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In March 2001, the education and health services supersector had the most establishments with 1,000 or more workers. The 1,593 largest establishments in this sector employed a total of 3.5 million workers.
Manufacturing had the next highest number of the largest establishments (1,479) followed by professional and business services (1,002) and trade, transportation, and utilities (635). In all, there were 6,021 private-industry establishments with 1,000 or more workers in March 2001.
The BLS Quarterly Census of Employment and Wages program produced these data. Data presented here are for all private-industry workers covered by State unemployment insurance programs. Data for 2001 are preliminary and subject to revision. Find more information in "Employment and Wages, Annual Averages, 2001," BLS Bulletin 2554.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Largest establishments most common in education and health services, manufacturing at https://www.bls.gov/opub/ted/2003/jan/wk3/art04.htm (visited March 22, 2023).