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50 leading multinational companies in Oklahoma

Tamtam tracks 51 multinational companies headquartered in Oklahoma. This list ranks the 50 largest by number of employees on LinkedIn, led by Express Employment International, H&P and T.D. Williamson. Their median headcount is 428. Half of them were founded in 1979 or later. The most common headquarters are Tulsa (32) and Oklahoma City (12).

๐Ÿ‡บ๐Ÿ‡ธ Oklahoma50 companiesUpdated Nov 11, 2026

This selection of multinational companies in Oklahoma includes several large, established firms, particularly in the oil and gas sector. Key players like H&P and T.D. Williamson, both founded in 1920 and headquartered in Tulsa, specialize in advanced drilling technologies and pipeline solutions. Zeeco, Inc., also based in Tulsa, is a global leader in combustion and environmental solutions. Beyond energy, Express Employment International, an Oklahoma City-based staffing company founded in 1983, stands out with over 14,000 employees.

A clear pattern is the dominance of Tulsa as a headquarters city for these multinational operations, especially within the oil and gas industry. Companies like NORDAM, an aerospace firm, and Manhattan Construction Company, a long-standing construction business, further contribute to Tulsa's industrial concentration. Oklahoma City also features prominently with companies such as Continental Resources, an independent oil producer, and ATC, a global leader in vehicle parts remanufacturing.

#CompanyIndustryHeadquarters EmployeesFounded
1
Express Employment Internationalexpresspros.com

International staffing company supporting franchise locations worldwide, providing staffing and HR services to connect individuals with jobs and businesses with employees

Staffing and Recruiting ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 14,211 1983
2
H&Phelmerichpayne.com

Provider of advanced drilling technologies and solutions enhancing productivity, reliability, safety, and efficiency in land, international, and offshore operations.

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 11,576 1920
3
T.D. Williamsontdwilliamson.com

The company provides innovative solutions for pipeline operators worldwide to maximize uptime, improve throughput, minimize risk, and address regulatory climate challenges

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 1,872 1920
4
Zeeco, Inc.zeeco.com

A global leader in combustion and environmental solutions for various industries, specializing in ultra-low emission burners, flaring systems, and waste incineration

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 1,812 1979
5
NORDAMnordam.com

A global aerospace company specializing in designing, manufacturing, and maintaining propulsion systems, aircraft structures, and transparencies for business and military markets

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 1,637 1969
6
Continental Resourcesclr.com

Independent oil producer focused on exploration and production in major U.S. basins, driving American energy independence and market leadership.

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 1,498 1967
7
Cherokee Nation Businessescherokeenationbusinesses.com

An economic powerhouse owned by Cherokee Nation, focusing on innovation, diversification, job creation, and generating billions in annual revenue globally

Information Services ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 1,226 2004
8
Manhattan Construction Companymanhattanconstructiongroup.com

Family-owned construction company since 1896, specializing in building facilities across the US, Mexico, Central America, and the Caribbean, with a focus on trust and long-term relationships

Construction ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 1,108 1896
9
Chickasaw Nation Industries, Inc.chickasaw.com

Operating subsidiaries for federal government and commercial clients, offering solutions in various sectors, supporting Chickasaw Nation economic development.

Government Relations Services ๐Ÿ‡บ๐Ÿ‡ธ Norman 1,095 1996
10
Melton Truck Linesmeltontruck.com

Leading flatbed trucking company providing on-time transportation service across North America, specializing in Mexico with a 98% on-time record and strong focus on safety and driver training

Truck Transportation ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 951 1954
11
John Zinkjohnzink.com

Global leader in environmental solutions for various industries, specializing in engineered vapor and combustion systems with Smart Combustionโ„ข technology for optimized performance and efficiency

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 869 n/a
12
Matrix Service Companymatrixservicecompany.com

A leading industrial engineering, construction, and maintenance contractor focused on sustainability and strong ESG practices, with global offices and recognitions

Construction ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 809 1984
13
Legalshield Independent Associatelegalshield.com

