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Companies with in-house R&D headquartered in Massachusetts

Tamtam tracks 396 companies with in-house R&D headquartered in Massachusetts. This list ranks the 100 largest by number of employees on LinkedIn, led by Thermo Fisher Scientific, GE and GE Vernova. Their median headcount is 4,385. Half of them were founded in 1985 or later. The most common headquarters are Boston (33), Cambridge (12) and Waltham (7).

馃嚭馃嚫 Massachusetts100 companiesUpdated Nov 11, 2026

This selection of companies with in-house R&D in Massachusetts comprises mostly large corporations. They operate across diverse sectors, including biotechnology, medical equipment, higher education, and industrial machinery. Key players include Thermo Fisher Scientific, a global leader in science services; GE, focusing on aviation and energy industries; Boston Scientific, which develops medical technologies; and Harvard University, dedicated to teaching and research.

A notable pattern among these companies is their strong presence in Boston and Cambridge, indicating a concentration of research and development activities in these urban centers. The list also highlights a mix of well-established institutions like Harvard University, founded in 1636, and more recent technology companies such as Amazon Fulfillment Technologies & Robotics, established in 2003.

#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 馃嚭馃嚫 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 馃嚭馃嚫 Boston 99,488 n/a
3
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 馃嚭馃嚫 Boston 70,646 n/a
4
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 馃嚭馃嚫 Marlborough 54,633 n/a
5
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 馃嚭馃嚫 Cambridge 34,940 n/a
6
Analog Devicesanalog.com

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

Semiconductor Manufacturing 馃嚭馃嚫 Wilmington 27,234 n/a
7
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 馃嚭馃嚫 Boston 24,251 n/a
8
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 馃嚭馃嚫 Cambridge 23,586 1861
9
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 馃嚭馃嚫 Wilmington 22,000 1947
10
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 馃嚭馃嚫 Waltham 20,440 n/a
11
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 馃嚭馃嚫 Boston 20,001 1811
12
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 馃嚭馃嚫 North Reading 17,911 2003
13
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 馃嚭馃嚫 Somerville 17,890 n/a
14
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 馃嚭馃嚫 Boston 17,496 1869
15
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 馃嚭馃嚫 Burlington 13,948 n/a
16
Wayfairaboutwayfair.com

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

Retail 馃嚭馃嚫 Boston 12,524 2002
17
Harvard Business Schoolhbs.edu

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

Higher Education 馃嚭馃嚫 Boston 12,457 1908
18
HubSpothubspot.com

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

Software Development 馃嚭馃嚫 Cambridge 12,229 2006
19
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 馃嚭馃嚫 Boston 12,076 n/a
20
University at Buffalobuffalo.edu

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

Higher Education 馃嚭馃嚫 Burlington 11,906 1846
21
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 馃嚭馃嚫 Milford 11,842 n/a
22
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 馃嚭馃嚫 Brighton 11,624 1906
23
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 馃嚭馃嚫 Amherst 11,525 1863
24
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 馃嚭馃嚫 Worcester 10,819 1999
25
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 馃嚭馃嚫 Cambridge 10,647 n/a
26
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 馃嚭馃嚫 Boston 8,981 1947
27
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 馃嚭馃嚫 Boston 8,956 1997
28
Netcracker Technologynetcracker.com

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

Telecommunications 馃嚭馃嚫 Waltham 8,935 1993
29
PTCptc.com

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

Software Development 馃嚭馃嚫 Boston 8,184 n/a
30
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 馃嚭馃嚫 Boston 7,762 2011
31
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 馃嚭馃嚫 Cambridge 7,724 n/a
32
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 馃嚭馃嚫 Attleboro 7,634 n/a
33
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 馃嚭馃嚫 Marlborough 6,921 1985
34
Modernamodernatx.com

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

Biotechnology Research 馃嚭馃嚫 Cambridge 6,906 2010
35
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 馃嚭馃嚫 Somerville 6,751 1994
36
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 馃嚭馃嚫 Framingham 6,699 n/a
37
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 馃嚭馃嚫 Billerica 6,612 n/a
38
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 馃嚭馃嚫 Boston 6,382 1989
39
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 馃嚭馃嚫 Springfield 6,269 1873
40
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 馃嚭馃嚫 North Reading 6,210 1960
41
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 馃嚭馃嚫 Boston 6,090 n/a
42
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 馃嚭馃嚫 Boston 5,812 n/a
43
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 馃嚭馃嚫 Boston 5,760 2012
44
Pegasystemspega.com

