| Pima Energy LLC |
370945 |
| JKM Energy, LLC |
163645 |
| Prime Operating Co |
18099 |
| Wynn-Crosby Operating, LP |
370351 |
| J & J Service Inc |
11095 |
| Lynx Petroleum Consultants Inc |
13645 |
| Quatro Osos E&P, LLC |
372241 |
| Manzano LLC |
231429 |
| Legacy Reserves Operating, LP |
240974 |
| Basic Energy Services, LP |
246368 |
| Vanguard Operating, LLC |
258350 |
| Jalapeno Corporation |
26307 |
| Breck Operating Corp |
2799 |
| Bridwell Oil Co |
2832 |
| Burk Royalty Co., LTD. |
3053 |
| Burnett Oil Co Inc |
3080 |
| Ascent Energy, LLC. |
325830 |
| HPPC, Inc. |
371698 |
| Pogo Oil & Gas Operating, Inc |
372000 |
| Hilcorp Energy Company |
372171 |
| Upland Production Company |
305286 |
| Ray Westall Operating, Inc. |
119305 |
| Unitex Oil & Gas, L.L.C. |
373671 |
| Poco Resources LLC |
373121 |
| Grand Banks Energy Co |
155471 |
| Harvard Petroleum Company, LLC |
10155 |
| Cambrian Management LTD |
198688 |
| Smith & Marrs Inc |
20989 |
| Everquest Energy Corporation |
212929 |
| Chevron Midcontinent, L.P. |
241333 |
| BK Exploration Corp |
2433 |
| EOG Y Resources, Inc. |
25575 |
| Bopco, L.P. |
260737 |
| Chevron U S A Inc |
4323 |
| Devon Energy Production Company, LP |
6137 |
| GP II Energy Inc |
8359 |
| Apache Corporation |
873 |
| Great Western Drilling Co |
9338 |
| Marathon Oil Permian LLC |
372098 |
| Longfellow Energy, LP |
372210 |
| Remnant Oil Operating, LLC |
370922 |
| Colgate Operating, LLC |
371449 |
| Linn Operating, LLC. |
269324 |
| TLT SWD, LLC |
287481 |
| Rki Exploration & Production, LLC |
246289 |
| Hudson Oil Company Of Texas |
25111 |
| Bta Oil Producers, LLC |
260297 |
| George A Chase JR Dba G And C Service |
265378 |
| Lime Rock Resources II-A, L.P. |
277558 |
| Cross Timbers Energy, LLC |
298299 |
| Energyquest II, LLC |
305911 |
| Breitburn Operating LP |
370080 |
| Rover Operating, LLC |
371484 |
| Dugan Production Corp |
6515 |
| LLJ Ventures, LLC Dba Marker Oil & Gas |
372279 |
| Sahara Operating Co |
20077 |
| Resource Rock Services, LLC |
372144 |
| Saber Oil & Gas Ventures, LLC |
243978 |
| Ram Energy LLC |
309777 |
| Sellers&Fulton Oil LLC |
371978 |
| Rockcliff Operating New Mexico LLC |
371115 |
| EOG Resources Inc |
7377 |
| Chi Operating Inc |
4378 |
| Armstrong Energy Corp |
1092 |
| Texland Petroleum-Hobbs, LLC |
113315 |
| John H Hendrix Corp |
12024 |
| Sundown Energy LP |
232611 |
| V-F Petroleum Inc |
24010 |
| Forty Acres Energy, LLC |
371416 |
| XTO Energy, Inc |
5380 |
| Amtex Energy Inc |
785 |
| Trinity Environmental SWD I, L.L.C. |
371786 |
| Chisholm Energy Operating, LLC |
372137 |
| Mammoth Exploration, LLC |
372233 |
| Rim Operating, Inc. |
372497 |
| Special Energy Corp |
138008 |
| Mack Energy Corp |
13837 |
| Fulfer Oil & Cattle LLC |
141402 |
| Enervest Operating L.L.C. |
143199 |
| Mewbourne Oil Co |
14744 |
| Agave Energy Co |
147831 |
| Fasken Oil & Ranch LTD |
151416 |
| Murchison Oil & Gas Inc |
15363 |
| EOG M Resources, Inc. |
15445 |
| Occidental Permian LTD |
157984 |
| Cimarex Energy Co. Of Colorado |
162683 |
| Energen Resources Corporation |
162928 |
| Ridgeway Arizona Oil Corp. |
164557 |
| Oxy USA Inc |
16696 |
| Pecos River Op Inc |
17081 |
| Penroc Oil Corp |
17213 |
| E G L Resources Inc |
173413 |
| Premier Oil & Gas Inc |
17985 |
| Finley Resources Inc |
180387 |
| Cameron Oil & Gas Inc |
181109 |
| Scythian LTD |
181156 |
| Read & Stevens Inc |
18917 |
| Beach Exploration Inc |
1903 |
| Endeavor Energy Resources, LP |
190595 |
| Oxy USA WTP Limited Partnership |
192463 |
| Rubicon Oil & Gas, LLC |
194266 |
| Stephens & Johnson Op Co |
19958 |
| Snow Oil & Gas Inc |
21013 |
| Spindletop Oil & Gas Co. |
212092 |
| Southwest Royalties Inc |
21355 |
| Cimarex Energy Co. |
215099 |
| Aspen Operating Company LLC |
217598 |
| Conocophillips Company |
217817 |
| Buckeye Disposal, L.L.C. |
222759 |
| Finney Oil Company |
225437 |
| Matador Production Company |
228937 |
| Cog Operating LLC |
229137 |