| Rank |
Company |
Revenue
($ millions) |
Assets |
| # 1 |
Schlumberger N.V. |
48,580 |
66,904 |
| # 2 |
Halliburton Company |
32,870 |
32,240 |
| # 3 |
EXPAND ENERGY Corp |
20,951 |
40,751 |
| # 4 |
Devon Energy Corporation |
19,566 |
50,637 |
| # 5 |
Occidental Petroleum Corporation |
19,312 |
56,259 |
| # 6 |
Anadarko Petroleum Corporation |
18,470 |
61,689 |
| # 7 |
EOG Resources Inc. |
18,035 |
34,763 |
| # 8 |
Apache Corporation |
13,672 |
55,952 |
| # 9 |
Marathon Oil Corporation |
11,258 |
36,011 |
| # 10 |
Transocean Ltd. |
9,174 |
28,413 |
| # 11 |
Nabors Industries Ltd. |
6,804 |
11,880 |
| # 12 |
Murphy Oil Corporation |
5,476 |
16,742 |
| # 13 |
Noble Energy Inc. |
5,101 |
22,553 |
| # 14 |
Pioneer Natural Resources Company |
5,055 |
14,926 |
| # 15 |
Roan Resources, Inc. |
4,983 |
16,424 |
| # 16 |
Regency Energy Partners LP |
4,951 |
17,103 |
| # 17 |
Continental Resources, Inc. |
4,802 |
15,145 |
| # 18 |
Valaris Ltd |
4,578 |
16,060 |
| # 19 |
Superior Energy Services, Inc. |
4,557 |
7,377 |
| # 20 |
California Resources Corp |
4,173 |
12,497 |
| # 21 |
Southwestern Energy Company |
4,038 |
14,925 |
| # 22 |
Helmerich & Payne, Inc. |
3,887 |
6,802 |
| # 23 |
CNX Resources Corp |
3,727 |
11,760 |
| # 24 |
Oceaneering International Inc. |
3,660 |
3,512 |
| # 25 |
WPX Energy, Inc. |
3,493 |
8,798 |
| # 26 |
QEP Resources, Inc. |
3,433 |
9,287 |
| # 27 |
Noble Corporation plc |
3,233 |
13,287 |
| # 28 |
Patterson-UTI Energy Inc. |
3,182 |
5,394 |
| # 29 |
Par Pacific Holdings Inc. |
3,108 |
741 |
| # 30 |
Whiting Holdings LLC |
3,085 |
14,020 |
| # 31 |
EP ENERGY LLC |
3,084 |
10,194 |
| # 32 |
EP Energy Corporation |
3,084 |
10,219 |
| # 33 |
ENERGY XXI LTD |
2,976 |
7,224 |
| # 34 |
Diamond Offshore Drilling Inc. |
2,815 |
8,021 |
| # 35 |
ANTERO RESOURCES Corp |
2,721 |
11,573 |
| # 36 |
Range Resources Corporation |
2,712 |
8,747 |
| # 37 |
Concho Resources Inc. |
2,683 |
11,800 |
| # 38 |
SM Energy Co |
2,522 |
6,517 |
| # 39 |
EQT Corp |
2,470 |
12,065 |
| # 40 |
Denbury Inc. |
2,435 |
12,728 |
| # 41 |
Cimarex Energy Co |
2,424 |
8,725 |
| # 42 |
RPC Inc. |
2,337 |
1,759 |
| # 43 |
Markwest Energy Partners LP |
2,176 |
10,981 |
| # 44 |
Coterra Energy Inc. |
2,173 |
5,438 |
| # 45 |
Semgroup Corporation |
2,123 |
2,590 |
| # 46 |
SEVENTY SEVEN ENERGY INC. |
2,081 |
2,313 |
| # 47 |
WILLBROS GROUP, INC.NEW |
2,027 |
692 |
| # 48 |
PARAGON OFFSHORE PLC |
1,994 |
3,253 |
| # 49 |
Rowan Companies plc |
1,824 |
8,411 |
| # 50 |
