# The 30 largest multinational companies in Arlington

Tamtam tracks 71 multinational companies headquartered in Arlington. This list ranks the 30 largest by number of employees on LinkedIn, led by US Army, RTX and Boeing. Their median headcount is 2,865. Half of them were founded in 1971 or later.

These Arlington-based companies are predominantly large organizations operating in defense, aerospace, and related sectors. Key players include the US Army, focusing on land dominance, and RTX, involved in aviation and space systems. Boeing is a global aerospace leader, while Raytheon develops integrated air and missile defense solutions. CoStar Group provides real estate information, and Six Flags manages amusement parks.

A notable pattern among these companies is the strong presence of the defense and aerospace industries, reflecting Arlington's role as a hub for national security. Companies like Leonardo DRS and the United States Department of the Army further illustrate this concentration. Beyond defense, there's a mix of sectors, including The Nature Conservancy in conservation, The AES Corporation in utilities, and Lidl US in retail.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [US Army](https://www.tamtam.ai/c/us-army) (usarmybasic.com)<br>Providing prompt, sustained land dominance across full military operations spectrum, supporting combatant commanders in national defense and warfare. | Armed Forces | 🇺🇸 Arlington | 367,627 | 1775 |
| 2 | [RTX](https://www.tamtam.ai/c/rtx) (rtx.com)<br>Aerospace and defense operations through three business units focused on solving complex problems within aviation, space systems, and military technology sectors worldwide. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Arlington | 139,657 |  |
| 3 | [Boeing](https://www.tamtam.ai/c/boeing) (boeing.com)<br>A global aerospace leader providing commercial airplanes, defense, space systems, and services, focused on innovation, customer delivery, and employee growth | Aviation and Aerospace Component Manufacturing | 🇺🇸 Arlington | 129,130 | 1916 |
| 4 | [Raytheon](https://www.tamtam.ai/c/raytheon) (rtx.com)<br>Develops integrated air and missile defense, advanced sensors, space-based systems, hypersonics, and cyber solutions to provide next-generation protection and high-performance military effectors. | Defense and Space Manufacturing | 🇺🇸 Arlington | 48,589 | 1922 |
| 5 | [CoStar Group](https://www.tamtam.ai/c/costar-group) (costargroup.com)<br>A leading provider of online real estate marketplaces, information, and analytics for commercial and residential properties, with a global presence | Real Estate | 🇺🇸 Arlington | 11,725 | 1987 |
| 6 | [Six Flags](https://www.tamtam.ai/c/six-flags) (sixflags.com)<br>Large scale amusement park operations across North America following a merger to manage diverse entertainment venues and regional theme park destinations. | Entertainment Providers | 🇺🇸 Arlington | 9,357 | 1961 |
| 7 | [The Nature Conservancy](https://www.tamtam.ai/c/the-nature-conservancy) (nature.org)<br>Protecting and conserving natural resources through science-based, community-driven efforts to ensure a sustainable future for all life. | Non-profit Organizations | 🇺🇸 Arlington | 7,441 | 1951 |
| 8 | [Leonardo DRS](https://www.tamtam.ai/c/leonardo-drs) (leonardodrs.com)<br>Providing advanced sensing, network computing, force protection, and electric power propulsion technologies to global national security customers through practical, high-performance defense innovation. | Defense and Space Manufacturing | 🇺🇸 Arlington | 6,551 | 1969 |
| 9 | [United States Department of the Army](https://www.tamtam.ai/c/united-states-department-of-the-army) (army.mil)<br>The Department of the Army is a federal government agency within the Department of Defense responsible for organizing and leading the United States Army | Government Administration | 🇺🇸 Arlington | 6,218 | 1947 |
| 10 | [The AES Corporation](https://www.tamtam.ai/c/the-aes-corporation) (aes.com)<br>Energy company focused on innovative, customized solutions for organizations with a collaborative approach, empowering growth and driving impact in the energy sector | Utilities | 🇺🇸 Arlington | 5,910 | 1981 |
| 11 | [APL](https://www.tamtam.ai/c/apl) (apl.com)<br>Ocean transportation and in-country logistics services with U.S. flagged vessels connecting North America to key global military locations. | Maritime Transportation | 🇺🇸 Arlington | 5,040 | 1848 |
| 12 | [GTT](https://www.tamtam.ai/c/gtt-arlington) (gtt.net)<br>Global managed network and security services provider offering advanced cloud, networking, and security solutions with professional services and exceptional support worldwide | Telecommunications | 🇺🇸 Arlington | 3,917 |  |
| 13 | [Evolent](https://www.tamtam.ai/c/evolent) (evolent.com)<br>Partnering with health plans and providers to deliver evidence-based, affordable, and compassionate care for complex health conditions nationwide. | Hospitals and Health Care | 🇺🇸 Arlington | 3,799 | 2011 |
