This selection of multinational companies in Stamford includes well-established firms in manufacturing, technology, and services. Many of these companies have substantial global operations. Examples include HARMAN International, which designs and manufactures audio products and automotive electronics, and Gartner, a global provider of expert-led research and data-driven insights. United Rentals is a large equipment rental company, while ITT Inc. offers solutions in motion technologies and industrial process.
A notable pattern among these companies is the prevalence of manufacturing and industrial firms alongside significant representation from information services and financial sectors. This suggests a diverse economic base in Stamford, with companies like Hexcel Corporation focusing on aerospace materials and Tronox specializing in titanium dioxide production.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
HARMAN Internationalharman.com
Designs and manufactures premium audio products and automotive electronics, enabling smarter, safer, and immersive in-cabin vehicle experiences worldwide. |
27,936 | |||
| 2 |
Gartnergartner.com
A global company providing expert-led research and data-driven insights to help executives make faster, smarter decisions and achieve stronger performance |
22,206 | |||
| 3 |
United Rentalsunitedrentals.com
Largest equipment rental company providing construction, industrial, and specialty solutions with extensive fleet, safety training, and 24/7 support. |
16,511 | |||
| 4 |
SHRW, LLCmarriott.com
Branding and hotel management company overseeing 1 Hotels and Homes, Baccarat Hotels and Residences, and Treehouse Hotels after its relaunch in 2025. |
10,128 | |||
| 5 | 9,330 | ||||
| 6 |
Tronoxtronox.com
A global producer of titanium dioxide and inorganic chemicals, specializing in mining, processing, and manufacturing products for various industries worldwide |
5,877 | |||
| 7 |
Crane Companycraneco.com
Long-standing ethical business focused on innovation, disciplined management, strategic acquisitions, and creating value for customers, suppliers, and shareholders. |
4,696 | |||
| 8 |
Point72point72.com
Global alternative investment firm focusing on fundamental and systematic strategies across asset classes and geographies to deliver superior returns. |
3,559 | |||
| 9 |
Hexcel Corporationhexcel.com
Production of carbon fiber reinforcements, resin systems, and honeycomb materials focused on lightweight solutions for commercial aerospace industry. |
3,357 | |||
| 10 |
Centerplatesodexolive.us
Providing food and beverage services, hospitality, and event management solutions for sports venues, entertainment arenas, and convention centers. |
2,953 | |||
| 11 | 2,292 | ||||
| 12 |
Daymondaymon.com
Provides end-to-end private brand development services including strategy, product development, quality assurance, supplier management, sales, and branding solutions. |
2,262 | |||
| 13 |
ISG (Information Services Group)isg-one.com
Global AI-focused technology research and advisory firm helping organizations optimize technology investments and achieve operational excellence and growth. |
2,189 | |||
| 14 |
Conair LLCconair.com
Design and manufacture of personal care, kitchen appliances, cookware, hair accessories, cosmetic and travel products sold globally. |
2,093 | |||
| 15 |
Cristaltronox.com
A leading producer of titanium dioxide and zircon products, with a global footprint in mining, processing, and sale of mineral sands |
2,050 | |||
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 | 1,861 | ||||
| 17 |
Au Pair in Americaaupairinamerica.com
Provider of cultural exchange experiences through live-in child care assistance, placing over 110,000 au pairs in 43 states since 1986 |
1,633 | |||
| 18 |
Octagonoctagon.com
A global agency specializing in sports, entertainment, and culture, providing creative marketing, sponsorship consulting, athlete representation, and event management services worldwide |
1,454 | |||
| 19 |
BlueTriton Brandsbluetriton.com
A leading provider of responsibly sourced spring and purified water products, promoting sustainability through natural resource management and community engagement |
1,249 | |||
| 20 | 1,104 | ||||
| 21 | 1,051 | ||||
| 22 |
Rizingrizing.com
A global SAP partner offering strategy, implementation, and support for SAP HCM, EAM, and Retail/Fashion industries, driving business transformation with industry expertise |
989 | |||
| 23 |
ENGinenginprogram.org
A non-profit organization connecting Ukrainians with English-speaking peers for free online conversation practice to improve spoken English and intercultural skills |
760 | |||
| 24 |
Crisil Coalition Greenwichgreenwich.com
A leading provider of strategic benchmarking and analytics to the financial services industry, offering actionable insights to improve business performance |
660 | |||
| 25 |
Castleton Commodities Internationalcci.com
Energy trading and infrastructure asset investing supported by advanced analytics, fundamental research, and a focus on sustainable, reliable energy. |
623 | |||
| 26 |
Americaresamericares.org
A global nonprofit organization dedicated to saving lives and improving health for over 40 years Visit wwwamericaresorg for more information |
614 | |||
| 27 |
ReneSola Ltd.emeren.com
Global solar project developer and operator with operations in over 10 countries, formerly known as ReneSola Power Ltd, now rebranded as Emeren Group Ltd |
580 | |||
| 28 |
Affinion Grouptenerity.com
Affinion helps companies build customer loyalty through targeted marketing and subscription-based lifestyle services, generating revenue for marketing partners worldwide |
574 | |||
| 29 |
OdysseyReodysseyre.com
Provides diverse property, casualty, and specialty reinsurance solutions globally through multiple offices, part of a major financial holdings group. |
571 | |||
| 30 |
Rizing Consumer Industriesrizing.com
Leader in retail and consumer products for SAP software, providing specialized solutions and consulting services to optimize SAP experience worldwide |
505 | |||
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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 14, 2026.
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