# Multinational companies headquartered in Massachusetts

Tamtam tracks 637 multinational companies headquartered in Massachusetts. This list ranks the 100 largest by number of employees on LinkedIn, led by Thermo Fisher Scientific, GE and Fidelity Investments. Their median headcount is 5,812. Half of them were founded in 1983 or later. The most common headquarters are Boston (38), Waltham (9) and Cambridge (8).

This selection of large multinational companies in Massachusetts shows a mix of sectors, including financial services, biotechnology, and consulting. Fidelity Investments provides diversified financial services, while Thermo Fisher Scientific specializes in biotechnology research. GE focuses on aviation and energy, and The TJX Companies, Inc. is a global off-price retailer. Boston Scientific develops medical technologies, and State Street offers comprehensive investment services. Many of these companies, such as Fidelity Investments (founded 1946) and State Street (founded 1792), have long histories.

The data reveals a strong concentration of headquarters in Boston, with several other significant companies located in nearby cities like Waltham, Framingham, and Marlborough. This indicates a geographic clustering of corporate activity within the state. The presence of both established corporations and institutions like Harvard University (founded 1636) highlights a diverse economic landscape.

🇺🇸 Massachusetts · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Thermo Fisher Scientific](https://www.tamtam.ai/c/thermo-fisher-scientific) (thermofisher.com)<br>A global leader in science services, providing innovative technologies and pharmaceutical support to make the world healthier, cleaner, and safer | Biotechnology Research | 🇺🇸 Waltham | 100,256 |  |
| 2 | [GE](https://www.tamtam.ai/c/ge) (ge.com)<br>Focus on advancing aviation and energy industries through innovative technologies and solutions shared via specialized aerospace and energy platforms. | Industrial Machinery Manufacturing | 🇺🇸 Boston | 99,488 |  |
| 3 | [Fidelity Investments](https://www.tamtam.ai/c/fidelity-investments) (fidelity.com)<br>Financial well-being through diversified market-leading services for individuals, families, employers, wealth management firms, and institutions using trillions in administered and discretionary assets. | Financial Services | 🇺🇸 Boston | 84,668 | 1946 |
| 4 | [GE Vernova](https://www.tamtam.ai/c/ge-vernova) (linktr.ee)<br>A purpose-built company focused on electrifying the planet and decarbonizing it through a diverse portfolio of energy businesses, ensuring reliable and sustainable energy | Energy Technology | 🇺🇸 Boston | 70,646 |  |
| 5 | [The TJX Companies, Inc.](https://www.tamtam.ai/c/the-tjx-companies-inc) (jobs.tjx.com)<br>Leading global off-price retailer offering apparel and home fashions through seven brands across nine countries, nearly 4,700 stores, and five e-commerce sites. | Retail | 🇺🇸 Framingham | 57,100 |  |
| 6 | [Boston Scientific](https://www.tamtam.ai/c/boston-scientific) (bostonscientific.com)<br>Develops and provides innovative medical technologies including devices and therapies for various diseases, improving patient health and reducing healthcare costs worldwide. | Medical Equipment Manufacturing | 🇺🇸 Marlborough | 54,633 |  |
| 7 | [State Street](https://www.tamtam.ai/c/state-street) (statestreet.com)<br>Global financial leader providing comprehensive investment services, institutional asset management, multi-asset trading, and digital solutions to enhance portfolio performance and decision making. | Financial Services | 🇺🇸 Boston | 46,913 | 1792 |
| 8 | [Boston Consulting Group (BCG)](https://www.tamtam.ai/c/boston-consulting-group-bcg) (bcg.com)<br>A global management consulting firm that partners with organizations to tackle challenges, drive growth, and create positive societal impact through innovative solutions | Business Consulting and Services | 🇺🇸 Boston | 40,412 | 1963 |
| 9 | [Liberty Mutual Insurance](https://www.tamtam.ai/c/liberty-mutual-insurance) (libertymutualgroup.com)<br>Global leader in property and casualty insurance dedicated to fostering career growth, social responsibility, sustainability, diversity, and innovative solutions for customers worldwide | Insurance | 🇺🇸 Boston | 37,734 | 1912 |
