Largest oil and gas companies by market cap: 100 companies with a combined market value of $4.040 T. Exxon Mobil Corporation (XOM) leads at $687.34 B. Petroleum refiners, crude producers, and oilfield services companies ranked by market value. Rankings update as fresh market data lands; click any company for its financial statements, charts, and SEC filing history.
| Rank | Company | Industry | Market Cap |
|---|---|---|---|
| 1 | Petroleum Refining | $687.34 B | |
| 2 | Crude Petroleum & Natural Gas | $565.69 B | |
| 3 | Petroleum Refining | $420.09 B | |
| 4 | Crude Petroleum & Natural Gas | $195.01 B | |
| 5 | Crude Petroleum & Natural Gas | $174.77 B | |
| 6 | Petroleum Refining | $162.12 B | |
| 7 | PPetróleo Brasileiro S.A. - PetrobrasPBR | Crude Petroleum & Natural Gas | $115.97 B |
| 8 | Petroleum Refining | $106.91 B | |
| 9 | Petroleum Refining | $105.90 B | |
| 10 | Crude Petroleum & Natural Gas | $102.47 B | |
| 11 | Petroleum Refining | $101.69 B | |
| 12 | Petroleum Refining | $97.02 B | |
| 13 | Petroleum Refining | $96.77 B | |
| 14 | Petroleum Refining | $83.34 B | |
| 15 | Crude Petroleum & Natural Gas | $78.46 B | |
| 16 | Oil & Gas Field Services, NEC | $75.59 B | |
| 17 | Petroleum Refining | $61.59 B | |
| 18 | Crude Petroleum & Natural Gas | $57.03 B | |
| 19 | Crude Petroleum & Natural Gas | $52.55 B | |
| 20 | Crude Petroleum & Natural Gas | $50.91 B | |
| 21 | Oil & Gas Field Machinery & Equipment | $47.89 B | |
| 22 | Crude Petroleum & Natural Gas | $47.42 B | |
| 23 | Crude Petroleum & Natural Gas | $40.06 B | |
| 24 | Crude Petroleum & Natural Gas | $31.85 B | |
| 25 | Crude Petroleum & Natural Gas | $30.38 B | |
| 26 | Oil & Gas Field Exploration Services | $27.94 B | |
| 27 | Oil & Gas Field Services, NEC | $26.74 B | |
| 28 | Oil & Gas Field Machinery & Equipment | $25.33 B | |
| 29 | Crude Petroleum & Natural Gas | $24.72 B | |
| 30 | Crude Petroleum & Natural Gas | $20.58 B | |
| 31 | PPermian Resources CorporationPR | Crude Petroleum & Natural Gas | $18.22 B |
| 32 | OOvintiv Inc.OVV | Crude Petroleum & Natural Gas | $17.43 B |
| 33 | VViper Energy, Inc.VNOM | Crude Petroleum & Natural Gas | $16.23 B |
| 34 | Crude Petroleum & Natural Gas | $15.90 B | |
| 35 | Petroleum Refining | $15.21 B | |
| 36 | Crude Petroleum & Natural Gas | $11.83 B | |
| 37 | Crude Petroleum & Natural Gas | $11.27 B | |
| 38 | Petroleum Refining | $8.94 B | |
| 39 | Crude Petroleum & Natural Gas | $8.18 B | |
| 40 | Crude Petroleum & Natural Gas | $7.24 B | |
| 41 | Crude Petroleum & Natural Gas | $7.10 B | |
| 42 | Crude Petroleum & Natural Gas | $7.00 B | |
| 43 | Drilling Oil & Gas Wells | $6.36 B | |
| 44 | Oil & Gas Field Machinery & Equipment | $6.24 B | |
| 45 | MMatador Resources CompanyMTDR | Crude Petroleum & Natural Gas | $6.19 B |
| 46 | WWeatherford International plcWFRD | Oil & Gas Field Machinery & Equipment | $5.92 B |
| 47 | Drilling Oil & Gas Wells | $5.69 B | |
| 48 | Drilling Oil & Gas Wells | $5.35 B | |
| 49 | Crude Petroleum & Natural Gas | $5.21 B | |
| 50 | Crude Petroleum & Natural Gas | $4.99 B | |
| 51 | SSolaris Energy Infrastructure, Inc.SEI | Oil & Gas Field Machinery & Equipment | $4.84 B |
| 52 | LLiberty Energy Inc.LBRT | Oil & Gas Field Services, NEC | $4.75 B |
| 53 | Petroleum Refining | $4.75 B | |
| 54 | Miscellaneous Products of Petroleum & Coal | $4.57 B | |
