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The 100 largest companies in Massachusetts

Tamtam tracks 3,093 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 9,503. Half of them were founded in 1976 or later. The most common headquarters are Boston (39), Cambridge (7) and Burlington (6).

๐Ÿ‡บ๐Ÿ‡ธ Massachusetts100 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Thermo Fisher Scientificthermofisher.com

A global leader in science services, providing innovative technologies and pharmaceutical support to make the world healthier, cleaner, and safer

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Waltham 100,256 n/a
2
GEge.com

Focus on advancing aviation and energy industries through innovative technologies and solutions shared via specialized aerospace and energy platforms.

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Boston 99,488 n/a
3
Fidelity Investmentsfidelity.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 84,668 1946
4
GE Vernovalinktr.ee

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 70,646 n/a
5
The TJX Companies, Inc.jobs.tjx.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Framingham 57,100 n/a
6
Boston Scientificbostonscientific.com

Develops and provides innovative medical technologies including devices and therapies for various diseases, improving patient health and reducing healthcare costs worldwide.

Medical Equipment Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Marlborough 54,633 n/a
7
State Streetstatestreet.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 46,913 1792
8
Boston Consulting Group (BCG)bcg.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 40,412 1963
9
Dunkin'โ€‹dunkindonuts.com

A global franchisor of QSRs serving coffee, baked goods, and ice cream with over 19,000 restaurants worldwide Headquarters in Massachusetts

Food and Beverage Services ๐Ÿ‡บ๐Ÿ‡ธ Canton 38,361 n/a
10
Liberty Mutual Insurancelibertymutualgroup.com

Global leader in property and casualty insurance dedicated to fostering career growth, social responsibility, sustainability, diversity, and innovative solutions for customers worldwide

Insurance ๐Ÿ‡บ๐Ÿ‡ธ Boston 37,734 1912
11
Harvard Universityharvard.edu

An institution dedicated to teaching, learning, and research, producing global leaders across disciplines since 1636 Maintains flagship social media channels

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 34,940 n/a
12
Staplesstaples.com

A leading provider of workspace products and solutions, utilizing human expertise to enhance technology for businesses of all sizes in North America

Retail Office Equipment ๐Ÿ‡บ๐Ÿ‡ธ Framingham 32,875 1986
13
Analog Devicesanalog.com

Global semiconductor company combining analog, digital, and software technologies to advance digitized factories, mobility, healthcare, and climate solutions.

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Wilmington 27,234 n/a
14
Iron Mountainironmountain.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 24,357 n/a
15
Publicis Sapientpublicissapient.com

A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations

Business Consulting and Services ๐Ÿ‡บ๐Ÿ‡ธ Boston 24,251 n/a
16
Bain & Companybain.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 23,729 n/a
17
Massachusetts Institute of Technologyweb.mit.edu

A private research university in Cambridge, Massachusetts, advancing knowledge and educating students in science and technology-focused areas

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 23,586 1861
18
Charles River Laboratoriescriver.com

Guided by strong purpose, creating healthier lives, focusing on therapeutics for patients, animal care, planet well-being, and its passionate, skilled people.

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Wilmington 22,000 1947
19
PPDppd.com

Global clinical development services including laboratory testing, patient recruitment, and data analytics to accelerate drug innovation for pharma, biotech, and government organizations.

Research Services ๐Ÿ‡บ๐Ÿ‡ธ Waltham 20,440 n/a
20
Massachusetts General Hospitalmassgeneral.org

Dedicated to providing top-notch healthcare in a compassionate environment through innovative research and education, improving health in diverse communities served

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 20,001 1811
21
Preplypreply.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Brookline 18,061 2012
22
Virtusavirtusa.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Southborough 18,045 1996
23
Stop & Shopstopandshop.com

Established in 1914, this company operates over 400 stores in the Northeast, prioritizing customer satisfaction, community involvement, and employee development

Retail ๐Ÿ‡บ๐Ÿ‡ธ Quincy 17,955 1914
24
Amazon Fulfillment Technologies & Roboticsamazon.jobs

The company partners people with intelligent robots to enhance order fulfillment accuracy, create new jobs worldwide, and improve customer experience

Software Development ๐Ÿ‡บ๐Ÿ‡ธ North Reading 17,911 2003
25
Mass General Brighammassgeneralbrigham.org

Integrated academic health system providing patient care, research, teaching, and community services through hospitals, insurance, and specialized medical centers.

