Oil & Gas Companies in Houston, TX

GATE Energy is a Houston-based family of companies providing engineering, commissioning and field services to the energy sector.

Electric industrial heaters, heating systems and controls.

Flare equipment design, materials and construction.

Generon IGS Americas engineers and manufactures nitrogen generators, gas separation systems, oxygen generators, and process gas compression solutions, serving multiple industries with membrane, PSA, and custom-engineered equipment configurations.

Acquired by Control Devices, a portfolio company of HBM Holdings, in January 2024.

Houston maker of severe-service check, relief, regulator and control valves for upstream oil and gas. Control Devices, a portfolio company of HBM Holdings, acquired it in January 2024.

Global Project Consultants (GPC) provides project management and consulting services to the energy industry worldwide. The company operates subsidiary offices in Brazil, Nigeria, and Venezuela, and maintains joint venture and alliance partnerships across multiple regions including Angola, Europe, and Australasia.

Grace Instrument manufactures analytical instruments including viscometers, rheometers, and core flood testers for use in oil and gas laboratories and research institutions worldwide. Their equipment supports testing applications across drilling fluids, frac fluids, cementing, acidizing, and core analysis.

Formerly Gulf Publishing Company; rebranded in 2018.

Houston-based energy publisher founded in 1916, rebranded Gulf Energy Information in 2018. Its titles include World Oil and Hydrocarbon Processing. It is independently owned after a 2016 management buyout.

Halliburton is one of the world's largest oilfield services companies, providing products and services across the full reservoir lifecycle, including drilling, formation evaluation, well construction, completion, and production optimization.

Merged with Hornbeck Offshore Services effective September 1, 2026.

Houston-based offshore energy services company in well intervention, robotics and decommissioning. Merged with Hornbeck Offshore Services in an all-stock combination completed September 1, 2026.

Holloway Houston Inc. supplies lifting products and related services to the oil and gas industry, offering large product inventories, in-house testing facilities, and ISO 9001:2015 certified manufacturing and machining capabilities supporting marine construction, commercial diving, rental, and decommissioning operations.

Hot-Hed, Inc. provides oilfield services, equipment, and safety solutions to upstream, midstream, and downstream markets, specializing in wellhead repairs, pressure testing, hydrostatic testing, and equipment rentals, with certified welders, technicians, and petroleum engineers available for onshore and offshore operations worldwide.

Houston Digital Instruments, Inc. designs and manufactures certified, intrinsically safe instrumentation for oil and gas applications, including pressure gauges, pressure transmitters, pump stroke counters, and choke position indicators used in high-pressure, high-temperature drilling and well control operations onshore and offshore.

Hydraquip is a Danfoss Premier Partner providing hydraulic power systems, cooling solutions, electric motors and drives, hose assemblies and fittings, and service and repair support for a range of industrial applications.

Indumar Products, Inc. manufactures the Stop It pipe repair system, a composite wrap solution for sealing leaks and rehabilitating pipes in refineries, chemical plants, and other industrial settings, including high-pressure applications up to 2,000 psi.

Integrated Equipment, Inc. is an OEM manufacturer of API monogrammed pressure control equipment and elastomers, producing blowout preventers, valves, manifolds, wellheads, and related spare parts for the oil and gas industry.

InterMoor, an Acteon company, provides mooring solutions and related services for offshore oil and gas, renewables, and aquaculture sectors, including engineering and design, offshore installation, subsea foundations, retrieval, and decommissioning across all marine environments.

International Paint LLC is a global manufacturer of paints and protective coatings, operating under the AkzoNobel portfolio. The company supplies corrosion protection and coating solutions for marine, industrial, and oil and gas applications.

Formerly listed as J. Ray McDermott, the company's marine construction unit.

McDermott International is a Houston-based engineering and construction company for offshore and onshore energy projects. It emerged from Chapter 11 in 2020 as a privately held company.

Jelec USA Inc. supplies equipment and services to oil and gas companies, with a primary focus on drilling operations including platform rigs, MODUs, and e-frac applications, while also supporting energy transition initiatives within the oilfield sector.