| 10 | [Harvard University](https://www.tamtam.ai/c/harvard-university) (harvard.edu)<br>An institution dedicated to teaching, learning, and research, producing global leaders across disciplines since 1636 Maintains flagship social media channels | Higher Education | 🇺🇸 Cambridge | 34,940 |  |
| 11 | [Analog Devices](https://www.tamtam.ai/c/analog-devices) (analog.com)<br>Global semiconductor company combining analog, digital, and software technologies to advance digitized factories, mobility, healthcare, and climate solutions. | Semiconductor Manufacturing | 🇺🇸 Wilmington | 27,234 |  |
| 12 | [Iron Mountain](https://www.tamtam.ai/c/iron-mountain) (ironmountain.com)<br>Global leader in storage and information management services, partnering with organizations worldwide to protect and unlock the value of their assets and data | IT Services and IT Consulting | 🇺🇸 Boston | 24,357 |  |
| 13 | [Publicis Sapient](https://www.tamtam.ai/c/publicis-sapient) (publicissapient.com)<br>A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations | Business Consulting and Services | 🇺🇸 Boston | 24,251 |  |
| 14 | [Bain & Company](https://www.tamtam.ai/c/bain-and-company) (bain.com)<br>Global consultancy aiding ambitious change makers define the future, achieving extraordinary results, outperforming competition, redefining industries, and tackling urgent societal challenges. | Business Consulting and Services | 🇺🇸 Boston | 23,729 |  |
| 15 | [Charles River Laboratories](https://www.tamtam.ai/c/charles-river-laboratories) (criver.com)<br>Guided by strong purpose, creating healthier lives, focusing on therapeutics for patients, animal care, planet well-being, and its passionate, skilled people. | Biotechnology Research | 🇺🇸 Wilmington | 22,000 | 1947 |
| 16 | [PPD](https://www.tamtam.ai/c/ppd) (ppd.com)<br>Global clinical development services including laboratory testing, patient recruitment, and data analytics to accelerate drug innovation for pharma, biotech, and government organizations. | Research Services | 🇺🇸 Waltham | 20,440 |  |
| 17 | [Preply](https://www.tamtam.ai/c/preply) (preply.com)<br>The company connects learners with online tutors worldwide, offering live language classes with AI tools and learning materials for progress and engagement | Technology, Information and Internet | 🇺🇸 Brookline | 18,061 | 2012 |
| 18 | [Virtusa](https://www.tamtam.ai/c/virtusa-southborough) (virtusa.com)<br>Digital engineering and technology services provider for Forbes Global 2000 companies worldwide, focusing on innovative solutions and impactful results through an "Engineering First" approach | IT Services and IT Consulting | 🇺🇸 Southborough | 18,045 | 1996 |
| 19 | [Amazon Fulfillment Technologies & Robotics](https://www.tamtam.ai/c/amazon-fulfillment-technologies-and-robotics) (amazon.jobs)<br>The company partners people with intelligent robots to enhance order fulfillment accuracy, create new jobs worldwide, and improve customer experience | Software Development | 🇺🇸 North Reading | 17,911 | 2003 |
| 20 | [Northeastern University](https://www.tamtam.ai/c/northeastern-university) (northeastern.edu)<br>Global research university combining experiential learning with cooperative education, offering diverse programs and addressing health, security, and sustainability challenges worldwide. | Higher Education | 🇺🇸 Boston | 17,385 |  |
| 21 | [Bright Horizons](https://www.tamtam.ai/c/bright-horizons) (brighthorizons.com)<br>Provides on-site childcare, backup care, and education programs to support employees, enhance workplace culture, and develop critical skills. | Education Administration Programs | 🇺🇸 Newton | 14,333 | 1986 |
| 22 | [Keurig Dr Pepper Inc.](https://www.tamtam.ai/c/keurig-dr-pepper-inc) (keurigdrpepper.com)<br>Leading North American beverage company with extensive portfolio including coffee, soft drinks, water, juice, and mixers, strong distribution network. | Food and Beverage Services | 🇺🇸 Burlington | 13,948 |  |
| 23 | [Clean Harbors](https://www.tamtam.ai/c/clean-harbors) (cleanharbors.com)<br>Provider of hazardous waste management, emergency spill response, industrial cleaning, recycling, and used oil re-refining services across North America. | Environmental Services | 🇺🇸 Norwell | 13,449 | 1980 |
