Camco Mfg. Co., a leading manufacturer of products for the RV, residential, automotive and marine industries, was named one of Business North Carolina magazine’s Top 100 privately held companies for the fourth consecutive year. The Greensboro, N.C., company moved to number 77 in the rankings, a jump of eight places from its position last year on the list.

The revenue-based rankings are compiled by accounting firm Grant Thornton.

Camco was founded in 1966 by Donald Caine to produce non-toxic freshwater antifreeze. The company has grown from a single employee to more than 250 workers and produces upwards of 3,000 products at manufacturing facilities in Greensboro, Elkhart, Ind., Portland, Ore., and Boston.