Jogler, Inc. manufactures level measurement devices for industrial applications, including magnetic level gauges, magnetostrictive level transmitters, point level switches, liquid level and flow indicators, and laser level transmitters, serving customers across the Gulf Coast and internationally.

Manufactures, repairs and sells oilfield and drilling equipment.

KnightHawk Engineering, Inc. is a specialty engineering and consulting firm offering services in root cause analysis, forensic engineering, rotordynamics, corrosion engineering, risk management, and expert witnessing, with 24-hour emergency response capabilities for industrial clients worldwide.

Instrumentation valves, tube fittings and pipe fittings.

LHR Services & Equipment, Inc. is a Houston-based distributor of industrial safety products, including personal protective equipment, fall protection, FR clothing, and dropped object prevention tools, serving the oil and gas industry since 1983, with additional testing, repair, and re-certification services for safety equipment.

Mako DeepWater provides offshore and subsea products and services, including subsea enclosures, ROV control panels, PBOF cables, MUX connectors, marine riser and BOP cleaning, hydraulic flushing, and offshore fabrication, serving clients in Texas and nationwide.

MCM Oil Tools is a Texas-based API 6A certified manufacturer of manifolds, gate valves, chokes, check valves, and control panels for the oil and gas industry, offering both manual and hydraulic configurations with fully interchangeable OEM-compatible components.

Metal Coatings provides protective coating services and industrial fasteners to clients across multiple industries, including oil and gas. The company supports corrosion prevention and structural integrity needs for a variety of applications.

MEXSSUB International, Inc. provides permanent pipeline integrity solutions for oil and gas operators worldwide, offering both preventative and corrective repair systems across the full lifespan of a pipeline.

Micro-SMART Systems, Inc. designs and manufactures slimline downhole data acquisition tools for oil and gas exploration, measuring pressure, temperature, flow, gamma, CCL, and fluid capacitance, with capabilities including slickline perforating, downhole shut-in, cement dumping, and braided line cutting.

MicroTesla makes measurement-while-drilling (MWD) tools and related instrumentation in the Houston area.

MODEC International is a general contractor specializing in the engineering, procurement, construction, and installation of floating production systems, including FPSOs, FSOs, tension leg platforms, semi-submersibles, MOPUs, and FLNG vessels.

ModuSpec provides rig inspection, well control verification, and assurance services to oil and gas operators, drilling contractors, and service companies worldwide. Services include rig reactivation, subsea asset monitoring, managed pressure drilling, engineering solutions, and HSEQ training.

Moss Seal manufactures and distributes fluid sealing solutions for oil and gas applications, including frac balls, ball seats, back-ups, wipers, and U-cups, with in-house capabilities in steel, aluminum, rubber, composites, and thermoplastics, and holds ISO 9001:2015 certification.

MSI Pipe Protection Technologies, formerly listed as MSI Oilfield Products, makes thread protectors and other pipe protection products for oil country tubular goods.

Manufacturer and distributor of brass, bronze and copper alloys.

National-K-Works Inc. designs and manufactures thermal and pressure management solutions, including vacuum flasks, pressure housings, and gas gun barrels, serving the oilfield, wireline logging, and geothermal sectors. The company also provides precision machining, pressure testing, and engineering services.

Drilling-rig packages, triplex mud pumps and wellhead equipment.

Fluids Systems business sold by Newpark Resources to SCF Partners in September 2024.

Newpark Drilling Fluids provides drilling, completion and stimulation fluids to oil and gas operators. The fluids business was sold by Newpark Resources to SCF Partners in September 2024.

Ocean Flow International provides engineering and project management services to the offshore energy industry, with capabilities spanning subsea architecture, riser engineering, subsea tree design, geotechnical analysis, and welding engineering.

Oceaneering International provides subsea engineering services and robotic solutions to the offshore energy industry, including ROV operations, well intervention, diving services, and integrity management, supported by a range of subsea products and intervention vessels.

