| # | Company | Employees |
|---|---|---|
| 1 | 11,329 | |
| 2 |
The Goddard Schoolgoddardschool.com
An educational organization that promotes fun learning through academically endorsed methods to prepare children for long-term success in school and life |
9,847 |
| 3 |
UGI Corporationugicorp.com
An international energy distribution and services company focusing on delivering energy products, providing great service, serving communities, and delivering value to investors |
5,226 |
| 4 | 4,561 | |
| 5 |
AmeriGasamerigas.com
Largest retail propane provider in the U.S., serving homes and businesses with a focus on safety, reliability, and responsiveness. |
3,058 |
| 6 |
Vertex Inc.vertexinc.com
Provides comprehensive tax solutions and software, helping global businesses manage indirect tax obligations, compliance, and growth across various business systems and jurisdictions. |
2,515 |
| 7 | 2,410 | |
| 8 |
Select Physical Therapyselectphysicaltherapy.com
Nationally recognized provider of outpatient physical rehabilitation services, including therapy for sports injuries, work-related injuries, and general physical therapy |
1,715 |
| 9 |
Clean Earthcleanearthinc.com
Leading provider of environmental and regulated waste management services, offering tailored solutions for recycling, repurposing, and safely disposing of difficult wastes Promotes sustainability |
1,701 |
| 10 |
ImageFIRSTimagefirst.com
National linen rental and laundry service specializing in healthcare, providing patient gowns, scrubs, and linen inventory management to medical facilities for improved patient satisfaction |
1,298 |
| 11 |
People2.0people20.com
Specializing in global employer and agent of record services for talent procurement, supporting companies in managing their workforce seamlessly |
931 |
| 12 |
Helping Hands Family - Autism Serviceshhfamily.com
Provider of Applied Behavior Analysis therapy in multiple states, offering individualized treatment plans to support children with autism in various settings |
715 |
| 13 |
NexTurnnexturn.com
Next-generation engineering services firm specializing in cloud native solutions, accelerating clients' digital transformation journey through architecture, development, deployment, and operation of modern applications |
674 |
| 14 |
InfraSource, A Quanta Services Companyinfrasourceus.com
A leading provider of infrastructure services for natural gas, oil, telecom, and electric power industries, delivering innovative and efficient construction solutions with a focus on safety and quality |
620 |
| 15 |
Chartwell Lawchartwelllaw.com
A multidisciplinary law firm with 29 offices across the US offering legal services including general liability defense, insurance coverage analysis, and commercial litigation |
562 |
| 16 |
ACIqualtekservices.com
ACI provides cable and internet fulfillment services to telecom providers, specializing in installation, maintenance, projects, and upgrades for over 30 years |
497 |
| 17 |
QuadGenquadgen.com
QuadGen is a network and engineering services company specializing in telecommunications solutions, small cell/DAS, RF design, backhaul/core network engineering, and RAN integration/commissioning |
488 |
| 18 |
Veterinary Practice Partnersvetpartners.com
Veterinary Practice Partners is a trusted business partner to veterinarians, co-owning practices to grow and manage while preserving their unique identity and culture |
476 |
| 19 |
Quench USA, Inc.quench.culligan.com
Providing water-as-a-service solutions with point-of-use machines offering various water options to keep employees, customers, and guests happy and hydrated |
465 |
| 20 |
Agora Cyber Charter Schoolagora.org
Agora offers K-12 students personalized virtual education with state-certified teachers to prepare them academically and socially for success |
461 |
| 21 |
Behavior Interventions, Inc.behaviorinterventions.org
A company founded in 2006 by Board Certified Behavior Analysts, providing quality Applied Behavior Analysis (ABA) Services to families and schools |
446 |
| 22 |
Marsh McLennan Agency - EastMMAEast.com
Provide business insurance, employee benefits, retirement, and private client solutions with a personalized approach blending local service with global expertise and resources |
445 |
| 23 |
Colonial Electric Supplycolonialelectricsupply.com
The company distributes electrical products, industrial supplies, and lighting, with divisions specializing in major projects, telecom, solutions, and retail lighting showrooms |
417 |
| 24 |
Goddard Systems, Inc.goddardschoolfranchise.com
Leading premium childcare franchisor offering academically endorsed education programs for children, supporting families and individual talents with over 580 franchise locations nationwide |
414 |
| 25 |
Premier Orthopaedicspremierortho.com
Premier Orthopedics provides top-quality musculoskeletal care in Philadelphia, offering orthopedic surgery, rehabilitation, imaging, pain management, and urgent care services |
413 |
| 26 |
The American College of Financial Servicestheamericancollege.edu
Educates financial services professionals. Provides certificates, designations, continuing education, and graduate degrees. Also offers consumer financial education programs. |
376 |
| 27 |
Valley Forge Casino Resortvfcasino.boydgaming.com
The company is a full-amenity gaming resort located near Philadelphia, offering gaming, live entertainment, dining options, nightlife experiences, accommodations, and meeting facilities |
349 |
| 28 |
GeoBluebcbsglobalsolutions.com
Specializing in international healthcare for globally mobile individuals, offering global medical networks, digital tools, and 24/7 medical assistance for short and long-term assignments |
345 |
| 29 |
CardConnectcardconnect.com
Payment platform offering secure transaction processing and data storage solutions for businesses ranging from Fortune 500 to local shops. |
328 |
| 30 |
PetroChoice - Lubrication Solutionsmoovelube.com
Innovative lubricant distributor specializing in proactive solutions to lower costs and enhance safety, savings, and sustainability for businesses |
325 |
| 31 |
JM Searchjmsearch.com