Legal protection and consultation services for personal legal matters, including family, financial, home, auto, IRS, and estate issues, offered at a low monthly fee

Legal Services ๐Ÿ‡บ๐Ÿ‡ธ Ada 789 n/a
14
ATCatcreman.com

A global leader in remanufacturing solutions for powertrain and drivetrain products for vehicles of all types, offering engineering services worldwide

Motor Vehicle Parts Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 727 n/a
15
Matrix Servicematrixservicecompany.com

A provider of procurement, fabrication, and construction services for energy and industrial infrastructure, specializing in aboveground storage tanks and vessels

Construction ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 603 1984
16
Feed the Childrenfeedthechildren.org

A leading anti-hunger nonprofit organization dedicated to defeating childhood hunger by providing food, education, essentials, and clean water globally

Non-profit Organizations ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 600 1979
17
Delaware Resource Groupdrgok.com

Global aerospace defense contractor providing training systems integration, critical training, and logistics services worldwide for modern military programs and aircraft

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 575 2002
18
Kimray, Inckimray.com

A manufacturer based in Oklahoma City creating oil and gas control equipment since 1948 Specializing in temperature, level, flow, and pressure control solutions

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 532 1948
19
AAPGaapg.org

A global association for petroleum geologists, providing publications, conferences, and educational opportunities for professionals in the upstream energy industry worldwide

Non-profit Organizations ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 493 1917
20
The Bama Companies, Incbama.com

Supplier of hand-held pies, biscuits, buns, pie shells, and pizza crusts to major restaurant chains worldwide with custom oven-ready products.

Food and Beverage Services ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 486 1925
21
AMETEK MROametekmro.com

Global provider of third-party MRO services for commercial, regional, and general aviation Specializing in repair and overhaul services with various approvals

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 481 n/a
22
YouVersionyouversion.com

Creating biblically-centered experiences through technology to help people seek intimacy with God daily, part of an innovative church ministry

Religious Institutions ๐Ÿ‡บ๐Ÿ‡ธ Edmond 475 2007
23
BS&B Safety Systemsbsbsystems.com

Global leader in non-reclosing pressure relief devices, setting industry standards with innovative products and services to protect personnel and equipment worldwide

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 442 n/a
24
Page Not Active - H&P Technologieshpinc.com

A division of H&P, find us on LinkedIn under the handle @Helmerich-Payne for more information

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 431 n/a
25
Avantive Solutionsavantivesolutions.com

Global contact center and BPO services specializing in customer engagement, strategic sales, and digital marketing across multiple international markets.

Outsourcing and Offshoring Consulting ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 428 1988

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26
capSpirecapspire.com

Experts in driving growth throughout the value chain through consulting, process implementation, operational support, and industry knowledge for strategic business advancement

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 408 2009
27
Jasco Productsbyjasco.com

Jasco designs and develops innovative home automation, lighting, security, entertainment, power, and mobility products for global distribution through major retailers and online platforms

Computers and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 361 1975
28
PCI Energy Solutionspcienergysolutions.com

A team of experts creates software solutions for power generation companies, optimizing efficiency, reducing costs, and promoting a cleaner energy future

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Norman 358 1992
29
McElroy Manufacturing, Inc.mcelroy.com

Established in 1954, this company specializes in engineering and manufacturing fusion equipment for thermoplastic pipes, leading the industry with technological advancements

Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 335 1954
30
MIRATECHmiratechcorp.com

Industry leader providing emission and acoustical solutions for engines, helping customers meet regulatory requirements while reducing emissions complexity Engineered for performance and quality

Environmental Services ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 325 1992
31
Matrix NACmatrixservicecompany.com

A subsidiary providing procurement, construction, maintenance, and repair services to North American energy and industrial markets with a focus on sustainability and ESG practices

Construction ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 310 n/a
32
InterWorksinterworks.com

A people-focused tech consultancy offering premier services in data management, visualization, server monitoring, and IT solutions tailored to unique client needs

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Stillwater 306 1996
33
Reliance Oilfield Servicesrelianceofs.com

A company focused on extraordinary service, community impact, and employee support, prioritizing people over profits and creating a positive workplace culture

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 302 2004
34
Enovation Controlsenovationcontrols.com

Innovator of electronic controls and displays, providing customized solutions for engines, engine-driven equipment, and specialty vehicles across diverse markets globally.

