| HILCORP ENERGY COMPANY | 11,631 | 12,226 |
| Spur Energy Partners LLC | 2,726 | 3,132 |
| SIMCOE LLC | 2,288 | 2,372 |
| APACHE CORPORATION | 2,233 | 3,223 |
| OXY USA INC | 1,726 | 3,356 |
| EOG RESOURCES INC | 1,559 | 5,633 |
| MorningStar Operating LLC | 1,403 | 1,593 |
| LOGOS OPERATING, LLC | 1,202 | 1,304 |
| MEWBOURNE OIL CO | 1,193 | 3,160 |
| SOUTHWEST ROYALTIES INC | 1,084 | 1,279 |
| DEVON ENERGY PRODUCTION COMPANY, LP | 1,069 | 3,837 |
| DUGAN PRODUCTION CORP | 968 | 1,412 |
| COG OPERATING LLC | 927 | 3,018 |
| Maverick Permian LLC | 882 | 1,008 |
| ENDURING RESOURCES, LLC | 868 | 1,003 |
| Wapiti Operating, LLC | 845 | 856 |
| FAE II Operating LLC | 705 | 755 |
| Empire New Mexico LLC | 573 | 846 |
| MATADOR PRODUCTION COMPANY | 555 | 2,010 |
| LH Operating, LLC | 545 | 549 |
| CROSS TIMBERS ENERGY, LLC | 540 | 595 |
| RILEY PERMIAN OPERATING COMPANY, LLC | 513 | 661 |
| OCCIDENTAL PERMIAN LTD | 509 | 864 |
| EPIC ENERGY, L.L.C. | 460 | 503 |
| IACX Production LLC | 449 | 450 |
| TEAM OPERATING, L.L.C. | 441 | 517 |
| XTO PERMIAN OPERATING LLC. | 429 | 1,525 |
| BXP Operating, LLC | 413 | 475 |
| Solis Partners, L.L.C. | 407 | 428 |
| DJR OPERATING, LLC | 401 | 908 |
| High River Resources Operating, LLC | 368 | 371 |
| RAYBAW Operating, LLC | 365 | 379 |
| Acacia Operating Company, LLC | 360 | 393 |
| Silverback Operating II, LLC | 335 | 555 |
| OLEUM Energy LLC | 334 | 334 |
| Extex Operating Company | 323 | 345 |
| CHEVRON U S A INC | 316 | 1,974 |
| RIDGEWAY ARIZONA OIL CORP. | 307 | 421 |
| Permian Resources Operating, LLC | 286 | 998 |
| HARVARD PETROLEUM COMPANY, LLC | 283 | 333 |
| MACK ENERGY CORP | 282 | 1,163 |
| CIMAREX ENERGY CO. OF COLORADO | 263 | 1,309 |
| J R OIL, LTD. CO. | 255 | 293 |
| XTO ENERGY, INC | 243 | 1,319 |
| G and C Operating, LLC | 234 | 242 |
| ADVANCED WIRELESS COMMUNICATIONS, L.L.C. | 231 | 235 |
| CIMAREX ENERGY CO. | 229 | 745 |
| STEPHENS & JOHNSON OP CO | 229 | 289 |
| BURNETT OIL CO INC | 227 | 365 |
| MARATHON OIL PERMIAN LLC | 221 | 746 |