# Top 30 multinational companies in Boston

Tamtam tracks 241 multinational companies headquartered in Boston. This list ranks the 30 largest by number of employees on LinkedIn, led by GE, Fidelity Investments and GE Vernova. Their median headcount is 6,382. Half of them were founded in 1963 or later.

These Boston-headquartered companies represent a mix of established multinational corporations and a few younger firms, primarily in financial services, technology, and consulting. Notable examples include Fidelity Investments, offering diversified financial services, and GE Vernova, focused on electrifying and decarbonizing the planet. Boston Consulting Group (BCG) is a global management consulting firm, while Iron Mountain specializes in storage and information management. Wayfair is a destination for home goods, and Vertex Pharmaceuticals develops medicines for serious diseases.

A clear pattern among these companies is their global reach, with many operating across diverse international markets. The presence of several financial services and consulting firms, alongside significant technology and industrial players, indicates a diversified but mature corporate landscape in Boston.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |  |
| 2 | [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 |
| 3 | [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 |  |
| 4 | [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 |
| 5 | [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 |
| 6 | [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 |
| 7 | [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 |  |
| 8 | [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 |  |
| 9 | [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 |  |
| 10 | [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 |
| 11 | [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 |
| 12 | [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 |  |
| 13 | [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 |
| 14 | [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 |  |
| 15 | [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 |
| 16 | [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 |
| 17 | [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 |  |
| 18 | [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 |
| 19 | [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 |  |
| 20 | [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 |
| 21 | [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 |
| 22 | [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 |
| 23 | [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 |
| 24 | [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 |
| 25 | [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 |  |
| 26 | [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 |
| 27 | [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 |
| 28 | [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 |
| 29 | [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 |
| 30 | [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 |

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