Energen Corp |
1,677 |
6,138 |
| # 51 |
Unit Corporation |
1,573 |
4,474 |
| # 52 |
SandRidge Energy Inc. |
1,559 |
7,259 |
| # 53 |
Basic Energy Services, Inc. |
1,491 |
1,597 |
| # 54 |
Chord Energy Corp |
1,476 |
5,938 |
| # 55 |
Breitburn Energy Partners LP |
1,430 |
7,638 |
| # 56 |
Key Energy Services, Inc. |
1,427 |
2,333 |
| # 57 |
Carrizo Oil & Gas, Inc. |
1,395 |
2,981 |
| # 58 |
Exco Resources Inc |
1,315 |
2,357 |
| # 59 |
ROSETTA RESOURCES INC. |
1,305 |
4,251 |
| # 60 |
Atwood Oceanics Inc |
1,241 |
4,550 |
| # 61 |
Ultra Petroleum Corp. |
1,230 |
4,226 |
| # 62 |
C&J Energy Services Inc |
1,187 |
1,613 |
| # 63 |
SAMSON RESOURCES CORP |
1,180 |
5,608 |
| # 64 |
Expro Group Holdings N.V. |
1,153 |
1,759 |
| # 65 |
Battalion Oil Corporation |
1,148 |
6,434 |
| # 66 |
Helix Energy Solutions Group Inc. |
1,107 |
2,701 |
| # 67 |
Core Laboratories N.V. |
1,085 |
676 |
| # 68 |
Tetra Technologies Inc. |
1,078 |
2,068 |
| # 69 |
Pioneer Energy Services Corp. |
1,055 |
1,172 |
| # 70 |
Parker Drilling Company |
969 |
1,521 |
| # 71 |
W&T Offshore Inc. |
949 |
2,709 |
| # 72 |
Hercules Offshore Inc |
900 |
2,002 |
| # 73 |
MEMORIAL RESOURCE DEVELOPMENT CORP. |
899 |
4,594 |
| # 74 |
Kosmos Energy Ltd. |
883 |
2,973 |
| # 75 |
Vantage Drilling Co |
876 |
3,530 |
| # 76 |
PDC Energy, Inc. |
856 |
2,341 |
| # 77 |
Sanchez Energy Corp |
803 |
3,075 |
| # 78 |
Stone Energy Corp |
796 |
3,019 |
| # 79 |
Amplify Energy Corp. |
794 |
2,476 |
| # 80 |
Vital Energy, Inc. |
794 |
3,933 |
| # 81 |
GRIZZLY ENERGY, LLC |
788 |
3,794 |
| # 82 |
Titan Energy, LLC |
686 |
2,728 |
| # 83 |
Chaparral Energy, Inc. |
682 |
2,832 |
| # 84 |
Gulfport Energy Corporation |
671 |
3,632 |
| # 85 |
Ranger Oil Corporation |
637 |
2,226 |
| # 86 |
ALTA MESA HOLDINGS, LP |
616 |
918 |
| # 87 |
Northern Oil and Gas Inc. |
595 |
2,027 |
| # 88 |
Triangle Petroleum Corp |
573 |
1,655 |
| # 89 |
Quicksilver Resources Inc |
569 |
1,214 |
| # 90 |
TRANSOCEAN PARTNERS LLC |
567 |
2,632 |
| # 91 |
Gran Tierra Energy Inc. |
562 |
1,714 |
| # 92 |
Civitas Resources Inc. |
559 |
2,006 |
| # 93 |
Comstock Resources Inc. |
555 |
2,274 |
| # 94 |
SilverBow Resorces Inc. |
549 |
2,173 |
| # 95 |
Nuverra Environmental Solutions, Inc. |
536 |
872 |
| # 96 |
LEGACY RESERVES LP |
532 |
1,899 |
| # 97 |
Ion Geophysical Corporation |
510 |
617 |
| # 98 |
Diamondback Energy, Inc. |
496 |
3,095 |
| # 99 |
Amplify Energy Corp. |
494 |
2,931 |
| # 100 |
Bill Barrett Corp |
472 |
2,244 |