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The 59 largest companies in King of Prussia

Tamtam tracks 59 companies headquartered in King of Prussia. This list ranks all of them by number of employees on LinkedIn, led by UHS, The Goddard School and UGI Corporation. Their median headcount is 325. Half of them were founded in 1997 or later.

馃嚭馃嚫 King of Prussia59 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
UHSuhs.com

A leading healthcare provider with a focus on compassionate care, operating hospitals, behavioral health facilities, outpatient facilities, and ambulatory care access points

Hospitals and Health Care 馃嚭馃嚫 King of Prussia 11,329 1979
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

Education Administration Programs 馃嚭馃嚫 King of Prussia 9,847 1988
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

Utilities 馃嚭馃嚫 King of Prussia 5,226 1882
4
Qlikqlik.com

Delivers trusted data products, powerful analytics engines, and AI agents helping teams scale responsibly while reducing risk and maintaining flexible system integration.

Software Development 馃嚭馃嚫 King of Prussia 4,561 1993
5
AmeriGasamerigas.com

Largest retail propane provider in the U.S., serving homes and businesses with a focus on safety, reliability, and responsiveness.

Oil and Gas 馃嚭馃嚫 King of Prussia 3,058 1959
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.

Software Development 馃嚭馃嚫 King of Prussia 2,515 n/a
7
UBCubc.com

Providing biopharma with real-world data and analytics to demonstrate product safety, efficacy, value, and improve patient outcomes.

Biotechnology Research 馃嚭馃嚫 King of Prussia 2,410 2003
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

Hospitals and Health Care 馃嚭馃嚫 King of Prussia 1,715 n/a
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

Environmental Services 馃嚭馃嚫 King of Prussia 1,701 1990
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

Hospitals and Health Care 馃嚭馃嚫 King of Prussia 1,298 1967
11
People2.0people20.com

Specializing in global employer and agent of record services for talent procurement, supporting companies in managing their workforce seamlessly

Human Resources Services 馃嚭馃嚫 King of Prussia 931 n/a
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

Hospitals and Health Care 馃嚭馃嚫 King of Prussia 715 2019
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

Software Development 馃嚭馃嚫 King of Prussia 674 2021
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

Construction 馃嚭馃嚫 King of Prussia 620 1954
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

Law Practice 馃嚭馃嚫 King of Prussia 562 2002
16
ACIqualtekservices.com

ACI provides cable and internet fulfillment services to telecom providers, specializing in installation, maintenance, projects, and upgrades for over 30 years

Telecommunications 馃嚭馃嚫 King of Prussia 497 n/a
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

Telecommunications 馃嚭馃嚫 King of Prussia 488 2007
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

Veterinary 馃嚭馃嚫 King of Prussia 476 2011
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

Retail Office Equipment 馃嚭馃嚫 King of Prussia 465 1997
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

E-Learning Providers 馃嚭馃嚫 King of Prussia 461 2005
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

Mental Health Care 馃嚭馃嚫 King of Prussia 446 2006
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

Insurance 馃嚭馃嚫 King of Prussia 445 1999
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

Wholesale 馃嚭馃嚫 King of Prussia 417 1972
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

Education Administration Programs 馃嚭馃嚫 King of Prussia 414 1988
25
Premier Orthopaedicspremierortho.com

Premier Orthopedics provides top-quality musculoskeletal care in Philadelphia, offering orthopedic surgery, rehabilitation, imaging, pain management, and urgent care services

Medical Practices 馃嚭馃嚫 King of Prussia 413 2000
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.

E-Learning Providers 馃嚭馃嚫 King of Prussia 376 1927
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

Gambling Facilities and Casinos 馃嚭馃嚫 King of Prussia 349 2012
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

Insurance 馃嚭馃嚫 King of Prussia 345 1997
29
CardConnectcardconnect.com

Payment platform offering secure transaction processing and data storage solutions for businesses ranging from Fortune 500 to local shops.

Financial Services 馃嚭馃嚫 King of Prussia 328 2006
30
PetroChoice - Lubrication Solutionsmoovelube.com

Innovative lubricant distributor specializing in proactive solutions to lower costs and enhance safety, savings, and sustainability for businesses

Oil and Gas 馃嚭馃嚫 King of Prussia 325 1969
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

Executive Search Services 馃嚭馃嚫 King of Prussia 323 1980
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

IT Services and IT Consulting 馃嚭馃嚫 King of Prussia 307 2015
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

Software Development 馃嚭馃嚫 King of Prussia 239 1988
34
Evolve IPevolveip.net

It partners with IT professionals to provide secure cloud-based solutions that enhance productivity and communication for the hybrid workforce.

IT Services and IT Consulting 馃嚭馃嚫 King of Prussia 225 2007
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

Machinery Manufacturing 馃嚭馃嚫 King of Prussia 209 n/a
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

Staffing and Recruiting 馃嚭馃嚫 King of Prussia 193 1987
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

Real Estate 馃嚭馃嚫 King of Prussia 182 1965
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

Construction 馃嚭馃嚫 King of Prussia 173 n/a
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

Religious Institutions 馃嚭馃嚫 King of Prussia 173 n/a
40
ExecuPOWER LLCexecupower.com

A certified women-owned consulting firm offering engineering design, project, and construction management services to the power industry

Utilities 馃嚭馃嚫 King of Prussia 165 2016
41
Relevanterelevante.com

An innovative recruiting, staffing, and consulting organization that helps clients find top talent and candidates secure rewarding careers through tailored solutions

Human Resources Services 馃嚭馃嚫 King of Prussia 161 2002
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

Biotechnology Research 馃嚭馃嚫 King of Prussia 160 2000
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

Food and Beverage Services 馃嚭馃嚫 King of Prussia 151 1997
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

Financial Services 馃嚭馃嚫 King of Prussia 135 n/a
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

IT Services and IT Consulting 馃嚭馃嚫 King of Prussia 111 2001
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.

Biotechnology Research 馃嚭馃嚫 King of Prussia 70 2020
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

Financial Services 馃嚭馃嚫 King of Prussia 44 n/a
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

Insurance 馃嚭馃嚫 King of Prussia 31 1990
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

Retail 馃嚭馃嚫 King of Prussia 26 n/a
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

Financial Services 馃嚭馃嚫 King of Prussia 20 n/a
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

IT Services and IT Consulting 馃嚭馃嚫 King of Prussia 16 2006
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

Industrial Machinery Manufacturing 馃嚭馃嚫 King of Prussia 14 1560
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

Financial Services 馃嚭馃嚫 King of Prussia 11 1983
54
Reliant

An early-stage private equity investment fund specializing in funding and supporting innovative businesses with growth potential

Venture Capital and Private Equity Principals 馃嚭馃嚫 King of Prussia 9 2022
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

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 King of Prussia 7 1991
56
Vitaeris Inc.csl.com

The company is now part of CSL Behring, indicating a merger or acquisition

Pharmaceutical Manufacturing 馃嚭馃嚫 King of Prussia 4 n/a
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

Insurance 馃嚭馃嚫 King of Prussia 4 1984
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

Computer and Network Security 馃嚭馃嚫 King of Prussia 2 1998
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

Venture Capital and Private Equity Principals 馃嚭馃嚫 King of Prussia 2 2018

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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