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
$122.575 B
0.1% of all US-listed value
Companies
20
Ranked #81 of 152 industries
Average
$6.129 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | SlbSLB | $71.2B | $47.96 | -4.08% | France |
| 2 | HalliburtonHAL | $26.5B | $31.75 | -2.96% | United States |
| 3 | Oceaneering InternationalOII | $4.35B | $43.70 | -2.82% | United States |
| 4 | WaterBridge InfrastructureWBI | $3.62B | $29.31 | -2.63% | Unknown |
| 5 | Liberty EnergyLBRT | $3.17B | $19.41 | -3.53% | United States |
| 6 | Select Water SolutionsWTTR | $2.68B | $19.33 | -3.30% | United States |
| 7 | National Energy Services ReunitedNESR | $2.38B | $23.63 | -3.59% | United States |
| 8 | ExproXPRO | $1.76B | $15.55 | -4.19% | Cayman Islands |
| 9 | Hornbeck Offshore ServicesHOS | $1.66B | $7.47 | -3.24% | United States |
| 10 | RpcRES | $1.32B | $5.94 | -1.66% | United States |
| 11 | ProPetroPUMP | $1.14B | $9.28 | -2.62% | United States |
| 12 | ProFracACDC | $868.7M | $4.77 | -2.15% | United States |
| 13 | Core LaboratoriesCLB | $463.9M | $10.11 | -1.85% | Netherlands |
| 14 | Natural Gas Services GroupNGS | $428.7M | $33.24 | -2.41% | United States |
| 15 | Ranger Energy ServicesRNGR | $359.9M | $15.38 | -1.73% | United States |
| 16 | North American Construction GroupNOA | $329.2M | $11.88 | -2.94% | Canada |
| 17 | KLX Energy ServicesKLXE | $137.4M | $1.30 | -4.06% | United States |
| 18 | Mammoth Energy ServicesTUSK | $136.9M | $2.85 | -2.23% | United States |
| 19 | Nine Energy ServiceNINE | $111.5M | $7.99 | +0.25% | United States |
| 20 | Recon TechnologyRCON | $26.6M | $1.20 | -0.83% | China |
All 20 companies. One row per company, with secondary share classes folded into their primary listing. Updated 9 Oct 2026.
Sectors oilfield services/equipment companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 234Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 500Major Banks 245Industrial Machinery/Components 212Catalog/Specialty Distribution 30Business Services 92Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 16Oil & Gas Production 116Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 175Department/Specialty Retail Stores 13Telecommunications Equipment 84Electronic Components 21Beverages (Production/Distribution) 36Electric Utilities: Central 61Finance: Consumer Services 165Consumer Electronics/Appliances 23Biotechnology: Biological Products (No Diagnostic Substances) 160Medical Specialities 44All industries โ
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.