| # | Company | Employees |
|---|---|---|
| 1 |
Unisysunisys.com
A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations |
23,358 |
| 2 |
BrightView Landscapesbrightview.com
A leading provider of high-quality landscape and snow services, offering worry-free solutions to clients nationwide through a dedicated team |
5,514 |
| 3 |
IPS-Integrated Project Servicesipsdb.com
Technical consulting, architecture, engineering, procurement, and construction management for complex facilities through commissioning, validation, and compliance services to accelerate operational readiness and market speed. |
3,932 |
| 4 |
Griswoldgriswoldcare.com
A top home care provider with 170 locations in 31 states, offering professional caregivers and services to help adults maintain quality of life |
2,094 |
| 5 |
Signant Healthsignanthealth.com
Providing comprehensive eClinical solutions and scientific expertise to support clinical trials, regulatory success, and meaningful patient engagement worldwide. |
2,037 |
| 6 |
Henkels & McCoy, Inc.henkels.com
A leading utility construction firm providing critical infrastructure for various markets throughout North America, emphasizing safety, diversity, and community impact |
1,955 |
| 7 |
Montgomery County Community Collegemc3.edu
Providing over 100 associate degrees, certificates, workforce training, and flexible learning options across campuses and online for diverse students. |
1,544 |
| 8 |
GHR Healthcareghrhealthcare.com
GHR Healthcare is a partner in healthcare staffing, matching professionals with facilities through industry expertise, tech solutions, and personalized support |
1,500 |
| 9 |
PMA Companiespmacompanies.com
Risk management solutions and services company specializing in workers' compensation, property & casualty insurance in the United States with high client retention and satisfaction rates |
1,446 |
| 10 |
Health Advocatehealthadvocate.com
Personalized, expert healthcare support available 24/7, in multiple languages, focusing on improving health outcomes, reducing costs, and providing peace of mind |
1,170 |
| 11 |
QualTekqualtekservices.com
QualTek provides innovative turnkey infrastructure services for the telecom and power industries, specializing in engineering, installation, program management, and disaster recovery |
1,081 |
| 12 |
Ramp Healthramphealth.com
An established risk mitigation employee engagement company using high-tech, high-touch solutions to reduce health-related risks and associated costs for employers |
867 |
| 13 |
KenCrestkencrest.org
Established in 1905, this company provides community-based supports for individuals with intellectual or developmental disabilities and autism across multiple states They offer various services including early intervention, community living, and employment support |
792 |
| 14 |
AVASOFTavasoft.com
A leading digital transformation strategy company with AI-powered implementation methodology, serving clients worldwide with a holistic approach to technology platforms |
775 |
| 15 |
Wellness Coachesramphealth.com
Provider of clinical, wellbeing, and safety solutions delivering high-quality healthcare services, engagement, risk reduction, and cost savings through customizable offerings nationwide |
590 |
| 16 |
Emerson Rogersemersonrogers.com
A wholesale General Agent providing innovative programs, support, and tools to help brokers differentiate themselves and expand their business |
578 |
| 17 |
AllianceOneallianceoneinc.com
The company offers collection and contact center solutions tailored to clients' needs, with a focus on compliance, consumer communication, and conflict resolution |
465 |
| 18 |
The Columbus Organizationjobs.jobvite.com
The organization provides care coordination, professional clinical staffing, and quality improvement services for individuals with intellectual/developmental disabilities and behavioral needs |
430 |
| 19 |
Slipstream Life Sciencesslipstreamls.com
Specializing in IT outsourcing and managed solutions for the life sciences industry, our strategic consulting services support the advancement of life-saving medicines and technologies |
334 |
| 20 |
Canada Life Reinsurancecanadalifere.com
Providing tailored reinsurance solutions focused on longevity, structured, and non-life risks to support insurers' risk management and capital optimization. |
331 |
| 21 |
KARYA Technologieskaryatech.com
The company provides global enterprise solutions, IT consulting, solution design & delivery, and operations support services to help businesses thrive |
258 |
| 22 |
Symphony Healthiconplc.com
Provider of data, analytics, technology solutions, and insights for healthcare industry players, helping drive revenue growth and commercial effectiveness in evolving healthcare ecosystem |
221 |
| 23 |
Peirce Phelpspeirce.com
Innovative solutions for consumer electronics, appliances, HVAC products, and more Growing distributor with deep industry knowledge and commitment to customer success |
220 |
| 24 |
ICON Government and Public Health Solutionsiconplc.com
Provides clinical development and staffing services to US Government agencies, multinational public health organizations, and global NGOs in various disease areas. |
180 |
| 25 |
Gen3 Marketinggen3marketing.com
Global performance marketing agency specializing in affiliate marketing, with expertise in full-funnel programs to drive customer acquisition and revenue growth worldwide |
179 |
| 26 |
CompuGaincompugain.com
Specializing in rapid and agile cloud migration, application modernization, and data value realization through a partnership with Unisys since December 2021 |
176 |
| 27 |
CCI Consulting - A Keystone Partners Companycareerminds.com
A trusted Talent Management and HR Consulting firm, providing integrated solutions to attract, develop, and retain talent for sustainable business success |
174 |
| 28 |
NHS Management Servicesnhsonline.org
Providing comprehensive resources for professional development, event hosting, human services training, and consulting for companies and organizations with a focus on personal development |
170 |
| 29 |
MasTec Professional Servicesmastecprofessionalservices.com
The company is a top engineering and construction firm, offering infrastructure solutions to enhance project approaches and promote growth through technology, process, labor, training, and cost efficiency |
167 |
| 30 |
Formely Corporate Call Center, Inc, now The Results Companiescorporatecallcenter.com
A US-based teleservice outsourcing provider offering inbound and outbound services nationwide, known for its dedicated professionals, advanced technology, and customized project management |
154 |
| 31 |
Abramson Senior Careabramsonseniorcare.org
A nonsectarian senior care provider in Philadelphia offering a range of services including in-home care, medical rehabilitation, hospice, and more |
148 |
| 32 |
SkySwitchskyswitch.com
The company provides a white-label UCaaS reseller platform for MSPs, VARs, and agents to offer cloud-based voice solutions to customers |
110 |
| 33 |
CLX LogisticsCLXLogistics.com
A global leader in chemical supply chain solutions, providing comprehensive logistics management, technology, and consulting services to solve vital challenges for customers |
110 |
| 34 |
Hansen Properties Inc.normandyfarm.com
Hospitality company owning two connected landmark destinations offering fine dining, event spaces, golf, accommodations, and recreational amenities on 210 acres |
93 |
| 35 |
Independence Planning Groupipgroup.info
Financial services firm offering comprehensive strategies for asset optimization, protection, and cash flow, supported by dedicated representatives focusing on long-term financial success |
66 |
| 36 |
Henkels & McCoy Group, Inc.henkelsgroup.com
A leading utility construction firm providing critical infrastructure for power, oil & gas, gas distribution, and communications markets throughout North America |
52 |
| 37 |
Interphase Systems, a Magna5 Companymagna5.com
A technology management and consulting organization offering IT solutions for various industries, specializing in cloud migration, IT security, and managed IT services |
10 |
| 38 |
Agile Risk Managementtechriskmgmt.com
The company specializes in offering expert risk management services with a focus on providing value and superior customer service |
2 |
| 39 |
Bell Curve Capital LPbellcurvecapital.com
An institutional proprietary trading firm specializing in systematic trading programs and quantitative strategies, providing liquidity in equity derivatives with proprietary research and technology |
1 |
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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