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Publicly traded companies headquartered in Boston

Tamtam tracks 28 publicly traded companies headquartered in Boston. This list ranks all of them by number of employees on LinkedIn, led by GE, State Street and Iron Mountain. Their median headcount is 2,530. Half of them were founded in 2002 or later.

馃嚭馃嚫 Boston28 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
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
2
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 馃嚭馃嚫 Boston 46,913 1792
3
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 馃嚭馃嚫 Boston 24,357 n/a
4
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
5
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
6
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
7
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
8
American Toweramericantower.com

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

Telecommunications 馃嚭馃嚫 Boston 6,111 1995
9
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
10
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
11
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
12
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
13
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
14
Haemoneticshaemonetics.com

A global healthcare company offering innovative medical products and solutions to improve patient care and reduce healthcare costs in various medical markets

Medical Equipment Manufacturing 馃嚭馃嚫 Boston 2,530 1971
15
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
16
The Boston Beer Companybostonbeer.com

A passionate beer company with 40 years of brewing experience, focused on cultivating talent and pushing boundaries while having fun

Food and Beverage Services 馃嚭馃嚫 Boston 2,262 1984
17
Flywireflywire.com

Global payments enablement and software company combining proprietary networks with vertical-specific technology to streamline complex billing across education, healthcare, travel, and B2B sectors.

Software Development 馃嚭馃嚫 Boston 1,308 n/a
18
Orbiaorbia.com

A global company tackling challenges in water and food security, information access, connectivity, and energy transition across various sectors

Utilities 馃嚭馃嚫 Boston 1,300 n/a
19
Boston Properties (BXP)linkedin.com

Real estate investment and development across six major U.S. regions, focusing on premier workplace properties and national growth.

Real Estate 馃嚭馃嚫 Boston 630 1970
20
Ginkgo Bioworksginkgo.bio

Using biology to design, develop, and optimize products for various commercial applications, with a focus on sustainable solutions and promoting diversity and inclusion

Biotechnology Research 馃嚭馃嚫 Boston 532 2009
21
Rhythm Pharmaceuticals Inc.rhythmtx.com

A biopharmaceutical developing therapies for rare MC4R pathway diseases using the Rhythm Engine to improve understanding, diagnosis, and treatment

Biotechnology Research 馃嚭馃嚫 Boston 471 2008
22
Allied Mindsalliedminds.com

Early-stage investor in technology and life sciences, originating from US federally funded labs and universities, focusing on breakthrough science in connectivity, space, and medical devices

Venture Capital and Private Equity Principals 馃嚭馃嚫 Boston 400 n/a
23
SeaChange Internationalseachange.com

A leading provider of Video Delivery Software Solutions, powering cloud and on-premise platforms for over 50 million subscribers worldwide

Telecommunications 馃嚭馃嚫 Boston 375 1993
24
CRISPR Therapeuticscrisprtx.com

A leading gene editing company developing gene-based medicines for serious diseases, using CRISPR/Cas9 technology and collaborating with industry leaders

Biotechnology Research 馃嚭馃嚫 Boston 351 2013
25
Praxis Precision Medicines, Inc.praxismedicines.com

Clinical-stage biopharmaceutical company developing therapies for CNS disorders by translating genetic insights into selecting biological targets for rare and prevalent neurological disorders

Biotechnology Research 馃嚭馃嚫 Boston 233 n/a
26
CloudCallcloudcall.com

The company offers a communication system that integrates with CRM to improve productivity, data quality, and capture all conversations for sales and recruitment teams

Software Development 馃嚭馃嚫 Boston 69 2011
27
Elicio Therapeuticselicio.com

Clinical-stage biotech company developing novel lymph node-targeted immunotherapies to enhance the immune system's cancer-fighting capabilities against aggressive cancers

Biotechnology Research 馃嚭馃嚫 Boston 47 n/a
28
RONA Glasswareronausa.com

A European glassworks company with over 130 years of history, known for producing luxurious, durable glassware tailored to evolving styles

Glass Product Manufacturing 馃嚭馃嚫 Boston 2 1892

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 2, 2026.

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