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The 78 largest companies in Naperville

Tamtam tracks 78 companies headquartered in Naperville. This list ranks all of them by number of employees on LinkedIn, led by Nalco Water, An Ecolab Company, KeHE Distributors and Edward Hospital. Their median headcount is 156. Half of them were founded in 2002 or later.

馃嚭馃嚫 Naperville78 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Nalco Water, An Ecolab Companyecolab.com

A global leader in water and process management solutions, leveraging connected chemistry and digital innovation to optimize sustainability and business outcomes

Chemical Manufacturing 馃嚭馃嚫 Naperville 12,751 n/a
2
KeHE Distributorskehe.com

A mission-driven distributor of natural, organic, specialty, and fresh products with a large employee-owner network across North America

Food and Beverage Manufacturing 馃嚭馃嚫 Naperville 4,529 1953
3
Edward Hospitalendeavorhealth.org

United healthcare system focused on personal patient experiences, convenient access to world-class care, serving communities with hospitals and clinics.

Hospitals and Health Care 馃嚭馃嚫 Naperville 4,168 n/a
4
Egenegen.ai

A merged company combining platform engineering with data, AI, analytics, and cloud expertise to empower organizations in their digital journeys

IT Services and IT Consulting 馃嚭馃嚫 Naperville 3,096 2000
5
Nicor Gasnicorgas.com

Leading natural gas distribution company in Illinois, ensuring safe and reliable gas delivery to over 22 million homes and businesses Committed to community, safety, and environmental stewardship

Utilities 馃嚭馃嚫 Naperville 1,521 n/a
6
Royal Cyber Inc.royalcyber.com

Empowering enterprises to evolve with agility, security, and innovation through digital transformation and modernization of legacy systems with AI-driven solutions.

IT Services and IT Consulting 馃嚭馃嚫 Naperville 1,383 2002
7
Naperville Community Unit School District 203naperville203.org

The company focuses on educating students to be self-directed learners, collaborative workers, complex thinkers, quality producers, and community contributors

Education Administration Programs 馃嚭馃嚫 Naperville 1,379 1972
8
North Central Collegenorthcentralcollege.edu

A college in Illinois offering a wide range of undergraduate and graduate programs, known for its top-notch facilities and programs

Higher Education 馃嚭馃嚫 Naperville 1,374 1861
9
Five-Star AudioVisualfive-starav.com

Luxury audiovisual solutions provider for the hospitality industry, specializing in innovative technology, high service standards, and immersive experiences

Events Services 馃嚭馃嚫 Naperville 1,318 1995
10
Eby-Brown Company, LLCeby-brown.com

Leading convenience store supplier delivering innovative foodservice, merchandising, technology, and insight to 10,000+ C-store retailers across North America as part of PFG family

Wholesale 馃嚭馃嚫 Naperville 1,093 1897
11
Impact Advisorsimpact-advisors.com

Healthcare management consulting firm solving industry challenges with team of experts, quality solutions, and measurable value Award-winning and innovative culture

Hospitals and Health Care 馃嚭馃嚫 Naperville 927 2007
12
Bella Baby Photographybellababyphotography.com

Professional photographers capture natural, artistic moments of newborns and families in hospitals, using natural light and a photojournalistic style approach

Photography 馃嚭馃嚫 Naperville 669 2007
13
City of Napervillenaperville.il.us

The company is located in Naperville, offering a variety of amenities such as top schools, a great library system, parks, and healthcare providers in a low-crime environment

Government Administration 馃嚭馃嚫 Naperville 616 1831
14
Cultivate Behavioral Health & Educationcultivatebhe.com

Utilizing evidence-based strategies, Cultivate provides engaging and dynamic Applied Behavior Analysis services tailored to each child for meaningful change

Mental Health Care 馃嚭馃嚫 Naperville 615 2015
15
CoreFlex Solutions Inc.coreflexsolutions.com

The company specializes in digital transformation services, utilizing Salesforce, software engineering, cloud, mobility, AI/ML, IoT, data analytics, and end-to-end managed services for various industries

IT Services and IT Consulting 馃嚭馃嚫 Naperville 537 2013
16
Wilton Brandswilton.com

Innovative company passionate about baking and decorating, delivering products and ideas that evolve with trends, backed by a multi-billion-dollar, family-owned parent company

Consumer Goods 馃嚭馃嚫 Naperville 528 1929
17
Calamos Investmentscalamos.com

Diversified global asset and wealth management firm offering innovative investment strategies across multiple asset classes and client types.