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

Software Development 馃嚭馃嚫 Waltham 5,569 n/a
45
eClinicalWorkseclinicalworks.com

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

Software Development 馃嚭馃嚫 Westborough 5,426 1999
46
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 馃嚭馃嚫 Acton 5,407 2000
47
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 馃嚭馃嚫 Boston 5,112 1992
48
Brukerbruker.com

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

Biotechnology Research 馃嚭馃嚫 Billerica 4,824 1960
49
MKS Inc.mks.com

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

Semiconductor Manufacturing 馃嚭馃嚫 Andover 4,581 1961
50
Rocket Softwarerocketsoftware.com

Partner for organizations transforming IT infrastructure, applications, and data from core systems to cloud with global support and innovation.

IT Services and IT Consulting 馃嚭馃嚫 Waltham 4,385 n/a

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51
Progress Softwareprogress.com

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 馃嚭馃嚫 Burlington 4,212 1981
52
SharkNinjasharkninja.com

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 馃嚭馃嚫 Needham 4,199 1994
53
Quantiphiquantiphi.com

An AI-first digital engineering company that solves complex business problems with industry experience, cloud, data engineering, and cutting-edge AI research

IT Services and IT Consulting 馃嚭馃嚫 Marlborough 4,105 2013
54
Aspen Technologyaspentech.com

Global software leader enabling industries to meet demand sustainably by optimizing asset design, operation, and maintenance lifecycle for improved operational excellence

Software Development 馃嚭馃嚫 Bedford 4,065 n/a
55
Roswell Park Comprehensive Cancer Centerroswellpark.org

A comprehensive cancer center offering cutting-edge care, research, and education to reduce the cancer burden and set national standards

Hospitals and Health Care 馃嚭馃嚫 Burlington 3,751 1898
56
Cabot Corporationcabotcorp.com

Global specialty chemical and performance materials company providing solutions to address current challenges and future customer needs worldwide.

Chemical Manufacturing 馃嚭馃嚫 Boston 3,719 1882
57
MEDITECHehr.meditech.com

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 馃嚭馃嚫 Canton 3,702 1969
58
Revvityrevvity.com

Revvity specializes in innovative health science solutions, technologies, and services for healthcare advancements worldwide, covering discovery, development, and diagnosis to cure

Biotechnology Research 馃嚭馃嚫 Waltham 3,569 2023
59
University of Massachusettsyoutube.com

Public university system offering high-quality education, conducting extensive research, and providing impactful public service to communities locally and globally.

Higher Education 馃嚭馃嚫 Boston 3,476 1863
60
BeOne Medicinesbeonemedicines.com

Developing innovative, affordable cancer treatments for hematology and solid tumors with a global team and collaborative approach.

Pharmaceutical Manufacturing 馃嚭馃嚫 Cambridge 3,350 2010
61
Rapid7rapid7.com

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 馃嚭馃嚫 Boston 3,268 n/a
62
Broad Institute of MIT and Harvardbroadinstitute.org

Multidisciplinary teams collaborate across labs and programs to address complex biomedical challenges in human biology and disease worldwide.

Research Services 馃嚭馃嚫 Cambridge 3,204 2003
63
Saint-Gobain Abrasivessaint-gobain-surfacesolutions.com

The company offers powerful and precise abrasives solutions for various markets, focusing on customization, performance, and safety with global presence

Industrial Machinery Manufacturing 馃嚭馃嚫 Worcester 3,196 1885
64
Preciselyprecisely.com

Provides data integrity solutions that enhance data quality, integrate datasets, and support analytics for organizations worldwide, ensuring reliable business insights.

