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The 42 largest companies in Andover

Tamtam tracks 42 companies headquartered in Andover. This list ranks all of them by number of employees on LinkedIn, led by MKS Inc., Mercury Systems and ALKU. Their median headcount is 348. Half of them were founded in 1997 or later.

馃嚭馃嚫 Andover42 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
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
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

Defense and Space Manufacturing 馃嚭馃嚫 Andover 2,300 1981
3
ALKUalku.com

Specialized consulting firm deploying skilled resources in Technologies, HCIT, Life Sciences, and Government Programs Emphasis on efficiency, accuracy, recruitment, and employee success

Staffing and Recruiting 馃嚭馃嚫 Andover 1,321 2008
4
Vicorvicorpower.com

Designs and manufactures modular power components and complete power systems for computing, industrial, telecom, transportation, aerospace, and defense markets.

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Andover 998 1981
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

IT Services and IT Consulting 馃嚭馃嚫 Andover 952 n/a
6
Phillips Academyandover.edu

Coeducational independent high school with rigorous academic programs, diverse community, serving approximately 1,100 students since 1778.

Primary and Secondary Education 馃嚭馃嚫 Andover 810 1778
7
Aras Corporationaras.com

Provider of product lifecycle management and digital thread solutions enabling flexible, rapid delivery of connected product data and processes.

Software Development 馃嚭馃嚫 Andover 788 2000
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

Religious Institutions 馃嚭馃嚫 Andover 715 1967
9
Oraoraclinical.com

An industry-leading firm specializing in ophthalmic drug and device development, offering comprehensive services from concept to market approval worldwide

Pharmaceutical Manufacturing 馃嚭馃嚫 Andover 700 1977
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

Medical Equipment Manufacturing 馃嚭馃嚫 Andover 692 1998
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

Education Administration Programs 馃嚭馃嚫 Andover 624 n/a
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

Government Administration 馃嚭馃嚫 Andover 590 1646
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

Restaurants 馃嚭馃嚫 Andover 572 2005
14
Black Diamond Networksblackdiamondnet.com

The company deploys skilled consultants in regulated industries for quality, compliance, and innovation, emphasizing speed, precision, and dynamic solutions

Staffing and Recruiting 馃嚭馃嚫 Andover 473 1999
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

IT Services and IT Consulting 馃嚭馃嚫 Andover 400 2007
16
ICP Groupicpgroup.com

Supplier of professional building envelope, cementitious, and sports surface products with extensive brand portfolios and specialized training programs.

Wholesale Building Materials 馃嚭馃嚫 Andover 390 2016
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

Renewables & Environment 馃嚭馃嚫 Andover 377 2000
18
The Andover Companiesandovercompanies.com

Mutual insurance company providing personal and commercial property coverage, committed to protecting policyholders and supporting local independent agents.

Insurance 馃嚭馃嚫 Andover 371 1828
19
Minuteman Security & Life Safetyminutemanst.com

Specializing in unified security and safety system solutions for commercial, enterprise, and government clients across various vertical markets

Security and Investigations 馃嚭馃嚫 Andover 370 1988
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

Medical Equipment Manufacturing 馃嚭馃嚫 Andover 359 2003
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

Dairy 馃嚭馃嚫 Andover 348 1919
22
Samu

Reported as fraudulent, this company's LinkedIn page has been flagged for suspicious activity

Design Services 馃嚭馃嚫 Andover 334 n/a
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

Research Services 馃嚭馃嚫 Andover 321 1973
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

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Andover 295 1961
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.

Telecommunications 馃嚭馃嚫 Andover 264 2003
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

Hospitals and Health Care 馃嚭馃嚫 Andover 199 1983
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

Travel Arrangements 馃嚭馃嚫 Andover 177 2007
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

IT Services and IT Consulting 馃嚭馃嚫 Andover 171 2017
29
QUALITY HOTEL

The company provides unique guest experiences, affordable accommodation, friendly service, and ideal locations across its properties within the group

Hospitality 馃嚭馃嚫 Andover 168 n/a
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

IT Services and IT Consulting 馃嚭馃嚫 Andover 167 n/a
31
Physical Optics Corporationmrcy.com

Specialized in (technology) solutions, acquired by another company This page is no longer active

Defense and Space Manufacturing 馃嚭馃嚫 Andover 161 1981
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

Robotics Engineering 馃嚭馃嚫 Andover 159 n/a
33
JVT Advisorsjvtadvisors.com

A Massachusetts-based company with over 25 years of experience offering comprehensive solutions through a vast network of consultants

Staffing and Recruiting 馃嚭馃嚫 Andover 156 1997
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

Individual and Family Services 馃嚭馃嚫 Andover 155 1979
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

Outsourcing and Offshoring Consulting 馃嚭馃嚫 Andover 152 2019
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

Financial Services 馃嚭馃嚫 Andover 146 n/a
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

Investment Management 馃嚭馃嚫 Andover 88 2008
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

Food and Beverage Manufacturing 馃嚭馃嚫 Andover 52 n/a
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

Banking 馃嚭馃嚫 Andover 30 1916
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

Food and Beverage Services 馃嚭馃嚫 Andover 25 1890
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

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Andover 9 2007
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

Business Consulting and Services 馃嚭馃嚫 Andover 2 2010

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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