| 14 | [Lidl US](https://www.tamtam.ai/c/lidl-us) (careers.lidl.com)<br>Family-owned business offering high-quality goods at affordable prices Operates over 11,500 stores in 32 countries, growing rapidly in the US Join us for career development opportunities | Retail | 🇺🇸 Arlington | 3,063 | 1973 |
| 15 | [2U](https://www.tamtam.ai/c/2u) (2u.com)<br>A leading platform providing free-to-degree online education, connecting over 81 million learners with top universities and industry experts worldwide | Education Administration Programs | 🇺🇸 Arlington | 2,865 | 2008 |
| 16 | [DoDEA](https://www.tamtam.ai/c/dodea) (dodea.edu)<br>A global school system catering to US military and eligible DoD civilian families, providing world-class education services worldwide | Education Administration Programs | 🇺🇸 Arlington | 2,709 |  |
| 17 | [TechnoServe](https://www.tamtam.ai/c/technoserve) (technoserve.org)<br>A nonprofit organization empowering people in the developing world to build competitive farms, businesses, and industries to alleviate poverty | Non-profit Organizations | 🇺🇸 Arlington | 2,599 | 1968 |
| 18 | [AV](https://www.tamtam.ai/c/av) (avinc.com)<br>Innovative solutions provider specializing in unmanned systems and high-altitude pseudo-satellites, empowering military and commercial customers with actionable intelligence for smarter decisions | Defense and Space Manufacturing | 🇺🇸 Arlington | 2,466 | 1971 |
| 19 | [American Institutes for Research](https://www.tamtam.ai/c/american-institutes-for-research) (air.org)<br>A nonprofit research institution providing evidence-based solutions for urgent challenges in education, health, workforce, human services, and international development worldwide | Research Services | 🇺🇸 Arlington | 2,010 | 1946 |
| 20 | [Fluence](https://www.tamtam.ai/c/fluence) (fluenceenergy.com)<br>Global leader in energy storage products and services, providing modular solutions, comprehensive services, and AI-enabled software for managing renewable energy and storage | Renewable Energy Semiconductor Manufacturing | 🇺🇸 Arlington | 1,962 | 2018 |
| 21 | [CEB, now Gartner](https://www.tamtam.ai/c/ceb-now-gartner) (gartner.com)<br>Providing research, advisory services, and technology solutions to help organizations make informed decisions and achieve their strategic priorities for future success | IT Services and IT Consulting | 🇺🇸 Arlington | 1,934 | 1983 |
| 22 | [DT Global](https://www.tamtam.ai/c/dt-global) (dt-global.com)<br>An international organization focused on sustainable development, innovation, and solving complex problems in peacebuilding, governance, economic development, environment, and human development sectors | International Trade and Development | 🇺🇸 Arlington | 1,912 | 2019 |
| 23 | [Conservation International](https://www.tamtam.ai/c/conservation-international) (conservation.org)<br>Protecting critical natural areas globally through science, policy, finance, and partnerships to secure benefits nature provides to humanity. | Non-profit Organizations | 🇺🇸 Arlington | 1,756 | 1987 |
| 24 | [Ashoka](https://www.tamtam.ai/c/ashoka) (ashoka.org)<br>Global leader in social innovation, empowering social entrepreneurs to create impactful change and new societal frameworks | Civic and Social Organizations | 🇺🇸 Arlington | 1,729 | 1982 |
| 25 | [POLITICO](https://www.tamtam.ai/c/politico) (politico.com)<br>Global news and information company focusing on politics and policy, with a team of journalists covering various locations and providing authoritative, nonpartisan journalism | Online Audio and Video Media | 🇺🇸 Arlington | 1,626 | 2007 |
| 26 | [GardaWorld Federal Services](https://www.tamtam.ai/c/gardaworld-federal-services) (garda-federal.com)<br>A US-based company specializing in security, medical, logistics, and support services for government and commercial clients domestically and internationally | Security and Investigations | 🇺🇸 Arlington | 1,502 |  |
| 27 | [Martin Sprocket & Gear](https://www.tamtam.ai/c/martin-sprocket-and-gear) (martinsprocket.com)<br>Manufacturer of power transmission components, material handling products, and industrial hand tools with a focus on fast production and large inventories for superior service | Industrial Machinery Manufacturing | 🇺🇸 Arlington | 1,409 | 1951 |
| 28 | [Deloitte](https://www.tamtam.ai/c/deloitte-arlington) (deloitte.com)<br>A global professional services organization specializing in consulting, financial advisory, risk management, tax, and auditing services for clients in various industries | Business Consulting and Services | 🇺🇸 Arlington | 1,383 |  |
| 29 | [Oil States Industries](https://www.tamtam.ai/c/oil-states-industries) (oilstates.com)<br>A technology company advancing the energy future with innovative equipment, systems, and services for energy, industrial, and military markets worldwide | Oil and Gas | 🇺🇸 Arlington | 1,356 | 1942 |
| 30 | [International Justice Mission](https://www.tamtam.ai/c/international-justice-mission) (ijm.org)<br>Human rights agency fighting against slavery, sexual exploitation, and oppression worldwide Working with governments to rescue victims, prosecute perpetrators, and strengthen justice systems | Non-profit Organizations | 🇺🇸 Arlington | 1,344 | 1997 |