OceanWorks International Inc. provides subsea systems engineering, design, fabrication, and testing services to the military, scientific, and oil and gas markets, with expertise in deep submergence technology, manned submersible systems, and seafloor network solutions.

Oil-Air Products is a fluid power distributor of hydraulic and pneumatic products and custom-engineered solutions, in business since 1983.

Formerly Orion Marine Group; renamed in 2016.

Orion Marine Group, now Orion Group Holdings, provides marine construction, dredging and specialty construction services. It is Houston-based and changed its name in 2016.

Formerly OYO Geospace.

OYO Geospace, now Geospace Technologies, designs and manufactures seismic instruments and sensors for energy exploration and other industrial uses. It is headquartered in Houston.

Patterson Services, Inc. rents oilfield tubulars, blowout preventers (BOPs), and associated equipment to operators across major U.S. basins and international markets, including Africa, Europe, Asia, South America, and the Middle East.

Patterson Tubular Services provides oil country tubular goods (OCTG) services including inspection, inventory management, handling and maintenance, and rig return programs. The company also offers barge and rail services and maintains a quality management system for tubular asset management.

Formed in 2008 when Pegasus International merged with Universal ENSCO; owned by PMC Capital Partners since 2021.

UniversalPegasus International is a Houston-based pipeline engineering and project management firm, formed in 2008 from the merger of Pegasus International and Universal ENSCO.

Pem-Tech, Inc. designs and supplies industrial gas detection products, including fixed sensors, monitors, controllers, wireless gas detectors, and gas analyzers for toxic, combustible, and oxygen-deficiency applications.

Manufacturing division assets acquired by Pigs Unlimited International in October 2024.

Pipeline Pigging Products manufactured pipeline pigs and launchers in Tomball. Pigs Unlimited International acquired its manufacturing division assets in October 2024, while the pipe-cleaning and consulting arm continues as Flowmore Services.

Process safety management, risk management and loss prevention.

RSVP Actuators & Controls, based in Houston, Texas, manufactures valve actuators and controls configurable with scotch-yoke, rack and pinion, and spring diaphragm mechanisms.

SBM-IMODCO Inc., part of the SBM Offshore Group, designs and services marine offloading systems, including Catenary Anchor Leg Mooring and Single Point Mooring buoys that keep tankers moored while transferring fluids via subsea pipeline for the global offshore energy industry.

Scorpion Oil Tools manufactures hydraulic chain tongs used for makeup and breakout operations across oil, gas, mining, construction, and drilling applications. Their product line covers pipe OD ranges from 2-3/8" to over 36" and torque ratings up to 250,000 ft-lbs.

SEACOR Marine provides marine and support transportation services to offshore energy industries, including oil and gas exploration and production and offshore wind, operating and managing a fleet of offshore support vessels including platform supply vessels, fast support vessels, and liftboats.

A MIND Technology business.

Exploration products for the marine seismic survey industry.

Houston-based Seamar Divers International provides marine construction, ship husbandry inspection, support services and marine casualty response.

Seitel Incorporated provides land-based seismic data acquisition, processing, and licensing to oil and gas exploration and production companies across North America, maintaining a proprietary library of subsurface geophysical data accumulated since 1982.

Engineering and technical personnel for Latin American O&G and petrochemical.

Shaw Pipeline Services provides pipeline inspection and non-destructive testing services, including ultrasonic testing, radiography, and failure analysis, to oil and gas clients worldwide. The company also offers valve repair and supports pipeline installation projects from award through to completion.

Formerly Shell Oil Company; renamed in 2022.

Shell USA, Inc., formerly Shell Oil Company, is the Houston-based U.S. subsidiary of Shell plc, with offshore oil and gas production, fuels marketing and chemicals businesses.

Smart Pipe Company, LP develops and manufactures composite pipeline rehabilitation systems, including the XPL-300, designed for high-pressure applications up to 1,440 psi in pipelines 4 to 16 inches in diameter, using a portable factory for continuous on-site installation.