| 24 | [Wayfair](https://www.tamtam.ai/c/wayfair) (aboutwayfair.com)<br>Destination for all things home, offering expert customer service, tools for easy shopping, and wide selection to help create personalized spaces | Retail | 🇺🇸 Boston | 12,524 | 2002 |
| 25 | [HubSpot](https://www.tamtam.ai/c/hubspot) (hubspot.com)<br>It provides a comprehensive CRM platform with marketing, sales, and service tools, fostering employee growth and a flexible workplace culture. | Software Development | 🇺🇸 Cambridge | 12,229 | 2006 |
| 26 | [Waters Corporation](https://www.tamtam.ai/c/waters-corporation) (waters.com)<br>A global leader in analytical instruments and software, pioneering innovations in chromatography, mass spectrometry, and thermal analysis for various sciences | Biotechnology Research | 🇺🇸 Milford | 11,842 |  |
| 27 | [New Balance](https://www.tamtam.ai/c/new-balance) (newbalance.com)<br>Designing and manufacturing high-quality athletic footwear and apparel with a focus on comfort, fit, innovation, and community support worldwide. | Sporting Goods Manufacturing | 🇺🇸 Brighton | 11,624 | 1906 |
| 28 | [Akamai Technologies](https://www.tamtam.ai/c/akamai-technologies) (akamai.com)<br>A global leader in internet infrastructure, Akamai powers and protects online experiences for billions of users daily through innovative solutions | Technology, Information and Internet | 🇺🇸 Cambridge | 10,647 |  |
| 29 | [Harvard Business Review](https://www.tamtam.ai/c/harvard-business-review) (hbr.org)<br>Provides professionals rigorous insights, best practices to lead effectively, make positive impact, bridging academia and global enterprises. | Book and Periodical Publishing | 🇺🇸 Brighton | 9,905 |  |
| 30 | [EG America](https://www.tamtam.ai/c/eg-america) (eg-america.com)<br>A rapidly growing convenience store retailer in the US, part of a global company, offering top-notch products and services nationwide | Retail | 🇺🇸 Westborough | 9,343 | 2019 |
| 31 | [Netcracker Technology](https://www.tamtam.ai/c/netcracker-technology) (netcracker.com)<br>It is a software company providing critical solutions for service providers, focusing on digital transformation and cloud opportunities worldwide. | Telecommunications | 🇺🇸 Waltham | 8,935 | 1993 |
| 32 | [CDM Smith](https://www.tamtam.ai/c/cdm-smith) (cdmsmith.com)<br>This company provides comprehensive solutions in water, environment, transportation, energy, and facilities to worldwide public and private clients | Civil Engineering | 🇺🇸 Boston | 8,617 | 1947 |
| 33 | [PTC](https://www.tamtam.ai/c/ptc) (ptc.com)<br>It provides solutions for manufacturers to enhance product differentiation, operational excellence, and workforce productivity through digital transformation and technology. | Software Development | 🇺🇸 Boston | 8,184 |  |
| 34 | [Toast](https://www.tamtam.ai/c/toast-boston) (pos.toasttab.com)<br>Toast empowers restaurants with cloud-based software and hardware to streamline operations, drive revenue, and enhance guest experience through POS, marketing, and HR solutions | Software Development | 🇺🇸 Boston | 7,762 | 2011 |
| 35 | [Biogen](https://www.tamtam.ai/c/biogen) (biogen.com)<br>Company pioneers innovative science, delivering new medicines to transform patients' lives, with a global presence and focus on superior treatment outcomes. | Biotechnology Research | 🇺🇸 Cambridge | 7,724 |  |
| 36 | [Sensata Technologies](https://www.tamtam.ai/c/sensata-technologies) (sensata.com)<br>Supplier of sensing, electrical protection, control, and power management solutions enhancing safety, efficiency, and comfort across multiple industries worldwide. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Attleboro | 7,634 |  |
| 37 | [Temu](https://www.tamtam.ai/c/temu) (temu.com)<br>Online marketplace connecting consumers with millions of merchandise partners, manufacturers, and brands offering affordable products worldwide. | Technology, Information and Internet | 🇺🇸 Boston | 7,373 |  |
| 38 | [Hologic, Inc.](https://www.tamtam.ai/c/hologic-inc) (hologic.com)<br>Develops innovative medical products, especially for women's health, focusing on early detection and better outcomes across breast, skeletal, diagnostic, and GYN surgical solutions. | Medical Equipment Manufacturing | 🇺🇸 Marlborough | 6,921 | 1985 |
| 39 | [Moderna](https://www.tamtam.ai/c/moderna) (modernatx.com)<br>Pioneering mRNA technology for new medicines to improve patient lives by providing real-time instructions for protein production in cells | Biotechnology Research | 🇺🇸 Cambridge | 6,906 | 2010 |
