# Top 50 multinational companies in Maryland

Tamtam tracks 216 multinational companies headquartered in Maryland. This list ranks the 50 largest by number of employees on LinkedIn, led by Marriott International, Marriott Hotels and TEKsystems. Their median headcount is 4,014. Half of them were founded in 1980 or later. The most common headquarters are Bethesda (11), Hanover (6) and Rockville (6).

These multinational companies in Maryland operate primarily in hospitality, IT services, and food manufacturing. Notable examples include Marriott International, managing approximately 9,000 hotels worldwide; TEKsystems, a global solutions provider accelerating business transformation; McCormick & Company, a global leader in flavor manufacturing; and T. Rowe Price, a global asset management organization. The companies listed are generally large groups, with several employing tens of thousands of individuals.

A significant concentration of hospitality companies, including Marriott International, Marriott Hotels, Sheraton Hotels & Resorts, The Ritz-Carlton Hotel Company, L.L.C., and Westin Hotels & Resorts, are headquartered in Bethesda. This indicates a strong regional presence for this sector within Maryland.

🇺🇸 Maryland · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Marriott International](https://www.tamtam.ai/c/marriott-international-bethesda) (marriott.com)<br>Management and operation of approximately 9,000 hotels and resorts across more than 30 brands in 141 countries worldwide. | Hospitality | 🇺🇸 Bethesda | 240,261 |  |
| 2 | [Marriott Hotels](https://www.tamtam.ai/c/marriott-hotels) (marriott-hotels.marriott.com)<br>Global full-service hotels and resorts offering consistent guest experiences, functional room designs, international dining, gold standard event spaces, and extensive fitness facilities. | Hospitality | 🇺🇸 Bethesda | 44,250 |  |
| 3 | [TEKsystems](https://www.tamtam.ai/c/teksystems) (teksystems.com)<br>Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations | IT Services and IT Consulting | 🇺🇸 Hanover | 28,131 | 1983 |
| 4 | [Goodwill Industries International](https://www.tamtam.ai/c/goodwill-industries-international) (goodwill.org)<br>nonprofit organization providing education, training, and career services to disadvantaged individuals and people with disabilities for empowerment. | Non-profit Organizations | 🇺🇸 Rockville | 24,004 | 1902 |
| 5 | [Sheraton Hotels & Resorts](https://www.tamtam.ai/c/sheraton-hotels-and-resorts) (sheraton.marriott.com)<br>Global hospitality services providing innovative travel connections across hundreds of communities in over seventy countries for both local visitors and international travelers. | Hospitality | 🇺🇸 Bethesda | 21,082 | 1937 |
| 6 | [The Ritz-Carlton Hotel Company, L.L.C.](https://www.tamtam.ai/c/the-ritz-carlton-hotel-company-l-l-c) (ritzcarlton.com)<br>Global hospitality provider delivering premium hotel services and community outreach programs guided by a rigorous corporate philosophy and commitment to gold standard excellence. | Hospitality | 🇺🇸 Bethesda | 18,565 | 1983 |
| 7 | [The Johns Hopkins University](https://www.tamtam.ai/c/the-johns-hopkins-university) (jhu.edu)<br>Leading research university offering diverse academic programs across multiple campuses, fostering innovation and improving lives through education and discovery. | Higher Education | 🇺🇸 Baltimore | 18,221 |  |
| 8 | [Infinite Computer Solutions](https://www.tamtam.ai/c/infinite-computer-solutions) (infinite.com)<br>Global provider of technology modernization, digital engineering, and AI-driven IT services delivering tailored solutions across multiple industries worldwide. | IT Services and IT Consulting | 🇺🇸 Rockville | 14,901 | 2001 |
| 9 | [McCormick & Company](https://www.tamtam.ai/c/mccormick-and-company) (mccormickcorporation.com)<br>A global leader in flavor, McCormick manufactures and distributes spices, seasonings, and other flavorful products to the food industry worldwide | Food and Beverage Manufacturing | 🇺🇸 Hunt Valley | 14,000 | 1889 |
| 10 | [Under Armour](https://www.tamtam.ai/c/under-armour) (underarmour.com)<br>Design and develop innovative performance apparel, footwear, and gear focused on enhancing athletes' training, competition, and recovery experiences. | Retail Apparel and Fashion | 🇺🇸 Baltimore | 13,004 | 1996 |
| 11 | [T. Rowe Price](https://www.tamtam.ai/c/t-rowe-price) (troweprice.com)<br>Global asset management organization providing equity, fixed income, and multi-asset solutions through rigorous research and active investing for individuals, advisors, and institutional clients. | Financial Services | 🇺🇸 Baltimore | 11,000 | 1937 |
| 12 | [Ciena](https://www.tamtam.ai/c/ciena) (ciena.com)<br>Global leader in optical and routing systems, services, and automation software, building adaptive networks to meet digital demands with innovation and collaboration | Telecommunications | 🇺🇸 Hanover | 10,652 | 1992 |
| 13 | [United States Department of the Navy](https://www.tamtam.ai/c/united-states-department-of-the-navy) (navy.mil)<br>This organization is part of the Navy and is involved in activities related to naval operations, defense, and national security | Defense and Space Manufacturing | 🇺🇸 Patuxent River | 9,503 | 1950 |
| 14 | [Westin Hotels & Resorts](https://www.tamtam.ai/c/westin-hotels-and-resorts) (westin.marriott.com)<br>Provides signature wellness programs across over two hundred global locations for travelers to eat, sleep, move, feel, work and play well. | Hospitality | 🇺🇸 Bethesda | 8,533 |  |