Financial Services 馃嚭馃嚫 Naperville 475 1977
18
Sourcebookssourcebooks.com

Independent, women-led publisher since 1987 changing lives through wide range of genres, committed to driving results and creating a vibrant future for books

Book and Periodical Publishing 馃嚭馃嚫 Naperville 474 1987
19
Oncourse Home Solutionsoncoursehome.com

A company offering affordable protection for service line problems, managing over 17 million contracts nationwide with hassle-free repairs and exceptional customer service

Consumer Services 馃嚭馃嚫 Naperville 449 1992
20
General Employment Enterprisesgeegroupcareers.com

Specialized staffing solutions provider offering professional staffing in IT, engineering, finance, and healthcare sectors, as well as light industrial staffing services

Staffing and Recruiting 馃嚭馃嚫 Naperville 375 1893
21
Doctors of Physical Therapydoctorsofphysicaltherapy.com

A therapist-owned company providing high-quality care with doctorate-level therapists for continuity, quality, and evidence-based treatment, including on-site rehab clinics

Hospitals and Health Care 馃嚭馃嚫 Naperville 373 2005
22
Calvary Church of Napervillecalvarynaperville.org

A multi-cultural church providing a space to discover and apply Biblical truths, connect with others, and experience life with Jesus Christ

Religious Institutions 馃嚭馃嚫 Naperville 347 1967
23
Endeavor Health Behavioral Healtheehealth.org

Behavioral health services offering inpatient and outpatient care, medication management, therapy, and treatment for various disorders such as anxiety, depression, and eating disorders

Hospitals and Health Care 馃嚭馃嚫 Naperville 339 1990
24
Profood International Incprofoodinternational.com

A food additive distributor offering high-quality products like vitamins, organic acids, preservatives, amino acids, enzymes, prebiotics, sweeteners, proteins, dietary fibers, and more Operating in US and Asia

Food and Beverage Services 馃嚭馃嚫 Naperville 339 1998
25
Stiversstivers.com

Staffing and recruiting specializing in office, professional, supply chain, and retail merchandising positions, creating relationships through personalized approaches since 1945

Staffing and Recruiting 馃嚭馃嚫 Naperville 337 n/a
26
Chervon North America, Incglobal.chervongroup.com

Global provider in power tools and outdoor equipment industries, focusing on innovation and collaboration across manufacturing, design, and sales offices worldwide

Manufacturing 馃嚭馃嚫 Naperville 322 n/a
27
Naperville Park Districtnapervilleparks.org

Established in 1966, this independent municipal agency manages over 2,500 acres with 150+ parks and facilities, offering 900+ recreational programs and events annually

Government Administration 馃嚭馃嚫 Naperville 311 1966
28
Dealer Inspiredealerinspire.com

A leading automotive platform provider focused on developing innovative technologies for dealers and consumers, promoting collaboration and giving back to communities

IT Services and IT Consulting 馃嚭馃嚫 Naperville 302 2013
29
Evolutyz Corpevolutyz.com

An award-winning IT consulting firm providing custom technical solutions to transform businesses and empower IT experts to reach their full potential

IT Services and IT Consulting 馃嚭馃嚫 Naperville 194 2011
30
Illinois Health and Hospital Associationteam-iha.org

Advocating for Illinois hospitals and health systems to provide high-quality healthcare access and services for all communities across the state

Hospitals and Health Care 馃嚭馃嚫 Naperville 193 1923
31
Agami Technologiesagamitechnologies.com

