# List of multinational companies in Connecticut

Tamtam tracks 220 multinational companies headquartered in Connecticut. This list ranks the 50 largest by number of employees on LinkedIn, led by The Cigna Group, Xerox and XPO. Their median headcount is 6,549. Half of them were founded in 1978 or later. The most common headquarters are Stamford (10), Norwalk (5) and Shelton (5).

This selection of multinational companies in Connecticut showcases a diverse economic landscape, primarily featuring large corporations. Key players include The Cigna Group, a global health company, and Xerox, which provides innovative technology solutions for the workplace. XPO is a global transportation company, while Pratt & Whitney designs and manufactures advanced propulsion systems for aircraft. The Hartford offers insurance and protection services, and Yale University is a research institution.

A notable pattern among these companies is the concentration of headquarters in specific cities. For example, Norwalk hosts Xerox, Booking Holdings, and FactSet, while Stamford is home to HARMAN International, Gartner, and United Rentals. This indicates a clustering of significant corporate presence within a few urban centers in Connecticut.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [The Cigna Group](https://www.tamtam.ai/c/the-cigna-group) (thecignagroup.com)<br>Global health company offering insurance products and health services, partnering worldwide to improve individual and community vitality. | Hospitals and Health Care | 🇺🇸 Bloomfield | 50,174 |  |
| 2 | [Xerox](https://www.tamtam.ai/c/xerox) (xerox.com)<br>It provides innovative technology solutions for the workplace, focusing on print technology, software, services, and financial solutions for clients. | Business Consulting and Services | 🇺🇸 Norwalk | 47,247 |  |
| 3 | [XPO](https://www.tamtam.ai/c/xpo-greenwich) (xpo.com)<br>A global transportation company offering top-tier solutions to leading companies, with diverse opportunities for career growth and impactful work | Truck Transportation | 🇺🇸 Greenwich | 38,917 |  |
| 4 | [GXO Logistics, Inc.](https://www.tamtam.ai/c/gxo-logistics-inc) (gxo.com)<br>Providing innovative opportunities in logistics through advanced automation, benefiting customers, employees, and investors alike | Transportation, Logistics, Supply Chain and Storage | 🇺🇸 Greenwich | 36,174 |  |
| 5 | [Pratt & Whitney](https://www.tamtam.ai/c/pratt-and-whitney) (rtx.com)<br>Design and manufacture advanced propulsion systems for aircraft, enabling global connectivity, economic growth, and national defense. | Aviation and Aerospace Component Manufacturing | 🇺🇸 East Hartford | 30,378 |  |
| 6 | [Cigna Healthcare](https://www.tamtam.ai/c/cigna-healthcare) (cigna.com)<br>Benefits provider, guides customers through healthcare system, empowering them with information and insight to improve health and vitality. | Hospitals and Health Care | 🇺🇸 Bloomfield | 29,662 |  |
| 7 | [Stanley Black & Decker, Inc.](https://www.tamtam.ai/c/stanley-black-and-decker-inc) (stanleyblackanddecker.com)<br>Provider of tools, fasteners, and infrastructure systems supporting home repair, automotive security, construction, and energy industries with innovation and safety. | Manufacturing | 🇺🇸 New Britain | 29,460 |  |
| 8 | [HARMAN International](https://www.tamtam.ai/c/harman-international) (harman.com)<br>Designs and manufactures premium audio products and automotive electronics, enabling smarter, safer, and immersive in-cabin vehicle experiences worldwide. | Computers and Electronics Manufacturing | 🇺🇸 Stamford | 27,936 | 1980 |
| 9 | [SS&C Technologies](https://www.tamtam.ai/c/ss-and-c-technologies) (ssctech.com)<br>Provider of cloud-based software and solutions for financial and healthcare industries, serving over 22,000 companies globally. | Software Development | 🇺🇸 Windsor | 27,478 | 1986 |
