Abstract: The collection contains files on over 5,000 Wisconsin businesses, each of which employed more than 100 employees. The information was solicited, collated and organized between 1987 and 2006, but information dates from 1880 to 2006. The contents in each file varies, but most include survey forms, newspaper clippings, and information reproduced from other published sources. The collection also includes a database that can be searched on 32 different fields and includes references to the repositories throughout the state where company records can be found. The database includes the company name, location (city and county), incorporation date, names of founders, Standard Industrial Classification codes (as determined by the initial study coordinators), and any other names or the names of parent/subsidiary companies associated with the company.