## 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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- [Manufacturers in Arlington](https://www.tamtam.ai/l/manufacturers-arlington) (27)

## The same list elsewhere in United States

- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
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- [Multinational companies in Texas](https://www.tamtam.ai/l/multinational-companies-texas) (1,418)
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- [Multinational companies in Illinois](https://www.tamtam.ai/l/multinational-companies-illinois) (831)
- [Multinational companies in Massachusetts](https://www.tamtam.ai/l/multinational-companies-massachusetts) (637)
- [Multinational companies in New Jersey](https://www.tamtam.ai/l/multinational-companies-new-jersey) (624)
- [Multinational companies in Georgia](https://www.tamtam.ai/l/multinational-companies-georgia) (521)
- [Multinational companies in Pennsylvania](https://www.tamtam.ai/l/multinational-companies-pennsylvania) (472)
- [Multinational companies in Michigan](https://www.tamtam.ai/l/multinational-companies-michigan) (468)
- [Multinational companies in Alabama](https://www.tamtam.ai/l/multinational-companies-alabama) (416)
- [Multinational companies in Virginia](https://www.tamtam.ai/l/multinational-companies-virginia) (396)
- [Multinational companies in Ohio](https://www.tamtam.ai/l/multinational-companies-ohio) (390)
- [Multinational companies in North Carolina](https://www.tamtam.ai/l/multinational-companies-north-carolina) (358)
- [Multinational companies in Washington State](https://www.tamtam.ai/l/multinational-companies-washington-state) (288)
- [Multinational companies in Colorado](https://www.tamtam.ai/l/multinational-companies-colorado) (228)
- [Multinational companies in New York](https://www.tamtam.ai/l/multinational-companies-new-york) (1,836)
- [Multinational companies in San Francisco](https://www.tamtam.ai/l/multinational-companies-san-francisco) (446)
- [Multinational companies in Houston](https://www.tamtam.ai/l/multinational-companies-houston) (402)
- [Multinational companies in Chicago](https://www.tamtam.ai/l/multinational-companies-chicago) (366)
- [Multinational companies in Miami](https://www.tamtam.ai/l/multinational-companies-miami) (289)
- [Multinational companies in Atlanta](https://www.tamtam.ai/l/multinational-companies-atlanta) (252)
- [Multinational companies in Boston](https://www.tamtam.ai/l/multinational-companies-boston) (241)

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