| Rank |
Company |
Revenue
($ millions) |
Assets |
| # 1 |
Occidental Petroleum Corporation |
25,956 |
75,036 |
| # 2 |
Schlumberger N.V. |
22,929 |
41,511 |
| # 3 |
EOG Resources, Inc. |
18,642 |
38,236 |
| # 4 |
Halliburton Company |
15,295 |
22,321 |
| # 5 |
Pioneer Natural Resources Company |
14,643 |
36,811 |
| # 6 |
Devon Energy Corporation |
12,206 |
21,025 |
| # 7 |
Ovintiv Inc. |
8,658 |
14,055 |
| # 8 |
Diamondback Energy, Inc. |
6,797 |
22,898 |
| # 9 |
Southwestern Energy Company |
6,667 |
11,848 |
| # 10 |
Continental Resources, Inc. |
5,719 |
18,591 |
| # 11 |
Chesapeake Energy Corporation |
5,549 |
11,009 |
| # 12 |
Marathon Oil Corporation |
5,467 |
16,994 |
| # 13 |
Par Pacific Holdings, Inc. |
4,710 |
2,570 |
| # 14 |
Antero Resources Corporation |
4,619 |
13,897 |
| # 15 |
Coterra Energy Inc. |
3,449 |
19,900 |
| # 16 |
EQT Corporation |
3,065 |
21,607 |
| # 17 |
Range Resources Corporation |
2,930 |
6,661 |
| # 18 |
SM Energy Company |
2,623 |
5,234 |
| # 19 |
Transocean Ltd (Switzerland) |
2,556 |
20,681 |
| # 20 |
Liberty Oilfield Services Inc. |
2,471 |
2,041 |
| # 21 |
Murphy Oil Corporation |
2,299 |
10,305 |
| # 22 |
Callon Petroleum Company |
2,045 |
5,548 |
| # 23 |
Nabors Industries Ltd. |
2,018 |
5,525 |
| # 24 |
California Resources Corporation |
1,889 |
3,846 |
| # 25 |
Oceaneering International, Inc. |
1,869 |
1,963 |
| # 26 |
PDC Energy, Inc. |
1,856 |
5,337 |
| # 27 |
Comstock Resources, Inc. |
1,851 |
4,668 |
| # 28 |
Matador Resources Company |
1,663 |
4,262 |
| # 29 |
Oasis Petroleum Inc. |
1,580 |
3,027 |
| # 30 |
Whiting Petroleum Corporation |
1,533 |
2,458 |
| # 31 |
CRESCENT ENERGY CO |
1,477 |
5,157 |
| # 32 |
NexTier Oilfield Solutions Inc. |
1,423 |
1,458 |
| # 33 |
Laredo Petroleum, Inc. |
1,394 |
2,552 |
| # 34 |
Helmerich & Payne, Inc. |
1,382 |
4,392 |
| # 35 |
Patterson-UTI Energy, Inc. |
1,357 |
2,958 |
| # 36 |
Kosmos Energy Ltd. |
1,332 |
4,941 |
| # 37 |
Denbury Inc. |
1,258 |
1,903 |
| # 38 |
Talos Energy, Inc. |
1,245 |
2,767 |
| # 39 |
Hess Midstream LP |
1,204 |
3,486 |
| # 40 |
Magnolia Oil & Gas Corporation |
1,078 |
1,747 |
| # 41 |
Centennial Resource Development, Inc. |
1,030 |
3,805 |
| # 42 |
Civitas Resources, Inc. |
931 |
6,741 |
| # 43 |
ProPetro Holding Corp. |
875 |
1,061 |
| # 44 |
RPC, Inc. |
865 |
864 |
| # 45 |
Expro Group Holdings N.V. |
826 |
1,855 |
| # 46 |
Noble Corporation plc |
770 |
2,073 |
| # 47 |
Select Energy Services, Inc. |
765 |
950 |
| # 48 |
CNX Resources Corporation |
