Donaldson is a manufacturer and supplier of filtration systems and replacement parts. It operates through three business segments: Mobile Solutions, Industrial Solutions, and Life Sciences. The Mobile Solutions segment provides filtration and emissions products for equipment used in construction, mining, agriculture, and transportation. The Industrial Solutions segment offers air, gas, liquid, hydraulic, and power generation filtration, as well as aerospace and defense filtration systems. The Life Sciences segment is responsible for bioprocessing, food and beverage, medical, microelectronics, and vehicle electrification filtration products. Donaldson caters to aerospace, agriculture, defense, energy, marine, and other industries.