| 40 | [Bose Corporation](https://www.tamtam.ai/c/bose-corporation) (bose.com)<br>Develops advanced audio technologies and products for home, automotive, portable, and public spaces, enhancing music listening experiences worldwide. | Computers and Electronics Manufacturing | 🇺🇸 Framingham | 6,699 |  |
| 41 | [Entegris](https://www.tamtam.ai/c/entegris) (entegris.com)<br>A global leader in advanced science-based solutions for technology challenges, driving innovation with artificial intelligence, augmented reality, and IoT technologies | Semiconductor Manufacturing | 🇺🇸 Billerica | 6,612 |  |
| 42 | [Vertex Pharmaceuticals](https://www.tamtam.ai/c/vertex-pharmaceuticals) (vrtx.com)<br>Global biotechnology company focusing on creating medicines for serious and life-threatening diseases, with a pioneering history in treating cystic fibrosis | Biotechnology Research | 🇺🇸 Boston | 6,382 | 1989 |
| 43 | [Vista](https://www.tamtam.ai/c/vista-waltham) (vistaprint.com)<br>Global design and marketing partner for small businesses worldwide, providing full-service solutions for physical and digital presence to achieve success | Software Development | 🇺🇸 Waltham | 6,238 | 1995 |
| 44 | [Teradyne](https://www.tamtam.ai/c/teradyne) (teradyne.com)<br>This company provides advanced test solutions for semiconductors, electronic systems, wireless devices, and robotics to improve productivity and lower costs for manufacturers worldwide | Semiconductor Manufacturing | 🇺🇸 North Reading | 6,210 | 1960 |
| 45 | [Rich Products Corporation](https://www.tamtam.ai/c/rich-products-corporation) (richs.com)<br>A family-owned food company providing a wide range of products for home, restaurant, and bakery use, focused on inspiring possibilities and helping food industry professionals succeed | Food and Beverage Manufacturing | 🇺🇸 Burlington | 6,208 | 1945 |
| 46 | [American Tower](https://www.tamtam.ai/c/american-tower) (americantower.com)<br>Global provider of digital infrastructure supporting mobile and broadband networks, enabling connectivity, innovation, and bridging digital divides worldwide. | Telecommunications | 🇺🇸 Boston | 6,111 | 1995 |
| 47 | [Cultural Care Au Pair](https://www.tamtam.ai/c/cultural-care-au-pair) (culturalcare.com)<br>Connecting international au pairs with American families for childcare, cultural exchange, and enriching year-long experiences in the USA. | Individual and Family Services | 🇺🇸 Cambridge | 6,091 | 1989 |
| 48 | [Dynatrace](https://www.tamtam.ai/c/dynatrace) (dynatrace.com)<br>This company specializes in providing a platform that unifies observability, business, and security data with AI-driven analytics and automation to optimize cloud operations and ensure flawless digital experiences | Software Development | 🇺🇸 Boston | 6,090 |  |
| 49 | [IDC](https://www.tamtam.ai/c/idc) (idc.com)<br>Provider of market intelligence, advisory services, and events for IT, telecommunications, and consumer technology markets worldwide, helping businesses make informed decisions | Technology, Information and Internet | 🇺🇸 Boston | 5,917 | 1964 |
| 50 | [Veolia \| North America](https://www.tamtam.ai/c/veolia-north-america) (veolianorthamerica.com)<br>Provides resource management solutions including water decontamination, toxic waste handling, fossil fuel alternatives, wastewater reuse, and battery recycling for cities and industries. | Environmental Services | 🇺🇸 Boston | 5,812 |  |
| 51 | [Tripadvisor](https://www.tamtam.ai/c/tripadvisor) (tripadvisor.com)<br>A leading travel guidance platform with 1 billion reviews, offering deals on accommodations, experiences, and restaurants to help travelers plan their trips | Software Development | 🇺🇸 Needham | 5,762 |  |
| 52 | [DraftKings Inc.](https://www.tamtam.ai/c/draftkings-inc) (careers.draftkings.com)<br>The company is committed to creating popular games and betting experiences, leading the way in sports entertainment, innovation, and global collaboration | Mobile Gaming Apps | 🇺🇸 Boston | 5,760 | 2012 |
| 53 | [Lionbridge](https://www.tamtam.ai/c/lionbridge) (lionbridge.com)<br>This company specializes in translation and localization services in over 350 languages, connecting global brands with customers worldwide through cultural experiences | Translation and Localization | 🇺🇸 Waltham | 5,583 | 1996 |