757 |
8,101 |
| # 49 |
Berry Corporation (bry) |
701 |
1,456 |
| # 50 |
Helix Energy Solutions Group, Inc. |
675 |
2,326 |
| # 51 |
Superior Energy Services, Inc. |
649 |
1,200 |
| # 52 |
Unit Corporation |
639 |
629 |
| # 53 |
Ranger Oil Corporation |
579 |
1,577 |
| # 54 |
W&T Offshore, Inc. |
558 |
1,193 |
| # 55 |
Viper Energy Partners LP |
505 |
3,034 |
| # 56 |
Northern Oil and Gas, Inc. |
497 |
1,523 |
| # 57 |
Gran Tierra Energy Inc. |
474 |
1,189 |
| # 58 |
Core Laboratories N.V. |
470 |
581 |
| # 59 |
Earthstone Energy, Inc. |
420 |
1,556 |
| # 60 |
SilverBow Resorces, Inc. |
407 |
819 |
| # 61 |
Tetra Technologies, Inc. |
388 |
398 |
| # 62 |
Black Stone Minerals, L.P. |
359 |
1,248 |
| # 63 |
Nine Energy Service, Inc. |
349 |
382 |
| # 64 |
Amplify Energy Corp. |
343 |
455 |
| # 65 |
CSI Compressco LP |
304 |
722 |
| # 66 |
Ranger Energy Services, Inc. |
293 |
393 |
| # 67 |
Battalion Oil Corporation |
285 |
390 |
| # 68 |
U.S. Well Services, Inc. |
250 |
244 |
| # 69 |
Aris Water Solutions, Inc. |
229 |
1,127 |
| # 70 |
Mammoth Energy Services, Inc. |
229 |
721 |
| # 71 |
HighPeak Energy, Inc. |
220 |
819 |
| # 72 |
VAALCO Energy, Inc. |
199 |
263 |
| # 73 |
Ring Energy, Inc. |
196 |
684 |
| # 74 |
Riley Exploration Permian, Inc. |
185 |
396 |
| # 75 |
SandRidge Energy, Inc. |
169 |
353 |
| # 76 |
Brigham Minerals, Inc. |
161 |
821 |
| # 77 |
Vantage Drilling International |
158 |
699 |
| # 78 |
Kimbell Royalty Partners |
136 |
601 |
| # 79 |
NCS Multistage Holdings, Inc. |
119 |
142 |
| # 80 |
Dorchester Minerals, L.P. |
93 |
147 |
| # 81 |
Independence Contract Drilling, Inc. |
88 |
397 |
| # 82 |
Abraxas Petroleum Corporation |
79 |
130 |
| # 83 |
ENERGY 11, L.P. |
74 |
342 |
| # 84 |
Natural Gas Services Group, Inc. |
72 |
299 |
| # 85 |
Tellurian Inc. |
71 |
622 |
| # 86 |
Falcon Minerals Corporation |
68 |
262 |
| # 87 |
Evolution Petroleum Corporation, Inc. |
63 |
87 |
| # 88 |
ENERGY RESOURCES 12, L.P. |
58 |
201 |
| # 89 |
Evolve Transition Infrastructure LP |
51 |
261 |
| # 90 |
Epsilon Energy Ltd. |
42 |
99 |
| # 91 |
Ecoark Holdings, Inc. |
35 |
44 |
| # 92 |
PHX Minerals Inc. |
32 |
122 |
| # 93 |
Empire Petroleum Corp |
28 |
50 |
| # 94 |
Dawson Geophysical Company |
25 |
74 |
| # 95 |
Pedevco Corp. |
16 |
98 |
| # 96 |
Zion Oil & Gas Inc |
11 |
63 |
| # 97 |
RIDGEWOOD ENERGY O FUND LLC |
10 |
19 |
| # 98 |
EVERFLOW EASTERN PARTNERS LP |
10 |
44 |
| # 99 |
Reserve Petroleum Co |
9 |
33 |
| # 100 |
RIDGEWOOD ENERGY Y FUND LLC |
8 |
14 |