Sonardyne Inc. provides underwater technology systems for the oil and gas, defense, and scientific sectors, including inertial navigation, sonar imaging, acoustic positioning, and wireless communications solutions for use with crewed vessels, ROVs, and autonomous underwater vehicles.

Southwest Oilfield Products, Inc. manufactures mud pumps and well pumps for oil and gas exploration and production companies, and provides repair and service for well service equipment including coil tubing units, snubbing units, nitrogen pumping units, and valves.

Stabil Drill provides rental tools for downhole bottomhole assemblies, including stabilizers, non-magnetic drill collars, hole openers, shock tools, and reamers. The company operates manufacturing and machining facilities along the Gulf Coast, in Atlantic Canada, and Scotland.

Stewarts-USA manufactures and supplies pressure gauges, temperature gauges, subsea gauges, caisson gauges, test gauges, diaphragm seals, valves, and manifolds, serving industrial applications from Houston, Texas.

Stress Engineering Services, Inc. provides engineering design, analysis, and testing services across oil and gas, chemical, pipeline, and power sectors, with expertise in mechanical engineering, failure analysis, materials and metallurgy, and finite element analysis.

Subsea Solutions provides third-party auditing, maintenance, and testing of subsea well-control equipment, including conventional, MUX, and intervention BOP systems. The company also offers rig acceptance surveys, letters of verification, and subsea well-control training for drilling contractors and operators worldwide.

Talon Technical Sales is a manufacturers representative specializing in industrial instrumentation for physical measurement, including temperature, pressure, flow, force, torque, moisture, and vibration, serving the oil and gas, petrochemical, and related industries across Texas, Oklahoma, and Louisiana.

TAM International, Inc. provides inflatable packers, swellable packers, and related downhole products and services to the oil and gas industry, supporting completion and production operations. The company is headquartered in Houston and serves customers worldwide.

Texma Petroleum Machinery manufactures API 7K and ISO 9001 certified OEM-quality replacement fluid end parts and expendables for mud pumps, including crossheads, liners, pistons, crankshafts, valves, and handling tools.

Formerly TGS-NOPEC Geophysical; merged with PGS in July 2024.

TGS, formerly TGS-NOPEC Geophysical Company, provides multi-client seismic data, imaging and other energy data services. It completed its merger with PGS in July 2024.

The REACH Group is a global consulting and coaching firm that helps upstream oil and gas companies implement performance optimization, safety culture, leadership development, and human performance improvement programs.

Thrustmaster of Texas, Inc. is a Houston manufacturer of marine propulsion systems, including tunnel, retractable and azimuth thrusters, waterjets and portable dynamic positioning systems. It was founded in 1984.

Total Safety U.S., Inc. provides industrial safety services such as gas detection, safety personnel and communications equipment to refining, petrochemical and upstream clients. Its office is on N. Sam Houston Pkwy W, Houston.

Transocean is an offshore contract drilling company based in Steinhausen, Switzerland, with a Houston office. It operates 27 mobile offshore drilling units: 20 ultra-deepwater drillships and 7 harsh environment semisubmersibles.

Triple S Steel Supply is a family-owned steel service center distributing structural steel, tubing, and specialty metals across more than 50 North American and Colombian locations, with value-added processing services for customers in construction, manufacturing, and infrastructure.

Tubacex America Inc. is a manufacturer and distributor of seamless stainless steel and high-nickel alloy tubing, serving the oil and gas, petrochemical, aerospace, and energy industries through two U.S. manufacturing facilities and multiple service centers.

Tube Supply is a Houston supplier of plate, tube and bar steel, including alloy, API 5CT, carbon, stainless and aluminum grades, for oil and gas and other industries.

U.S. Bolt Manufacturing, Inc. produces engineered bolting and forged fasteners for critical and safety-related applications, including deepwater offshore drilling equipment, turbomachinery, pressure vessels, and navy ships. The Houston-based company holds API 20E and API 20F monogram licenses and ISO 9001 certification.

