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Donaldson is one of the nation’s largest and consistently growing filtration manufacturers. We have a rich history beginning in 1915 when our founder, Frank A. Donaldson, made the first ever successful air cleaner for internal combustion engines. The company has emphasized the role of invention and innovation ever since. We are technology-driven. Of our over 13,000 employees, 1,000 of them are scientists and engineers. We strive to solve complex filtration challenges with our value-added innovations. Today, those innovative filtration systems are on everything from heavy-duty trucks on the interstate to computer disk drives that store valuable information. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI.
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