Donaldson Company, Inc. DCI

DCI Company Overview

Donaldson Company, Inc. is a U.S.-based industrial manufacturer specializing in filtration systems and replacement parts used across industrial, transportation, aerospace, life sciences, and energy applications. The company operates primarily in the filtration and environmental control industries, designing products that remove contaminants from air, liquids, and gases to improve equipment performance, regulatory compliance, and operational efficiency. Its primary revenue drivers include filtration replacement parts, industrial dust collection systems, engine air and liquid filtration products, and specialized membrane technologies for bioprocessing and microelectronics markets.

Founded in 1915 by Frank Donaldson Sr., the company began as a manufacturer of air cleaners for agricultural machinery and gradually expanded into heavy-duty engine filtration and industrial applications. Over time, Donaldson diversified into advanced filtration technologies serving sectors such as food and beverage, pharmaceuticals, semiconductor manufacturing, and clean energy. The company’s competitive positioning is supported by its large installed base of filtration equipment, recurring aftermarket replacement demand, global manufacturing footprint, and long-standing relationships with original equipment manufacturers (OEMs) and industrial distributors.