For over 100 years, Donaldson has been solving customers' complex filtration needs. Today we are one of the largest providers of unique filtration technologies and high-quality filters and parts. In 1915, a young Frank Donaldson Sr.—then a Bull Tractor Company salesman—visited a customer whose tractor kept breaking down in his dusty field. Frank hand-fashioned a simple air cleaner to protect the engine and invented the world’s first effective air cleaner for a tractor engine.

Today Donaldson continues to innovate, using our filtration technologies and processes to provide customers with the solutions they need.