| 55 | Oil & Gas Field Machinery & Equipment | $4.36 B | |
| 56 | MMagnolia Oil & Gas CorporationMGY | Crude Petroleum & Natural Gas | $4.35 B |
| 57 | Crude Petroleum & Natural Gas | $4.05 B | |
| 58 | CCVR Energy, Inc.CVI | Petroleum Refining | $4.01 B |
| 59 | CComstock Resources, Inc.CRK | Crude Petroleum & Natural Gas | $3.91 B |
| 60 | HHess Midstream LPHESM | Crude Petroleum & Natural Gas | $3.89 B |
| 61 | Petroleum Refining | $3.83 B | |
| 62 | Drilling Oil & Gas Wells | $3.78 B | |
| 63 | CCrescent Energy CompanyCRGY | Crude Petroleum & Natural Gas | $3.68 B |
| 64 | WWaterBridge Infrastructure LLCWBI | Oil & Gas Field Services, NEC | $3.61 B |
| 65 | Oil & Gas Field Services, NEC | $3.54 B | |
| 66 | Petroleum Refining | $3.48 B | |
| 67 | Drilling Oil & Gas Wells | $3.47 B | |
| 68 | Petroleum Refining | $3.45 B | |
| 69 | PPar Pacific Holdings, Inc.PARR | Crude Petroleum & Natural Gas | $3.44 B |
| 70 | OOceaneering International, Inc.OII | Oil & Gas Field Services, NEC | $3.39 B |
| 71 | SSunocoCorp LLCSUNC | Petroleum Refining | $3.25 B |
| 72 | Drilling Oil & Gas Wells | $3.23 B | |
| 73 | Crude Petroleum & Natural Gas | $2.86 B | |
| 74 | GGulfport Energy CorporationGPOR | Crude Petroleum & Natural Gas | $2.79 B |
| 75 | Miscellaneous Products of Petroleum & Coal | $2.65 B | |
| 76 | Drilling Oil & Gas Wells | $2.57 B | |
| 77 | DDNOW Inc.DNOW | Oil & Gas Field Machinery & Equipment | $2.50 B |
| 78 | WSelect Water Solutions, Inc.WTTR | Oil & Gas Field Services, NEC | $2.49 B |
| 79 | Crude Petroleum & Natural Gas | $2.45 B | |
| 80 | NNorthern Oil and Gas, Inc.NOG | Crude Petroleum & Natural Gas | $2.34 B |
| 81 | FFlowco Holdings Inc.FLOC | Oil & Gas Field Machinery & Equipment | $2.14 B |
| 82 | NNational Energy Services Reunited Corp.NESR | Oil & Gas Field Services, NEC | $1.97 B |
| 83 | BBKV CorporationBKV | Crude Petroleum & Natural Gas | $1.94 B |
| 84 | WWorld Kinect CorporationWKC | Wholesale-Petroleum & Petroleum Products (No Bulk Stations) | $1.87 B |
| 85 | IInnovex International, Inc.INVX | Oil & Gas Field Machinery & Equipment | $1.71 B |
| 86 | KKimbell Royalty Partners, LPKRP | Crude Petroleum & Natural Gas | $1.61 B |
| 87 | Crude Petroleum & Natural Gas | $1.60 B | |
| 88 | Wholesale-Petroleum & Petroleum Products (No Bulk Stations) | $1.59 B | |
| 89 | MMach Natural Resources LPMNR | Crude Petroleum & Natural Gas | $1.58 B |
| 90 | Oil & Gas Field Services, NEC | $1.56 B | |
| 91 | XExpro Group Holdings N.V.XPRO | Oil & Gas Field Services, NEC | $1.49 B |
| 92 | GGlobal Partners LPGLP | Wholesale-Petroleum Bulk Stations & Terminals | $1.49 B |
| 93 | DDorchester Minerals, L.P.DMLP | Crude Petroleum & Natural Gas | $1.35 B |
| 94 | Crude Petroleum & Natural Gas | $1.32 B | |
| 95 | RRPC, Inc.RES | Oil & Gas Field Services, NEC | $1.21 B |
| 96 | Drilling Oil & Gas Wells | $1.18 B | |
| 97 | Drilling Oil & Gas Wells | $1.18 B | |
| 98 | BBorr Drilling LimitedBORR | Drilling Oil & Gas Wells | $1.02 B |
| 99 | Crude Petroleum & Natural Gas | $932.25 M | |
| 100 | TTETRA Technologies, Inc.TTI | Crude Petroleum & Natural Gas | $807.60 M |
Industry membership comes from each company's SEC-registered SIC classification, parsed from EDGAR submissions. Market capitalizations refresh continuously from cached market data combined with SEC-reported share counts. See the full market cap rankings or the IPO filings tracker.