| 10 | [Gartner](https://www.tamtam.ai/c/gartner) (gartner.com)<br>A global company providing expert-led research and data-driven insights to help executives make faster, smarter decisions and achieve stronger performance | Information Services | 🇺🇸 Stamford | 22,206 | 1979 |
| 11 | [The Hartford](https://www.tamtam.ai/c/the-hartford) (thehartford.com)<br>The company goes beyond providing insurance to protect individuals and businesses, making an impact through human achievement and comprehensive protection | Financial Services | 🇺🇸 Hartford | 21,627 | 1810 |
| 12 | [Yale University](https://www.tamtam.ai/c/yale-university) (news.yale.edu)<br>Research university fostering global connections, creativity, and innovation, emphasizing student learning and positive worldwide impact. | Higher Education | 🇺🇸 New Haven | 19,675 |  |
| 13 | [Booking Holdings (NASDAQ: BKNG)](https://www.tamtam.ai/c/booking-holdings-nasdaq-bkng) (bookingholdings.com)<br>Global provider of online travel & related services, offering booking options in over 220 countries through multiple brands, operating in 40+ languages worldwide | Technology, Information and Internet | 🇺🇸 Norwalk | 18,737 |  |
| 14 | [United Rentals](https://www.tamtam.ai/c/united-rentals) (unitedrentals.com)<br>Largest equipment rental company providing construction, industrial, and specialty solutions with extensive fleet, safety training, and 24/7 support. | Construction | 🇺🇸 Stamford | 16,511 | 1997 |
| 15 | [FactSet](https://www.tamtam.ai/c/factset) (factset.com)<br>Open financial data and software solutions for investment professionals worldwide providing access to analytics for crucial decision making and consistent client service. | Financial Services | 🇺🇸 Norwalk | 15,211 | 1978 |
| 16 | [Pitney Bowes](https://www.tamtam.ai/c/pitney-bowes) (pitneybowes.com)<br>Provides digital shipping solutions, mailing innovation, and financial services to businesses and government entities worldwide, simplifying mail and parcel sending. | Software Development | 🇺🇸 Shelton | 12,611 | 1920 |
| 17 | [ESPN](https://www.tamtam.ai/c/espn-bristol) (jobs.disneycareers.com)<br>Leading multinational sports entertainment company with a wide range of multimedia assets including TV networks, radio, online platforms, magazines, and sports-themed restaurants | Broadcast Media Production and Distribution | 🇺🇸 Bristol | 11,732 |  |
| 18 | [GeBBS Healthcare Solutions](https://www.tamtam.ai/c/gebbs-healthcare-solutions) (gebbs.com)<br>A leading provider of Revenue Cycle Management services and Risk Adjustment solutions, utilizing innovative technology and a global workforce to improve financial performance for clients | Hospitals and Health Care | 🇺🇸 East Haven | 11,612 | 2005 |
| 19 | [SHRW, LLC](https://www.tamtam.ai/c/shrw-llc) (marriott.com)<br>Branding and hotel management company overseeing 1 Hotels and Homes, Baccarat Hotels and Residences, and Treehouse Hotels after its relaunch in 2025. | Hospitality | 🇺🇸 Stamford | 10,128 | 1980 |
| 20 | [ITT Inc.](https://www.tamtam.ai/c/itt-inc) (itt.com)<br>A global technology company providing cutting-edge solutions in motion technologies, industrial process, and connect and control technologies across various industries worldwide | Industrial Machinery Manufacturing | 🇺🇸 Stamford | 9,330 |  |
| 21 | [Terex Corporation](https://www.tamtam.ai/c/terex-corporation) (terex.com)<br>A global manufacturing company focused on building essential machines, improving lives, volunteering, and maintaining a safe, inclusive work environment | Machinery Manufacturing | 🇺🇸 Norwalk | 8,109 | 1933 |
| 22 | [GE Capital](https://www.tamtam.ai/c/ge-capital) (gecapital.com)<br>Provides financial solutions to support global infrastructure, partnering with industries to build, move, power, and cure the world, bridging industry and finance. | Financial Services | 🇺🇸 Norwalk | 13,000 | 1932 |