| 15 | [Perdue Farms](https://www.tamtam.ai/c/perdue-farms) (corporate.perduefarms.com)<br>A fourth-generation, family-owned US food and agriculture business offering premium protein products through responsible practices and a focus on animal welfare | Food and Beverage Manufacturing | 🇺🇸 Salisbury | 8,392 | 1920 |
| 16 | [Catholic Relief Services](https://www.tamtam.ai/c/catholic-relief-services) (crs.org)<br>An international humanitarian agency providing assistance to people in need in over 100 countries, with high efficiency and transparency | Non-profit Organizations | 🇺🇸 Baltimore | 7,845 | 1943 |
| 17 | [Naval Air Systems Command (NAVAIR)](https://www.tamtam.ai/c/naval-air-systems-command-navair) (navair.navy.mil)<br>Delivers timely, effective, and sustainable naval aviation capabilities to ensure warfighter dominance and mission success while prioritizing safety and national defense objectives. | Defense and Space Manufacturing | 🇺🇸 Patuxent River | 7,687 |  |
| 18 | [Comfort Inn](https://www.tamtam.ai/c/comfort-inn) (choicehotels.com)<br>This company offers modern, welcoming hotels with amenities to help guests feel refreshed and ready to take on the day, focusing on owner success and growth | Hospitality | 🇺🇸 Rockville | 6,996 |  |
| 19 | [Actalent](https://www.tamtam.ai/c/actalent) (actalentservices.com)<br>Actalent specializes in providing scalable talent solutions and services globally, focusing on engineering, sciences, and professional development to drive value for clients | Business Consulting and Services | 🇺🇸 Hanover | 6,572 |  |
| 20 | [Senior Helpers](https://www.tamtam.ai/c/senior-helpers) (seniorhelpers.com)<br>Provider of in-home senior assistance with specialized training in Alzheimer's, Dementia, and Parkinson's care Recognized as a great place to work | Home Health Care Services | 🇺🇸 Towson | 6,175 | 2002 |
| 21 | [Merkle](https://www.tamtam.ai/c/merkle) (merkle.com)<br>A leading CXM company specializing in delivering personalized customer experiences through data, technology, analytics, and marketing strategies for Fortune 1000 companies | Business Consulting and Services | 🇺🇸 Columbia | 5,624 |  |
| 22 | [ESAB Corporation](https://www.tamtam.ai/c/esab-corporation) (esabcorporation.com)<br>A global leader in innovative solutions for fabrication and specialty gas control markets, focusing on continuous improvement and empowering associates worldwide | Machinery Manufacturing | 🇺🇸 North Bethesda | 5,556 |  |
| 23 | [W. R. Grace](https://www.tamtam.ai/c/w-r-grace) (grace.com)<br>Supplies catalysts, engineered materials, process technologies, fine chemicals. Industries enhance modern life. Manufactures renewable fuels, pharmaceuticals, food packaging better, faster, smarter. | Chemical Manufacturing | 🇺🇸 Columbia | 4,244 |  |
| 24 | [Jhpiego](https://www.tamtam.ai/c/jhpiego) (jhpiego.org)<br>International non-profit health organization, affiliated with Johns Hopkins University, focuses on gynecology and obstetrics, providing education and training for better health outcomes. | Non-profit Organizations | 🇺🇸 Baltimore | 4,139 | 1973 |
| 25 | [ISS \| Institutional Shareholder Services](https://www.tamtam.ai/c/iss-institutional-shareholder-services) (iss-stoxx.com)<br>A global provider of data, analytics, and insights for investors and companies, specializing in corporate governance, responsible investment solutions, and market intelligence | Financial Services | 🇺🇸 Rockville | 4,014 |  |
| 26 | [Piedmont Airlines](https://www.tamtam.ai/c/piedmont-airlines) (piedmont-airlines.com)<br>An airline with a long history of providing scheduled service to over 70 cities in the eastern US and Canada Operating the ERJ-145 aircraft | Airlines and Aviation | 🇺🇸 Salisbury | 3,883 | 1931 |
| 27 | [ESAB](https://www.tamtam.ai/c/esab) (esab.com)<br>A global leader in welding technology, offering equipment, consumables, automation, and cutting systems to improve productivity and reduce costs for manufacturers worldwide | Machinery Manufacturing | 🇺🇸 North Bethesda | 3,785 | 1904 |
| 28 | [Abt Global](https://www.tamtam.ai/c/abt-global) (abtglobal.com)<br>Global leader in research, evaluation, and program implementation addressing health, education, environment, agriculture, housing, and data collection challenges worldwide. | Professional Services | 🇺🇸 Rockville | 3,748 |  |
| 29 | [DAI](https://www.tamtam.ai/c/dai) (dai.com)<br>A global development company with over 50 years of experience tackling social and economic challenges through innovative solutions in nearly 100 countries | International Trade and Development | 🇺🇸 Bethesda | 3,623 | 1970 |
| 30 | [Allegis Group](https://www.tamtam.ai/c/allegis-group) (allegisgroup.com)<br>Providing comprehensive talent solutions worldwide through specialized companies, connecting people with opportunities and solving workforce challenges for business success. | Staffing and Recruiting | 🇺🇸 Hanover | 3,570 | 1983 |
| 31 | [Precision Medicine Group](https://www.tamtam.ai/c/precision-medicine-group) (precisionmedicinegrp.com)<br>A company founded in 2012 focused on improving the drug development process through technology, data, human expertise, and strategic acquisitions | Pharmaceutical Manufacturing | 🇺🇸 Bethesda | 3,553 | 2012 |
| 32 | [Hughes](https://www.tamtam.ai/c/hughes) (hughes.com)<br>Provides broadband equipment, services, and network operations to millions of consumers, businesses, and governments worldwide via satellite and multi-transport technologies. | Telecommunications | 🇺🇸 Germantown | 3,209 | 1971 |
