Jul 2026 |
| Rives, S. O-3-16351 | Jay Management Company, LLC only | Hardin (Y-7) | Liberty | 1 | 76.9K | 5.84K | Jan 1993 – May 2025 |
| Rives, Ernest O-3-13435 | Hughes Oil Operating, LLC only | Hardin | Liberty | 1 | 75.9K | 47.4K | Jan 1993 – Jul 2026 |
| McClure, R. O. O-11-60430 | Hardin Energy Co., Inc. only | Sharon Ridge (Clear Fork) | Scurry | 3 | 67.4K | 80 | Jan 1993 – Jul 2026 |
| Barrett, W. J. O-3-25337 | Hughes Oil Operating, LLC only | Hardin, SW. (Davidson #2) | Liberty | 1 | 58.9K | 67K | Sep 2008 – Jul 2026 |
| Partlow Oil Unit No. 3 O-3-7745 | Odum Oil & Gas Co. only | Hardin | — | 2 | 56.3K | 15.4K | Jan 1993 – Jul 2026 |
| Partlow Oil Unit No. 1 O-3-7629 | Odum Oil & Gas Co. only | Hardin | — | 2 | 56.2K | 22.4K | Jan 1993 – Jul 2026 |
| Burney, O. L. O-11-63008 | Hardin Energy Co., Inc. only | Sharon Ridge (Clear Fork) | Scurry | 2 | 56.1K | 78 | Jan 1993 – Jul 2026 |
| Finley, W.T. O-3-25767 | Hughes Oil Operating, LLC only | Hardin (Y-3) | Liberty | 1 | 55.4K | 16.9K | May 2011 – Jul 2026 |
| Finley Unit O-3-24071 | Hughes Oil Operating, LLC only | Hardin | Liberty | 1 | 55K | 60.7K | Sep 2001 – Jul 2026 |
| Hardin, E. E. -A- O-13-4904 | Alfaro Oil & Gas only | Wichita County Regular | Wichita | 18 | 54.4K | 30 | Jan 1993 – Jul 2026 |
| Hardin-Rayes A1 O-1-20896 | Javelin Energy Partners Mgmt LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 54.3K | 42.5K | Sep 2022 – Jul 2026 |
| Dickie - Lenoir Unit O-8-25956 | Romac Oil Company, Inc. only | Harding Bros. (Miss.) | Stephens | 1 | 52.3K | 206K | Jan 1993 – Jun 2026 |
| Green O-3-18543 | Texas American Resources Company only | Hardin | Liberty | 1 | 47.2K | 369 | Jan 1993 – Jan 2001 |
| Simmons, Hardin O-10-34073 | Vin Fisher Operating, Inc. only | Fullerton (San Andres) | Andrews | 2 | 46.8K | 51.7K | Jan 1994 – Jul 2026 |
| Hardin County Oil Co. O-3-5467 | Rheaco Oil Company, Ltd. only | Sour Lake | Hardin | 14 | 43.8K | 22 | Jan 1993 – Jul 2026 |
| Richardson Oil Unit #3 O-3-7291 | Odum Oil & Gas Co. only | Hardin | — | 1 | 43.8K | 22.8K | Jan 1993 – Jul 2026 |
| Hardin '10A' O-10-43036 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 43.6K | 90.2K | Jul 2012 – Jul 2026 |
| Barrett, W J O-3-25039 | Hughes Oil Operating, LLC only | Hardin, SW. (Cook Mountain #1) | Liberty | 1 | 43.2K | 61.2K | Mar 2007 – Jul 2026 |
| Tiller, M. O-1-1456 | Hardin Energy Co., Inc. only | Salt Flat | Caldwell | 4 | 42.1K | 1.9K | Jan 1993 – Jul 2026 |
| Kirby (117 Hardin) O-3-10760 | Neches Transport Inc. only | Fisher (Wilcox Fifth) | — | 1 | 41.8K | 24K | Jan 1993 – Jul 2026 |
| Hardin "10" O-10-39511 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 1 | 41.5K | 39.4K | Apr 2009 – Jul 2026 |
| Barrett, W. J., Estate O-3-4907 | Hughes Oil Operating, LLC only | Hardin, SW. (Frazier Seg N) | Liberty | 2 | 41K | 58.1K | Jan 1993 – Jul 2026 |
| Finley, W. T., Est. O-3-9124 | Finley Oil Company, LLC only | Hardin | Liberty | 3 | 40.5K | 25 | Jan 1993 – Jul 2026 |
| Hardin O-11-65592 | Rogers, S. K. Oil, Inc. only | Clauene, North (Clear Fork) | Hockley | 1 | 39.3K | 877 | Jan 1993 – Jul 2026 |
| Tarver-Hardin O-3-3894 | Radco Operations only | Sour Lake | Hardin | 18 | 37.6K | 21 | Jan 1993 – Jul 2000 |
| Johnston Oil Unit No. 1 O-3-7851 | Odum Oil & Gas Co. only | Hardin | — | 2 | 36.9K | 3.3K | Jan 1993 – Jul 2026 |
| WT Finley (Smith) O-3-25228 | Hughes Oil Operating, LLC only | Hardin (Y-3) | Liberty | 1 | 36.5K | 41.9K | Jun 2008 – Jul 2026 |
| Hardin-Simmons Cre 3 O-10-48834 | Nesitor West Texas LLC only | Waha, W. (Consolidated Delaware) | Reeves | 1 | 34.8K | 461K | Sep 2016 – Jul 2026 |
| T M & K O-3-18694 | Crawford Hughes Operating Co. only | Hardin | Liberty | 1 | 34.3K | 75.3K | Jan 1993 – Sep 2019 |
| Hampton/Hardin Unit O-9-15277 | Cazar Energy Inc only | Millersview, W. (Camar Sd.) | Concho | 1 | 33K | 15.1K | Aug 2002 – Jul 2026 |
| Brownfield O-11-62799 | Hardin Energy Co., Inc. only | Sharon Ridge (Clear Fork) | Scurry | 5 | 31K | 78 | Jan 1993 – Jul 2026 |
| Partlow, W. D. O-3-7866 | Odum Oil & Gas Co. only | Hardin | — | 2 | 27.9K | 27.3K | Jan 1993 – Jul 2026 |
| Kirby /#117 Hardin/ O-3-7652 | Neches Transport Inc. only | Fisher (Wilcox First) | Tyler | 1 | 26.5K | 43.7K | Jan 1993 – Jul 2026 |
| Alliance Trust Co. O-11-62817 | Hardin Energy Co., Inc. only | Sharon Ridge (Clear Fork) | Scurry | 2 | 25.2K | 78 | Jan 1993 – Jul 2026 |