Rank |
Company |
Revenue ($ millions) |
Assets |
# 1 |
Schlumberger N.V. |
35,475 |
68,005 |
# 2 |
Halliburton Company |
23,633 |
36,942 |
# 3 |
Devon Energy Corporation |
13,145 |
29,532 |
# 4 |
EXPAND ENERGY Corp |
12,764 |
17,357 |
# 5 |
Occidental Petroleum Corporation |
12,480 |
43,437 |
# 6 |
EOG Resources Inc. |
8,757 |
26,975 |
# 7 |
Anadarko Petroleum Corporation |
8,698 |
46,414 |
# 8 |
Transocean Ltd. |
7,386 |
26,329 |
# 9 |
Apache Corporation |
6,366 |
18,842 |
# 10 |
Marathon Oil Corporation |
5,861 |
32,311 |
# 11 |
Pioneer Natural Resources Company |
4,825 |
15,154 |
# 12 |
Valaris Ltd |
4,063 |
13,637 |
# 13 |
ANTERO RESOURCES Corp |
3,955 |
14,155 |
# 14 |
Nabors Industries Ltd. |
3,864 |
9,538 |
# 15 |
Noble Corporation plc |
3,352 |
12,892 |
# 16 |
Southwestern Energy Company |
3,133 |
8,110 |
# 17 |
Noble Energy Inc. |
3,133 |
24,196 |
# 18 |
CNX Resources Corp |
3,114 |
10,930 |
# 19 |
Oceaneering International Inc. |
3,063 |
3,430 |
# 20 |
Murphy Oil Corporation |
3,033 |
11,494 |
# 21 |
Roan Resources, Inc. |
2,883 |
9,977 |
# 22 |
Superior Energy Services, Inc. |
2,775 |
4,914 |
# 23 |
Continental Resources, Inc. |
2,680 |
14,920 |
# 24 |
Helmerich & Payne, Inc. |
2,597 |
7,130 |
# 25 |
Diamond Offshore Drilling Inc. |
2,419 |
7,165 |
# 26 |
California Resources Corp |
2,403 |
7,053 |
# 27 |
EQT Corp |
2,340 |
13,976 |
# 28 |
Rowan Companies plc |
2,137 |
8,347 |
# 29 |
Par Pacific Holdings Inc. |
2,066 |
892 |
# 30 |
Whiting Holdings LLC |
2,051 |
11,389 |
# 31 |
QEP Resources, Inc. |
2,019 |
8,426 |
# 32 |
EP ENERGY LLC |
1,908 |
5,828 |
# 33 |
EP Energy Corporation |
1,908 |
5,833 |
# 34 |
Patterson-UTI Energy Inc. |
1,891 |
4,533 |
# 35 |
WPX Energy, Inc. |
1,888 |
8,350 |
# 36 |
Concho Resources Inc. |
1,804 |
12,642 |
# 37 |
C&J Energy Services, Inc |
1,749 |
2,233 |
# 38 |
ENERGY XXI LTD |
1,729 |
1,764 |
# 39 |
Range Resources Corporation |
1,598 |
6,900 |
# 40 |
SM Energy Co |
1,557 |
5,622 |
# 41 |
PARAGON OFFSHORE PLC |
1,492 |
2,384 |
# 42 |
Semgroup Corporation |
1,455 |
2,871 |
# 43 |
Cimarex Energy Co |
1,453 |
5,243 |
# 44 |
Coterra Energy Inc. |
1,357 |
5,262 |
# 45 |
Atwood Oceanics Inc |
1,352 |
4,748 |
# 46 |
RPC Inc. |
1,264 |
1,237 |
# 47 |
Denbury Inc. |
1,258 |
5,920 |
# 48 |
SEVENTY SEVEN ENERGY INC. |
1,131 |
1,903 |
# 49 |
Tetra Technologies Inc. |
1,130 |
1,656 |
# 50 |
Breitburn Energy Partners LP |
1,109 |
4,872 |
# 51 |
Expro Group Holdings N.V. |
975 |
1,727 |
# 52 |
WILLBROS GROUP, INC.NEW |
909 |
446 |
# 53 |
Energen Corp |
905 |
4,614 |
# 54 |
Unit Corporation |
854 |
2,809 |
# 55 |
Ultra Petroleum Corp. |
839 |
971 |
# 56 |
Basic Energy Services, Inc. |
806 |
1,161 |
# 57 |
Core Laboratories N.V. |
798 |
625 |
# 58 |
Key Energy Services, Inc. |
792 |
1,328 |
# 59 |
Chord Energy Corp |
790 |
5,649 |
# 60 |
Vantage Drilling International |
772 |
3,332 |
# 61 |
SandRidge Energy Inc. |
769 |
2,991 |
# 62 |
Atlas Energy Group, LLC |
753 |
1,918 |
# 63 |
Titan Energy, LLC |
740 |
1,731 |
# 64 |
MEMORIAL RESOURCE DEVELOPMENT CORP. |
732 |
5,083 |
# 65 |
Parker Drilling Company |
712 |
1,377 |
# 66 |
Gulfport Energy Corporation |
709 |
3,335 |
# 67 |
Helix Energy Solutions Group Inc. |
696 |
2,412 |
# 68 |
Vital Energy, Inc. |
607 |
1,813 |
# 69 |
PDC Energy, Inc. |
595 |
2,371 |
# 70 |
TRANSOCEAN PARTNERS LLC |
580 |
2,231 |
# 71 |
GRIZZLY ENERGY, LLC |
567 |
2,709 |
# 72 |
Battalion Oil Corporation |
550 |
3,459 |
# 73 |
Stone Energy Corp |
545 |
1,410 |
# 74 |
Pioneer Energy Services Corp. |
541 |
830 |
# 75 |
W&T Offshore Inc. |
507 |
1,208 |
# 76 |
Rice Energy Inc |
502 |
3,971 |
# 77 |
Sanchez Energy Corp |
476 |
1,542 |
# 78 |
Kosmos Energy Ltd. |
472 |
3,203 |
# 79 |
CSI Compressco LP |
458 |
980 |
# 80 |
Diamondback Energy, Inc. |
447 |
2,758 |
# 81 |
ALTA MESA HOLDINGS, LP |
434 |
723 |
# 82 |
Carrizo Oil & Gas, Inc. |
429 |
2,027 |
# 83 |
Black Stone Minerals, L.P. |
393 |
1,061 |
# 84 |
Amplify Energy Corp. |
365 |
679 |
# 85 |
Amplify Energy Corp. |
358 |
2,906 |
# 86 |
Triangle Petroleum Corp |
358 |
753 |
# 87 |
Nuverra Environmental Solutions, Inc. |
357 |
531 |
# 88 |
LEGACY RESERVES LP |
339 |
1,626 |
# 89 |
SABINE OIL & GAS CORP |
337 |
798 |
# 90 |
Exco Resources Inc |
328 |
954 |
# 91 |
Chaparral Energy, Inc. |
324 |
1,205 |
# 92 |
Matador Resources Co |
316 |
1,141 |
# 93 |
Ranger Oil Corporation |
305 |
518 |
# 94 |
Civitas Resources Inc. |
293 |
1,273 |
# 95 |
RSP Permian Inc |
284 |
2,980 |
# 96 |
Gran Tierra Energy Inc. |
276 |
1,146 |
# 97 |
Northern Oil and Gas Inc. |
275 |
734 |
# 98 |
Parsley Energy, Inc. |
266 |
2,514 |
# 99 |
Montage Resources Corporation |
255 |
1,266 |
# 100 |
Comstock Resources Inc. |
252 |
1,196 |