UTEX Industries designs and manufactures engineered fluid sealing products, including custom rubber and urethane molded components, mechanical seals, gaskets, and well service products for the oil and gas, aerospace, water distribution, and industrial markets.

Vantage Drilling is an offshore drilling contractor operating ultra-deepwater drillships and jack-up rigs. Its main offices are in Dubai, with an office in Houston.

Weatherford International is a Houston-based oilfield services company providing drilling, evaluation, completion, production and intervention services in about 75 countries.

Well Control School provides well control training and certification to operators, drilling contractors and well-servicing companies. It is listed in the IWCF registry with a Houston center at 16770 Imperial Valley Dr.

Formerly Western Well Tool; renamed in 2010.

WWT International, formerly Western Well Tool, makes drill string torque reducing tools, coil tubing tractors and drillpipe and casing protectors. It was renamed in 2010.

Westney Consulting Group provides independent advisory and management consulting services to leaders in the energy, chemicals, power, and mining industries, focusing on capital project strategy, estimate validation, project assurance, and organizational development to improve project outcomes.

Mearthane Products Corporation completed the acquisition of Whitefield Plastics in April 2023.

Whitefield Plastics Corporation made urethane products for the oil and gas industry. It was acquired by Mearthane Products Corporation in April 2023.

Wild Well Control is a Houston-based provider of emergency well control response, relief well and well engineering, subsea intervention systems and well control training for oil and gas operators worldwide.

Design, manufacture and testing of drill-through well-control equipment.

Engineering consulting and software development.

ExxonMobil is a major integrated oil and gas company engaged in the exploration, production, refining, and chemical manufacturing of petroleum and natural gas resources, with ongoing investment in emissions-reduction technologies across its operated assets.

Occidental Petroleum (Oxy) is an international oil and gas exploration and production company with operations primarily in the United States, the Middle East, and North Africa, including major positions in the Permian Basin, DJ Basin, and Gulf of Mexico.

Phillips 66 refines and markets petroleum products including gasoline, diesel, jet fuel, and lubricants, and also gathers and processes natural gas and NGLs, and manufactures petrochemicals, polymers, and plastics.

Acquired by ConocoPhillips on 22 November 2024.

Marathon Oil Corporation was a Houston-based independent oil and gas producer with Eagle Ford, Bakken, Permian and STACK/SCOOP assets. ConocoPhillips acquired it in November 2024.

Merged into Devon Energy in 2026.

Coterra Energy is a diversified upstream oil and natural gas exploration and production company operating across multiple U.S. basins, with activities spanning drilling, acquisition, and seismic data processing, as well as midstream operations.

APA Corporation, through its subsidiaries including Apache Corporation, explores for and produces oil and gas across operations in the United States, United Kingdom, Egypt, and Suriname.

Acquired by APA Corporation on 1 April 2024.

Callon Petroleum was a Houston-based independent oil and gas producer in the Permian Basin. APA Corporation acquired it in April 2024.

Kinder Morgan is a Houston-based energy infrastructure company that owns or operates about 78,000 miles of pipelines and terminals moving natural gas, crude oil, refined products, renewable fuels and CO2.

Enterprise Products Partners is one of North America's largest midstream energy companies, providing transportation, storage, gathering, fractionation, processing, and terminaling services for natural gas, refined products, liquefied petroleum gases, and petrochemicals through an extensive pipeline network.

Plains All American Pipeline owns and operates midstream energy infrastructure across the U.S. and Canada, providing pipeline transportation, terminalling, storage, and gathering services for crude oil, natural gas liquids, and natural gas.

Targa Resources is a large independent midstream infrastructure company that gathers, processes, and transports natural gas and natural gas liquids, connecting domestic production to U.S. and international markets through its pipeline and storage network.

Western Midstream operates as a midstream services company, gathering, processing, and transporting natural gas, crude oil, and produced water for upstream producers. The company manages pipeline and processing infrastructure to move energy commodities from production sites to downstream markets.