| 54 | [Pegasystems](https://www.tamtam.ai/c/pegasystems) (pega.com)<br>It provides a low-code platform for organizations to enhance agility, automate workflows, and address business challenges using AI technology. | Software Development | 🇺🇸 Waltham | 5,569 |  |
| 55 | [eClinicalWorks](https://www.tamtam.ai/c/eclinicalworks) (eclinicalworks.com)<br>It provides Electronic Health Record and Practice Management solutions to medical professionals, enhancing care quality and reducing costs through technology. | Software Development | 🇺🇸 Westborough | 5,426 | 1999 |
| 56 | [Insulet Corporation](https://www.tamtam.ai/c/insulet-corporation) (insulet.com)<br>Simplifying diabetes management for individuals with the Omnipod platform, offering tubeless, wearable insulin delivery and automated blood sugar control without injections or fingersticks globally. | Medical Equipment Manufacturing | 🇺🇸 Acton | 5,407 | 2000 |
| 57 | [Alexion Pharmaceuticals, Inc.](https://www.tamtam.ai/c/alexion-pharmaceuticals-inc) (alexion.com)<br>Development of innovative medicines targeting rare diseases, focusing on complement system biology, expanding global reach to serve patients worldwide. | Biotechnology Research | 🇺🇸 Boston | 5,112 | 1992 |
| 58 | [Xceedance](https://www.tamtam.ai/c/xceedance) (xceedance.com)<br>Provider of strategic operations support, technology, and data services for insurance organizations globally, enhancing efficiencies and optimizing business processes with expertise in underwriting, analytics, and more | Insurance | 🇺🇸 Boston | 4,963 | 2013 |
| 59 | [Bruker](https://www.tamtam.ai/c/bruker) (bruker.com)<br>Development and provision of advanced analytical instrumentation and solutions for research, industrial production, quality assurance, and process reliability worldwide. | Biotechnology Research | 🇺🇸 Billerica | 4,824 | 1960 |
| 60 | [MKS Inc.](https://www.tamtam.ai/c/mks-inc) (mks.com)<br>provides technology solutions including instruments, systems, and specialty chemicals for semiconductor manufacturing, electronics, packaging, and specialty industrial applications | Semiconductor Manufacturing | 🇺🇸 Andover | 4,581 | 1961 |
| 61 | [Converse](https://www.tamtam.ai/c/converse) (careers.converse.com)<br>This company creates iconic street style sneakers like Chuck Taylor All Stars and One Stars that redefine sport, street, and creative culture | Retail | 🇺🇸 Boston | 4,522 | 1908 |
| 62 | [C&W Services](https://www.tamtam.ai/c/c-and-w-services) (cwservices.com)<br>A leading provider of integrated facility services, focusing on driving down operating expenses, increasing efficiency, and creating a positive occupant experience through innovation and empowerment | Facilities Services | 🇺🇸 Needham | 4,447 | 1950 |
| 63 | [Rocket Software](https://www.tamtam.ai/c/rocket-software) (rocketsoftware.com)<br>Partner for organizations transforming IT infrastructure, applications, and data from core systems to cloud with global support and innovation. | IT Services and IT Consulting | 🇺🇸 Waltham | 4,385 |  |
| 64 | [Talbots](https://www.tamtam.ai/c/talbots) (jobs.knitwellgroup.com)<br>A timeless fashion brand founded on quality, service, and innovation, known for classic pieces and a commitment to customer satisfaction | Retail | 🇺🇸 Hingham | 4,311 |  |
| 65 | [edc.org](https://www.tamtam.ai/c/edc-org) (edc.org)<br>A global nonprofit focused on improving education, promoting health, and expanding economic opportunity through innovative programs in over 80 countries | Non-profit Organizations | 🇺🇸 Waltham | 4,310 | 1958 |
| 66 | [L.E.K. Consulting](https://www.tamtam.ai/c/l-e-k-consulting) (lek.com)<br>Global management consulting firm providing deep industry expertise and rigorous analysis to help business leaders improve performance and create greater shareholder returns. | Business Consulting and Services | 🇺🇸 Boston | 4,271 | 1983 |
| 67 | [Harte Hanks](https://www.tamtam.ai/c/harte-hanks) (hartehanks.com)<br>A global customer experience company specializing in personalized marketing, customer care services, and fulfillment solutions to create enduring connections | Advertising Services | 🇺🇸 Chelmsford | 4,267 | 1923 |
