The 26 largest companies in Fond du Lac (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Mercury Marine mercurymarine.com designs, manufactures, distributes marine engines, parts, and accessories for recreational, commercial, and government boating applications worldwide	Manufacturing	🇺🇸 Fond du Lac	2,887	1939
2	Ahern jfahern.com A mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler systems, and Fabrication for commercial and industrial projects	Construction	🇺🇸 Fond du Lac	1,138	1880
3	Agnesian HealthCare agnesian.com A locally based, not-for-profit integrated healthcare system sponsored by the Congregation of Sisters of St Agnes, providing compassionate care and various healthcare services	Hospitals and Health Care	🇺🇸 Fond du Lac	1,071	1896
4	Moraine Park Technical College morainepark.edu A leading higher education institution in Wisconsin offering various academic programs, apprenticeships, and training opportunities to uplift communities and students	Higher Education	🇺🇸 Fond du Lac	740	1912
5	Grande Cheese Company grande.com This company specializes in bridging innovation and tradition in the dairy industry, creating quality products and establishing genuine connections with customers	Food and Beverage Manufacturing	🇺🇸 Fond du Lac	710	1941
6	Fond du Lac School District fdlsd.org A K-12 educational district located in Fond Du Lac, Wisconsin, United States, providing educational services and support to students	Primary and Secondary Education	🇺🇸 Fond du Lac	564	1859
7	Marian University of Fond du Lac marianuniversity.edu A Catholic university based in Wisconsin founded in 1936, offering a range of degree programs with a focus on community, service, and spiritual traditions	Higher Education	🇺🇸 Fond du Lac	508	1936
8	Trinity Baptist Church trinityfdl.net Independent Baptist church dedicated to glorifying God through preaching Scripture, fostering fellowship, and evangelizing the lost in opposition to modern humanism	Religious Institutions	🇺🇸 Fond du Lac	487	1982
9	Society Insurance societyinsurance.com Specializing in niche insurance coverage for businesses such as restaurants, bars, and medical clinics, with a focus on comprehensive packages and outstanding risk management	Insurance	🇺🇸 Fond du Lac	438	1915
10	Lakeland Care lakelandcareinc.com A Wisconsin-based organization providing long-term care services to frail elders and individuals with disabilities through Wisconsin's Family Care program	Hospitals and Health Care	🇺🇸 Fond du Lac	367	2000
11	Fond du Lac County fdlco.wi.gov Economic development leader in Fond du Lac County, providing services for residents, businesses, and visitors to create a great community	Government Administration	🇺🇸 Fond du Lac	362	1839
12	Excel Engineering, Inc.excelengineer.com National full-service architectural and engineering firm offering design, engineering, and scanning services for various markets, focused on customer-centered teamwork and exceeding client expectations	Architecture and Planning	🇺🇸 Fond du Lac	354	1991
13	Badger Liquor Co., Inc.badgerliquor.com A leading family-owned alcoholic beverage distributor in Wisconsin since 1935, with multiple offices and warehouses across the state	Beverage Manufacturing	🇺🇸 Fond du Lac	322	1935
14	Wells Vehicle Electronics wellsve.com A leading global provider of advanced vehicle electronics solutions for original equipment and replacement applications in various industries around the world	Motor Vehicle Manufacturing	🇺🇸 Fond du Lac	266	1903
15	Equix equixinc.com Equix, Inc offers construction and technical services for infrastructure development, including engineering, utility construction, renewable energy, geotechnical services, and more	Construction	🇺🇸 Fond du Lac	186	1985
16	C.D. Smith Construction cdsmith.com Industry leader in commercial construction services, providing high-quality and safe project solutions from planning to closeout across the United States	Construction	🇺🇸 Fond du Lac	185	1936
17	Quality Packaging, Inc.qpack.com An integrated packaging solutions provider with a 39-year legacy, offering single-source platform for dynamic brands to lead in retail	Packaging and Containers Manufacturing	🇺🇸 Fond du Lac	156	1985
18	Holiday Automotive holidayautomotive.com A family-owned car dealership in Fond du Lac, WI offering new vehicles from various brands, budget-friendly used cars, vehicle service, body shop, and detail services	Retail Motor Vehicles	🇺🇸 Fond du Lac	155	1959
19	BCI Burke Company bciburke.com Designing innovative playgrounds and outdoor fitness equipment to create inclusive environments that promote physical, social, emotional, and cognitive development for communities worldwide	Recreational Facilities	🇺🇸 Fond du Lac	152	1920
20	Fives Giddings & Lewis, LLC fivesgroup.com "A machine tool pioneer offering total solutions for machining challenges with sound, robust designs and unlimited capabilities through modular designs and partnerships"	Machinery Manufacturing	🇺🇸 Fond du Lac	78	1859
21	LEB Insurance Group lebinsurancegroup.com Insurance group providing personalized solutions for individuals, families, and businesses Dedicated brokers offer advocacy and protection, using technology to enhance client experience	Insurance	🇺🇸 Fond du Lac	37	2009
22	Silica For Your Home shopsilica.com A leading retailer in appliances, electronics, furniture, and mattresses, offering a wide selection, competitive prices, delivery, and exceptional customer service	Retail	🇺🇸 Fond du Lac	28	1922
23	Wrightway Home Improvements wrightwaybuilt.com A professional exterior remodeling company specializing in residential replacement services including windows, siding, gutters, doors, roofing, awnings, screens, and pergolas	Construction	🇺🇸 Fond du Lac	13	1977
24	Integrity Saw & Tool Inc integritysaw.com A machinery company located in Fond Du Lac, Wisconsin, specializing in tools and saws for various industrial applications	Machinery Manufacturing	🇺🇸 Fond du Lac	13	n/a
25	Tobin Machining Inc tobinmachining.com A precision machining company specializing in producing and delivering high-quality parts and sub-assemblies through automation, quality processes, and cost-effective solutions	Machinery Manufacturing	🇺🇸 Fond du Lac	13	1923
26	Next Level Manufacturing nextlevelmanufacturing.com A top manufacturing and procurement provider specializing in CNC components, offering innovative solutions to enhance speed, quality, and cost efficiency for clients	Mechanical Or Industrial Engineering	🇺🇸 Fond du Lac	3	2019

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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