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Somerville 17,890 n/a
26
Boston Children's Hospitalchildrenshospital.org

A leading pediatric medical center providing comprehensive healthcare services for children from birth to 21 years, with specialized clinical programs and renowned physicians

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 17,496 1869
27
Northeastern Universitynortheastern.edu

Global research university combining experiential learning with cooperative education, offering diverse programs and addressing health, security, and sustainability challenges worldwide.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 17,385 n/a
28
Boston University School of Public Healthbu.edu

Graduate education and research in public health fields, focusing on improving health of vulnerable populations through policy and practice.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 16,431 1976
29
BJ's Wholesale Clubbjs.com

Wholesale club offering members bulk products with a focus on value, service, and a strong company culture for success.

Retail ๐Ÿ‡บ๐Ÿ‡ธ Marlborough 16,273 n/a
30
Boston Universitybu.edu

Leading private research and teaching institution with global presence. Inclusive, serving, and collaborating with Boston since 1869.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 15,935 1869
31
Commonwealth of Massachusettsmass.gov

Innovative government agency in Massachusetts pioneering legislative actions and programs to improve services for millions of people Join us!

Government Administration ๐Ÿ‡บ๐Ÿ‡ธ Boston 14,530 1788
32
Bright Horizonsbrighthorizons.com

Provides on-site childcare, backup care, and education programs to support employees, enhance workplace culture, and develop critical skills.

Education Administration Programs ๐Ÿ‡บ๐Ÿ‡ธ Newton 14,333 1986
33
Keurig Dr Pepper Inc.keurigdrpepper.com

Leading North American beverage company with extensive portfolio including coffee, soft drinks, water, juice, and mixers, strong distribution network.

Food and Beverage Services ๐Ÿ‡บ๐Ÿ‡ธ Burlington 13,948 n/a
34
Santander USsantanderus.com

Provides auto, retail, commercial, and investment banking services alongside wealth management for millions of customers across various US hubs and global markets.

Financial Services ๐Ÿ‡บ๐Ÿ‡ธ Boston 13,806 1857
35
Clean Harborscleanharbors.com

Provider of hazardous waste management, emergency spill response, industrial cleaning, recycling, and used oil re-refining services across North America.

Environmental Services ๐Ÿ‡บ๐Ÿ‡ธ Norwell 13,449 1980
36
MassMutualmassmutual.com

Providing mutual life insurance and financial security services focused on community support, shared dependence, and long-term happiness.

Financial Services ๐Ÿ‡บ๐Ÿ‡ธ Springfield 13,000 n/a
37
Wayfairaboutwayfair.com

Destination for all things home, offering expert customer service, tools for easy shopping, and wide selection to help create personalized spaces

Retail ๐Ÿ‡บ๐Ÿ‡ธ Boston 12,524 2002
38
Harvard Business Schoolhbs.edu

Offers MBA, PhD, executive education, and online programs focused on leadership development, business practice, and entrepreneurship worldwide.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 12,457 1908
39
HubSpothubspot.com

It provides a comprehensive CRM platform with marketing, sales, and service tools, fostering employee growth and a flexible workplace culture.

