Wisconsin has at least 50 Century Club Companies. Ownership status of these companies is similar to the national average for 100-year-old companies, with 12% of them public and 88% some form of private ownership (65% are generational family-owned firms; 3-5 are employee-owned; another is a co-op; one is a mutual - sort of customer-owned). As always, please comment if you know of a company that should be added to this list or if you have a correction to any of the information.
1845: Minhas Craft Brewery, Monroe (formerly Joseph Huber Brewing)
1848: Richardson Industries, Sheboygan Falls 6th generation (manufacture wood furniture & building products) Note: Wisconsin became a State in 1848
1949: Kusel Equipment, Watertown (manufacture equipment)
1849: Menasha Corporation, Neenah 5th generation (manufacture packaging products)
1854: Grimm Book Bindery, Madison (book printing, binding and repair)
1857: Northwestern Mutual, Milwaukee mutual (insurance & financial services)
1873: Kohler, Kohler 4th generation (manufacture plumbing & bathroom products)
1874: Elk Mound Seed, Elk Mound
1876: Jockey International, Kenosha 3rd generation (manufacture apparel)
1876: Saeman Lumber, Cross Plains 4th generation (lumber & building supplies)
1880: Usinger's, Milwaukee 4th generation (sausages)
1881: Schwaab Inc, Brookfield 3rd & 4th generations (manufacture stamp products)
1885: Home Lumber, Whitewater 4th generation (lumber & building supplies)
1886: S.C. Johnson & Son, Racine 5th generation (manufacture household products)
1888: Reynolds Transfer & Storage, Madison 5th & 6th generations (moving services)
1889: Jones Dairy Farm, Fort Atkinson 5th generation (sausage & meat products)
1890: J.H. Findorff & Son, Madison (construction)
1891: Schroeder Bros., Two Rivers 4th generation (retail apparel)
1894: Wiedenbeck, Madison 4th generation (metal fabrication)
1895: Fiebing's, Milwaukee 3rd generation (leather care products)
1896: Horicon Bank, Horicon ESOP & Family (Sword Financial Corp)
1897: First Supply, Monona (wholesale plumbing/HVAC)
1899: Nelsen's Hall Bitters Pub, Washington Island
1899: Seroogy's Chocolates, DePere 3rd generation (retail confectionery)
1900: Banner Bancorp, Birnamwood (banking)
1900: Tomah Cash Mercantile Store, Tomah 4th generation (retail department store)
1902: Manitowoc Company, Manitowoc public (manufacture cranes/lifting equipment)
1903: Badger Corrugating, LaCrosse 5th generation + employee ownership (distributor of lumber & building products)
1903: Harley-Davidson, Milwaukee public (manufacture motorcycles) Note: numerous ownership changes over the years, including time as a subsidiary of another company
1904: Bliffert Lumber & Hardware, Milwaukee 4th & 5th generations (retail lumber & building materials)
1905: Badger Meter, Milwaukee public (manufacture meters & devices)
1905: National Presto Industries, Eau Claire public (manufacture small kitchen appliances)
1905: Wigwam Mills, Sheboygan 4th generation (manufacture textile products - socks)
1907: Kaap's Old World Chocolates, Green Bay (confectionery)
1908: Holler House, Milwaukee 3rd generation (tavern & bowling alley)
1908: Smart Motors, Madison 3rd generation (retail automotive)
1910: Ellsworth Cooperative Creamery, Ellsworth co-op (cheese & cheese curds)
1911: Beaver Builders Supply, Holmen 3rd generation (lumber & building materials)
1911: Jack Andrea, Kenosha 4th generation (retail cafe & gift shop)
1914: Neckerman Insurance Services, Madison (insurance agency)
1915: Campbell Lumber & Supply, Superior employee-owned (lumber & building materials)
1916: Nina's Department & Variety Store, Spring Green 4th generation (retail apparel)
1917: Century Fence, Pewaukee 4th generation (pavement marking)
1917: Heiser Automotive, Milwaukee 2nd generation? (retail automotive)
1917: McFarlane Manufacturing, Sauk City 3rd generation (manufacture agricultural equipment)
1917: Oshkosh Corporation, Oshkosh public (manufacture trucks & equipment)
1919: Baird, Milwaukee employee-owned (banking & financial services)
1919: First National Community Bank, New Richmond 3rd generation (banking)
1919: Gordon Auto Parts, Racine 3rd generation (retail auto parts)
1919: Standard Electric Supply, Milwaukee 3rd generation (electrical products distributor & supplier)
1919: Woodman's Market, Janesville employee-owned (retail general merchandise)
1920: Snap-on Tools, Kenosha public (manufacture tools)
1922: Wells Print & Digital, Madison
1923: Superior Die Set, Oak Creek 4th generation
To learn more about how these companies have prospered over 100 years and more, see the book based on my research: Lessons from Century Club Companies: Managing for Long-Term Success, available on Amazon and Barnes & Noble on-line