| 23 | [Hubbell Incorporated](https://www.tamtam.ai/c/hubbell-incorporated) (hubbell.com)<br>Manufacturer of utility and electrical solutions focused on grid modernization, clean energy, electrification, and energy efficiency worldwide. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Shelton | 7,655 | 1888 |
| 24 | [TRC Companies, Inc.](https://www.tamtam.ai/c/trc-companies-inc) (trccompanies.com)<br>Providing advisory, consulting, construction, engineering, and management services to help clients adapt and achieve sustainable, impactful results. | Environmental Services | 🇺🇸 Windsor | 7,463 | 1969 |
| 25 | [Praxair, Inc - a Linde Company](https://www.tamtam.ai/c/praxair-inc-a-linde-company) (lindeus.com)<br>A global leader in industrial gases and engineering, providing high-quality gases, technologies, and services to diverse markets while promoting sustainability and productivity | Chemical Manufacturing | 🇺🇸 Danbury | 6,549 |  |
| 26 | [PerkinElmer](https://www.tamtam.ai/c/perkinelmer) (perkinelmer.com)<br>A global provider of technology and service solutions for measuring, quantifying, detecting, and reporting in various industries to ensure quality and safety | Biotechnology Research | 🇺🇸 Shelton | 6,485 | 1937 |
| 27 | [Tronox](https://www.tamtam.ai/c/tronox) (tronox.com)<br>A global producer of titanium dioxide and inorganic chemicals, specializing in mining, processing, and manufacturing products for various industries worldwide | Chemical Manufacturing | 🇺🇸 Stamford | 5,877 | 2012 |
| 28 | [Sikorsky](https://www.tamtam.ai/c/sikorsky) (lockheedmartin.com)<br>A global leader in helicopter technology, providing innovative and safe flight solutions for commercial and military markets worldwide since 1939 | Aviation and Aerospace Component Manufacturing | 🇺🇸 Stratford | 5,753 | 1923 |
| 29 | [Amphenol](https://www.tamtam.ai/c/amphenol) (amphenol.com)<br>A Fortune 500 manufacturer with 90,000 employees worldwide, providing key components for electronic devices and networks in daily use | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Wallingford | 5,559 |  |
| 30 | [LAZ Parking](https://www.tamtam.ai/c/laz-parking) (lazparking.com)<br>A parking management service provider with a people-focused philosophy, offering services in various markets across thousands of locations in the US | Real Estate | 🇺🇸 Hartford | 5,078 | 1981 |
| 31 | [Dynata](https://www.tamtam.ai/c/dynata) (dynata.com)<br>Global leader in first-party data for insights, activation, and measurement, serving thousands of clients worldwide with trustworthy, precise data solutions for marketing needs | Market Research | 🇺🇸 Shelton | 4,715 |  |
| 32 | [Crane Company](https://www.tamtam.ai/c/crane-company) (craneco.com)<br>Long-standing ethical business focused on innovation, disciplined management, strategic acquisitions, and creating value for customers, suppliers, and shareholders. | Manufacturing | 🇺🇸 Stamford | 4,696 | 1855 |
| 33 | [IMS Health](https://www.tamtam.ai/c/ims-health) (iqvia.com)<br>Provides healthcare data, analytics, and technology solutions to improve clinical, commercial, and real-world outcomes in the life sciences industry. | Hospitals and Health Care | 🇺🇸 Danbury | 4,675 | 1954 |
| 34 | [Mohegan](https://www.tamtam.ai/c/mohegan) (mohegangaming.com)<br>This company owns, develops, and manages entertainment resorts and provides online gaming solutions, with operations in the US, Canada, and South Korea | Gambling Facilities and Casinos | 🇺🇸 Uncasville | 3,962 | 1996 |
| 35 | [Electronic Data Systems](https://www.tamtam.ai/c/electronic-data-systems) (dxc.com)<br>A global company founded in 1962 offering electronic data processing management personnel and computer hardware, focusing on large corporations and government contracts | IT Services and IT Consulting | 🇺🇸 West Hartford | 3,809 | 1962 |