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 12,229 2006
40
Beth Israel Deaconess Medical Centerbidmc.org

World-class teaching hospital in Boston, part of a health care system focused on expanding access to great care, advancing medicine through research and education

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 12,125 n/a
41
Harvard Medical Schoolhms.harvard.edu

A prestigious medical school fostering a diverse community of leaders dedicated to advancing knowledge, education, and research to alleviate human suffering

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 12,076 n/a
42
University at Buffalobuffalo.edu

Extraordinary community, creative activity and research changing the world. New York State's flagship university, AAU member.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Burlington 11,906 1846
43
Waters Corporationwaters.com

A global leader in analytical instruments and software, pioneering innovations in chromatography, mass spectrometry, and thermal analysis for various sciences

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Milford 11,842 n/a
44
New Balancenewbalance.com

Designing and manufacturing high-quality athletic footwear and apparel with a focus on comfort, fit, innovation, and community support worldwide.

Sporting Goods Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Brighton 11,624 1906
45
University of Massachusetts Amherstumass.edu

A top-ranked teaching and research institution in western Massachusetts with about 28,500 students, part of the University of Massachusetts system

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Amherst 11,525 1863
46
UMass Memorial Healthummhealth.org

Largest healthcare system in Central Massachusetts offering hospital care, outpatient services, medical training, research, and community health support.

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Worcester 10,819 1999
47
Akamai Technologiesakamai.com

A global leader in internet infrastructure, Akamai powers and protects online experiences for billions of users daily through innovative solutions

Technology, Information and Internet ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 10,647 n/a
48
Harvard Business Reviewhbr.org

Provides professionals rigorous insights, best practices to lead effectively, make positive impact, bridging academia and global enterprises.

Book and Periodical Publishing ๐Ÿ‡บ๐Ÿ‡ธ Brighton 9,905 n/a
49
Boston Public Schoolsbostonpublicschools.org

Transforms children's lives through exemplary teaching and community partnerships to develop essential knowledge and skills for success in college, career, and life.

Education Administration Programs ๐Ÿ‡บ๐Ÿ‡ธ Boston 9,504 1647
50
Boston Collegebc.edu

A Jesuit Catholic university in Boston that emphasizes academic excellence, leadership, and service to society

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Chestnut Hill 9,503 n/a
51
EG Americaeg-america.com

A rapidly growing convenience store retailer in the US, part of a global company, offering top-notch products and services nationwide

Retail ๐Ÿ‡บ๐Ÿ‡ธ Westborough 9,343 2019
52
Dana-Farber Cancer Institutedana-farber.org

Providing expert, compassionate care to children and adults with cancer while advancing understanding, treatment, cure, and prevention.

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 8,981 1947
53
athenahealthathenahealth.com

The company strives to simplify healthcare with innovative technology for electronic health records, revenue cycle management, and patient engagement solutions

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Boston 8,956 1997
54
Netcracker Technologynetcracker.com

It is a software company providing critical solutions for service providers, focusing on digital transformation and cloud opportunities worldwide.

Telecommunications ๐Ÿ‡บ๐Ÿ‡ธ Waltham 8,935 1993
55
CDM Smithcdmsmith.com

This company provides comprehensive solutions in water, environment, transportation, energy, and facilities to worldwide public and private clients

Civil Engineering ๐Ÿ‡บ๐Ÿ‡ธ Boston 8,617 1947
56
PTCptc.com

It provides solutions for manufacturers to enhance product differentiation, operational excellence, and workforce productivity through digital transformation and technology.

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Boston 8,184 n/a
57
Tufts Universitytufts.edu

Research university fostering innovation, creativity, and global citizenship through a unique blend of research and liberal arts education.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Medford 7,773 1852
58
Toastpos.toasttab.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 7,762 2011
59
Biogenbiogen.com

Company pioneers innovative science, delivering new medicines to transform patients' lives, with a global presence and focus on superior treatment outcomes.

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 7,724 n/a
60
Sensata Technologiessensata.com

Supplier of sensing, electrical protection, control, and power management solutions enhancing safety, efficiency, and comfort across multiple industries worldwide.