A software development organization focusing on desktop, web, and mobile applications, cloud computing, and equality with a diverse team

IT Services and IT Consulting 馃嚭馃嚫 Naperville 180 2011
32
Viantviant.com

Healthcare payment solutions company offering primary and supplemental networks, contract management, cost containment strategies, and post payment recovery services for providers, payers, and patients

Insurance 馃嚭馃嚫 Naperville 175 1951
33
Contruentcontruent.com

Premier capital project management software empowering owners and EPCs to build construction projects faster with integrated cost and scheduling solutions

Software Development 馃嚭馃嚫 Naperville 174 1995
34
Infogix, Inc. (now Precisely)precisely.com

This company offers data integrity software to ensure accurate and reliable data, enabling informed business decisions and digital transformation

IT Services and IT Consulting 馃嚭馃嚫 Naperville 173 1968
35
ennVee TechnoGroup Incennvee.com

A leading IT solution provider offering performance management tools and services for Oracle, SAP, NetSuite, automation, digital transformation, and cloud infrastructure

IT Services and IT Consulting 馃嚭馃嚫 Naperville 169 2000
36
Neuqua Valley High Schoolipsd.org

Comprehensive four-year high school in Indian Prairie School District #204, established in 1997 with first graduation class in 2000

Primary and Secondary Education 馃嚭馃嚫 Naperville 162 1997
37
INSTEC (an Insurity company)insurity.com

A leading provider of property and casualty insurance software and data analytics, serving top insurers, brokers, and MGAs worldwide Delivering simplified insurance experiences

Software Development 馃嚭馃嚫 Naperville 162 n/a
38
Meadowbrook Rehabilitationmeadowbrookrehabilitation.com

Skilled nursing facilities in Chicagoland, Illinois providing person-centered care, customized healthcare plans, and a range of in-house care services for residents

Nursing Homes and Residential Care Facilities 馃嚭馃嚫 Naperville 158 n/a
39
Libsys Inclibsysinc.com

A Chicago-based technology-focused organization specializing in delivering end-to-end IT solutions with a customer-centric approach, leveraging internet technologies for business competitiveness

IT Services and IT Consulting 馃嚭馃嚫 Naperville 156 2002
40
DHJJ Certified Public Accountants and Business Advisorsdhjj.com

A multifaceted business advisory firm in Chicagoland with over 100 associates offering CPA, tax, assurance services, specialty services, and financial advisory

Accounting 馃嚭馃嚫 Naperville 153 1974
41
ampliFI Loyalty Solutionsamplifiloyalty.com

Industry-leading provider of custom loyalty and engagement programs for financial institutions, offering data-driven rewards, real-time rewards, unique earning opportunities, and dedicated support

Financial Services 馃嚭馃嚫 Naperville 152 n/a
42
Naperville Public Librarynaperville-lib.org

A community-focused public library in Naperville, serving residents with three facilities, receiving high ratings and recognition for excellence in service

Libraries 馃嚭馃嚫 Naperville 151 1898
43
Charles Rutenberg Realty of Illinoismycrr.com

The company focuses on empowering real estate agents by allowing them to retain majority of their commissions and providing necessary support

Real Estate 馃嚭馃嚫 Naperville 150 2004
44
Monarch Landingwelcometomonarchlanding.com

Senior living community offering a variety of career opportunities in healthcare, activities, management, and more Committed to providing quality care and benefits to employees

Hospitals and Health Care 馃嚭馃嚫 Naperville 147 2006
45
Delta Dental of Illinoisdeltadentalil.com

A trusted partner in dental benefits, promoting overall health and well-being through customer-focused products, cost-saving strategies, and community health programs

Insurance 馃嚭馃嚫 Naperville 142 1967
46
Sound Incorporatedsoundinc.com

A technology solutions provider specializing in critical communications, healthcare solutions, security, network solutions, AV systems, and professional services for various industries

