The 30 largest companies in Lombard (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Transdev North America transdevna.com Provides safe, reliable, and innovative transportation services including bus, rail, paratransit, autonomous vehicles, and maintenance across 45 US states.	Urban Transit Services	🇺🇸 Lombard	7,841	n/a
2	First Transit transdevna.com A global leader in mobility solutions, operating transportation systems, maintaining fleets, and delivering innovative solutions for cities, universities, companies, and airports	Ground Passenger Transportation	🇺🇸 Lombard	3,864	n/a
3	Healthcare Solutions Team myhst.com A dedicated team of health insurance advocates providing personalized coverage solutions for families, individuals, and groups across the nation	Insurance	🇺🇸 Lombard	977	2007
4	Viskase Companies, Inc.viskase.com Manufacturing and supplying diverse artificial casings and packaging solutions for the global meat processing industry with quality and innovation.	Packaging and Containers Manufacturing	🇺🇸 Lombard	890	1925
5	Credit Union 1 creditunion1.org A financial institution offering innovative solutions to help members achieve economic potential, with a focus on service, community, and affordability	Financial Services	🇺🇸 Lombard	648	1958
6	National University of Health Sciences nuhs.edu Leading institution for health science education offering preparation in chiropractic, naturopathic medicine, acupuncture, massage therapy, biomedical science, and more	Higher Education	🇺🇸 Lombard	548	1906
7	Power Wellness powerwellness.com A leading management company in the medical fitness industry, overseeing over 50 fitness centers nationwide and serving over 120,000 customers	Wellness and Fitness Services	🇺🇸 Lombard	471	1996
8	True Lacrosse truelacrosse.com True Lacrosse is dedicated to educating and developing young lacrosse athletes, instilling confidence, integrity, and leadership skills on and off the field Operating in multiple states	Spectator Sports	🇺🇸 Lombard	454	2008
9	Pernix Group, Inc.pernixgroup.com A leading construction company offering general contracting, design-build, preconstruction, and EPC services to private and public clients in various markets	Construction	🇺🇸 Lombard	404	1995
10	The Autism Therapy Group atgtogether.com Specializing in Applied Behavioral Analysis (ABA) therapy, our team provides in-home services to help children lead happy, productive, and fulfilling lives	Hospitals and Health Care	🇺🇸 Lombard	395	n/a
11	The RoomPlace theroomplace.com A furniture retailer with showrooms in Illinois, Indiana, and Wisconsin, offering coordinated room designs, savings on furniture sets, and fast delivery	Furniture and Home Furnishings Manufacturing	🇺🇸 Lombard	386	n/a
12	Lexington Hospice Services lexingtonhealth.com Lexington Hospice provides quality end-of-life care, support, and compassion to patients and their loved ones, focusing on dignity and comfort	Hospitals and Health Care	🇺🇸 Lombard	373	1984
13	Quest Food Management Services questfms.com A food management company providing fresh, scratch-made food and personalized service to K-12, higher education, and business accounts in the Midwest	Hospitality	🇺🇸 Lombard	357	1985
14	Integrative Systems integrativesystems.com A strategic IT solutions and services company that helps businesses optimize enterprise software applications, drive business transformation, and thrive in a competitive environment	IT Services and IT Consulting	🇺🇸 Lombard	345	2001
15	Culligan By WaterCo culligan.com A leader in water treatment systems for residential, commercial, and industrial use with over 80 years of experience and global presence	Manufacturing	🇺🇸 Lombard	326	2011
16	Corporate Concepts, Inc.continuainteriors.com This company provides tailored office solutions, including commercial furniture and space design, to create collaborative and motivating work environments for organizations	Furniture and Home Furnishings Manufacturing	🇺🇸 Lombard	321	1983
17	Dearborn Group mydearborngroup.com An insurance company providing ancillary benefits such as life, disability, vision, critical illness, and accident insurance to employer groups nationwide	Insurance	🇺🇸 Lombard	307	1969
18	Turtle Wax, Inc.turtlewax.com A leading car care brand with over 75 years of innovation, offering top-selling products distributed globally and rooted in Chicago	Motor Vehicle Manufacturing	🇺🇸 Lombard	226	1946
19	Autism Care Therapy autismcaretherapy.com Provider of ABA therapy services, specializing in evidence-based, individualized interventions for individuals with developmental disabilities to promote learning and skill development	Mental Health Care	🇺🇸 Lombard	179	2017
20	Cosco Industries coscoindustries.com Manufacturer and marketer of diverse marking devices and stamps through continuous product development efforts and first class customer service for global clients.	Manufacturing	🇺🇸 Lombard	178	n/a
21	Valdes Architecture & Engineering valdeseng.com A multidisciplinary engineering and architecture firm providing technical excellence, project management, and staffing solutions across specialized industries since 1992	Design Services	🇺🇸 Lombard	174	1992
22	Sahara Homecare saharahomecare.com The company partners with Illinois government agencies to offer free services to qualifying senior citizens in the Chicagoland area	Hospitals and Health Care	🇺🇸 Lombard	167	2010
23	Beer House beerhousechicago.com A unique venue in Lombard offering 60 tap and hundreds of bottled beers, live entertainment, sports viewing, and food options from nearby restaurants	Restaurants	🇺🇸 Lombard	165	2013
24	A-to-Be a-to-be.com With nearly 40 years of experience, the company provides tolling and mobility technology solutions for thousands of lanes and millions of customer accounts daily	IT Services and IT Consulting	🇺🇸 Lombard	153	n/a
25	Midwest Mechanical (Commercial, Industrial HVAC Mechanical Services - a Service Logic Company)midwestmech.com A Chicago-based commercial HVAC and facilities management company focused on energy efficiency, offering maintenance, optimization, and retrofit projects for building owners and operators	Facilities Services	🇺🇸 Lombard	134	1974
26	TalaTrans Worldwide Corporation talatrans.com A global logistics provider with offices in multiple locations, offering door-to-door services worldwide Committed to customer satisfaction and innovative solutions	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Lombard	42	2012
27	Circle 8 Logistics globaltranz.com A Chicago-based non-asset logistics company providing multimodal transportation services across North America with a focus on experienced, honest, and motivated staff	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Lombard	16	2001
28	NueVista Group nuevista.com Provider of expert IT consulting and professional services focusing on maximizing value from technology systems and applications, with a reputation for quality, experience, and integrity	IT Services and IT Consulting	🇺🇸 Lombard	16	2002
29	Column Information Security is now MajorKey Technologies majorkeytech.com MajorKey delivers harmonized technologies for digital transformation, offering services like Digital Strategy, DevOps, Cloud Adoption, Managed Services, and more Top partnership with industry leaders	IT Services and IT Consulting	🇺🇸 Lombard	15	n/a
30	1 Temp Home 1temphome.com A provider of energy-efficient solutions for homes and businesses, specializing in insulation, weatherization, HVAC, windows/doors replacements, and energy audits	Construction	🇺🇸 Lombard	3	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

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