Appliances, Electrical, and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Attleboro 7,634 n/a
61
UniFirst Corporationunifirst.com

Supply and service of uniforms, workwear, safety products, and facility services with manufacturing and specialized garment programs.

Textile Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Wilmington 7,485 1936
62
Temutemu.com

Online marketplace connecting consumers with millions of merchandise partners, manufacturers, and brands offering affordable products worldwide.

Technology, Information and Internet ๐Ÿ‡บ๐Ÿ‡ธ Boston 7,373 n/a
63
UMass Memorial Medical Centerummhealth.org

A trusted academic medical center in Central Massachusetts, providing comprehensive and award-winning care through cutting-edge technology and highly trained specialists

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Worcester 7,256 n/a
64
Hologic, Inc.hologic.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Marlborough 6,921 1985
65
Modernamodernatx.com

Pioneering mRNA technology for new medicines to improve patient lives by providing real-time instructions for protein production in cells

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 6,906 2010
66
Partners HealthCarepartners.org

Integrated healthcare system offering coordinated care, high-quality services, research, teaching, and community outreach through academic medical centers and various healthcare entities

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Somerville 6,751 1994
67
Bose Corporationbose.com

Develops advanced audio technologies and products for home, automotive, portable, and public spaces, enhancing music listening experiences worldwide.

Computers and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Framingham 6,699 n/a
68
Entegrisentegris.com

A global leader in advanced science-based solutions for technology challenges, driving innovation with artificial intelligence, augmented reality, and IoT technologies

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Billerica 6,612 n/a
69
Harvard Business School Executive Educationexed.hbs.edu

Executive Education provider offering open-enrollment and custom learning solutions for executives to enhance management skills and drive corporate advantage

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,425 n/a
70
Vertex Pharmaceuticalsvrtx.com

Global biotechnology company focusing on creating medicines for serious and life-threatening diseases, with a pioneering history in treating cystic fibrosis

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,382 1989
71
UMass Chan Medical Schoolumassmed.edu

Trains doctors, scientists, and nurses, conducts groundbreaking research and clinical trials, offers consulting services, and manufactures vaccines and biologics.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Worcester 6,314 n/a
72
Baystate Healthbaystatehealth.org

Largest healthcare organization in western Massachusetts providing quality, compassionate care across hospitals, improving community health and economic impact.

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Springfield 6,269 1873
73
Vistavistaprint.com

Global design and marketing partner for small businesses worldwide, providing full-service solutions for physical and digital presence to achieve success

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Waltham 6,238 1995
74
Teradyneteradyne.com

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 ๐Ÿ‡บ๐Ÿ‡ธ North Reading 6,210 1960
75
Rich Products Corporationrichs.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Burlington 6,208 1945
76
American Toweramericantower.com

Global provider of digital infrastructure supporting mobile and broadband networks, enabling connectivity, innovation, and bridging digital divides worldwide.

Telecommunications ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,111 1995
77
Cultural Care Au Pairculturalcare.com

Connecting international au pairs with American families for childcare, cultural exchange, and enriching year-long experiences in the USA.

Individual and Family Services ๐Ÿ‡บ๐Ÿ‡ธ Cambridge 6,091 1989
78
Dynatracedynatrace.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,090 n/a
79
Tufts Medical Centertuftsmedicine.org

Academic medical center offering exceptional care in New England, specializing in primary care, trauma, heart transplants, and various specialties Conducts medical research and education

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,018 1796
80
CEOchasedimond.com

The company provides expert insights and guidance in finance, investing, and capital markets to empower clients in making wealth-enhancing decisions

Business Consulting and Services ๐Ÿ‡บ๐Ÿ‡ธ Boston 6,006 2015
81
Ascend Learningascendlearning.com

Provides learning technology and certification products for healthcare and licensure-driven careers, supporting professionals across various high-growth industries.