IT Services and IT Consulting 馃嚭馃嚫 Naperville 89 1963
47
Calamos Wealth Managementwm.calamos.com

Wealth management firm providing comprehensive financial planning, investment management, estate and tax planning, and business transition services to individuals, families, and foundations

Financial Services 馃嚭馃嚫 Naperville 62 2007
48
UMT Globalumtglobal.com

A logistics company based in Naperville, Illinois, focused on innovation and technology to provide exceptional and reliable logistical operations

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Naperville 60 2020
49
Outsource Solutions Grouposgusa.com

A full service IT development and maintenance company in Chicagoland area, offering networking, cloud-based solutions, and competitive pricing on hardware/software

IT Services and IT Consulting 馃嚭馃嚫 Naperville 56 1998
50
JBS Logistics & Warehousingkochlogistics.com

Provider of food-grade warehousing, cross-dock operations, trucking services (TL, LTL, expedited), and brokerage solutions for US shippers, with international logistics capabilities

Warehousing and Storage 馃嚭馃嚫 Naperville 47 1986
51
Berkley Program Specialists (a Berkley Company)berkley-ps.com

A leading insurance operation specializing in program business, providing access to top carriers, program management expertise, and reinsurance support for casualty-driven programs

Insurance 馃嚭馃嚫 Naperville 44 n/a
52
CloudNurocloudnuro.ai

Next-gen SaaS company utilizing AI & ML for optimizing SaaS operations, managing spend, enhancing security/compliance, and maximizing ROI for investments

Technology, Information and Internet 馃嚭馃嚫 Naperville 43 2021
53
Talented IT, Inc.talentedit.com

A global IT consulting firm focused on breakthrough performance through intelligent technology use, with skilled professionals committed to client satisfaction

IT Services and IT Consulting 馃嚭馃嚫 Naperville 43 2004
54
HaleMind Inc.halemind.com

Chicago-based healthcare technology startup focused on promoting personal engagement for a healthy life Facilitates data sharing between individuals and healthcare providers for better patient outcomes

Software Development 馃嚭馃嚫 Naperville 28 2015
55
Napco Brandsnapcobrands.com

A family-owned coffee roastery with over 120 years of experience, offering premium coffee brands, private label services, and tailored solutions for diverse clientele

Food and Beverage Services 馃嚭馃嚫 Naperville 26 1984
56
AuctusSolauctussol.com

Global provider of professional services and business enterprise solutions for over 25 years, specializing in Digital Transformation, SAP, Cybersecurity, Data Engineering, and Consulting

IT Services and IT Consulting 馃嚭馃嚫 Naperville 26 2020
57
EGO POWER+egopowerplus.com

Innovative company offering cordless outdoor power equipment powered by a 56-volt Lithium Ion battery for gas-like performance without the noise and fumes

Manufacturing 馃嚭馃嚫 Naperville 26 n/a
58
Solution Partners Servicessolpartservices.com

Solution Partners Services provides comprehensive IT services for various clients, delivering marketplace or customized solutions with an emphasis on proactive delivery and quality assurance

IT Services and IT Consulting 馃嚭馃嚫 Naperville 24 2019
59
Target Decorated Appareltargetda.com

A nationally recognized apparel decorator offering unique decorating techniques for screen-printed and embroidered apparel, alongside packaging and fulfillment services

Retail Apparel and Fashion 馃嚭馃嚫 Naperville 23 1987
60
Trans Lines Inc.translinesinc.com

A transportation company based in Illinois, specializing in strategic shipping solutions with a team of drivers and office members dedicated to prioritizing every shipment

Truck Transportation 馃嚭馃嚫 Naperville 18 2012
61
Sage Tree, LLCadvantageunifiedcommerce.com

Specializing in e-commerce and brand strategy, sales management, content creation, advertising, and marketplace management to help brands succeed online and offline

Advertising Services 馃嚭馃嚫 Naperville 18 n/a
62
Partners Wealth Managementpartnerswealth.com

