The 32 largest companies in Oakbrook Terrace (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Sirva sirva.com A global leader in relocation services, offering mobility solutions to companies worldwide with a diverse portfolio of brands and innovative technology	Real Estate	🇺🇸 Oakbrook Terrace	3,652	n/a
2	NAV Fund Services navfundservices.com Top-ranked fund administrator with award-winning service and technology, specializing in cost-effective solutions, digital assets, and emerging managers	Financial Services	🇺🇸 Oakbrook Terrace	3,061	1991
3	Joint Commission jointcommission.org The company evaluates and accredits over 20,000 health care organizations in the US to ensure quality and safety standards are met	Hospitals and Health Care	🇺🇸 Oakbrook Terrace	1,670	1951
4	Filtration Group filtrationgroup.com Global provider of innovative filtration consumables serving diverse industries including process technologies, life sciences, and specialty technologies worldwide.	Manufacturing	🇺🇸 Oakbrook Terrace	1,413	n/a
5	Napleton Automotive Group ednapleton.com A multi-generational automotive business founded in 1931, featuring 39 dealerships in six states and emphasizing excellence, teamwork, and community involvement	Motor Vehicle Manufacturing	🇺🇸 Oakbrook Terrace	1,225	1931
6	BGRS sirva.com Global mobility solutions provider offering tailored programs for organizations to meet talent needs worldwide with focus on customer experience	Human Resources Services	🇺🇸 Oakbrook Terrace	913	1963
7	Science Olympiad, Inc.soinc.org Organizing the largest STEM competition in the US, with 7,900 teams and 237,000 student members across all 50 states	Primary and Secondary Education	🇺🇸 Oakbrook Terrace	798	1984
8	Redbox Entertainment Inc.redbox.com Entertainment company providing affordable new release movies and digital streaming options through a nationwide network of entertainment kiosks serving millions of customers	Entertainment Providers	🇺🇸 Oakbrook Terrace	734	2002
9	Sara Lee Frozen Bakery saraleefrozenbakery.com Industry-leading frozen bakery and dessert maker providing quality products for foodservice, retail, and in-store bakery needs Committed to customer satisfaction and innovation in food	Food and Beverage Manufacturing	🇺🇸 Oakbrook Terrace	651	n/a
10	Angelica angelica.com Specializes in healthcare linen supply, offering quality products and strategic solutions to improve cost control, infection prevention, and patient satisfaction.	Hospitals and Health Care	🇺🇸 Oakbrook Terrace	554	1878
11	Graycor graycor.com A reputable general contractor offering industrial and commercial construction services across North America with a focus on safety, excellence, and performance	Construction	🇺🇸 Oakbrook Terrace	518	1921
12	ACH Food Companies, Inc.achfood.com A leading consumer packaged goods company specializing in Baking Ingredients and Cooking Oil, inspiring confidence and creativity in home cooking	Food and Beverage Manufacturing	🇺🇸 Oakbrook Terrace	480	1904
13	Pine Tree pinetree.com Develops, acquires, leases, and manages retail properties across the United States. Works with superstores, specialty shops, and local chains.	Real Estate	🇺🇸 Oakbrook Terrace	478	1995
14	Hi-Tech Solutions htsconsulting.com A technology consulting company in Illinois providing technical resources to mid-sized and Fortune 100 companies in the Chicago area since 1991	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	471	n/a
15	Allied Van Lines allied.com A reputable moving company with expertise in domestic and international relocations, offering packing, transportation, and storage services for individuals and businesses	Truck Transportation	🇺🇸 Oakbrook Terrace	384	1928
16	Staffing Network LLC staffingnetwork.com A recruiting partner specializing in industrial, engineering, and operations staffing, providing temporary, temp-to-hire, and permanent placement solutions for businesses	Staffing and Recruiting	🇺🇸 Oakbrook Terrace	376	n/a
17	MajorKey Technologies majorkeytech.com MajorKey enhances security performance by reducing user friction and business risk, providing Advisory, Integration, and Managed Services for various aspects of security	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	315	1998
18	NAI Hiffman hiffman.com The largest independent real estate services firm in the Chicago-area, offering leasing, property management, tenant representation, capital markets, and project services	Leasing Non-residential Real Estate	🇺🇸 Oakbrook Terrace	304	1981
19	Amvotech Solutions Inc amvotech.com A team of IT professionals offering high quality Business Management and ERP solutions, custom software development, and application integration to enhance client businesses	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	215	2015
20	Colson Group colsongroup.com Global leader in caster manufacturing, offering innovative and high-quality mobility solutions for various applications, with a diverse workforce and unmatched global footprint	Retail Office Equipment	🇺🇸 Oakbrook Terrace	182	n/a
21	FCA International finishingcontractors.org Community of contractors in glass, metal, drywall, flooring, coatings, painting, and signage providing education, advocacy, and business support.	Construction	🇺🇸 Oakbrook Terrace	174	1997
22	Castle Automotive Group castleautomotivegroup.com Automotive group with 14 locations in the Midwest offering multiple quality brands Committed to transparency and customer experience, focusing on employee growth	Retail Motor Vehicles	🇺🇸 Oakbrook Terrace	151	1980
23	Nordic Energy Services, LLC nordicenergy-us.com Energy management firm specializing in natural gas and electric procurement, risk management, cost reduction strategies, bill audit services, and energy consulting for commercial clients	Oil and Gas	🇺🇸 Oakbrook Terrace	52	2002
24	Simplelogix simplelogix.com A global technology company leveraging emerging technologies to provide customized solutions, maximize efficiency, and lower operational costs for customers worldwide	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	37	2007
25	AIS, Inc.aislabs.com Full-service IT Technology Firm specializing in Infrastructure, Virtualization, Consulting, Cloud Hosting, Security, and Managed Services for various sectors Complete solution for business technology needs	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	37	2002
26	Peters & Associates (Acquired by Ascend Technologies)teamascend.com This company enables business growth through innovative IT solutions, secure systems, and optimized user productivity, helping businesses expand and innovate	IT Services and IT Consulting	🇺🇸 Oakbrook Terrace	34	1981
27	Mark-it Express mark-itexpress.com A 3PL (freight broker) based in Oakbrook, IL, specializing in refrigerated freight but capable of handling all types of shipments Trusted partner providing proactive communication	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Oakbrook Terrace	33	2009
28	ECC Insurance Brokers, LLC a Member of Bridge Specialty Group eccins.com Providing expert guidance in Risk Management and Casualty Coverages, specializing in Directors and Officers, Errors and Omissions, Health Care, and Financial Services	Insurance	🇺🇸 Oakbrook Terrace	30	1999
29	McDonnell Investment Management loomissayles.com An asset management firm specializing in fixed income investments for institutions and private clients, with a focus on risk management and credit research	Investment Management	🇺🇸 Oakbrook Terrace	25	2001
30	INSURHAUS Inc.insurhaus.com An insurance brokerage and risk management company focused on providing tailored insurance solutions, building long-term partnerships, and delivering exceptional service to clients	Insurance	🇺🇸 Oakbrook Terrace	21	2006
31	Hangar A hangara.com A leader in e-logistics automation, offering advanced dock-to-door solutions for expedited cargo with dynamic pricing, e-booking, tracking, and real-time exception management	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Oakbrook Terrace	13	2016
32	Brotschul Potts LLC brotschulpotts.com A legal services firm dedicated to providing fair and reliable assistance for individuals and businesses, focused on client needs and industry knowledge	Law Practice	🇺🇸 Oakbrook Terrace	9	2007

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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