# 30 leading multinational companies in Houston

Tamtam tracks 402 multinational companies headquartered in Houston. This list ranks the 30 largest by number of employees on LinkedIn, led by Hewlett Packard Enterprise, SLB and Baker Hughes. Their median headcount is 15,172. Half of them were founded in 1973 or later.

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.

🇺🇸 Houston · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Hewlett Packard Enterprise](https://www.tamtam.ai/c/hewlett-packard-enterprise) (hpe.com)<br>This company is a global edge-to-cloud company that drives technology and innovation to fulfill its passion and purpose | IT Services and IT Consulting | 🇺🇸 Houston | 90,021 |  |
| 2 | [SLB](https://www.tamtam.ai/c/slb-houston) (slb.com)<br>Global innovators developing advanced technologies to unlock energy access while reducing carbon emissions through sustainable engineering and diverse technical change maker expertise. | Technology, Information and Internet | 🇺🇸 Houston | 79,707 |  |
| 3 | [Baker Hughes](https://www.tamtam.ai/c/baker-hughes-houston) (bakerhughes.com)<br>Energy technology company providing innovative solutions globally, focusing on safety, efficiency, and sustainability in the energy and industrial sectors | Energy Technology | 🇺🇸 Houston | 67,440 |  |
| 4 | [Halliburton](https://www.tamtam.ai/c/halliburton) (halliburton.com)<br>Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. | Oil and Gas | 🇺🇸 Houston | 60,277 | 1919 |
| 5 | [Chevron](https://www.tamtam.ai/c/chevron) (chevron.com)<br>The company values its people and their innovation in tackling energy challenges, fostering open and respectful communication on LinkedIn | Oil and Gas | 🇺🇸 Houston | 55,495 |  |
| 6 | [NOV](https://www.tamtam.ai/c/nov) (nov.com)<br>Provider of technology-driven solutions for the global energy industry, enabling safe energy production, environmental impact reduction, and advancing towards a more sustainable future | Oil and Gas | 🇺🇸 Houston | 37,645 |  |
| 7 | [Sysco](https://www.tamtam.ai/c/sysco) (sysco.com)<br>Global leader in selling, marketing, and distributing food and related products to customers preparing meals away from home, including restaurants and facilities. | Food and Beverage Services | 🇺🇸 Houston | 31,974 |  |
| 8 | [KBR, Inc.](https://www.tamtam.ai/c/kbr-inc) (kbr.com)<br>Providing science, technology, and engineering solutions to governments and companies worldwide addressing significant contemporary challenges and opportunities. | IT Services and IT Consulting | 🇺🇸 Houston | 31,433 |  |
| 9 | [McDermott International, Ltd](https://www.tamtam.ai/c/mcdermott-international-ltd) (mcdermott.com)<br>Engineering and construction solutions for global energy industry, focusing on sustainable energy infrastructure and energy transition projects worldwide. | Oil and Gas | 🇺🇸 Houston | 23,162 |  |
| 10 | [Houston Methodist](https://www.tamtam.ai/c/houston-methodist) (houstonmethodist.org)<br>Comprehensive health system with hospitals, research institute, residency programs, outpatient and emergency care centers serving Greater Houston area. | Hospitals and Health Care | 🇺🇸 Houston | 22,002 |  |
| 11 | [Tenaris](https://www.tamtam.ai/c/tenaris) (tenaris.com)<br>A leading supplier of tubes and services for the energy industry and other industrial applications, with a global workforce committed to continuous improvement | Oil and Gas | 🇺🇸 Houston | 20,000 | 2002 |
| 12 | [Cameron Products](https://www.tamtam.ai/c/cameron-products) (slb.com)<br>A leading provider of flow equipment products, systems, and services for the global oil, gas, and process industries, with a strong global network | Oil and Gas | 🇺🇸 Houston | 18,396 |  |
| 13 | [ConocoPhillips](https://www.tamtam.ai/c/conocophillips) (conocophillips.com)<br>A global oil and gas company focusing on safely finding and delivering energy worldwide while fostering a great workplace and community | Oil and Gas | 🇺🇸 Houston | 16,478 | 2012 |
| 14 | [Oxy](https://www.tamtam.ai/c/oxy) (oxy.com)<br>An international energy company with assets in the US, Middle East, and North Africa, focused on oil production, midstream services, chemical manufacturing, and carbon reduction technologies | Oil and Gas | 🇺🇸 Houston | 16,319 |  |
| 15 | [LyondellBasell](https://www.tamtam.ai/c/lyondellbasell-houston) (lyondellbasell.com)<br>Leading global chemical company producing innovative polymers and polyolefins for sustainable transportation, food safety, clean water, and healthcare applications. | Chemical Manufacturing | 🇺🇸 Houston | 15,172 | 2007 |
