This selection of multinational companies in Louisiana includes large and mid-sized firms. Lumen Technologies provides digital connectivity solutions, while Wipro Technologies offers management consulting. MMR Group is a provider of electrical and technical services, and Lamar Advertising Company specializes in outdoor advertising. PSC Group supports refineries and chemical plants, and POOLCORP distributes swimming pool supplies. Many companies, such as Edison Chouest Offshore, HORNBECK OFFSHOREยฎ, PHI Aviation, and GIS, operate in the maritime and energy sectors.
The companies represent a mix of industries, with a notable presence in technology, business consulting, and maritime transportation. There is also a strong cluster of companies headquartered in Baton Rouge, including MMR Group, Lamar Advertising Company, and PSC Group.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Lumen Technologieslumen.com
The company provides digital connectivity solutions, utilizing their network strength to connect people, data, and applications quickly, securely, and effortlessly |
49,357 | |||
| 2 |
Wipro Technologieswipro.com
Management consulting company located in New Orleans, providing services to help businesses improve operations and achieve their goals |
16,942 | |||
| 3 |
MMR Groupmmrgrp.com
Industry-leading provider of electrical, instrumentation, and technical services across a variety of sectors, known for exceptional value, quality, and safety |
4,338 | |||
| 4 |
Lamar Advertising Companylamar.com
Offers various outdoor advertising formats, including billboards, transit, and airport displays, to help businesses reach broad audiences across the United States and Canada. |
3,761 | |||
| 5 |
PSC Grouppscgroup.com
Provider of product handling, logistics, and support services to refineries, chemical plants, and marine industries with a focus on safety, quality, and employee care |
3,200 | |||
| 6 |
POOLCORPpoolcorp.com
A global distributor of swimming pool supplies and leisure products, serving customers across North America, Europe, and Australia through diverse markets and sustainable practices |
2,993 | |||
| 7 |
Laitramlaitram.com
A global manufacturing leader with over 3,800 employees, 1300 patents, and 11 locations worldwide, committed to integrity, teamwork, and innovation |
2,789 | |||
| 8 |
Intraloxintralox.com
Global leader in conveyance solutions offering innovative technologies for various industries in over 100 countries, backed by strong guarantees and global support |
2,292 | |||
| 9 |
Edison Chouest Offshorechouest.com
A global leader in marine transportation solutions, offering diverse and technologically advanced vessels for a growing customer base worldwide |
2,078 | |||
| 10 |
HOTWORXhotworx.net
Innovative fitness program combining infrared heat and isometrics for a 30-minute workout, providing better results than traditional hot yoga routines |
1,885 | |||
| 11 |
HORNBECK OFFSHOREยฎhornbeckoffshore.com
A leading provider of technologically advanced offshore service vessels for the energy industry in the US Gulf of Mexico and Latin America Dedicated to safety and environmental protection |
1,490 | |||
| 12 |
PHI Aviationphihelico.com
A global leader in helicopter transportation, providing safe and reliable services for energy, medical, government, and military organizations with innovative solutions |
1,466 | |||
| 13 | 1,464 | ||||
| 14 | 1,257 | ||||
| 15 | 1,053 | ||||
| 16 |
Barrister Global Services Networkbarrister.com
A leading provider of IT services in the US, offering competitive pricing, multi-vendor management, and nationwide on-site support for hardware repair and maintenance |
923 | |||
| 17 |
C-Innovation, LLCc-innovation.com
Specializing in advanced subsea solutions, C-Innovation offers ROV services, subsea construction, and field development for the oil and gas sector worldwide |
913 | |||
| 18 |
Phelps Dunbar LLPphelps.com
A regional law firm with 300+ attorneys serving major commercial centers along the Gulf Coast, specializing in admiralty, business, employment, health care, insurance, and litigation services |
883 | |||
| 19 |
EPIC Pipingoneepic.com
Leading global industrial pipe fabrication organization with over 500 years of combined experience, offering turn-key solutions for various industries with cutting-edge technology |
675 | |||
| 20 |
Globalstarglobalstar.com
Provides satellite and terrestrial connectivity services, offering secure data transmission, asset tracking, and monitoring for global consumers, businesses, and government agencies. |
637 | |||
| 21 |
CenturyLink (Formerly Savvis Inc.)centurylink.com
Global communications, hosting, cloud, and IT services provider with a focus on managed hosting, colocation, and cloud solutions for business customers worldwide |
630 | |||
| 22 |
DelVal Flow Controlsdelvalflow.com
DelVal Flow Controls offers a diverse range of high-quality valves, actuation accessories, and control systems for various industries worldwide with ISO 9001-2015 compliance |
613 | |||
| 23 |
United Vision Logisticsuvlogistics.com
A nationally ranked transportation and logistics provider offering services across the US, with a strong presence in the energy industry |
607 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 24 | 601 | ||||
| 25 |
Dynamic Industries, Inc.dynamicind.com
Offshore services company specializing in piping fabrication, installation, and maintenance Provides full line energy services, accommodations, and EPCIM contracting globally |
579 | |||
| 26 |
MECO (Mechanical Equipment Company, Inc.)meco.com
A global leader in designing advanced water purification systems for various industries with locations worldwide, offering valuable and sustainable solutions |
510 | |||
| 27 |