CITGO Petroleum owns and operates three crude oil refineries in Louisiana, Illinois, and Texas, with a combined capacity of approximately 807,000 barrels per day, and distributes transportation fuels, lubricants, and petrochemicals through terminals, pipelines, and roughly 4,000 branded retail outlets.

Houston-based plastics and chemicals company with major Gulf Coast operations. It shut its Houston refinery in February 2025 and no longer refines crude.

Patterson-UTI Energy provides drilling services and technology, completion solutions, drill bit solutions, directional drilling, and wellbore guidance services to the oil and gas industry, operating through a family of companies including NexTier, Ulterra, and MS Directional.

Nabors Industries operates one of the world's largest land drilling rig fleets and provides offshore drilling rigs, directional drilling services, and automation technologies across approximately 20 countries.

Precision Drilling is a drilling contractor offering a fleet of high-performance drilling rigs, well service rigs, and supporting technologies to oil and gas operators, along with camps, rental equipment, and technical services.

SLB (Schlumberger) is an oilfield services and technology company providing solutions across drilling, production, subsea, and stimulation operations, with capabilities spanning mud logging, carbon capture and storage, geoenergy, and AI-driven automation for the global energy industry.

NOV Inc. designs and manufactures equipment, components, and technologies for oil and gas drilling, well completion, and production operations. The company serves operators and contractors worldwide with products spanning downhole tools, drilling rigs, and rig systems.

Acquired by SLB on 16 July 2025.

ChampionX supplied production chemicals, artificial lift and digital technologies to oil and gas producers. SLB acquired it in July 2025.

TechnipFMC is a Houston-based oilfield services and technology company specializing in subsea and surface technologies for the energy industry, providing integrated engineering, products, and services to support upstream oil and gas development and energy transition projects.

Expro provides oilfield services spanning well construction, well flow management, subsea well access, and well integrity and intervention, and incorporates the capabilities of Frank's International. The company offers technologies including annulus intervention, well testing, Powerchokes, and subsea equipment.

Noble Corporation is an offshore contract drilling company that owns and operates a fleet of drilling units serving the oil and gas industry, with a focus on ultra-deepwater and high-specification jackup drilling projects worldwide.

Cactus Inc. designs, manufactures, sells, and rents engineered wellheads and pressure control equipment for onshore unconventional oil and gas wells, supporting drilling, completion, and production phases. Its products include the SafeDrill wellhead system, frac stacks, zipper manifolds, and production trees.

Select Water Solutions provides water management and chemical technology services to oil and gas operators across all major U.S. basins. The company handles the full water lifecycle, including sourcing, transfer, treatment, recycling, and disposal, through its water solutions, water infrastructure, and chemical technologies divisions.

Acquired by Western Midstream Partners on 15 October 2025.

Aris Water Solutions was a Houston-based provider of produced water handling and recycling to Permian oil and gas producers. Western Midstream Partners acquired it in October 2025.

Formerly Solaris Oilfield Infrastructure.

Solaris Energy Infrastructure, formerly Solaris Oilfield Infrastructure, provides power generation and proppant logistics equipment and services to energy and other industrial customers.

Forum Energy Technologies manufactures and supplies oilfield equipment for drilling, well construction, completion, and stimulation operations, as well as subsea technologies and valve solutions, serving oil, gas, and renewable energy customers across major production regions worldwide.

Emerson provides automation solutions, software, and technology across industries, offering products including distributed control systems, safety instrumented systems, measurement instrumentation, valves, actuators, and flow measurement tools for industrial applications.

Merged into KLX Energy Services on 28 July 2020.

Quintana Energy Services provided directional drilling, pressure pumping and wireline services. It merged into KLX Energy Services in July 2020.

CGG renamed itself Viridien in 2024.

Viridien, formerly CGG, is a Paris-based geoscience, earth data and digital technology company serving oil and gas and other industries. CGG was founded in 1931.

Quorum Software provides business management and accounting software for oil and gas companies, offering solutions that connect operational workflows, data systems, and reporting functions across exploration, production, and gas plant operations in global energy markets.