| 68 | [Progress Software](https://www.tamtam.ai/c/progress-software) (progress.com)<br>Helping businesses drive innovation and success with high-impact application products, deployment flexibility, and secure management solutions, trusted by enterprises and developers worldwide | Software Development | 🇺🇸 Burlington | 4,212 | 1981 |
| 69 | [SharkNinja](https://www.tamtam.ai/c/sharkninja) (sharkninja.com)<br>A global product design and technology company known for innovative 5-star rated lifestyle solutions in household product categories like Cleaning, Cooking, and Food Preparation | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Needham | 4,199 | 1994 |
| 70 | [Aquent](https://www.tamtam.ai/c/aquent) (aquent.com)<br>Global work solutions company providing talent, technology, and services for businesses through recruiting, creative strategy, project management, and more | Staffing and Recruiting | 🇺🇸 Boston | 4,071 |  |
| 71 | [Aspen Technology](https://www.tamtam.ai/c/aspen-technology) (aspentech.com)<br>Global software leader enabling industries to meet demand sustainably by optimizing asset design, operation, and maintenance lifecycle for improved operational excellence | Software Development | 🇺🇸 Bedford | 4,065 |  |
| 72 | [Reebok](https://www.tamtam.ai/c/reebok) (reebok.com)<br>It designs and creates fitness gear and experiences, aiming to inspire individuals to achieve their best physically, mentally, and socially. | Manufacturing | 🇺🇸 Boston | 4,008 | 1895 |
| 73 | [Goodwin](https://www.tamtam.ai/c/goodwin) (goodwinlaw.com)<br>Global law firm providing litigation, regulatory compliance, advisory services, and complex transactions for clients in diverse industries worldwide. | Law Practice | 🇺🇸 Boston | 3,975 | 1912 |
| 74 | [School of Rock](https://www.tamtam.ai/c/school-of-rock) (schoolofrock.com)<br>Global leader in music education for kids and adults, offering professional musician-led lessons, group rehearsals, and live performances in over 300 locations worldwide | Musicians | 🇺🇸 Canton | 3,971 | 1998 |
| 75 | [Cabot Corporation](https://www.tamtam.ai/c/cabot-corporation) (cabotcorp.com)<br>Global specialty chemical and performance materials company providing solutions to address current challenges and future customer needs worldwide. | Chemical Manufacturing | 🇺🇸 Boston | 3,719 | 1882 |
| 76 | [MEDITECH](https://www.tamtam.ai/c/meditech) (ehr.meditech.com)<br>Healthcare organization empowering digital transformation with an intuitive and interoperable EHR system, cloud-based solutions, and personalized mobile tools to enhance efficiency and outcomes | IT Services and IT Consulting | 🇺🇸 Canton | 3,702 | 1969 |
| 77 | [Berklee College of Music](https://www.tamtam.ai/c/berklee-college-of-music) (berklee.edu)<br>A leading college offering top-tier music education for students around the world | Musicians | 🇺🇸 Boston | 3,696 | 1946 |
| 78 | [Travelport](https://www.tamtam.ai/c/travelport) (travelport.com)<br>Connecting travel buyers and sellers globally, powering AI-driven travel commerce and delivering exceptional travel experiences across 160+ countries. | IT Services and IT Consulting | 🇺🇸 Langley | 3,643 | 1971 |
| 79 | [Wellington Management](https://www.tamtam.ai/c/wellington-management) (wellington.com)<br>Independent investment management firm serving diverse clients worldwide with comprehensive capabilities across global equity, fixed income, alternatives, and private markets. | Investment Management | 🇺🇸 Boston | 3,609 | 1933 |
| 80 | [Revvity](https://www.tamtam.ai/c/revvity) (revvity.com)<br>Revvity specializes in innovative health science solutions, technologies, and services for healthcare advancements worldwide, covering discovery, development, and diagnosis to cure | Biotechnology Research | 🇺🇸 Waltham | 3,569 | 2023 |
| 81 | [Sapient](https://www.tamtam.ai/c/sapient) (linkedin.com)<br>Global digital business transformation partner formed from a merger of legendary brands in 2019, previously known by a different name Join our LinkedIn community! | IT Services and IT Consulting | 🇺🇸 Boston | 3,549 | 1990 |
| 82 | [Sonesta International Hotels](https://www.tamtam.ai/c/sonesta-international-hotels) (sonesta.com)<br>Leading global hotel company with 17 brands, 1200 hotels, 100K+ rooms across three continents, and award-winning loyalty program, offering unique and authentic guest experiences | Hospitality | 🇺🇸 Newton | 3,524 | 1937 |
