Largest oilfield services/equipment companies
Every US-listed oilfield services/equipment company we cover, 20 of them, ranked by market capitalisation, with revenue and earnings taken from their SEC filings.
Combined market cap
$130.638 B
0.1% of all US-listed value
Companies
20
Ranked #80 of 152 industries
Average
$6.532 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | SlbSLB | $77.0B | $51.87 | -0.48% | France |
| 2 | HalliburtonHAL | $27.5B | $33.01 | +0.49% | United States |
| 3 | Oceaneering InternationalOII | $4.60B | $46.24 | +0.28% | United States |
| 4 | WaterBridge InfrastructureWBI | $3.56B | $28.86 | -2.37% | Unknown |
| 5 | National Energy Services ReunitedNESR | $3.31B | $32.81 | -0.85% | United States |
| 6 | Liberty EnergyLBRT | $2.98B | $18.27 | +1.27% | United States |
| 7 | Select Water SolutionsWTTR | $2.67B | $19.29 | -4.83% | United States |
| 8 | ExproXPRO | $1.87B | $16.51 | +0.79% | Cayman Islands |
| 9 | Hornbeck Offshore ServicesHOS | $1.86B | $8.35 | -0.71% | United States |
| 10 | RpcRES | $1.30B | $5.85 | +2.27% | United States |
| 11 | ProPetroPUMP | $1.20B | $9.80 | -2.29% | United States |
| 12 | ProFracACDC | $845.0M | $4.64 | -1.70% | United States |
| 13 | Core LaboratoriesCLB | $487.8M | $10.63 | -2.83% | Netherlands |
| 14 | Natural Gas Services GroupNGS | $428.0M | $33.18 | -0.36% | United States |
| 15 | Ranger Energy ServicesRNGR | $366.2M | $15.65 | +0.77% | United States |
| 16 | North American Construction GroupNOA | $346.4M | $12.50 | +0.00% | Canada |
| 17 | Mammoth Energy ServicesTUSK | $140.5M | $2.92 | -2.99% | United States |
| 18 | Nine Energy ServiceNINE | $125.0M | $8.96 | -1.97% | United States |
| 19 | KLX Energy ServicesKLXE | $31.3M | $1.47 | -2.00% | United States |
| 20 | Recon TechnologyRCON | $28.7M | $1.37 | +3.01% | China |
All 20 companies. One row per company, with secondary share classes folded into their primary listing. Updated 24 Sept 2026.
Sectors oilfield services/equipment companies sit in
Other industries
Semiconductors 101Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 234Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 500Major Banks 246Industrial Machinery/Components 211Catalog/Specialty Distribution 31Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Oil & Gas Production 116Real Estate Investment Trusts 177Department/Specialty Retail Stores 14Telecommunications Equipment 82Electronic Components 21Beverages (Production/Distribution) 36Finance: Consumer Services 162Electric Utilities: Central 60Consumer Electronics/Appliances 23Biotechnology: Biological Products (No Diagnostic Substances) 160Natural Gas Distribution 29All industries โ
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.