The 25 largest companies in Rochester Hills (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	FANUC America Corporation fanucamerica.com Provider of industrial robotics, CNC systems, and factory automation solutions with lifetime maintenance and 24/7 service support.	Automation Machinery Manufacturing	🇺🇸 Rochester Hills	2,166	1982
2	Trico Products tricoproducts.com A global supplier of innovative driver visibility products for light, commercial, and recreational vehicles, focused on exceeding customer expectations and driving profitable growth	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	769	1917
3	BOS Automotive Products, Inc.bos.de An automotive company located in Michigan, specializing in automotive components and solutions	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	616	n/a
4	GST AutoLeather, Inc.pangeamade.com Global leather supplier for top automotive brands, offering full interior solutions with a focus on quality and innovation in mobility interiors	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	493	n/a
5	Guardian Angel guardianangel.net This company provides Medicare certified home care, private duty services, durable medical equipment, outpatient rehab, hospice care, and non-emergency transportation to pediatric and adult clients	Hospitals and Health Care	🇺🇸 Rochester Hills	485	1994
6	Rochester Christian University rcu.edu A Christian institution offering accredited liberal arts education with 19 majors and a master's degree in missional leadership	Higher Education	🇺🇸 Rochester Hills	365	1959
7	InfuSystem infusystem.com Healthcare service provider specializing in infusion pumps and related products for patients in various medical settings, offering rentals, sales, and repair services across North America	Medical Equipment Manufacturing	🇺🇸 Rochester Hills	364	1986
8	Marquardt U.S.marquardt.com Global leader in technology solutions since 1925, specializing in electromechanical and electronic switches for automotive, e-mobility, medical devices, and industrial applications	Appliances, Electrical, and Electronics Manufacturing	🇺🇸 Rochester Hills	341	1981
9	ShoreWise Consulting shorewiseconsulting.com Specializes in banking and insurance technology solutions, digital transformation, AI integration, enhancing efficiency and customer experience for businesses.	IT Services and IT Consulting	🇺🇸 Rochester Hills	330	2012
10	HealthQuest Physical Therapy hqpt.com HealthQuest Physical Therapy offers exceptional hands-on rehabilitation for a wide range of conditions, providing personalized treatment plans and one-on-one attention to every patient	Wellness and Fitness Services	🇺🇸 Rochester Hills	313	1999
11	Ottobock Care (Wright & Filippis)firsttoserve.com A leading provider of prosthetics, orthotics, custom mobility products, and accessibility solutions, dedicated to improving patients' lives since 1944	Hospitals and Health Care	🇺🇸 Rochester Hills	252	1944
12	OneMonroe (Monroe Engineering)monroeengineering.com A global industrial manufacturing company offering quality hardware solutions to diverse industries, with capabilities including custom manufacturing and vendor managed inventory services	Manufacturing	🇺🇸 Rochester Hills	236	1957
13	MPI PRODUCTS LLC mpiproducts.com Global leader in fineblanked components, specializing in innovative die design and process engineering Largest organization in North America with diverse value-added options for customers	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	215	1969
14	Saturn Electronics & Engineering saturnee.com A leading supplier of electronics, solenoids, and wiring for various industries, offering innovative design engineering and custom manufacturing services globally	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	181	1985
15	Vitro Automotive Glass vitro.com Expert glass manufacturer for vehicles, offering customized solutions by collaborating with engineers, designers, and marketing departments to enhance the overall experience	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	173	n/a
16	Hi-Tech Mold & Engineering, Inc.hitechmold.com A family-owned business specializing in engineering and mold making, offering cost-effective solutions and full-service capabilities for the plastics and tooling industries	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	167	1982
17	Spalding DeDecker sda-eng.com Employee-owned engineering firm specializing in infrastructure, land development, and surveying services, with expertise in niche areas like industrial surveying and pavement management	Civil Engineering	🇺🇸 Rochester Hills	166	1954
18	Prefix Corporation prefix.com A Michigan-based company specializing in prototype designs and concept vehicles for automotive and aviation industries with a focus on advanced technologies	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	161	1979
19	T.A. Systems ta-systems.com A manufacturer specializing in automation equipment, assembly systems, test equipment, and specialized machinery, providing comprehensive support for product launches	Automation Machinery Manufacturing	🇺🇸 Rochester Hills	88	n/a
20	SolvIT, Inc.go2si.com Global technology solutions provider delivering best-in-class IT innovations and premium services for successful implementation and maintenance at the highest standards	IT Services and IT Consulting	🇺🇸 Rochester Hills	77	1999
21	Bmax bmax.com A leading provider of advanced metal processing solutions, specializing in High Voltage Cable Crimping and Circular Welding using Magnetic Pulse Technology	Manufacturing	🇺🇸 Rochester Hills	70	n/a
22	Global Automotive Systems, LLC globalautosys.com Global Automotive Systems provides innovative process and product solutions for mobility safety and sustainability, specializing in manufacturing various components for the automotive industry	Motor Vehicle Manufacturing	🇺🇸 Rochester Hills	23	1946
23	Midwest Warehousing midwestwarehousing.com A company with decades of experience in warehousing, storage, fulfillment, and distribution, offering personalized services to meet individual clients' evolving needs	Warehousing and Storage	🇺🇸 Rochester Hills	19	1994
24	eFlex Systems eflexsystems.com Innovative software solutions empower manufacturers to embrace Industry 40, become agile and data-driven, and achieve best in class status	Software Development	🇺🇸 Rochester Hills	10	1972
25	WEC Group LLC wecgroupllc.com A growing engineering and manufacturing firm with a talented team offering fabrication, machining, welding, and design services to various industries	Mechanical Or Industrial Engineering	🇺🇸 Rochester Hills	7	2006

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

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