The 26 largest companies in Belmont (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	RingCentral ringcentral.com It provides AI-driven cloud business communications, contact center, video, and hybrid event solutions to enhance customer and employee interactions.	Software Development	🇺🇸 Belmont	6,731	1999
2	Vallen USA vallen.com Leading provider of indirect industrial supplies, safety services, and integrated supply solutions, meeting maintenance, repair, and production needs with local expertise	Wholesale	🇺🇸 Belmont	2,743	n/a
3	McLean Hospital mcleanhospital.org A leading psychiatric hospital dedicated to treating mental health conditions, conducting innovative research, and providing education to improve patient outcomes	Mental Health Care	🇺🇸 Belmont	2,296	1811
4	St John WA stjohnwa.com.au A charitable organization providing high-quality first aid services in Western Australia for over 130 years, through career paramedics and volunteer services	Hospitals and Health Care	🇺🇸 Belmont	1,378	1887
5	Your Mom's House yourmoms.com They offer creative designs to help individuals express their colorful side in a unique and personalized way	Retail	🇺🇸 Belmont	1,363	2020
6	Vallen - Formerly Industrial Distribution Group (IDG)vallen.com Market leader in designing, building, and managing supply chain solutions, specializing in indirect materials distribution for global companies with cost-saving initiatives	Truck Transportation	🇺🇸 Belmont	589	n/a
7	Belmont Abbey College belmontabbeycollege.edu A private Catholic college near Charlotte, NC, offering quality academics rooted in Benedictine heritage to develop the whole person	Higher Education	🇺🇸 Belmont	589	1876
8	Nikon Precision Inc.nikonprecision.com Innovative semiconductor lithography and inspection systems company, leveraging over a century of expertise to provide solutions for customers worldwide	Semiconductor Manufacturing	🇺🇸 Belmont	574	n/a
9	Wilbert Plastic Services wilbertplasticservices.com A leading custom thermoforming and injection-molding company with 50+ years of experience, offering innovative processes to bring products to market faster	Plastics Manufacturing	🇺🇸 Belmont	470	1965
10	Notre Dame de Namur University ndnu.edu A Catholic, not-for-profit university promoting academic excellence, social justice, and community engagement, offering programs in business, education, psychology, and teacher credentialing	Higher Education	🇺🇸 Belmont	436	1851
11	Vallen vallen.com Industry leader optimizing indirect material supply chain to deliver real, transparent savings in North America	Wholesale	🇺🇸 Belmont	365	1865
12	Communication Arts commarts.com Creative magazine covering design, advertising, illustration, photography, interactive media, and typography through juried Annuals, profiles, and informative columns	Design Services	🇺🇸 Belmont	333	1959
13	RediMed redimed.com.au RediMed provides holistic healthcare solutions for businesses, offering services such as medical assessments, injury management, allied health support, and telehealth	Medical Practices	🇺🇸 Belmont	310	2008
14	AvaSure avasure.com An intelligent virtual care platform for healthcare providers to engage with patients, optimize staffing, and blend remote and in-person care seamlessly at scale	Hospitals and Health Care	🇺🇸 Belmont	240	2008
15	RingCentral Events ringcentral.com Connect people, build communities, and empower businesses through various products like StreamYard, Session, Streamable, and Hopin Events Join millions already benefiting	Events Services	🇺🇸 Belmont	230	2019
16	Volkswagen Group of America Innovation and Engineering Center California (IECC)vwiecc.com A team in Silicon Valley applies research and development to innovate for Volkswagen Group's brands, combining German engineering with entrepreneurial spirit	Motor Vehicle Manufacturing	🇺🇸 Belmont	183	1999
17	Hone hone.rest This company helps restaurants increase profits by providing accounting services, software, operating reports, and insights to make data-driven decisions	Restaurants	🇺🇸 Belmont	178	2020
18	Williams Form Engineering Corp.williamsform.com This company manufactures threaded steel bars and accessories for rock, soil, and concrete anchors, post-tensioning systems, and concrete forming hardware in construction industry	Industrial Machinery Manufacturing	🇺🇸 Belmont	176	1922
19	City of Belmont CA belmont.gov This organization focuses on providing infrastructure, mobility options, fostering a business community, maintaining safe neighborhoods, and promoting recreational and cultural opportunities in Belmont, California	Government Administration	🇺🇸 Belmont	172	n/a
20	Belmont Public Schools (MA)belmont.k12.ma.us Full-inclusion school system in Belmont, MA educating 5,000 students across multiple grade levels, emphasizing holistic development and creating engaged learners	Education Administration Programs	🇺🇸 Belmont	169	n/a
21	Holy Angels, Inc.holyangelsnc.org A non-profit organization providing compassionate care, therapeutic services, and vocational training for individuals with intellectual developmental disabilities and medical conditions	Non-profit Organizations	🇺🇸 Belmont	164	1955
22	Belmont High School belmont.k12.ma.us Established in 1865, we prioritize academic excellence, faculty distinction, and student growth to cultivate engaged learners dedicated to serving others	Primary and Secondary Education	🇺🇸 Belmont	154	1865
23	Carlmont High School carlmonths.org A public high school in Belmont, California, serving grades 9-12 as part of the Sequoia Union High School District, recognized as a California Distinguished School	Education Administration Programs	🇺🇸 Belmont	148	n/a
24	Embarcadero Capital Partners embarcaderocapitalpartners.com A private real estate investment, management, and development firm focusing on dynamic US markets with intellectual capital and creative business cultures	Real Estate	🇺🇸 Belmont	42	2002
25	Neptune Society of Northern California neptune-society.com A leading Northern California provider of affordable cremation services, with well-trained professionals, crematory equipment, removal vehicles, chapels, and a 24-hour Membership Services Center	Consumer Services	🇺🇸 Belmont	25	n/a
26	Knightsbridge Advisers LLC knightsbridgevc.com This company specializes in building portfolios of venture capital relationships, providing institutional investors access to top-performing venture managers for investments in growth equity partnerships	Venture Capital and Private Equity Principals	🇺🇸 Belmont	24	1983

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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 Oct 24, 2026.

The same list elsewhere in United States

The largest companies in the United States 91,669
The largest companies in California 12,813
The largest companies in New York State 10,485
The largest companies in Texas 8,086
The largest companies in Florida 4,945
The largest companies in Illinois 4,175
The largest companies in Pennsylvania 3,110
The largest companies in Massachusetts 3,093
The largest companies in Georgia 2,632
The largest companies in Ohio 2,618
The largest companies in New Jersey 2,569
The largest companies in Virginia 2,503
The largest companies in Michigan 2,346
The largest companies in North Carolina 2,174
The largest companies in Alabama 1,806
The largest companies in Washington State 1,785
The largest companies in Colorado 1,774
The largest companies in Minnesota 1,700
The largest companies in Maryland 1,527
The largest companies in Wisconsin 1,482
The largest companies in New York 6,920
The largest companies in San Francisco 2,030
The largest companies in Houston 1,791
The largest companies in Chicago 1,668