An independent wealth services firm offering comprehensive planning, investment, and risk management services to affluent families, institutions, and businesses

Financial Services 馃嚭馃嚫 Naperville 13 1991
63
ERMLabs Incermlabs.com

Innovative cloud solutions company offering app development, consulting, and services for various platforms to drive business objectives and increase productivity

IT Services and IT Consulting 馃嚭馃嚫 Naperville 11 2015
64
TecForcetecforce.com

A technology company providing top-tier solutions to help businesses innovate, accelerate time to market, and reimagine their products for a digital-first world

Software Development 馃嚭馃嚫 Naperville 11 2017
65
The Kitchen Masterthekitchenmaster.com

A top design-build firm specializing in cutting-edge kitchen and bathroom remodeling Trust our certified designers and skilled craftsmen for your dream space

Design Services 馃嚭馃嚫 Naperville 10 1977
66
Basin Logisticsbasinlogistics.com

An international third party logistics organization based in Naperville, IL, providing best-in-class services like truckload, intermodal, rail, air, and ocean transportation solutions

Truck Transportation 馃嚭馃嚫 Naperville 9 2016
67
Sharpedge Solutions Incesharpedge.com

Global IT Solutions firm specializing in Business Integration, Business Process Management, and Service-Oriented Architecture for various corporate clients in multiple industries

IT Services and IT Consulting 馃嚭馃嚫 Naperville 9 2000
68
Harter Investment Strategieshis.biz

Investment firm supporting entrepreneurial dreams by fueling passion and igniting business growth, helping bring visions to life and reach new heights

Investment Management 馃嚭馃嚫 Naperville 8 2013
69
Erthe Energy Solutionsertheenergysolutions.com

A woman-owned business with 35 years' experience in energy efficiency, specializing in helping utilities improve program portfolio operations and customer experience

Oil and Gas 馃嚭馃嚫 Naperville 7 2018
70
West Suburban Angels Inc.westsuburbanangels.com

An angel investment group that provides financial support and guidance to startups and early-stage companies looking to grow and scale

Venture Capital and Private Equity Principals 馃嚭馃嚫 Naperville 7 2013
71
Digimite Technologymydigimite.com

A global managed services provider supporting medium to large businesses with IT infrastructure and strategy, ensuring world class customer value

IT Services and IT Consulting 馃嚭馃嚫 Naperville 4 2006
72
Hagen Global Consulting LLChagenglobal.com

A global leader in innovative energy solutions, specializing in project reviews, due diligence, engineering assessments, and tackling unique challenges in the industry

Business Consulting and Services 馃嚭馃嚫 Naperville 4 2017
73
Outsource IT Solutions Group, Inc.osgusa.com

A Naperville-based company offering outsourced IT services to businesses in the Chicago area, specializing in network information technology solutions

IT Services and IT Consulting 馃嚭馃嚫 Naperville 3 n/a
74
PackDashpackdash.com

Supply chain solutions company specializing in multi-channel fulfillment services for ambitious consumer brands, offering 2-day shipping, inventory management, and kitting services

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Naperville 3 2020
75
Plastic Processing Solutionsplasticprocessingsolutions.net

Specializing in plastic processing solutions, the company offers turn-key solutions including machinery, engineering, integration, and mechanical services

Industrial Machinery Manufacturing 馃嚭馃嚫 Naperville 3 2023
76
Viz Pointviz-point.com

A 3rd Party Logistics Company offering tailored supply chain services to businesses seeking growth or cost reduction through innovative freight programs and technology

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Naperville 3 2018
77
Refreshing Renovationsrefreshingrenovations.net

A home repair and renovation company specializing in interior and exterior renovations, flooring, pest exclusion, and general handyman services in various suburban areas

Construction 馃嚭馃嚫 Naperville 2 2012
78
Hema Transportation

The company specializes in transportation and logistics services, ensuring efficient and reliable movement of goods from one location to another

Truck Transportation 馃嚭馃嚫 Naperville 2 2013

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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.

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