These 18 companies have indeed found the good life in Nebraska. Several generational or employee-owned, they have all survived for over 100 years. If you know of a business that has been in continuous, independent operation for 100 years and is not on this list, please let me know in a comment.
1855 NP Dodge, Omaha, Real estate services 5th generation
1856 Byron Reed Company, Omaha, Property management
1857 First National of Nebraska, Omaha Public?
1882 Drake-Williams, Omaha, Custom steel fabrication Employee-owned
1884 Kiewit, Omaha, Construction & engineering Employee-owned
1884 Lueder Construction, Omaha, General contracting & construction
1886 Magnolia Metal Corp, Omaha, Bronze castings & bearings
1891 Wm Krotter Co, O'Neill, Home & auto center 5th generation
1895 Renze, Omaha, Manufacture display products/signage, 3rd & 4th generation
1899 Sack Lumber, Crete, Lumber & building materials 4th generation
1901 Diamond Bar Ranch, Stapleton, Cattle & horses 5th generation
1902 Physicians Mutual Insurance, Omaha, Insurance carrier
1909 Mutual of Omaha, Omaha, Insurance carrier
1910/1928 Mead Lumber & Knecht Home Ctr, Columbus, Lumber/building materials Employee-owned
1916: Burwell Butter Factory (Independent Oil Co), Burwell
1917 HDR, Omaha, Engineering/architecture/construction Employee-owned
1917 Omaha Steaks, Omaha, Food products 5th generation
1917 Union Bank & Trust, Lincoln, Banking & financial services Family-owned
1918 All Makes, Omaha, Office furnishings & fixtures 4th generation