Largest oilfield services/equipment companies
Every US-listed oilfield services/equipment company we cover — 21 of them — ranked by market capitalisation, with revenue and earnings taken from their SEC filings.
Combined market cap
$128.289 B
0.1% of all US-listed value
Companies
21
Ranked #82 of 152 industries
Average
$6.109 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | SlbSLB | $75.0B | $50.53 | -1.96% | France |
| 2 | HalliburtonHAL | $26.6B | $31.89 | -1.91% | United States |
| 3 | Oceaneering InternationalOII | $4.77B | $47.97 | -2.60% | United States |
| 4 | WaterBridge InfrastructureWBI | $3.95B | $32.00 | -2.20% | Unknown |
| 5 | Liberty EnergyLBRT | $3.25B | $19.94 | -0.50% | United States |
| 6 | National Energy Services ReunitedNESR | $2.93B | $29.02 | +0.59% | United States |
| 7 | Select Water SolutionsWTTR | $2.80B | $20.23 | -2.27% | United States |
| 8 | ExproXPRO | $1.92B | $16.96 | -0.18% | United States |
| 9 | Helix Energy Solutions GroupHLX | $1.41B | $9.60 | -2.14% | United States |
| 10 | ProPetroPUMP | $1.35B | $10.98 | +0.27% | United States |
| 11 | RpcRES | $1.30B | $5.87 | -0.34% | United States |
| 12 | ProFracACDC | $781.6M | $4.32 | -3.25% | United States |
| 13 | Core LaboratoriesCLB | $520.8M | $11.35 | +1.52% | Netherlands |
| 14 | Natural Gas Services GroupNGS | $466.3M | $37.01 | +1.68% | United States |
| 15 | North American Construction GroupNOA | $411.7M | $14.58 | +0.48% | Canada |
| 16 | Ranger Energy ServicesRNGR | $376.8M | $16.10 | +0.37% | United States |
| 17 | Mammoth Energy ServicesTUSK | $163.3M | $3.39 | +15.31% | United States |
| 18 | Nine Energy ServiceNINE | $141.7M | $10.16 | -2.59% | United States |
| 19 | NCS MultistageNCSM | $125.3M | $47.75 | -1.83% | United States |
| 20 | KLX Energy ServicesKLXE | $41.0M | $2.06 | -4.19% | United States |
| 21 | Recon TechnologyRCON | $3.22M | $0.04 | -15.27% | China |
All 21 companies. One row per company — secondary share classes are folded into their primary listing. Updated 9 Aug 2026.
Sectors oilfield services/equipment companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 232Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 501Major Banks 245Industrial Machinery/Components 209Catalog/Specialty Distribution 30Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 179Department/Specialty Retail Stores 14Oil & Gas Production 116Telecommunications Equipment 82Beverages (Production/Distribution) 35Electronic Components 21Finance: Consumer Services 163Electric Utilities: Central 59Consumer Electronics/Appliances 23Natural Gas Distribution 29Medical Specialities 44All industries →
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered — see methodology.