Software Development 馃嚭馃嚫 Burlington 3,014 n/a
65
CCL Labelccllabel.com

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 馃嚭馃嚫 Framingham 2,988 1951
66
Draperdraper.com

A nonprofit engineering innovation company advancing technologies for national security through collaboration with government, academia, and industry to solve complex challenges

Defense and Space Manufacturing 馃嚭馃嚫 Cambridge 2,932 n/a
67
Suffolk Constructionsuffolk.com

National construction management firm providing real estate investment, design, self-perform construction, technology investment, and innovation research services across multiple industries.

Construction 馃嚭馃嚫 Boston 2,923 1982
68
Viant Medicalviantmedical.com

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 馃嚭馃嚫 Foxborough 2,921 n/a
69
Klaviyoklaviyo.com

Unified customer platform empowering brands with ownership of consumer data to automate personalized email/SMS communications, foster customer relationships, and drive growth

Marketing Services 馃嚭馃嚫 Boston 2,902 2012
70
Alnylam Pharmaceuticalsalnylam.com

A global biotech company pioneering RNAi therapeutics to treat rare genetic diseases, with a breakthrough product and a robust pipeline

Biotechnology Research 馃嚭馃嚫 Cambridge 2,883 2002
71
CyberArkcyberark.com

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 馃嚭馃嚫 Newton 2,712 1999
72
NETSCOUTnetscout.com

This company provides a Visibility Without Borders platform to help essential organizations manage complex networks, unlock insights, anticipate problems, and stay unstoppable

Software Development 馃嚭馃嚫 Westford 2,708 1984
73
Acushnet Companyemployment.acushnetgolf.com

Leading golf company offering high-quality golf equipment, apparel, and accessories for serious and recreational golfers worldwide.

Manufacturing 馃嚭馃嚫 Fairhaven 2,611 n/a
74
Cognex Corporationcognex.com

Advanced machine vision technology enabling manufacturing and distribution companies to improve quality, efficiency, and automation with AI-powered vision sensors and systems.

Automation Machinery Manufacturing 馃嚭馃嚫 Natick 2,580 1981
75
EMCdell.com

Logo update for a company former owner was EMC, now owned by Dell The company's original logo is being reinstated

IT Services and IT Consulting 馃嚭馃嚫 Hopkinton 2,532 n/a
76
Spaulding Rehabilitation Hospitalspauldingrehab.org

A leading rehabilitation facility providing comprehensive treatment, part of a network with specialty hospitals, skilled nursing facilities, and outpatient centers in Eastern Massachusetts

Hospitals and Health Care 馃嚭馃嚫 Boston 2,441 1971
77
Abiomedabiomed.com

A leading provider of medical technology based in Danvers, MA, offering products for circulatory support and oxygenation to help patients recover

Medical Equipment Manufacturing 馃嚭馃嚫 Danvers 2,388 1981
78
Semrushsemrush.com

A leading online visibility management platform offering a suite of marketing tools to help companies improve their online presence and results

Software Development 馃嚭馃嚫 Boston 2,357 2008
79
argenxargenx.com

Global immunology company focused on developing novel antibody-based medicines for severe autoimmune diseases through collaborations with leading researchers

Biotechnology Research 馃嚭馃嚫 Boston 2,315 2008
80
Mercury Systemsmrcy.com

A technology company pushing processing power to the tactical edge for aerospace and defense missions, enabling innovation and decision superiority worldwide

Defense and Space Manufacturing 馃嚭馃嚫 Andover 2,300 1981
81
McLean Hospitalmcleanhospital.org

A leading psychiatric hospital dedicated to treating mental health conditions, conducting innovative research, and providing education to improve patient outcomes

Mental Health Care 馃嚭馃嚫 Belmont 2,296 1811
82
Curium Pharmacuriumpharma.com

Global leader in nuclear medicine, providing life-changing diagnostics and treatment for cancer patients worldwide through innovative radiopharmaceutical products and AI-driven solutions

Pharmaceutical Manufacturing 馃嚭馃嚫 Boston 2,236 2017
83
OutSystemsoutsystems.com

Provides an AI development platform for enterprises to rapidly build custom applications and AI agents while modernizing legacy core business systems.