Acquired by IFS in late 2022 and rebranded IFS Energy & Resources.

P2 Energy Solutions supplied land, accounting and production software to oil and gas operators. IFS acquired it in November 2022 and rebranded it IFS Energy & Resources.

Validere is a software company offering measurement, reporting and verification and environmental operations software that helps energy operators manage emissions data and compliance, with offices in Houston, Calgary and Toronto.

Bureau Veritas provides testing, inspection, and certification services to companies in the oil and gas, marine, offshore, and industrial sectors, helping clients meet quality, health, safety, and environmental standards across global operations.

Acuren merged with NV5 Global in August 2025 and renamed itself TIC Solutions.

TIC Solutions, formerly Acuren, provides testing, inspection, certification and engineering services to industrial clients including oil and gas. It merged with NV5 Global in 2025 and trades as TIC.

Team Inc. provides asset integrity management and performance solutions, including non-destructive testing, leak detection, on-stream repair, corrosion control, heat treating, and valve testing services for pipeline, aviation, and other industrial sectors.

Asset-protection and inspection technology firm with major Gulf Coast refining and pipeline operations.

KBR provides engineering, science, and technology solutions to government and industrial clients across sectors including hydrocarbons, cybersecurity, and program management, with a focus on sustainable technology and consulting services.

S&B Engineers and Constructors provides engineering, procurement, and construction (EPC) services for large-scale industrial facilities, supporting clients across midstream, power, and government sectors with services ranging from feasibility studies and pipe fabrication to plant maintenance and commissioning.

Wood Group was acquired by Sidara, completed March 2026; it keeps the Wood brand.

Wood provides engineering, consulting and operations services to the energy and materials sectors. Sidara acquired its parent, Wood Group, in March 2026 and Wood continues under its own brand.

Audubon Companies provides engineering, procurement, construction, consulting, fabrication, and technical field services to the energy, chemicals, power, and industrial markets, supporting projects across the full asset life cycle from conceptual design through decommissioning.

DistributionNOW (DNOW) is a global distributor of pipe, valves, fittings, pumps, and industrial equipment serving upstream, midstream, downstream, and industrial markets. The company also provides supply chain solutions, technical product expertise, and digital procurement tools from its Houston headquarters.

Acquired by DNOW on 6 November 2025.

MRC Global distributed pipe, valves and fittings to energy and industrial customers from Houston. DNOW acquired it in November 2025.

Texas Pipe & Supply is a Houston-based distributor of carbon and stainless steel pipe, fittings and flanges, founded in 1918, with branch locations serving local markets.

OGGN (Oil and Gas Global Network) operates a podcast network focused on the oil, gas, and energy industry, producing multiple active shows covering topics such as upstream operations, HSE, energy transition, supply chain, and industry leadership.

Owned by Crain Communications since 2025.

Hart Energy is a Houston-based media and research company serving the oil and gas industry since 1973 with news, data and events. Crain Communications acquired it in 2025.

Rigzone is an online platform serving the oil and gas industry with news, job listings, and industry data. It also provides recruitment solutions connecting employers with a database of over two million industry professionals worldwide.

Owned by private equity firm Gemspring Capital since 2024.

Houston-based workforce solutions and recruitment firm serving energy, technology and engineering clients; acquired by private equity firm Gemspring Capital in 2024.

Brunel is a global staffing and workforce solutions firm serving the energy, mining, life sciences, and technology sectors, with more than 120 offices and 12,000 specialists worldwide providing contract staffing, project consulting, and global mobility services.

Now an Allied Reliability brand.

Jamison Products makes engineered fluid handling equipment, including basket strainers, filters, pig launchers and receivers, and ASME code vessels, built at a fabrication facility in Houston. It is now an Allied Reliability brand.

A subsidiary of China's Shandong Offshore Equipment since 2015.

Northern Offshore is an offshore drilling contractor operating jackup rigs, with an office in Houston.