| 83 | [BeOne Medicines](https://www.tamtam.ai/c/beone-medicines) (beonemedicines.com)<br>Developing innovative, affordable cancer treatments for hematology and solid tumors with a global team and collaborative approach. | Pharmaceutical Manufacturing | 🇺🇸 Cambridge | 3,350 | 2010 |
| 84 | [Pyramid Global Hospitality](https://www.tamtam.ai/c/pyramid-global-hospitality) (pyramidglobal.com)<br>Pyramid Global Hospitality is a leading hotel management company with a strong focus on employee development and a people-centric culture | Hospitality | 🇺🇸 Boston | 3,344 |  |
| 85 | [JSI](https://www.tamtam.ai/c/jsi-boston) (jsi.org)<br>Support underserved communities worldwide through health management consulting, research, training, and capacity building for effective public health solutions. | Non-profit Organizations | 🇺🇸 Boston | 3,272 | 1978 |
| 86 | [Rapid7](https://www.tamtam.ai/c/rapid7) (rapid7.com)<br>Global leader in AI-powered managed cybersecurity operations, advancing organizations' cyber resilience through integrating security data, AI, and threat intelligence to reduce risk and disrupt attackers. | Computer and Network Security | 🇺🇸 Boston | 3,268 |  |
| 87 | [Saint-Gobain Abrasives](https://www.tamtam.ai/c/saint-gobain-abrasives) (saint-gobain-surfacesolutions.com)<br>The company offers powerful and precise abrasives solutions for various markets, focusing on customization, performance, and safety with global presence | Industrial Machinery Manufacturing | 🇺🇸 Worcester | 3,196 | 1885 |
| 88 | [Precisely](https://www.tamtam.ai/c/precisely) (precisely.com)<br>Provides data integrity solutions that enhance data quality, integrate datasets, and support analytics for organizations worldwide, ensuring reliable business insights. | Software Development | 🇺🇸 Burlington | 3,014 |  |
| 89 | [CCL Label](https://www.tamtam.ai/c/ccl-label) (ccllabel.com)<br>Global leader in innovative label solutions for various industries, offering pressure sensitive and extruded film materials, metal components, and complementary products worldwide | Packaging and Containers Manufacturing | 🇺🇸 Framingham | 2,988 | 1951 |
| 90 | [MFS Investment Management](https://www.tamtam.ai/c/mfs-investment-management) (mfs.com)<br>Global investment manager offering active management, disciplined investing, risk management, serving financial advisors, intermediaries, and institutional clients worldwide. | Investment Management | 🇺🇸 Boston | 2,971 | 1924 |
| 91 | [Watts Water Technologies](https://www.tamtam.ai/c/watts-water-technologies) (watts.com)<br>Provides diverse water solutions for residential, industrial, and municipal applications, including plumbing, water quality, HVAC, and drainage systems. | Wholesale Building Materials | 🇺🇸 North Andover | 2,947 | 1874 |
| 92 | [Viant Medical](https://www.tamtam.ai/c/viant-medical) (viantmedical.com)<br>Global provider of design and manufacturing services for medical devices across various specialties, offering end-to-end capabilities from development to packaging. | Medical Equipment Manufacturing | 🇺🇸 Foxborough | 2,921 |  |
| 93 | [City Year](https://www.tamtam.ai/c/city-year) (linktr.ee)<br>Organization supporting students and schools with diverse teams of AmeriCorps members, improving academic outcomes and fostering civic engagement in communities nationwide and internationally | Non-profit Organizations | 🇺🇸 Boston | 2,920 | 1988 |
| 94 | [Klaviyo](https://www.tamtam.ai/c/klaviyo) (klaviyo.com)<br>Unified customer platform empowering brands with ownership of consumer data to automate personalized email/SMS communications, foster customer relationships, and drive growth | Marketing Services | 🇺🇸 Boston | 2,902 | 2012 |
| 95 | [Alnylam Pharmaceuticals](https://www.tamtam.ai/c/alnylam-pharmaceuticals) (alnylam.com)<br>A global biotech company pioneering RNAi therapeutics to treat rare genetic diseases, with a breakthrough product and a robust pipeline | Biotechnology Research | 🇺🇸 Cambridge | 2,883 | 2002 |
| 96 | [Oxford Global Resources](https://www.tamtam.ai/c/oxford-global-resources) (oxfordcorp.com)<br>Delivering tailored solutions for technical challenges with staffing, consulting, and project management services globally, specializing in workforce mobilization and digital transformation | Professional Services | 🇺🇸 Beverly | 2,879 |  |