Software Development 馃嚭馃嚫 Boston 2,228 2001
84
Perkperk.com

A hyper-growth SaaS business travel platform revolutionizing business travel with an all-in-one solution for companies and organizations worldwide

Technology, Information and Internet 馃嚭馃嚫 Boston 2,228 2015
85
Novanta Inc.novanta.com

Supplier of advanced technology solutions in precision medicine, manufacturing, robotics, and surgery, enabling high-performance, tailored equipment for OEMs.

Manufacturing 馃嚭馃嚫 Bedford 2,189 n/a
86
MACOMmacom.com

A semiconductor company with expertise in Data Center, Telecommunication, and Industrial/Defense applications, offering design, manufacturing, and distribution services globally

Semiconductor Manufacturing 馃嚭馃嚫 Lowell 2,182 1950
87
InterSystemsintersystems.com

InterSystems provides data platforms and connected care solutions for healthcare, business, and government to drive better decisions and outcomes worldwide

Software Development 馃嚭馃嚫 Boston 2,127 1978
88
Symboticsymbotic.com

This company develops innovative robotics and software for advanced automation solutions in the supply chain industry to increase efficiency and profitability

Automation Machinery Manufacturing 馃嚭馃嚫 Wilmington 2,074 2007
89
BCG Xbcg.com

Builds and designs platforms and software with advanced tech knowledge and entrepreneurship to enable innovation and address challenges for organizations.

Technology, Information and Internet 馃嚭馃嚫 Boston 2,033 n/a
90
ArisGlobalarisglobal.com

Transforms life sciences companies by automating drug development with an integrated technology platform, boosting efficiency, ensuring compliance, and reducing costs.

Software Development 馃嚭馃嚫 Waltham 2,028 1987
91
HP Hood LLChood.com

Established in 1846, this company is a leading dairy processor in the US, known for high-quality dairy products under various brands

Food and Beverage Manufacturing 馃嚭馃嚫 Lynnfield 2,006 1846
92
Brooks Automationbrooks.com

Provider of automation solutions for the semiconductor industry, specializing in robotics, automation systems, and contamination control to empower chip manufacturers worldwide

Semiconductor Manufacturing 馃嚭馃嚫 Chelmsford 1,982 1978
93
BeiGenebeonemedicines.com

Global oncology company developing accessible and affordable cancer treatments through innovative research, collaborations, and commitment to improving medicine access for patients worldwide

Biotechnology Research 馃嚭馃嚫 Cambridge 1,967 2010
94
Harvard Medical School and Massachusetts General Hospitalmassgeneral.org

A prestigious hospital affiliated with Harvard Medical School, offering clinical experience and clerkships while supporting a large research enterprise

Higher Education 馃嚭馃嚫 Boston 1,967 1811
95
Werfen North Americawerfen.com

Worldwide leader specialized diagnostics: hemostasis, acute care, transfusion, autoimmunity, transplant. Operates in over 100 territories, with headquarters in Barcelona, Spain, and technology centers in the US and Europe.

Medical Equipment Manufacturing 馃嚭馃嚫 Bedford 1,933 1959
96
Duck Creek Technologiesduckcreek.com

Provides cloud-based software solutions for property, casualty, and general insurance industries enabling agile, intelligent, and transparent insurance operations.

Software Development 馃嚭馃嚫 Boston 1,904 2000
97
IPG Photonicsipgphotonics.com

Global leader in fiber laser technology, providing reliable and efficient laser solutions across various industries with a strong focus on innovation and customer needs

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Oxford 1,901 n/a
98
Creation Technologiescreationtech.com

Global Electronics Manufacturing Services provider with 14 locations worldwide offering Full Product Development, Manufacturing, Test & Design Services for OEMs in various industries

Manufacturing 馃嚭馃嚫 Boston 1,882 1991
99
Sovossovos.com

Sovos provides scalable, secure, and user-friendly IT solutions for businesses to navigate global compliance regulations, serving Fortune 500 companies and organizations worldwide

Software Development 馃嚭馃嚫 Wilmington 1,861 2015
100
Mass General Hospitalmassgeneral.org

A higher education company located in Cambridge, Massachusetts, United States, specializing in providing healthcare services and medical research at Mass General Hospital

Higher Education 馃嚭馃嚫 Cambridge 1,839 n/a

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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 Nov 11, 2026.

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