These multinational companies in Houston are mostly large groups in the energy sector. Hewlett Packard Enterprise is a global edge-to-cloud company. SLB develops technologies to unlock energy access while reducing carbon emissions. Baker Hughes provides innovative solutions for the energy and industrial sectors, and Halliburton engineers solutions to maximize energy asset value. Sysco distributes food and related products, and Houston Methodist is a comprehensive health system.
The data shows that many of these companies were founded in the 21st century, such as Tenaris (2002), LyondellBasell (2007), and ConocoPhillips (2012). The prevalence of oil and gas companies like Chevron, NOV, and Oxy, alongside IT services firms like KBR, Inc., indicates a mix of traditional and technology-driven industries.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Hewlett Packard Enterprisehpe.com
This company is a global edge-to-cloud company that drives technology and innovation to fulfill its passion and purpose |
90,021 | |||
| 2 | 79,707 | ||||
| 3 |
Baker Hughesbakerhughes.com
Energy technology company providing innovative solutions globally, focusing on safety, efficiency, and sustainability in the energy and industrial sectors |
67,440 | |||
| 4 |
Halliburtonhalliburton.com
Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. |
60,277 | |||
| 5 |
Chevronchevron.com
The company values its people and their innovation in tackling energy challenges, fostering open and respectful communication on LinkedIn |
55,495 | |||
| 6 | 37,645 | ||||
| 7 | 31,974 | ||||
| 8 | 31,433 | ||||
| 9 |
McDermott International, Ltdmcdermott.com
Engineering and construction solutions for global energy industry, focusing on sustainable energy infrastructure and energy transition projects worldwide. |
23,162 | |||
| 10 |
Houston Methodisthoustonmethodist.org
Comprehensive health system with hospitals, research institute, residency programs, outpatient and emergency care centers serving Greater Houston area. |
22,002 | |||
| 11 |
Tenaristenaris.com
A leading supplier of tubes and services for the energy industry and other industrial applications, with a global workforce committed to continuous improvement |
20,000 | |||
| 12 |
Cameron Productsslb.com
A leading provider of flow equipment products, systems, and services for the global oil, gas, and process industries, with a strong global network |
18,396 | |||
| 13 |
ConocoPhillipsconocophillips.com
A global oil and gas company focusing on safely finding and delivering energy worldwide while fostering a great workplace and community |
16,478 | |||
| 14 | 16,319 | ||||
| 15 |
LyondellBaselllyondellbasell.com
Leading global chemical company producing innovative polymers and polyolefins for sustainable transportation, food safety, clean water, and healthcare applications. |
15,172 | |||
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. | |||||
| 16 |
Phillips 66phillips66.com
A global energy company focused on manufacturing petroleum products, natural gas processing, and petrochemical production, prioritizing safety, honor, and commitment |
14,000 | |||
| 17 |
Oceaneeringoceaneering.com
Global technology company providing engineered services, products, and robotic solutions to offshore energy, defense, aerospace, and manufacturing industries worldwide |
13,838 | |||
| 18 |
Tailored Brands, Inc.tailoredbrands.com
Company focuses on enhancing customer appearance and confidence for important moments, emphasizing inclusivity, integrity, teamwork, and continuous improvement. |
11,474 | |||
| 19 |
Men's Wearhousemenswearhouse.com
They help people love how they look for important moments by offering tailored clothing, valuing customer satisfaction, teamwork, continuous improvement, diversity, and integrity. |
11,000 | |||
| 20 | 8,906 | ||||
| 21 |
BMC Softwarebmc.com
It provides open, scalable solutions for complex IT challenges, helping organizations innovate and become Autonomous Digital Enterprises for future success. |
8,773 | |||
| 22 |
Nabors Industriesnabors.com
Provider of advanced drilling rigs, automation, and engineering solutions for safe, efficient, and responsible energy production worldwide. |
7,492 | |||
| 23 |
Stewart Titlestewart.com
Global provider of title services and personalized real estate solutions facilitating property ownership through specialized industry expertise and customized transaction support services. |
7,410 | |||
| 24 |
OneSubseaonesubsea.slb.com
A leading subsea technology provider focused on innovation to improve asset performance, increase energy efficiency, reduce emissions, and accelerate the energy transition |
7,149 | |||
| 25 |
Service Corporation Internationalsci-corp.com
Leading provider of death care products and services across North America with over 1,500 funeral service locations and 470 cemeteries |
7,085 | |||
| 26 |
Westlakewestlake.com
Manufacturing and supplying petrochemicals, plastics, and building products globally, enhancing daily life through quality products and services. |
6,574 | |||
| 27 |
Noble Corporationnoblecorp.com
Leading offshore drilling contractor operating advanced fleet focused on ultra-deepwater and high-specification jackup drilling worldwide. |
6,572 | |||
| 28 |
Seadrillseadrill.com
Deepwater drilling company providing modern fleet, experienced crews, advanced technologies to unlock oil and gas resources for various oil companies. |
5,896 | |||
| 29 | 5,802 | ||||
| 30 | 5,476 | ||||
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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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The same list elsewhere in United States
- Multinational companies in the United States 16,197
- Multinational companies in California 2,592
- Multinational companies in New York State 2,216
- Multinational companies in Texas 1,418
- Multinational companies in Florida 897
- Multinational companies in Illinois 831
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- Multinational companies in New Jersey 624
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- Multinational companies in Pennsylvania 472
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- Multinational companies in Alabama 416
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- Multinational companies in Boston 241