E-Learning Providers ๐Ÿ‡บ๐Ÿ‡ธ Burlington 5,982 n/a
82
IDCidc.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 5,917 1964
83
Veolia | North Americaveolianorthamerica.com

Provides resource management solutions including water decontamination, toxic waste handling, fossil fuel alternatives, wastewater reuse, and battery recycling for cities and industries.

Environmental Services ๐Ÿ‡บ๐Ÿ‡ธ Boston 5,812 n/a
84
Tripadvisortripadvisor.com

A leading travel guidance platform with 1 billion reviews, offering deals on accommodations, experiences, and restaurants to help travelers plan their trips

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Needham 5,762 n/a
85
DraftKings Inc.careers.draftkings.com

The company is committed to creating popular games and betting experiences, leading the way in sports entertainment, innovation, and global collaboration

Mobile Gaming Apps ๐Ÿ‡บ๐Ÿ‡ธ Boston 5,760 2012
86
uTestutest.com

A testing community with over 1 million worldwide testers Learn more at a provided website

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Framingham 5,680 2007
87
Lionbridgelionbridge.com

This company specializes in translation and localization services in over 350 languages, connecting global brands with customers worldwide through cultural experiences

Translation and Localization ๐Ÿ‡บ๐Ÿ‡ธ Waltham 5,583 1996
88
Pegasystemspega.com

It provides a low-code platform for organizations to enhance agility, automate workflows, and address business challenges using AI technology.

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Waltham 5,569 n/a
89
eClinicalWorkseclinicalworks.com

It provides Electronic Health Record and Practice Management solutions to medical professionals, enhancing care quality and reducing costs through technology.

Software Development ๐Ÿ‡บ๐Ÿ‡ธ Westborough 5,426 1999
90
Insulet Corporationinsulet.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Acton 5,407 2000
91
Staples Business Advantagestaplesadvantage.com

A provider of products and services for organizations, including office supplies, technology, promotional products, furniture, and facility supplies, with personalized account support

Business Supplies & Equipment ๐Ÿ‡บ๐Ÿ‡ธ Framingham 5,279 1985
92
Lahey Hospital & Medical Centerlahey.org

A physician-led, nonprofit group practice offering compassionate care, superior patient outcomes, personalized treatment plans, advanced technology, research, and medical education

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Burlington 5,147 1923
93
Alexion Pharmaceuticals, Inc.alexion.com

Development of innovative medicines targeting rare diseases, focusing on complement system biology, expanding global reach to serve patients worldwide.

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Boston 5,112 1992
94
Kaleida Healthkaleidahealth.org

Leading healthcare provider in Western New York offering state-of-the-art technology, comprehensive services, and compassionate care to over one million patients annually

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Burlington 5,060 n/a
95
John Hancockjohnhancock.com

Providing life insurance, financial planning, and community support services focused on helping customers achieve healthier, longer, and better lives.

Financial Services ๐Ÿ‡บ๐Ÿ‡ธ Boston 5,048 n/a
96
Xceedancexceedance.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Boston 4,963 2013
97
The Stepping Stones Group, LLCthesteppingstonesgroup.com

Providing exceptional therapeutic and behavioral services to children and families in schools, homes, and clinics across 42 states

Hospitals and Health Care ๐Ÿ‡บ๐Ÿ‡ธ Boston 4,862 2014
98
Brukerbruker.com

Development and provision of advanced analytical instrumentation and solutions for research, industrial production, quality assurance, and process reliability worldwide.

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Billerica 4,824 1960
99
University of Massachusetts Lowelluml.edu

Public university offering affordable, high-quality education with hands-on learning, accredited programs, and strong student support for career readiness.

Higher Education ๐Ÿ‡บ๐Ÿ‡ธ Lowell 4,772 1894
100
MKS Inc.mks.com

provides technology solutions including instruments, systems, and specialty chemicals for semiconductor manufacturing, electronics, packaging, and specialty industrial applications

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Andover 4,581 1961

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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 Oct 24, 2026.

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