| 33 | [Aloft Hotels](https://www.tamtam.ai/c/aloft-hotels) (aloft-hotels.marriott.com)<br>Aloft hotels offer unique, contemporary spaces with vibrant social scenes and innovative programming for the next generation of global travelers | Hospitality | 🇺🇸 Bethesda | 3,090 | 2007 |
| 34 | [Renaissance Hotels](https://www.tamtam.ai/c/renaissance-hotels) (marriott.com)<br>Luxury hotel chain focused on unique design, neighborhood experiences, and local immersion, encouraging guests to discover hidden gems at each location | Hospitality | 🇺🇸 Bethesda | 3,031 |  |
| 35 | [Allegis Global Solutions](https://www.tamtam.ai/c/allegis-global-solutions) (allegisglobalsolutions.com)<br>Global workforce solutions provider specializing in workforce design, management, consulting, and procurement to transform organizations and enhance competitive advantage. | Staffing and Recruiting | 🇺🇸 Hanover | 3,021 | 2001 |
| 36 | [Aston Carter](https://www.tamtam.ai/c/aston-carter) (astoncarter.com)<br>Providing specialized talent solutions in accounting, finance, HR, procurement, and supply chain to global clients including Fortune 500 companies. | Staffing and Recruiting | 🇺🇸 Hanover | 2,699 | 1997 |
| 37 | [AC Hotels by Marriott](https://www.tamtam.ai/c/ac-hotels-by-marriott) (ac-hotels.marriott.com)<br>AC Hotels by Marriott offers stylish, modern accommodations with a focus on essentials, European-inspired breakfast, flexible dining options, and a unique urban experience for travelers worldwide | Hospitality | 🇺🇸 Bethesda | 2,570 | 1988 |
| 38 | [Comfort Suites](https://www.tamtam.ai/c/comfort-suites) (choicehotels.com)<br>This company offers modern and comfortable hotel accommodations with over 1,600 properties in the US and 2,100 internationally, focusing on enabling owner success | Hospitality | 🇺🇸 Rockville | 2,550 |  |
| 39 | [The Cleaning Authority](https://www.tamtam.ai/c/the-cleaning-authority) (thecleaningauthority.com)<br>A valuable home cleaning franchise opportunity for forward-thinking entrepreneurs to invest in themselves and build a rewarding business for the future | Consumer Services | 🇺🇸 Columbia | 2,492 | 1977 |
| 40 | [Prometric](https://www.tamtam.ai/c/prometric) (prometric.com)<br>Global provider of secure test development and delivery solutions supporting test-takers worldwide to advance their careers through accessible testing services | IT Services and IT Consulting | 🇺🇸 White Marsh | 2,467 |  |
| 41 | [Health Prime](https://www.tamtam.ai/c/health-prime) (hpiinc.com)<br>Physician-owned company providing practice management solutions to help physicians focus on patients by minimizing paperwork and embracing evolving healthcare technology | IT Services and IT Consulting | 🇺🇸 National Harbor | 2,415 | 2003 |
| 42 | [Crisis24](https://www.tamtam.ai/c/crisis24) (crisis24.com)<br>Integrated risk management, crisis response, consulting, and global protective solutions firm, providing specialized services, security, and technology powered by AI worldwide | Security and Investigations | 🇺🇸 Annapolis | 2,363 |  |
| 43 | [Tenable](https://www.tamtam.ai/c/tenable) (tenable.com)<br>Exposes and closes cybersecurity gaps, unifies security visibility, insight, and action across the attack surface for organizations globally. | Computer and Network Security | 🇺🇸 Columbia | 2,361 |  |
| 44 | [SEVENTH DAY ADVENTIST CHURCH](https://www.tamtam.ai/c/seventh-day-adventist-church) (adventist.org)<br>A religious denomination based in Silver Spring, MD, focused on Seventh-day Adventist beliefs and practices | Religious Institutions | 🇺🇸 Silver Spring | 2,337 | 1863 |
| 45 | [University of Maryland School of Medicine](https://www.tamtam.ai/c/university-of-maryland-school-of-medicine) (medschool.umaryland.edu)<br>Leading biomedical research institution with top-tier faculty and extensive global reach, dedicated to advancing innovative research in virology, genomics, and global health | Research Services | 🇺🇸 | 2,179 | 1807 |
| 46 | [Marken](https://www.tamtam.ai/c/marken) (marken.com)<br>Experts orchestrate millions of temperature-controlled shipments annually for drug supply, advanced therapies, and medical devices, prioritizing patient needs and quality. | Transportation, Logistics, Supply Chain and Storage | 🇺🇸 Durham | 2,175 | 1980 |
| 47 | [Precision For Medicine](https://www.tamtam.ai/c/precision-for-medicine) (precisionformedicine.com)<br>A global precision medicine clinical research organization improving therapeutics development with integrated clinical operations, laboratory expertise, and advanced data sciences | Biotechnology Research | 🇺🇸 Bethesda | 2,060 |  |
| 48 | [ADRA International](https://www.tamtam.ai/c/adra-international) (adra.org)<br>ADRA provides unconditional assistance to families worldwide by offering essentials, livelihood support, health care, education, disaster relief, and empowerment programs | Non-profit Organizations | 🇺🇸 Silver Spring | 2,018 | 1983 |
| 49 | [Choice Hotels International](https://www.tamtam.ai/c/choice-hotels-international) (choicehotels.com)<br>Global lodging franchisor managing 22 brands across upscale and midscale segments, supporting thousands of hotels and offering a rewards program for travelers. | Hospitality | 🇺🇸 North Bethesda | 2,000 |  |
| 50 | [Apex Tool Group, LLC](https://www.tamtam.ai/c/apex-tool-group-llc) (apextoolgroup.com)<br>Global company promoting diversity, inclusion, and respect to create a positive, safe, and inspiring work environment for associates. | Manufacturing | 🇺🇸 Sparks Glencoe | 1,971 | 2010 |