| 97 | [Regal Beloit Corporation](https://www.tamtam.ai/c/regal-beloit-corporation) (maintenance.regalrexnord.com)<br>This company manufactures global airflow, motion control, power transmission, and power generation solutions used in commercial, industrial, and residential settings worldwide. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Beloit | 2,808 | 1955 |
| 98 | [Public Consulting Group](https://www.tamtam.ai/c/public-consulting-group) (publicconsultinggroup.com)<br>Consulting firm specializing in public sector solutions, improving health, education, and human services agencies to enhance community outcomes. | Professional Services | 🇺🇸 Boston | 2,714 | 1986 |
| 99 | [CyberArk](https://www.tamtam.ai/c/cyberark) (cyberark.com)<br>Global leader in identity security. Offers comprehensive security for human and machine identities across applications, workforces, cloud, and DevOps lifecycle. | IT System Custom Software Development | 🇺🇸 Newton | 2,712 | 1999 |
| 100 | [NETSCOUT](https://www.tamtam.ai/c/netscout) (netscout.com)<br>This company provides a Visibility Without Borders platform to help essential organizations manage complex networks, unlock insights, anticipate problems, and stay unstoppable | Software Development | 🇺🇸 Westford | 2,708 | 1984 |

## 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 Massachusetts

- [The largest companies in Massachusetts](https://www.tamtam.ai/l/largest-companies-massachusetts) (3,419)
- [Companies with in-house R&D in Massachusetts](https://www.tamtam.ai/l/r-and-d-companies-massachusetts) (396)
- [SaaS companies in Massachusetts](https://www.tamtam.ai/l/saas-companies-massachusetts) (339)
- [Education providers in Massachusetts](https://www.tamtam.ai/l/education-companies-massachusetts) (313)
- [Software Development companies in Massachusetts](https://www.tamtam.ai/l/software-development-companies-massachusetts) (273)
- [Manufacturers in Massachusetts](https://www.tamtam.ai/l/manufacturers-massachusetts) (269)
- [Professional services firms in Massachusetts](https://www.tamtam.ai/l/professional-services-firms-massachusetts) (249)
- [AI companies in Massachusetts](https://www.tamtam.ai/l/ai-companies-massachusetts) (243)
- [Financial services firms in Massachusetts](https://www.tamtam.ai/l/financial-services-firms-massachusetts) (235)
- [Healthcare providers in Massachusetts](https://www.tamtam.ai/l/healthcare-providers-massachusetts) (213)
- [Hospitals and Health Care companies in Massachusetts](https://www.tamtam.ai/l/hospitals-and-health-care-companies-massachusetts) (197)
- [Hardware manufacturers in Massachusetts](https://www.tamtam.ai/l/hardware-companies-massachusetts) (196)
- [Subscription businesses in Massachusetts](https://www.tamtam.ai/l/subscription-businesses-massachusetts) (183)
- [IT Services and IT Consulting companies in Massachusetts](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-massachusetts) (176)
- [Retail chains in Massachusetts](https://www.tamtam.ai/l/retail-chains-massachusetts) (168)
- [Critical infrastructure operators in Massachusetts](https://www.tamtam.ai/l/critical-infrastructure-operators-massachusetts) (165)
- [Companies with a mobile app in Massachusetts](https://www.tamtam.ai/l/companies-with-mobile-app-massachusetts) (159)
- [Higher Education companies in Massachusetts](https://www.tamtam.ai/l/higher-education-companies-massachusetts) (158)
- [Venture capital and private equity firms in Massachusetts](https://www.tamtam.ai/l/vc-and-private-equity-firms-massachusetts) (157)
- [IT services companies in Massachusetts](https://www.tamtam.ai/l/it-services-companies-massachusetts) (155)
- [Consulting firms in Massachusetts](https://www.tamtam.ai/l/consulting-firms-massachusetts) (153)
- [Financial Services companies in Massachusetts](https://www.tamtam.ai/l/financial-services-companies-massachusetts) (153)
- [Pharmaceutical companies in Massachusetts](https://www.tamtam.ai/l/pharmaceutical-companies-massachusetts) (143)
- [Publicly traded companies in Massachusetts](https://www.tamtam.ai/l/publicly-traded-companies-massachusetts) (125)

## 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 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 Minnesota](https://www.tamtam.ai/l/multinational-companies-minnesota) (224)
- [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-massachusetts