| # | Company | Employees |
|---|---|---|
| 1 | 4,581 | |
| 2 |
Mercury Systemsmrcy.com
A technology company pushing processing power to the tactical edge for aerospace and defense missions, enabling innovation and decision superiority worldwide |
2,300 |
| 3 | 1,321 | |
| 4 |
Vicorvicorpower.com
Designs and manufactures modular power components and complete power systems for computing, industrial, telecom, transportation, aerospace, and defense markets. |
998 |
| 5 |
Navisitenavisite.com
Digital transformation partner providing specialized teams, industry solutions, and advisory services for modernizing businesses with cloud, application, data management, and cybersecurity solutions |
952 |
| 6 |
Phillips Academyandover.edu
Coeducational independent high school with rigorous academic programs, diverse community, serving approximately 1,100 students since 1778. |
810 |
| 7 |
Aras Corporationaras.com
Provider of product lifecycle management and digital thread solutions enabling flexible, rapid delivery of connected product data and processes. |
788 |
| 8 |
Grace Lutheran Churchgrace-andover.org
A company that believes in forgiveness, grace, love, and compassion, transforming lives through apologies, forgiveness, and continuous effort to improve |
715 |
| 9 |
Oraoraclinical.com
An industry-leading firm specializing in ophthalmic drug and device development, offering comprehensive services from concept to market approval worldwide |
700 |
| 10 |
TransMedics, Inc.transmedics.com
A leader in portable ex-vivo perfusion of donor organs for transplantation, focused on increasing organ utilization, improving outcomes, and reducing transplant costs |
692 |
| 11 |
Andover Public Schoolsusd385.org
A progressive public school district in Andover, Kansas, focused on academic excellence, helping students succeed, and offering career exploration opportunities |
624 |
| 12 |
Town of Andoverandoverma.gov
A suburban town in Massachusetts with a population of over 33,000 residents, offering quality municipal services, reputable schools, and accessible commuting options |
590 |
| 13 |
Burtons Grill & Barburtonsgrill.com
Burtons serves contemporary American cuisine from scratch with premium ingredients, emphasizing quality, hospitality, accessibility, and safety for guests with allergies |
572 |
| 14 |
Black Diamond Networksblackdiamondnet.com
The company deploys skilled consultants in regulated industries for quality, compliance, and innovation, emphasizing speed, precision, and dynamic solutions |
473 |
| 15 |
NorthBay Solutionsnorthbaysolutions.com
Transforming businesses by unlocking data value in the cloud for agility and innovation with services including migration, development, big data, AI, and staff augmentation |
400 |
| 16 |
ICP Groupicpgroup.com
Supplier of professional building envelope, cementitious, and sports surface products with extensive brand portfolios and specialized training programs. |
390 |
| 17 |
Enel North Americaenelnorthamerica.com
Leading the way in clean energy, transforming energy generation, distribution, and consumption to create a world powered by 100% clean electricity |
377 |
| 18 |
The Andover Companiesandovercompanies.com
Mutual insurance company providing personal and commercial property coverage, committed to protecting policyholders and supporting local independent agents. |
371 |
| 19 |
Minuteman Security & Life Safetyminutemanst.com
Specializing in unified security and safety system solutions for commercial, enterprise, and government clients across various vertical markets |
370 |
| 20 |
Draeger Medical Systems, Inc.draeger.us
A medical devices company in Andover, Massachusetts, specializing in innovative healthcare solutions and technologies for improved patient outcomes |
359 |
| 21 |
Agri-Mark, Inc.agrimark.coop
A dairy cooperative with a rich history, producing award-winning Cabot, McCadam, and Agri-Mark dairy products while supporting New England dairy farm families |
348 |
| 22 |
Samu
Reported as fraudulent, this company's LinkedIn page has been flagged for suspicious activity |
334 |
| 23 |
Physical Sciences Inc.psicorp.com
Innovative technology solutions provider for government and commercial customers, specializing in developing advanced prototypes and transitioning technology from lab to use |
321 |
| 24 |
Spectra-Physicsspectra-physics.com
Provider of lasers for industrial and scientific research applications Delivering disruptive performance and lower cost of ownership to enhance productivity in various markets |
295 |
| 25 |
Casa Systems, Inc.commscope.com
Develops cloud native 5G core and access solutions for cable and mobile service providers, utilizing software platforms for high performance network scale. |
264 |
| 26 |
Covenant Health (MA)covenanthealth.net
A Catholic health care system in New England offering a continuum of high quality care and partnering opportunities for health and elder care organizations |
199 |
| 27 |
Dream Vacationsluxurydreamvacations.net
Travel agency specializing in selling cruise packages and all-inclusive land packages to destinations like Alaska, Hawaii, Mexico, and the Caribbean Specializes in romantic vacations and destination weddings |
177 |
| 28 |
Nextuplenextuple.com
Nextuple Inc specializes in leveling the playing field for Omnichannel retailers by utilizing microservices to enhance fulfillment experiences and accelerate time-to-value |
171 |
| 29 |
QUALITY HOTEL
The company provides unique guest experiences, affordable accommodation, friendly service, and ideal locations across its properties within the group |
168 |
| 30 |
CyberGrants is now Bonterrabonterratech.com
Bonterra is a technology company that provides a cohesive lineup of platforms for social impact, including CyberGrants, EveryAction, GiveGab, and more |
167 |
| 31 |
Physical Optics Corporationmrcy.com
Specialized in (technology) solutions, acquired by another company This page is no longer active |
161 |
| 32 |
Walmart Advanced Systems & Roboticswalmartasr.com
Engineering and technology hub specializing in innovation and automation for Walmart stores, looking for talented team members to join their collaborative culture |
159 |
| 33 |
JVT Advisorsjvtadvisors.com
A Massachusetts-based company with over 25 years of experience offering comprehensive solutions through a vast network of consultants |
156 |
| 34 |
American Training, Inc.americantraininginc.com
Offering housing, education, training, and support services to individuals with disabilities, at-risk youth, and adult learners seeking a more fulfilling life |
155 |
| 35 |
SMA Support Servicessmasupport.us
SMA Support provides tailored virtual assistant and call center solutions for the home services industry, empowering contractors to optimize operations and focus on growth |
152 |
| 36 |
Denplandenplan.co.uk
Leading UK dental payment plan specialist promotes preventive private dental care, serving millions of patients and companies, with B Corp certification |
146 |
| 37 |
Constitution Capital Partnersconcp.com
A leading alternative asset manager in private equity and credit, specializing in disciplined, value-oriented investments with a strong track record |
88 |
| 38 |
Rich Products UKrichs.co.uk
Leading supplier in UK for Out of Home, Grocery, and Foodservice markets Specializing in sweet treats, muffins, cookies, and dairy-free cream toppings Quality products for professionals |
52 |
| 39 |
Andover State Bankgoasb.com
A community-focused bank in Kansas providing personal service, trusted financial solutions, and opportunities for business growth and entrepreneurial success |
30 |
| 40 |
Queensland Bakery Co.queenslandbakery.com
This company manufactures and supplies delicious sweet baked treats for retail, out of home consumption, food service, and wholesale with over 100 years of experience |
25 |
| 41 |
Prestige Touch Limited
The company specializes in sourcing products and brands for mail order fulfillment, offering a wide range of categories including food, cosmetics, gifts, and toys |
9 |
| 42 |
fcgEnergyfcgenergy.com
A management consulting firm with 30+ years in energy and utilities, offering strategic solutions for short-term execution and long-term sustainability |
2 |
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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