| 16 | [Phillips 66](https://www.tamtam.ai/c/phillips-66) (phillips66.com)<br>A global energy company focused on manufacturing petroleum products, natural gas processing, and petrochemical production, prioritizing safety, honor, and commitment | Oil and Gas | 🇺🇸 Houston | 14,000 |  |
| 17 | [Oceaneering](https://www.tamtam.ai/c/oceaneering) (oceaneering.com)<br>Global technology company providing engineered services, products, and robotic solutions to offshore energy, defense, aerospace, and manufacturing industries worldwide | Oil and Gas | 🇺🇸 Houston | 13,838 | 1964 |
| 18 | [Tailored Brands, Inc.](https://www.tamtam.ai/c/tailored-brands-inc) (tailoredbrands.com)<br>Company focuses on enhancing customer appearance and confidence for important moments, emphasizing inclusivity, integrity, teamwork, and continuous improvement. | Retail Apparel and Fashion | 🇺🇸 Houston | 11,474 |  |
| 19 | [Men's Wearhouse](https://www.tamtam.ai/c/men-s-wearhouse) (menswearhouse.com)<br>They help people love how they look for important moments by offering tailored clothing, valuing customer satisfaction, teamwork, continuous improvement, diversity, and integrity. | Retail | 🇺🇸 Houston | 11,000 | 1973 |
| 20 | [Expro](https://www.tamtam.ai/c/expro) (expro.com)<br>This company provides innovative technologies and high-quality data to support decision-making in energy operations, focusing on well construction and production | Oil and Gas | 🇺🇸 Houston | 8,906 | 1973 |
| 21 | [BMC Software](https://www.tamtam.ai/c/bmc-software) (bmc.com)<br>It provides open, scalable solutions for complex IT challenges, helping organizations innovate and become Autonomous Digital Enterprises for future success. | IT Services and IT Consulting | 🇺🇸 Houston | 8,773 | 1980 |
| 22 | [Nabors Industries](https://www.tamtam.ai/c/nabors-industries) (nabors.com)<br>Provider of advanced drilling rigs, automation, and engineering solutions for safe, efficient, and responsible energy production worldwide. | Oil and Gas | 🇺🇸 Houston | 7,492 | 1952 |
| 23 | [Stewart Title](https://www.tamtam.ai/c/stewart-title) (stewart.com)<br>Global provider of title services and personalized real estate solutions facilitating property ownership through specialized industry expertise and customized transaction support services. | Insurance | 🇺🇸 Houston | 7,410 | 1893 |
| 24 | [OneSubsea](https://www.tamtam.ai/c/onesubsea) (onesubsea.slb.com)<br>A leading subsea technology provider focused on innovation to improve asset performance, increase energy efficiency, reduce emissions, and accelerate the energy transition | Oil and Gas | 🇺🇸 Houston | 7,149 | 2023 |
| 25 | [Service Corporation International](https://www.tamtam.ai/c/service-corporation-international) (sci-corp.com)<br>Leading provider of death care products and services across North America with over 1,500 funeral service locations and 470 cemeteries | Individual and Family Services | 🇺🇸 Houston | 7,085 |  |
| 26 | [Westlake](https://www.tamtam.ai/c/westlake) (westlake.com)<br>Manufacturing and supplying petrochemicals, plastics, and building products globally, enhancing daily life through quality products and services. | Chemical Manufacturing | 🇺🇸 Houston | 6,574 | 1986 |
| 27 | [Noble Corporation](https://www.tamtam.ai/c/noble-corporation) (noblecorp.com)<br>Leading offshore drilling contractor operating advanced fleet focused on ultra-deepwater and high-specification jackup drilling worldwide. | Oil and Gas | 🇺🇸 Houston | 6,572 | 1921 |
| 28 | [Seadrill](https://www.tamtam.ai/c/seadrill) (seadrill.com)<br>Deepwater drilling company providing modern fleet, experienced crews, advanced technologies to unlock oil and gas resources for various oil companies. | Oil and Gas | 🇺🇸 Houston | 5,896 | 2005 |
| 29 | [Hines](https://www.tamtam.ai/c/hines) (hines.com)<br>Global real estate investment, development, and property management firm with €871B in assets across residential, logistics, retail, office, and mixed-use properties Commitment to net zero carbon by 2040 | Real Estate | 🇺🇸 Houston | 5,802 | 1957 |
| 30 | [SEG](https://www.tamtam.ai/c/seg-houston) (seg.org)<br>A global society promoting collaboration and thought leadership in applied geophysics through education, professional development, and community engagement worldwide | Non-profit Organizations | 🇺🇸 Houston | 5,476 | 1930 |

## 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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Source: https://www.tamtam.ai/l/multinational-companies-houston