| 36 | [Point72](https://www.tamtam.ai/c/point72) (point72.com)<br>Global alternative investment firm focusing on fundamental and systematic strategies across asset classes and geographies to deliver superior returns. | Financial Services | 🇺🇸 Stamford | 3,559 | 2014 |
| 37 | [Interactive Brokers](https://www.tamtam.ai/c/interactive-brokers) (interactivebrokers.com)<br>Provides automated trade execution and custody for diverse financial instruments across global markets, offering advanced tools and research at low cost. | Financial Services | 🇺🇸 Greenwich | 3,506 |  |
| 38 | [Sacred Heart University](https://www.tamtam.ai/c/sacred-heart-university) (sacredheart.edu)<br>A Catholic university focused on liberal arts and intellectual traditions, promoting diversity, integrity, leadership, and service for students, faculty, and staff | Higher Education | 🇺🇸 Fairfield | 3,411 | 1963 |
| 39 | [Hexcel Corporation](https://www.tamtam.ai/c/hexcel-corporation) (hexcel.com)<br>Production of carbon fiber reinforcements, resin systems, and honeycomb materials focused on lightweight solutions for commercial aerospace industry. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Stamford | 3,357 | 1948 |
| 40 | [Edgewell Personal Care](https://www.tamtam.ai/c/edgewell-personal-care) (edgewell.com)<br>Global personal care company with 25+ brands, serving 50+ countries, focusing on efficiency, sustainability, and inclusive workplace culture. | Personal Care Product Manufacturing | 🇺🇸 Shelton | 3,354 | 2015 |
| 41 | [Amphenol Communications Solutions](https://www.tamtam.ai/c/amphenol-communications-solutions) (amphenol-cs.com)<br>Design and manufacture innovative connectors and cable assemblies for communications, mobile, RF, optics, data centers, networking, industrial, and automotive applications. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 United States | 3,169 | 1932 |
| 42 | [Legrand, North America](https://www.tamtam.ai/c/legrand-north-america) (legrand.us)<br>Specialist in electrical and digital building infrastructures serving residential and non-residential markets across North and Central America. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 West Hartford | 3,125 | 2002 |
| 43 | [DST Systems](https://www.tamtam.ai/c/dst-systems) (ssctech.com)<br>A global fintech company offering specialized software solutions and services for insurance, asset management, and other financial industries, with a focus on operational excellence | IT Services and IT Consulting | 🇺🇸 Windsor | 3,116 |  |
| 44 | [Centerplate](https://www.tamtam.ai/c/centerplate) (sodexolive.us)<br>Providing food and beverage services, hospitality, and event management solutions for sports venues, entertainment arenas, and convention centers. | Food and Beverage Services | 🇺🇸 Stamford | 2,953 |  |
| 45 | [OP360 (OfficePartners360)](https://www.tamtam.ai/c/op360-officepartners360) (op360.com)<br>Global workforce partner offering streamlined outsourcing solutions for brands, delivering omnichannel customer service, sales, technology support, and back-office services to medium and Fortune 500 companies | Outsourcing and Offshoring Consulting | 🇺🇸 Ridgefield | 2,785 | 2006 |
| 46 | [Ethan Allen Global, Inc.](https://www.tamtam.ai/c/ethan-allen-global-inc) (ethanallen.com)<br>Innovative furniture retailer with a wide range of styles, offering customization options and environmentally sustainable products, emphasizing excellent service and community involvement | Retail | 🇺🇸 Danbury | 2,765 |  |
| 47 | [WorldQuant](https://www.tamtam.ai/c/worldquant) (worldquant.com)<br>Global quantitative asset management firm developing and deploying investment strategies across diverse asset classes in international markets through a large network of offices. | Financial Services | 🇺🇸 Old Greenwich | 2,731 | 2007 |