Tulane University Celia Scott Weatherhead School of Public Health and Tropical Medicinesph.tulane.edu
A leading school of public health offering a diverse range of programs, research opportunities, and global experience for students pursuing careers in public health |
468 | |||
| 28 |
Taylors International Services, Inc.taylors-international.com
Provider of global life support services, including catering, housekeeping, base operations support, lodging, and facility management for clients worldwide in various environments |
466 | |||
| 29 |
Pinot's Palettefranchise.pinotspalette.com
An upscale art studio combining wine and painting experiences, offering franchise opportunities across the US and Canada with award-winning success |
458 | |||
| 30 |
ESS Support Services Worldwide - Gulf of Mexicoessgulf.com
Specializing in offshore and remote site catering and support services, ESS offers innovative solutions with a focus on great people, service, and results worldwide |
449 | |||
| 31 |
JM Test Systems, LLC.jmtest.com
A full-service metrology lab offering NIST Traceable calibration and repair for electronic, dimensional, and mechanical test equipment with ISO/IEC 17025 accreditation |
417 | |||
| 32 |
AFS Logisticsafs.net
Helps companies understand freight costs, optimizes shipping programs, and manages transportation services, ensuring fair payment and deserved outcomes for shippers. |
398 | |||
| 33 |
Bilfinger Salamis Incbilfinger.com
An experienced provider of asset life cycle support services to the oil and gas industry, offering integrated solutions in maintenance, repair, and operations |
343 | |||
| 34 |
Tulane University Law Schoollaw.tulane.edu
Top 50 US law school offering studies in common and civil law systems, with international connections, pro bono service, and community focus |
313 | |||
| 35 |
PECveriforce.com
A global leader in supply chain risk management solutions, providing safety training programs and compliance platforms to optimize business performance |
237 | |||
| 36 |
Quality Companiesqualitycompanies.com
A consortium of oil and gas product and service companies with four industry-leading entities, focused on quality, people, and performance Located throughout the Gulf Coast region |
226 | |||
| 37 |
AGCOagcocorp.com
An American-based company providing products and services in a specific industry (specific industry not mentioned in the description) |
221 | |||
| 38 |
The Dupuy Groupdupuygroup.com
A global logistics and storage provider with over 27 million square feet of warehouse space offering transportation, logistics, and exceptional customer service |
102 | |||
| 39 |
Dwight Andrus Insurance, a division of Hub International Gulf Southhubinternational.com
A leading insurance brokerage offering risk management, employee benefits, retirement, and wealth management services with a focus on tailored solutions and client advocacy |
91 | |||
| 40 |
Conflandey Industriesconflandey-industries.com
Transforms wire rod into drawn wire for specific applications and dimensions. Products are used globally in automotive, construction, furniture, and paper industries. |
62 | |||
| 41 |
Rabalais Lawestateplanninginlouisiana.com
Louisiana-based law firm specializing in estate planning and settlement services for clients in multiple states, with a focus on professionalism and efficiency |
17 | |||
| 42 |
Brown Realty Company of Rayvillebrownrealtyco.com
This company offers professional real estate brokerage services for farmland, timberland, and recreational properties in multiple states with over 100 years of combined experience |
14 | |||
| 43 |
Honironhoniron.com
A global manufacturing solutions provider specializing in industrial process equipment for various industries, offering innovative and cost-effective solutions to operational challenges |
11 | |||
| 44 |
Richter Pumps and Valves USA - A Unit of IDEX Corporationrichter-ct.com
A pioneering manufacturer of lined pumps, valves, and ball valves for challenging production processes, ensuring safe and high-quality operation for over 65 years |
10 | |||
| 45 |
NFP Corporate Services (LA), Inc.nfp.com
A leading provider of comprehensive insurance solutions, empowering clients with expert teams, innovative technology, and strong insurer relationships for achieving their goals |
5 | |||
| 46 |
Prime Cyber Technologiesprimecybertechnologies.com
An international company offers control systems integration, wireless communications, data management, and telecommunication solutions tailored to specific needs worldwide |
3 | |||
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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 14, 2026.
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The same list elsewhere in United States
- Multinational companies in the United States 16,191
- Multinational companies in California 2,587
- Multinational companies in New York State 2,211
- Multinational companies in Texas 1,418
- Multinational companies in Florida 897
- Multinational companies in Illinois 830
- Multinational companies in Massachusetts 637
- Multinational companies in New Jersey 623
- Multinational companies in Georgia 521
- Multinational companies in Pennsylvania 472
- Multinational companies in Michigan 467
- Multinational companies in Alabama 428
- Multinational companies in Virginia 396
- Multinational companies in Ohio 388
- Multinational companies in North Carolina 358
- Multinational companies in Washington State 288
- Multinational companies in Colorado 228
- Multinational companies in New York 1,836
- Multinational companies in San Francisco 446
- Multinational companies in Houston 402
- Multinational companies in Chicago 366
- Multinational companies in Miami 289
- Multinational companies in Atlanta 252
- Multinational companies in Boston 241