Appliances, Electrical, and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 265 1939
35
Accurus Aerospace Corporationaccurusaero.com

Leading Tier II supplier of machined parts, kits, assemblies, and processing services to global aerospace and defense industry Focused on high-value aircraft platforms

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 245 2013
36
Red Devil, Inc.reddevil.com

Manufacturing tools, chemical products and accessories for maintenance and improvement industry since 1872, with sales locations worldwide and headquarters in Tulsa, Oklahoma

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 222 1872
37
Fabricut, Incfabricut.com

A leading distributor of decorative products, offering fabrics, trimmings, wallcoverings, hardware, finished goods, and furniture with a focus on customer satisfaction and innovative designs

Wholesale ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 205 1954
38
Fox Rent A Carfoxrentacar.com

A global provider of low-cost leisure car rental services with locations in the US, Canada, Mexico, Europe, and the Middle East, offering a diverse fleet and dedicated customer service

Travel Arrangements ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 178 1989
39
TTEC Holding Inc.ttecjobs.com

An American company based in Colorado that specializes in customer experience technology and services

Consumer Services ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 165 2015
40
Da/Pro Rubber, Inc.daprorubber.com

Specializing in molding high-quality components since 1960, providing expert assistance in rubber, plastic, and TPE molding with ISO-certified facilities

Plastics and Rubber Product Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Broken Arrow 124 1961
41
Capital Advisorscapitaladv.com

Wealth management firm founded in 1978 with over $45 Billion in assets under management, offering transparent investment processes and purposeful strategies

Financial Services ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 85 1978
42
Seal Companysealcompany.com

This company offers engineered sealing solutions globally, specializing in O-rings, seals, gaskets, and packings for various industries including defense, oilfield, and industrial sectors

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 60 1971
43
DMI International, LLC.dmiinternational.com

Manufacturer and supplier of construction and maintenance equipment for the pipeline industry, offering quality products, engineering expertise, and world class service globally

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 53 1977
44
Walvoil Fluid Power USAwalvoilusa.com

Global manufacturer of hydraulic valves, pumps, motors, and mechatronic systems for various industries, providing integrated hydraulic and electronic solutions for major OEMs worldwide

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 43 1969
45
CORKEN - an IDEX Energy businesscorken.com

Global leader in industrial compressors, pumps, and accessories for liquefied gas transfer, air boosting, vapor recovery, with a strong commitment to customer service and innovation

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 39 n/a
46
VoiceFoundryttecdigital.com

Provider of AWS-powered digital transformation and consulting services, specializing in creating exceptional customer experiences and maximizing complex technology ecosystems

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 26 n/a
47
Topeca Coffeetopecacoffee.com

Family-owned coffee company from El Salvador and Tulsa, OK, practicing a "Seed to Cup" philosophy, ensuring freshest coffee from farm to home

Food and Beverage Services ๐Ÿ‡บ๐Ÿ‡ธ Tulsa 25 2002
48
TSI Flow Productstsiflowproducts.com

A leading provider of innovative flow control equipment, known for exceptional customer service, with locations across the US and Canada

Oil and Gas ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 23 n/a
49
MICROFACTORY MANUFACTURINGmicrofactory.tech

A global engineering custom manufacturing parts company with a verified supplier network, offering end-to-end sourcing services with cost savings benefits

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 8 2021
50
Cognitionteamcognitionteam.com

A professional services firm specializing in digital, cloud, and cyber security services, offering design and development of web and mobile applications, and enterprise-scale software solutions

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Oklahoma City 7 2018

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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