| 48 | [United Technologies](https://www.tamtam.ai/c/united-technologies) (rtx.com)<br>Merger of aerospace and defense companies combining advanced technology and innovation to provide integrated solutions for global security and aviation. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Farmington | 2,724 |  |
| 49 | [Mohegan Sun](https://www.tamtam.ai/c/mohegan-sun) (mohegansun.com)<br>A destination offering entertainment, gaming, dining, shopping, luxury hotel, spa, golf, shops, restaurants, bars, and entertainment venues in southeastern Connecticut | Gambling Facilities and Casinos | 🇺🇸 Uncasville | 2,661 | 1996 |
| 50 | [University of New Haven](https://www.tamtam.ai/c/university-of-new-haven) (newhaven.edu)<br>Private coeducational university founded in 1920 on the Yale campus Recognized for academic excellence, located in West Haven, with over 9,800 global students | Higher Education | 🇺🇸 West Haven | 2,648 | 1920 |

## 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 Connecticut

- [The largest companies in Connecticut](https://www.tamtam.ai/l/largest-companies-connecticut) (1,247)
- [Financial services firms in Connecticut](https://www.tamtam.ai/l/financial-services-firms-connecticut) (172)
- [Manufacturers in Connecticut](https://www.tamtam.ai/l/manufacturers-connecticut) (143)
- [Companies with in-house R&D in Connecticut](https://www.tamtam.ai/l/r-and-d-companies-connecticut) (101)
- [Education providers in Connecticut](https://www.tamtam.ai/l/education-companies-connecticut) (92)
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- [Hardware manufacturers in Connecticut](https://www.tamtam.ai/l/hardware-companies-connecticut) (86)
- [Critical infrastructure operators in Connecticut](https://www.tamtam.ai/l/critical-infrastructure-operators-connecticut) (85)
- [Healthcare providers in Connecticut](https://www.tamtam.ai/l/healthcare-providers-connecticut) (79)
- [Hospitals and Health Care companies in Connecticut](https://www.tamtam.ai/l/hospitals-and-health-care-companies-connecticut) (76)
- [Retail chains in Connecticut](https://www.tamtam.ai/l/retail-chains-connecticut) (72)
- [Investment Management companies in Connecticut](https://www.tamtam.ai/l/investment-management-companies-connecticut) (72)
- [Venture capital and private equity firms in Connecticut](https://www.tamtam.ai/l/vc-and-private-equity-firms-connecticut) (66)
- [Aerospace and defence companies in Connecticut](https://www.tamtam.ai/l/aerospace-and-defense-companies-connecticut) (58)
- [IT Services and IT Consulting companies in Connecticut](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-connecticut) (57)
- [Professional services firms in Connecticut](https://www.tamtam.ai/l/professional-services-firms-connecticut) (54)
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- [SaaS companies in Connecticut](https://www.tamtam.ai/l/saas-companies-connecticut) (44)
- [Companies with a mobile app in Connecticut](https://www.tamtam.ai/l/companies-with-mobile-app-connecticut) (43)
- [Higher Education companies in Connecticut](https://www.tamtam.ai/l/higher-education-companies-connecticut) (43)
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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)
- [Multinational companies in New York State](https://www.tamtam.ai/l/multinational-companies-new-york-state) (2,216)
- [Multinational companies in Texas](https://www.tamtam.ai/l/multinational-companies-texas) (1,418)
- [Multinational companies in Florida](https://www.tamtam.ai/l/multinational-companies-florida) (897)
- [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)
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- [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-connecticut