## 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.

## More company lists in Maryland

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- [IT Services and IT Consulting companies in Maryland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-maryland) (189)
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- [Consulting firms in Maryland](https://www.tamtam.ai/l/consulting-firms-maryland) (112)
- [Companies with in-house R&D in Maryland](https://www.tamtam.ai/l/r-and-d-companies-maryland) (107)
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- [Retail chains in Maryland](https://www.tamtam.ai/l/retail-chains-maryland) (91)
- [Public sector organisations in Maryland](https://www.tamtam.ai/l/public-sector-organisations-maryland) (91)
- [Financial services firms in Maryland](https://www.tamtam.ai/l/financial-services-firms-maryland) (88)
- [Aerospace and defence companies in Maryland](https://www.tamtam.ai/l/aerospace-and-defense-companies-maryland) (80)
- [Construction companies in Maryland](https://www.tamtam.ai/l/construction-companies-maryland) (80)
- [Manufacturers in Maryland](https://www.tamtam.ai/l/manufacturers-maryland) (75)
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- [SaaS companies in Maryland](https://www.tamtam.ai/l/saas-companies-maryland) (52)
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## The same list elsewhere in United States

- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,592)
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- [Multinational companies in Pennsylvania](https://www.tamtam.ai/l/multinational-companies-pennsylvania) (472)
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- [Multinational companies in Washington State](https://www.tamtam.ai/l/multinational-companies-washington-state) (288)
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- [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)
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Source: https://www.tamtam.ai/l/multinational-companies-maryland