A leading retained executive search firm specializing in private equity and growth-oriented organizations, offering expertise, personalized service, and professional networks |
323 |
| 32 |
Mahathimahathiinfotech.com
A technology solutions specialist in P&C Insurance and LegalTech, offering niche services like Guidewire implementation, RPA solutions, BI & data management, and cloud application services globally |
307 |
| 33 |
Medecisionmedecision.com
A digital care management company providing solutions to health plans and care delivery organizations, connecting the healthcare ecosystem for better consumer engagement |
239 |
| 34 |
Evolve IPevolveip.net
It partners with IT professionals to provide secure cloud-based solutions that enhance productivity and communication for the hybrid workforce. |
225 |
| 35 |
Philadelphia Gear, Power Systems by Timkenphilagear.com
The company specializes in designing and manufacturing high-quality enclosed drives for various industrial applications, offering innovative solutions to prevent downtime |
209 |
| 36 |
Robinson Grouprobinsongroup.com
A leading talent access firm specializing in IT, digital, sales, marketing, finance, and more, with a focus on diversity and inclusion |
193 |
| 37 |
The Westover Companieswestovercompanies.com
A company providing quality apartment living, commercial, and retail spaces with a focus on customer satisfaction in various locations for over 50 years |
182 |
| 38 |
NX Utilitiesqualtekservices.com
This company specializes in outside plant program management, telecom and utility services, focusing on high quality, value-driven solutions, and employee training and accountability |
173 |
| 39 |
American Baptist Churches USAabc-usa.org
A denomination of missional congregations nurturing disciples to live for the healing of the world and supporting American Baptists nationwide |
173 |
| 40 |
ExecuPOWER LLCexecupower.com
A certified women-owned consulting firm offering engineering design, project, and construction management services to the power industry |
165 |
| 41 |
Relevanterelevante.com
An innovative recruiting, staffing, and consulting organization that helps clients find top talent and candidates secure rewarding careers through tailored solutions |
161 |
| 42 |
TechData Service Company, LLCtechdataservice.com
Provider of IT and data science professionals specializing in pharmaceutical research industries, offering technology solutions to maximize cost savings and productivity |
160 |
| 43 |
Waterlogic USAquenchwater.com
Provider of water-as-a-service solutions, offering pure drinking water through bottle-free machines with various consumption choices to keep customers hydrated and satisfied |
151 |
| 44 |
RDC - A Moody's Companymoodys.com
Utilizing AI technology, open-source data, and human intervention, the company provides trusted risk intelligence for AML, CDD, vendor screening, anti-corruption, and risk management programs |
135 |
| 45 |
AccessIT Groupaccessitgroup.com
Specialized cybersecurity solutions provider with over 20 years of experience, offering advanced security services focusing on cloud, risk management, compliance, and implementation |
111 |
| 46 |
Center for Breakthrough Medicinesbreakthroughmedicines.com
Provides integrated contract development and manufacturing for cell and gene therapies, offering a one-source solution for advanced therapies. |
70 |
| 47 |
Independence Square Advisorsindsquare.com
Independent wealth management consulting firm supporting individual investors, business owners, and financial advisors nationwide with private wealth management, retirement plan consulting, and insurance protection |
44 |
| 48 |
The Addis Group, LLC.theaddisgroup.com
A leading risk management consultancy and insurance broker in the US, with a focus on client retention, staff quality, community involvement, and carrier relationships |
31 |
| 49 |
EBAY ENTERPRISE, INC
A company specializing in the development of e-commerce technologies and platforms to enhance online shopping experiences for businesses and consumers |
26 |
| 50 |
Ethos Financial Group, LLCethosfg.com
Investment management and financial planning firm dedicated to serving individuals, families, and institutional investors with tailored strategies for achieving financial goals |
20 |
| 51 |
KLX Cloud IT Private Limitedknitlogix.com
Global IT services provider specializing in Cloud Transformations, Enterprise Content Management, ERP, Cloud Data Security, Data Destruction, IT infrastructure, and Engineering Design solutions |
16 |
| 52 |
NBK America LLCnbk1560.com
A company with over 460 years of history in Japan, specializing in high-precision machinery products tailored for various industries in North America |
14 |
| 53 |
Associated Benefit Planners, Ltd.abp-ltd.com
An independent Third Party Administrator providing consulting and administration services for various retirement plans with a focus on quality and industry best practices |
11 |
| 54 |
Reliant
An early-stage private equity investment fund specializing in funding and supporting innovative businesses with growth potential |
9 |
| 55 |
Pergamon Corp.pergamon-corp.com
Provider of Electronics Manufacturing Services for medical, industrial, life sciences, and high-end consumer products Specializing in manufacturing, engineering, assembly, and supply chain management services |
7 |
| 56 | 4 | |
| 57 |
Roller Consulting Company, an Acrisure LLC partner firmacrisure.com
An insurance brokerage firm providing personalized services in health, wellness, retirement, executive benefits, and compliance for companies of all sizes |
4 |
| 58 |
SRMS Network Technologiessrmstechnologies.com
A national computer services provider specializing in secure, reliable, and managed IT solutions Committed to customer service and industry leadership |
2 |
| 59 |
Reliant Group of Companiesreliant-grp.com
An early stage Venture Capital Firm supporting start-ups and early to mid-stage companies in high growth, under serviced sectors with expert guidance and equity partnerships |
2 |
Turn this list into pipeline
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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