Born out of the creation of a simple air filter for a farm tractor 100 years ago, Donaldson today is one of the world’s largest filtration manufacturers, providing innovative filtration systems for a wide variety of products ranging from heavy-duty trucks to computer hard drives and automotive sensors. Our emphasis on invention and innovation has earned us a reputation for quality and technical excellence, with over 1,800 U.S. and international patents. Of our more than 11,700 employees in 44 countries around the world, 1,000 of them are scientists and engineers. These men and women have pioneered countless innovations, including nanofiber technology using fibers less than a micron in width. Our research and development efforts continue to focus on producing smaller, lighter and more efficient filters and filtration systems. Today, our products are found in a wide variety of industries, including aerospace, agriculture, construction, defense, electronics, food and beverage, manufacturing, power generation, transportation and more. Our mission is to provide filtration solutions that improve people's lives, enhance customers’ equipment performance and protect the environment. We are committed to integrity in all of our relationships and expect our employees to do the right thing in all situations. We work hard to build trust and credibility by exhibiting the highest ethical standards, sound judgment, character and courage in our actions. Donaldson is a member of the S&P MidCap 400 Index, and our shares are traded on the New York Stock Exchange under the symbol DCI.